Sample records for lynx lynx lynx

  1. Lynx Special Section Assessment of Canada Lynx Research and Conservation

    E-print Network

    ABSTRACT The ecology of Canada lynx (Lynx canadensis) and their main prey, snowshoe hares (Lepus americanus hare. Canada lynx (Lynx canadensis) populations and those of their main prey, snowshoe hares (LepusLynx Special Section Assessment of Canada Lynx Research and Conservation Needs in the Southern

  2. Oral papillomatosis in Canada lynx (Lynx canadensis).

    PubMed

    Wolfe, Lisa L; Spraker, Terry R

    2007-10-01

    We observed 11 cases of oral papillomatosis among 48 free-ranging Canada lynx (Lynx canadensis) that had been shipped to Colorado for translocation purposes. Lesions were 1-3 mm, multifocal, nonpigmented sessile masses and occurred on the ventral lingual surface. Adverse clinical signs were not observed. Six of the 11 cases resolved and the remainder appeared to be self-limiting when affected animals were examined lynx while in captivity. Histopathologic lesions included marked hyperplasia of the mucosal epithelium causing thickening of the stratum spinosum and corneum. Ballooning degeneration of epithelial cells with intracytoplasmic inclusions were observed. Papilloma virus was found on negative contrast electron microscopy. Papillomatosis was seen in lynx from three geographically distant sources (British Columbia, five of 21 individuals; Quebec, five of 17; Yukon, one of four) suggesting the causative virus may be widespread among North American lynx populations. PMID:17984270

  3. Potential Impacts of Climate Change on Habitat and Conservation Priority Areas for Lynx canadensis (Canada Lynx)

    E-print Network

    Potential Impacts of Climate Change on Habitat and Conservation Priority Areas for Lynx canadensis canadensis (Canada Lynx) Acknowledgements Thanks to Chris Iverson (Assistant Director, Watershed, Fish areas for Lynx canadensis (Canada Lynx) Abstract The dependence of Lynx canadensis (Canada Lynx

  4. Survival rates and causes of mortality in Eurasian lynx ( Lynx lynx) in multi-use landscapes

    Microsoft Academic Search

    Henrik Andrén; John D. C. Linnell; Olof Liberg; Reidar Andersen; Anna Danell; Jens Karlsson; John Odden; P aû l F. Moa; Per Ahlqvist; Tor Kvam; Robert Franzén; Peter Segerström

    2006-01-01

    Causes of mortality were described for 245 radio-marked Eurasian lynx (Lynx lynx) in five different Scandinavian study areas. Furthermore, the survival rates and the population growth rates were estimated for three of the study areas where 202 lynx were followed for a total of 314 radio-years. The main causes of mortality in adult Eurasian lynx in all our study areas

  5. Oral Papillomatosis in Canada Lynx (Lynx canadensis)

    Microsoft Academic Search

    Lisa L. Wolfe; Terry R. Spraker

    2007-01-01

    We observed 11 cases of oral papillomatosis among 48 free-ranging Canada lynx (Lynx canadensis) that had been shipped to Colorado for translocation purposes. Lesions were 1-3 mm, multifocal, nonpigmented ses- sile masses and occurred on the ventral lingual surface. Adverse clinical signs were not ob- served. Six of the 11 cases resolved and the remainder appeared to be self-limiting when

  6. ORIGINAL PAPER Estimation of the Iberian lynx (Lynx pardinus) population

    E-print Network

    Paris-Sud XI, Université de

    ORIGINAL PAPER Estimation of the Iberian lynx (Lynx pardinus) population in the Doñana area, SW /Accepted: 14 August 2010 /Published online: 5 October 2010 # Springer-Verlag 2010 Abstract The Iberian lynx (Lynx pardinus) has a highly restricted geographic distribution, limited even within the Iberian

  7. Prey density, environmental productivity and home-range size in the Eurasian lynx (Lynx lynx)

    Microsoft Academic Search

    Ivar Herfindal; John D. C. Linnell; John Odden; Erlend Birkeland Nilsen; Reidar Andersen

    2005-01-01

    Variation in size of home range is among the most important parameters required for effective conservation and management of a species. However, the fact that home ranges can vary widely within a species makes data transfer between study areas difficult. Home ranges of Eurasian lynx Lynx lynx vary by a factor of 10 between different study areas in Europe. This

  8. The Canada lynx (Lynx canadensis) was listed as a threatened species under the Endan-

    E-print Network

    The Canada lynx (Lynx canadensis) was listed as a threatened species under the Endan- gered Species record for Canada lynx, Lynx canadensis, in Labrador. Canadian Field Naturalist 107:367­368. KOEHLER, G RECORD FOR CANADA LYNX, LYNX CANADENSIS, IN WESTERN MONTANA Jay A. Kolbe1,2 and John R. Squires1 Key

  9. Lynx Special Section Hierarchical Den Selection of Canada Lynx in Western

    E-print Network

    (Lynx canadensis; hereafter lynx) at multiple ecological scales based on 57 dens from 19 females located Canada lynx, den selection, ecological scale, habitat selection, Lynx canadensis, mature forests, MontanaLynx Special Section Hierarchical Den Selection of Canada Lynx in Western Montana JOHN R. SQUIRES,1

  10. A Snow-tracking Protocol Used to Delineate Local Lynx, Lynx canadensis, Distributions

    E-print Network

    A Snow-tracking Protocol Used to Delineate Local Lynx, Lynx canadensis, Distributions JOHN R local lynx, Lynx canadensis, distributions. Canadian Field-Naturalist 118(4): 583-589. Determining Canada Lynx (Lynx canadensis) distribution is an important management need, especially at the southern

  11. Carnivora: The primary structure of the major hemoglobin component from adult European lynx ( Lynx lynx , Felidae)

    Microsoft Academic Search

    Aftab Ahmed; Meeno Jahan; Gerhard Braunitzer

    1992-01-01

    The complete primary structure of the major hemoglobin component from the adult European lynx (Lynx lynx) is presented. Presence of two hemoglobin components and three chains, ßA, ßB, and a, identified by gel electrophoresis. The purification of the globin chains achieved by ion-exchange chromatography. The globin chains were digested with trypsin. The peptide generated were purified by reversed-phase HPLC. Sequencing

  12. Landscape location affects genetic variation of Canada lynx (Lynx canadensis)

    Microsoft Academic Search

    M. K. S CHWARTZ; L. S. M ILLS; Y. O RTEGA; L. F. R UGGIERO; F. W. A LLENDORF

    2003-01-01

    The effect of a population's location on the landscape on genetic variation has been of interest to population genetics for more than half a century. However, most studies do not consider broadscale biogeography when interpreting genetic data. In this study, we propose an operational definition of a peripheral population, and then explore whether peripheral populations of Canada lynx (Lynx canadensis)

  13. Seroprevalence of antibodies to Toxoplasma gondii in lynx (Lynx canadensis) and bobcats (Lynx rufus) from Québec, Canada.

    PubMed

    Labelle, P; Dubey, J P; Mikaelian, I; Blanchette, N; Lafond, R; St-Onge, S; Martineau, D

    2001-10-01

    The seroprevalence of antibodies to Toxoplasma gondii was investigated in trapped lynx (Lynx canadensis) and bobcats (Lynx rufus) from Québec, Canada. Forty-seven of 106 (44%) lynx and 4 of 10 (40%) bobcats had positive titers for T. gondii (> or = 25) by means of the modified agglutination test incorporating mercaptoethanol and formalin-fixed tachyzoites. Seroprevalence was significantly higher (P < 0.0001) in adult lynx than in juvenile lynx. The presence of antibodies to T. gondii in lynx and bobcats suggests that this organism is widespread in the wild and that exposure to wild felids and game animals from Québec may represent a potential source of infection for humans. PMID:11695397

  14. The Scientific Basis for Lynx Conservation

    E-print Network

    443 Chapter 16 The Scientific Basis for Lynx Conservation: Qualified Insights Leonard F. Ruggiero knowl- edge of lynx ecology, (2) the pertinence of this knowledge to lynx conser- vation;444 Chapter 16--Ruggiero indicate that we know very little about lynx ecology in the United States

  15. Lynx Home Range and Movements in Montana

    E-print Network

    337 Chapter 11 Lynx Home Range and Movements in Montana and Wyoming: Preliminary Results John R data suggest that lynx in Montana and Wyoming have large home ranges; this result supports the Koehler and Aubry (1994) contention that lynx from southern lynx populations have large spatial-use areas. Annual

  16. Winter Prey Selection of Canada Lynx in

    Microsoft Academic Search

    The roles that diet and prey abundance play in habitat selection of Canada lynx (Lynx canadensis) in the contiguous United States is poorly understood. From 1998-2002, we back-tracked radiocollared lynx (6 F, 9 M) for a distance of 582 km and we located 86 kills in northwestern Montana, USA. Lynx preyed on 7 species that included blue grouse (Dendragapus obscurus),

  17. Canada Lynx-bobcat (Lynx canadensis 3 L. rufus) Hybrids at the Southern Periphery of Lynx range in Maine, Minnesota and New Brunswick

    E-print Network

    Canada Lynx-bobcat (Lynx canadensis 3 L. rufus) Hybrids at the Southern Periphery of Lynx range (Lynx canadensis) and bobcat (L. rufus) was recently documented in the United States, but little of Canada lynx (L. canadensis). Morphologically, Canada lynx are differentiated from bobcats by their longer

  18. Landscape location affects genetic variation of Canada lynx (Lynx canadensis).

    PubMed

    Schwartz, M K; Mills, L S; Ortega, Y; Ruggiero, L F; Allendorf, F W

    2003-07-01

    The effect of a population's location on the landscape on genetic variation has been of interest to population genetics for more than half a century. However, most studies do not consider broadscale biogeography when interpreting genetic data. In this study, we propose an operational definition of a peripheral population, and then explore whether peripheral populations of Canada lynx (Lynx canadensis) have less genetic variation than core populations at nine microsatellite loci. We show that peripheral populations of lynx have fewer mean numbers of alleles per population and lower expected heterozygosity. This is surprising, given the lynx's capacity to move long distances, but can be explained by the fact that peripheral populations often have smaller population sizes, limited opportunities for genetic exchange and may be disproportionately affected by ebbs and flows of species' geographical range. PMID:12803633

  19. Pyloric trichobezoar in a Canadian lynx (Lynx canadensis).

    PubMed

    Kottwitz, Jack; Munsterman, Amelia S

    2013-12-01

    An adult female Canadian lynx (Lynx canadensis) was presented with a 3-wk history of anorexia and lethargy. Initial examination and diagnostics did not provide a diagnosis. The lynx continued to demonstrate vague clinical signs, including anorexia and an abnormal gait. During follow-up immobilizations 2 wk later, a barium gastrointestinal study revealed a pyloric obstruction. Abdominal exploratory surgery was elected, and a gastrotomy and an enterotomy of the proximal duodenum were performed to remove the pyloric obstruction. The obstruction was determined to be a trichobezoar. Fleas, a likely cause of hair ingestion through grooming, were noted during surgical preparation. The lynx made a full recovery from surgery. Reoccurrence of the trichobezoar was prevented after surgery with the use of monthly flea control and three times a week hairball laxative. PMID:24450081

  20. Research Article Winter Prey Selection of Canada Lynx in

    E-print Network

    abundance play in habitat selection of Canada lynx (Lynx canadensis) in the contiguous United States.2193/2005-445 KEY WORDS alternative prey, Canada lynx, food habits, Lepus americanus, Lynx canadensis, Montana, snowshoe hare. Northern populations of Canada lynx (Lynx canadensis) exhibit both numeric (Elton

  1. Carnivora: the primary structure of the major hemoglobin component from adult European lynx (Lynx lynx, Felidae).

    PubMed

    Ahmed, A; Jahan, M; Braunitzer, G

    1992-02-01

    The complete primary structure of the major hemoglobin component from the adult European lynx (Lynx lynx) is presented. Presence of two hemoglobin components and three chains, beta A, beta B, and alpha, identified by gel electrophoresis. The purification of the globin chains achieved by ion-exchange chromatography. The globin chains were digested with trypsin. The peptide generated were purified by reversed-phase HPLC. Sequencing of the native chains up to 42 cycles and of the tryptic peptides were deduced by Edman degradation in liquid- and gas-phase sequencer. The primary structure established aligned with those of human Hb-A. The comparison of lynx globin chains with other representatives of the Felidae, lion, tiger, jaguar, leopard, and cat revealed high homology. PMID:1515033

  2. Plague as a Mortality Factor in Canada Lynx (Lynx canadensis) Reintroduced to Colorado

    Microsoft Academic Search

    Margaret A. Wild; Tanya M. Shenk; Terry R. Spraker; Fort Collins

    2006-01-01

    As part of a species recovery pro- gram, 129 Canada lynx (Lynx canadensis) originating from British Columbia, the Yukon, Manitoba, and Quebec, Canada, and Alaska, USA, were reintroduced to southwestern Col- orado, USA, from 1999 to 2003. Of 52 lynx mortalities documented by October 2003, six lynx, including a female and her 5-mo-old kitten, had evidence of Yersinia pestis infection

  3. Data for estimating eaten prey masses from Eurasian lynx Lynx Lynx scats in Central and East Europe

    Microsoft Academic Search

    Ferdinand Rühe; Thomas Burmester; Michael Ksinsik

    2007-01-01

    To derive a model which allows estimating eaten prey masses from lynxLynx lynx Linnaeus, 1758 scats, we fed 3 roe deerCapreolus capreolus, 2 wild boarsSus scrofa, 1 fallow deerDama dama, 1 mouflonOvis ammon musimon, 1 European hareLepus europaeus and 1 daily diet of miceMus musculus to two adult lynx. The percentage of prey use decreased with an increase in the

  4. Differentiation and levels of genetic variation in northern European lynx (Lynx lynx) populations revealed by microsatellites and mitochondrial DNA analysis

    Microsoft Academic Search

    Linda Hellborg; Christopher W. Walker; Eli Knispel Rueness; John E. Stacy; Ilpo Kojola; Harri Valdmann; Carles Vil; Barbara Zimmermann; Kjetill S. Jakobsen; Hans Ellegren

    2002-01-01

    The European lynx (Lynx lynx) has experienced significant decline in population numbers over large parts of its former distribution area in central and northern Europe. In Scandinavia (Sweden and Norway), the species has been subject to intense hunting and in the early 20th century the population size may have been as low as about 100 animals. During the rest of

  5. Adult-onset hypothyroidism in a lynx (Lynx canadensis).

    PubMed

    Greer, Leah L; Troutman, Mitchell; McCracken, Malcolm D; Ramsay, Edward C

    2003-09-01

    A 19-yr-old female lynx (Lynx canadensis) presented for an acute onset of anorexia and reluctance to move. Physical examination, radiography, hematology, and serum biochemistry revealed evidence of renal failure, presumptive uremic gastritis, chronic intervertebral disk disease at T13-L1, and markedly low serum levels of total thyroxine (1.54 nmol/L) and total triixodothyronine (0.55 nmol/L). Twenty-five hours after its original presentation, the lynx exhibited horizontal nystagmus, which has been suggested as a clinical sign associated with hypothyroidism in domestic dogs. The lynx was euthanatized because of poor prognosis, and medical management concerns related to its chronic renal failure. Necropsy examination substantiated that the lynx had true hypothyroidism with 60-90% of the thyroid gland replaced with adipose tissue. Although feline adult-onset hypothyroidism may have low incidence, it should still be considered as a cause of nonspecific signs of disease in cats, as well as signs suggestive of hypothyroidism. Routine monitoring of baseline exotic felid thyroid levels throughout life would help to identify normal values and diagnose a potential disease that has obscure clinical signs. PMID:14582793

  6. The Scientific Basis for Lynx Conservation: Can

    E-print Network

    471 Chapter 18 Epilogue The Scientific Basis for Lynx Conservation: Can We Get There From Here, this book was written under very unusual circumstances. We began the book shortly after the lynx was to elucidate the scientific basis for conserving lynx for use in listing deliberations and in establishing land

  7. LYNX DEPREDATION ON DOMESTIC SHEEP IN NORWAY

    Microsoft Academic Search

    JOHN ODDEN

    We studied depredation rates on free-ranging domestic sheep (Ovis arie s) by Eurasian lynx (Lynx lyn x) i n 2 areas in Norway to test whether selected individuals or a demographic group within a lynx population kill a di s - proportionate share of livestock. During 6 grazing seasons from 199 4 to 199 9 , we monitored 3 4

  8. Lynx Conservation in an Ecosystem Management

    E-print Network

    419 Chapter 15 Lynx Conservation in an Ecosystem Management Context Kevin S. McKelvey, USDA Forest management context, management for lynx must occur in the context of the needs of other species, watershed, practical, and likely to provide for the needs of a variety of species, including lynx. Because our

  9. Conservation of Lynx in the United States

    E-print Network

    455 Chapter 17 Conservation of Lynx in the United States: A Systematic Approach to Closing Critical. To avoid haphazard research and to maximize the benefits to lynx conservation with limited research funds, a carefully coordinated approach to lynx research is needed. The purpose of this chapter is to provide

  10. Ecology of Lynx in Northern Canada and

    E-print Network

    265 Chapter 9 Ecology of Lynx in Northern Canada and Alaska 1 Garth Mowat, Fish and Wildlife Abstract--We review the ecology of lynx in the northern part of its range, drawing heavily on the results of food shortage. Habitat use by lynx varies geographically, but tendstotrackthatofsnowshoehares

  11. Helminth fauna of the Iberian lynx, Lynx pardinus.

    PubMed

    Torres, J; Garciá-Perea, R; Gisbert, J; Feliu, C

    1998-09-01

    Specimens of 12 helminth species were collected from carcasses of eight Lynx pardinus (Temminck, 1827), a carnivore endemic to the Iberian Peninsula. These species included: Brachylaima sp. (12.5%) (Trematoda); Taenia pisiformis (12.5%), T. polyacantha (25%), T. taeniaeformis (25%) and Mesocestoides litteratus (37.5%) (Cestoda); Eucoleus aerophilus (12.5%), Ancylostoma tubaeforme (12.5%), Toxocara cati (37.5%), Toxascaris leonina (62.5%), Vigisospirura potekhina potekhina (12.5%), Mastophorus muris (12.5%) and Physaloptera praeputialis (12.5%) (Nematoda). The helminth fauna in Iberian lynx is compared with that of L. canadensis and L. rufus in America, and for L. lynx in Eurasia. The potential relationships between the parasitological data and some geographical, historical and dietary factors are discussed. PMID:9765373

  12. Scent-marking behaviour and social dynamics in a wild population of Eurasian lynx Lynx lynx.

    PubMed

    Vogt, Kristina; Zimmermann, Fridolin; Kölliker, Mathias; Breitenmoser, Urs

    2014-07-01

    Scent-marking is widespread among mammals and has been observed in many felid species. Although the behaviour is well-described, little is known about its function in wild felid populations. We investigated patterns of scent-marking and its role in intra- and intersexual communication among resident and non-resident Eurasian lynx Lynx lynx by observing interactions among wild lynx at natural marking sites by means of infrared camera traps. Marking activity of resident animals showed a peak during the mating season and was lowest during the time when females gave birth and lactated. Both sexes scent-marked, but male lynx visited marking sites much more often than females and marked relatively more often when visiting a site. Most visits to marking sites were by residents but we also observed scent-marking by non-residents. Juveniles were never observed marking. We found no evidence of lynx regularly renewing scent-marks after a certain 'expiry date' but the presence of a strange scent-mark triggered over-marking. Males responded similarly to the presence of another individual's scent-mark, irrespective of whether it was the top- or the underlying scent-mark in a mixture of scent-marks they encountered. Our results suggest that marking sites could serve as 'chemical bulletin boards', where male lynx advertise their presence and gain information on ownership relationships in a given area. Females placed their urine marks on top of the ones left by resident males, but further studies are needed to explain the functions of over-marking in females. PMID:24814909

  13. RESEARCH ARTICLE Dispersal promotes high gene flow among Canada lynx

    E-print Network

    studies addressing the population structure of Canada lynx (Lynx canadensis) have been surprisingly fluctuations, the population dynamics and ecology of Canada lynx (Lynx canadensis) have long garneredRESEARCH ARTICLE Dispersal promotes high gene flow among Canada lynx populations across mainland

  14. RESEARCH ARTICLE Dispersal promotes high gene flow among Canada lynx

    E-print Network

    Row, Jeffrey R.

    structure of Canada lynx (Lynx canadensis) have been surprisingly equivocal, despite a large amount dynamics and ecology of Canada lynx (Lynx canadensis) have long garnered the attention of populationRESEARCH ARTICLE Dispersal promotes high gene flow among Canada lynx populations across mainland

  15. RESEARCH ARTICLE Functional connectivity of lynx at their southern range

    E-print Network

    lynx Á Lynx canadensis Á Circuit theory Á Occupancy Á Functional connectivity Á Habitat IntroductionRESEARCH ARTICLE Functional connectivity of lynx at their southern range periphery in Ontario, we modeled occurrence of Canada lynx (Lynx canaden- sis) in relation to landscape characteristics

  16. Efficacy of lures and hair snares to detect lynx

    E-print Network

    to detect presence of lynx (Lynx canadensis). We tested 2 key elements of the protocol: 1) a hair- snaring listing the lynx (Lynx canadensis) as "threatened" under the Endangered SpeciesAct. The "take" provisionsEfficacy of lures and hair snares to detect lynx Gregory Jf: McDaniel, Kevin S. McKelvey, John R

  17. Research Note Circadian Activity Patterns of Canada Lynx in Western

    E-print Network

    activity, Canada lynx, circadian activity, Lepus americanus, Lynx canadensis, snowshoe hares. The United States Fish and Wildlife Service listed lynx (Lynx canadensis) as Threatened under the United StatesResearch Note Circadian Activity Patterns of Canada Lynx in Western Montana JAY A. KOLBE,1 Montana

  18. The federal listing of lynx (Lynx lynx) as Threatened under the Endangered Species Act

    E-print Network

    . Kolbe and John R. Squires: United States Forest Service, Rocky Mountain Research Station, Box 8089 Missoula, MT 59807, USA; e-mail for Kolbe: jaykolbe@hotmail.com. Address for Thomas W. Parker: P. O. Box 1340, Swan Valley, MT 59826, USA. An effective box trap for capturing lynx Jay A. Kolbe, John R

  19. Large-Scale Genetic Structuring of a Widely Distributed Carnivore - The Eurasian Lynx (Lynx lynx)

    PubMed Central

    Rueness, Eli K.; Naidenko, Sergei; Trosvik, Pål; Stenseth, Nils Chr.

    2014-01-01

    Over the last decades the phylogeography and genetic structure of a multitude of species inhabiting Europe and North America have been described. The flora and fauna of the vast landmasses of north-eastern Eurasia are still largely unexplored in this respect. The Eurasian lynx is a large felid that is relatively abundant over much of the Russian sub-continent and the adjoining countries. Analyzing 148 museum specimens collected throughout its range over the last 150 years we have described the large-scale genetic structuring in this highly mobile species. We have investigated the spatial genetic patterns using mitochondrial DNA sequences (D-loop and cytochrome b) and 11 microsatellite loci, and describe three phylogenetic clades and a clear structuring along an east-west gradient. The most likely scenario is that the contemporary Eurasian lynx populations originated in central Asia and that parts of Europe were inhabited by lynx during the Pleistocene. After the Last Glacial Maximum (LGM) range expansions lead to colonization of north-western Siberia and Scandinavia from the Caucasus and north-eastern Siberia from a refugium further east. No evidence of a Berinigan refugium could be detected in our data. We observed restricted gene flow and suggest that future studies of the Eurasian lynx explore to what extent the contemporary population structure may be explained by ecological variables. PMID:24695745

  20. Exposure to disease agents in the endangered Iberian lynx ( Lynx pardinus )

    Microsoft Academic Search

    Melody E. Roelke; Warren E. Johnson; Javier Millán; Francisco Palomares; Eloy Revilla; Alejandro Rodríguez; Javier Calzada; Pablo Ferreras; Luis León-Vizcaíno; Miguel Delibes; Stephen J. O’Brien

    2008-01-01

    The Iberian lynx (Lynx pardinus) is the most endangered felid species in the world. Lynx populations have decreased dramatically in size and distribution\\u000a in the last four decades, thus becoming increasingly vulnerable to catastrophic events such as epizooties. From 1989 to 2000,\\u000a serum samples were obtained from 48 free-ranging lynx captured in the Doñana National Park (DNP, n?=?31) and mountains

  1. Physiologically Persistent Corpora lutea in Eurasian Lynx (Lynx lynx) – Longitudinal Ultrasound and Endocrine Examinations Intra-Vitam

    PubMed Central

    Painer, Johanna; Jewgenow, Katarina; Dehnhard, Martin; Arnemo, Jon M.; Linnell, John D. C.; Odden, John; Hildebrandt, Thomas B.; Goeritz, Frank

    2014-01-01

    Felids generally follow a poly-estrous reproductive strategy. Eurasian lynx (Lynx lynx) display a different pattern of reproductive cyclicity where physiologically persistent corpora lutea (CLs) induce a mono-estrous condition which results in highly seasonal reproduction. The present study was based around a sono-morphological and endocrine study of captive Eurasian lynx, and a control-study on free-ranging lynx. We verified that CLs persist after pregnancy and pseudo-pregnancy for at least a two-year period. We could show that lynx are able to enter estrus in the following year, while CLs from the previous years persisted in structure and only temporarily reduced their function for the period of estrus onset or birth, which is unique among felids. The almost constant luteal progesterone secretion (average of 5 ng/ml serum) seems to prevent folliculogenesis outside the breeding season and has converted a poly-estrous general felid cycle into a mono-estrous cycle specific for lynx. The hormonal regulation mechanism which causes lynx to have the longest CL lifespan amongst mammals remains unclear. The described non-felid like ovarian physiology appears to be a remarkably non-plastic system. The lynx's reproductive ability to adapt to environmental and anthropogenic changes needs further investigation. PMID:24599348

  2. The selection of breeding dens by the endangered Iberian lynx (Lynx pardinus): implications for its conservation

    Microsoft Academic Search

    Nestor Fernandez; Francisco Palomares

    2000-01-01

    We investigated the preferences shown by Iberian lynx (Lynx pardinus) for structures and sites for denning in Donana National Park. Lynx proved to be highly selective regarding the features of the natural structures selected, but their preferences concerning the characteristics of the habitat for the denning sites were not so evident. All located litters were born inside hollow trunks with

  3. Serologic Survey for Viral and Bacterial Infections in Western Populations of Canada Lynx (Lynx canadensis)

    Microsoft Academic Search

    Roman Biek; Randall L. Zarnke; Colin Gillin; Margaret Wild; John R. Squires; Mary Poss

    2002-01-01

    A serologic survey for exposure to pathogens in Canada lynx (Lynx canadensis )i n western North America was conducted. Sam- ples from 215 lynx from six study areas were tested for antibodies to feline parvovirus (FPV), feline coronavirus, canine distemper virus, fe- line calicivirus, feline herpesvirus, Yersinia pes- tis, and Francisella tularensis. A subset of sam- ples was tested for

  4. Patterns of ovarian and luteal activity in captive and wild Canada lynx ( Lynx canadensis)

    Microsoft Academic Search

    Kerry V. Fanson; Nadja C. Wielebnowski; Tanya M. Shenk; Jennifer H. Vashon; John R. Squires; Jeffrey R. Lucas

    2010-01-01

    Canada lynx face some unique breeding restrictions, which may have implications for population viability and captive management. The goal of this study was to improve our understanding of basic reproductive physiology in Canada lynx. Using fecal hormone metabolite analysis, we established normative patterns of fecal estrogen (fE) and progestagen (fP) expression in captive and wild female Canada lynx. Our results

  5. Sarcocystis neurona-like encephalitis in a Canada lynx (Felis lynx canadensis).

    PubMed

    Forest, T W; Abou-Madi, N; Summers, B A; Tornquist, S J; Cooper, B J

    2000-09-01

    A 13-yr-old female Canada lynx (Felis lynx canadensis) died after a short clinical illness, and necropsy revealed multifocal, nonsuppurative encephalitis with protozoal schizonts present in cerebral vascular endothelial cells. The schizonts stained immunohistochemically with antiserum to Sarcocystis neurona. This is the first report of Sarcocystis encephalitis in the Canada lynx. PMID:11237148

  6. Overview of Lynx. Technical report

    SciTech Connect

    Scott, M.L.

    1989-08-01

    A programming language can provide much better support for interprocess communication than a library package can. Most message-passing languages limit this support to communication between the pieces of a single program, but this need not be the case. Lynx facilitates convenient, typesafe message passing not only within applications, but also between applications, and among distributed collections of servers. Specifically, it addresses issues of compiler statelessness, late binding, and protection that allow runtime interaction between processes that were developed independently and that do not trust each other. Implementation experience with Lynx has yielded important insights into the relationship between distributed operating systems and language run-time support packages, and into the inherent costs of high-level message-passing semantics.

  7. Plague as a mortality factor in Canada lynx (Lynx canadensis) reintroduced to Colorado.

    PubMed

    Wild, Margaret A; Shenk, Tanya M; Spraker, Terry R

    2006-07-01

    As part of a species recovery program, 129 Canada lynx (Lynx canadensis) originating from British Columbia, the Yukon, Manitoba, and Quebec, Canada, and Alaska, USA, were reintroduced to southwestern Colorado, USA, from 1999 to 2003. Of 52 lynx mortalities documented by October 2003, six lynx, including a female and her 5-mo-old kitten, had evidence of Yersinia pestis infection as determined by fluorescent antibody test and/or culture. Postmortem findings in these lynx were characterized by pneumonia, ranging from acute suppurative pneumonia, to multifocal necrotizing pneumonia, to fibrinous bronchopneumonia. Histopathologic examination of lung revealed multiple areas of inflammation and consolidation, areas of edema and hemorrhage, and bacteria surrounded by extensive inflammation. Spleens had severe lymphoid depletion and hypocellular red pulp. Lymphadenomegaly was observed in only one plague-affected lynx. We hypothesize that these Canada lynx were exposed to Y. pestis by infected prey, and these are the first reports of plague in this species. PMID:17092896

  8. Canada lynx Lynx canadensis habitat and forest succession in northern Maine, USA

    USGS Publications Warehouse

    Hoving, C.L.; Harrison, D.J.; Krohn, W.B.; Jakubas, W.J.; McCollough, M.A.

    2004-01-01

    The contiguous United States population of Canada lynx Lynx canadensis was listed as threatened in 2000. The long-term viability of lynx populations at the southern edge of their geographic range has been hypothesized to be dependent on old growth forests; however, lynx are a specialist predator on snowshoe hare Lepus americanus, a species associated with early-successional forests. To quantify the effects of succession and forest management on landscape-scale (100 km2) patterns of habitat occupancy by lynx, we compared landscape attributes in northern Maine, USA, where lynx had been detected on snow track surveys to landscape attributes where surveys had been conducted, but lynx tracks had not been detected. Models were constructed a priori and compared using logistic regression and Akaike's Information Criterion (AIC), which quantitatively balances data fit and parsimony. In the models with the lowest (i.e. best) AIC, lynx were more likely to occur in landscapes with much regenerating forest, and less likely to occur in landscapes with much recent clearcut, partial harvest and forested wetland. Lynx were not associated positively or negatively with mature coniferous forest. A probabilistic map of the model indicated a patchy distribution of lynx habitat in northern Maine. According to an additional survey of the study area for lynx tracks during the winter of 2003, the model correctly classified 63.5% of the lynx occurrences and absences. Lynx were more closely associated with young forests than mature forests; however, old-growth forests were functionally absent from the landscape. Lynx habitat could be reduced in northern Maine, given recent trends in forest management practices. Harvest strategies have shifted from clearcutting to partial harvesting. If this trend continues, future landscapes will shift away from extensive regenerating forests and toward landscapes dominated by pole-sized and larger stands. Because Maine presently supports the only verified populations of this federally threatened species in the eastern United States, changes in forest management practices could affect recovery efforts throughout that region.

  9. Bregmatic Bones in North American Lynx

    Microsoft Academic Search

    Richard H. Manville

    1959-01-01

    Anomalous bregmatic fontanolle bones were present in 279 of 1790 skulls of Lynx rufus examined, but with no apparent correlation with age, sex, or place of origin of the specimens. Examination of 472 skulls of Lynx canadensis disclosed only one possessing bregmatic bones.

  10. Bregmatic bones in North American lynx.

    PubMed

    MANVILLE, R H

    1959-11-01

    Anomalous bregmatic fontanelle bones were present in 279 of 1790 skulls of Lynx rufus examined, but with no apparent correlation with age, sex, or place of origin of the specimens. Examination of 472 skulls of Lynx canadensis disclosed only one possessing bregmatic bones. PMID:14420785

  11. Phylogenetic and Phylogeographic Analysis of Iberian Lynx Populations

    Microsoft Academic Search

    W. E. Johnson; J. A. GODOY; F. PALOMARES; M. DELIBES; M. FERNANDES; E. REVILLA; S. J. O'BRIEN

    2004-01-01

    The Iberian lynx (Lynx pardinus), one of the world's most endangered cat species, is vulnerable due to habitat loss, increased fragmentation of populations, and precipitous demographic reductions. An understanding of Iberian lynx evolutionary history is necessary to develop rational management plans for the species. Our objectives were to assess Iberian lynx genetic diversity at three evolutionary timescales. First we analyzed

  12. Comparative metabolism of gestagens and estrogens in the four lynx species, the Eurasian ( Lynx lynx), the Iberian ( L. pardinus), the Canada lynx ( L. canadensis) and the bobcat ( L. rufus)

    Microsoft Academic Search

    M. Dehnhard; K. Fanson; A. Frank; S. V. Naidenko; A. Vargas; K. Jewgenow

    2010-01-01

    With the increasing prevalence of faecal hormone metabolite analysis, it is important to develop a better understanding of the dynamics of faecal metabolite composition. The aim of this study was to compare the quantitative faecal gestagen and estrogen metabolite composition in the four lynx species: Eurasian lynx, Iberian lynx, Canada lynx and bobcats. Comparative HPLC immunograms were generated from faecal

  13. Patterns of ovarian and luteal activity in captive and wild Canada lynx (Lynx canadensis).

    PubMed

    Fanson, Kerry V; Wielebnowski, Nadja C; Shenk, Tanya M; Vashon, Jennifer H; Squires, John R; Lucas, Jeffrey R

    2010-12-01

    Canada lynx face some unique breeding restrictions, which may have implications for population viability and captive management. The goal of this study was to improve our understanding of basic reproductive physiology in Canada lynx. Using fecal hormone metabolite analysis, we established normative patterns of fecal estrogen (fE) and progestagen (fP) expression in captive and wild female Canada lynx. Our results indicate that Canada lynx have persistent corpora lutea, which underlie their uncharacteristic fP profiles compared to other felids. Thus, fP are not useful for diagnosing pregnancy in Canada lynx. We also found that Canada lynx are capable of ovulating spontaneously. Captive females had higher concentrations of fE and fP than wild females. Both populations exhibit a seasonal increase in ovarian activity (as measured by fE) between February and April. Finally, there was evidence of ovarian suppression when females were housed together. PMID:20850438

  14. Modeling the reintroduction of lynx to the southern portion of Todd D. Steury*, Dennis L. Murray1

    E-print Network

    Steury, Todd D.

    populations of lynx (Lynx canadensis) and snowshoe hares (Lepus americanus) to determine prey densities; Lynx canadensis; Population modelling; Prey density; Reintroduction; Release protocols; Snowshoe hare 1 State University, Terre Haute, IN 47809, USA. #12;The Canada lynx, Lynx canadensis, oc

  15. Canine distemper virus-associated encephalitis in free-living lynx (Lynx canadensis) and bobcats (Lynx rufus) of eastern Canada.

    PubMed

    Daoust, Pierre-Yves; McBurney, Scott R; Godson, Dale L; van de Bildt, Marco W G; Osterhaus, Albert D M E

    2009-07-01

    Between 1993 and 1999, encephalitis caused by morbillivirus was diagnosed by immunohistochemistry and histology in six lynx (Lynx canadensis) and one bobcat (Lynx rufus) in the eastern Canadian provinces of New Brunswick and Nova Scotia. Five of the six cases in lynx occurred within an 11-mo period in 1996-97. A second bobcat with encephalitis caused by unidentified protozoa and a nematode larva also had immunohistochemical evidence of neurologic infection by morbillivirus. The virus was identified as canine distemper virus (CDV) by reverse transcriptase polymerase chain reaction and nucleotide sequencing in four of five animals from which frozen tissue samples were available, and it was isolated in cell culture from one of them. To our knowledge, this is the first report of disease caused by CDV in free-living felids in North America. PMID:19617471

  16. Taphonomic analysis of leporid remains obtained from modern Iberian lynx ( Lynx pardinus) scats

    Microsoft Academic Search

    Lluís Lloveras; Marta Moreno-García; Jordi Nadal

    2008-01-01

    Distinguishing leporid bones accumulated by diurnal raptors, owls, mammals and humans is essential to understand not only past human subsistence activities but also past ecology. This is particularly relevant in Iberian Palaeolithic sites where leporid remains usually constitute the most abundant taxon. As far as terrestrial mammal carnivores are concerned, the Iberian lynx (Lynx pardinus) would be the main leporid

  17. Patterns of testicular activity in captive and wild Canada lynx ( Lynx canadensis)

    Microsoft Academic Search

    Kerry V. Fanson; Nadja C. Wielebnowski; Tanya M. Shenk; Walter J. Jakubas; John R. Squires; Jeffrey R. Lucas

    2010-01-01

    Canada lynx are listed as a threatened species in the contiguous US. Understanding the reproductive characteristics (i.e., mating system, behavior, physiology) of a species is useful for ensuring effective in situ and ex situ management plans. The goal of this study was to describe patterns of androgen expression in both captive and wild male Canada lynx using fecal hormone metabolite

  18. A PROGRAMMATIC AGREEMENT TO MIMINIZE HIGHWAY PROJECT IMPACTS ON CANADA LYNX (LYNX CANADENSIS) IN COLORADO

    Microsoft Academic Search

    Sarah A. Barnum

    Multiple highway projects which may affect lynx are proposed throughout the State of Colorado. Because these projects are federally funded, they must comply with the requirements of the ESA. The process for determining if and how a project will impact lynx will be similar for all projects. Therefore, a programmatic agreement between CDOT, FHWA and USFWS, outlining a standard methodology

  19. An Inverse Problem: Trappers Drove Hares to Eat Lynx Abstract: The Canadian lynx and snowshoe hare pelt data by the Hudson Bay Company did

    E-print Network

    Logan, David

    1 An Inverse Problem: Trappers Drove Hares to Eat Lynx Bo Deng1 Abstract: The Canadian lynx than following the peak density of the hares,2 that of the lynx leads it, creating the hares-eat-lynx in our mechanistic hares-lynx-competitor-trapper (HLCT) model where competitor stands for all8 predators

  20. Hierarchical Den Selection of Canada Lynx in Western Montana

    Microsoft Academic Search

    John R. Squires; Nicholas J. Decesare; Jay A. Kolbe; Leonard F. Ruggiero

    2008-01-01

    ABSTRACT We studied den selection of Canada lynx (Lynx canadensis; hereafter lynx) at multiple ecological scales based on 57 dens from 19 females located in western Montana, USA, between 1999 and 2006. We considered 3 spatial scales in this analysis, including den site (11-m- radius circle surrounding dens), den area (100-m-radius circle), and den environ (1-km radius surrounding dens). Lynx

  1. Winter Prey Selection of Canada Lynx in Northwestern Montana

    Microsoft Academic Search

    JOHN R. SQUIRES; LEONARD F. RUGGIERO

    2007-01-01

    ABSTRACT The roles that diet and prey abundance,play in habitat selection of Canada,lynx (Lynx canadensis) in the contiguous,United States is poorly understood. From 1998–2002, we back-tracked radiocollared lynx (6 F, 9 M) for a distance of 582 km and we located 86 kills in northwestern Montana, USA. Lynx preyed on 7 species that included blue grouse (Dendragapus obscurus), spruce grouse

  2. Canada Lynx in the Great Lakes Region 2003 Annual Report

    E-print Network

    Minnesota, University of

    Canada Lynx in the Great Lakes Region 2003 Annual Report to USDA Forest Service and MN Cooperative Lynx Ecology in the Great Lakes Region project. We carried out initial work in the Superior National. We have developed a website for the Canada Lynx Ecology in the Great Lakes Region project (www

  3. Canada Lynx in the Great Lakes Region 2005 Annual Report

    E-print Network

    Minnesota, University of

    Canada Lynx in the Great Lakes Region 2005 Annual Report to USDA Forest Service and MN Cooperative not be cited without permission. #12;Canada Lynx in the Great Lakes Region 2005 Annual Report ii Executive Summary We summarize the third year of a project on Canada lynx ecology in the Great Lakes region

  4. Canada Lynx in the Great Lakes Region 2004 Annual Report

    E-print Network

    Minnesota, University of

    Canada Lynx in the Great Lakes Region 2004 Annual Report to USDA Forest Service and MN Cooperative. #12;Canada Lynx in the Great Lakes Region 2004 Annual Report ii Executive Summary We summarize the second year of a project on the Canada lynx ecology in the Great Lakes region. The project is designed

  5. The Lynx Distributed Programming Language: Motivation, Design, and Experience

    E-print Network

    Scott, Michael L.

    The Lynx Distributed Programming Language: Motivation, Design, and Experience Michael L. Scott Technical Report 308 August 1989; revised August 1990 #12;The Lynx Distributed Programming Language to communication between the pieces of a single program, but this need not be the case. Lynx facilitates convenient

  6. Population fragmentation and extinction in the Iberian lynx

    Microsoft Academic Search

    Alejandro Rodriguez; Miguel Delibes

    2003-01-01

    We studied the relationship between extinction frequencies of Iberian lynx subpopulations (Lynx pardinus) and their size and isolation during a 35-year period of strong geographic range contraction. At the end of this period there were fewer fragmentation events, fewer lynx populations of small size, and less isolation between them, than in simulated geographic ranges derived from a random distribution of

  7. HEMATOLOGIC AND SERUM CHEMISTRY VALUES OF CAPTIVE CANADIAN LYNX

    Microsoft Academic Search

    John L. Weaver; Mark R. Johnson

    We present baseline values for 12 hematologic and 17 serum chemistry parameters collected from 22 captive lynx (Felis lynx canadensis) in December 1992, at Ronan, Montana (USA). There were no significant differences in hematologic parameters between yearlings and adults or between sexes. Lynx originally captured in the wild had significantly higher mean (±SE) counts of neutrophils (7.7 ± 0.37 x

  8. Patterns of postnatal development in skulls of lynxes, genus Lynx (Mammalia: Carnivora).

    PubMed

    Garcia-Perea, R

    1996-09-01

    Studies on ossification patterns and other ontogenetic events associated with postnatal cranial growth of wild felids are scarce. An analysis of developmental processes undergone by several cranial structures (presphenoidal and sphenooccipital synchondroses, temporal and sagittal crests, and deciduous and permanent teeth) during postnatal growth has been conducted on a sample of 336 specimens belonging to the four Recent species of lynxes (Lynx pardinus, Lynx lynx, Lynx rufus, and Lynx canadensis). Age has been estimated based on tooth replacement, skull size, and by counting the annual lines of cementum growth. Comparison of the results obtained for each of the four species reveal (1) a single pattern for both tooth replacement and ossification of the sphenooccipital synchondrosis, (2) two ossification patterns for the presphenoidal synchondrosis, (3) a common pattern for development of temporal ridges and sagittal crest showing different degrees of morphological expression, and (4) evidence suggesting the involvement of a heterochronic process, neoteny, in the morphological differentiation of several populations and species of the genus Lynx. These data also support the hypothesis that processes involved in the replacement of carnassials are based on functional requirements. PMID:8765807

  9. The Effect of Snowmobile Trails on Coyote Movements Within Lynx Home Ranges

    Microsoft Academic Search

    JAY A. KOLBE; JOHN R. SQUIRES; DANIEL H. PLETSCHER; LEONARD F. RUGGIERO

    2007-01-01

    Coyotes (Canis latrans) and Canada lynx (Lynx canadensis) are sympatric throughout much of the lynx's southern range. Researchers and managers have suggested that the presence of compacted snowmobile trails may allow coyotes to access lynx habitat from which they were previously excluded by deep, unconsolidated snow. This could then allow coyotes to more effectively compete with lynx for snowshoe hares

  10. Sir --As director of the laboratory that analysed the samples for the National Lynx

    E-print Network

    Fernández-Juricic, Esteban

    Sir -- As director of the laboratory that analysed the samples for the National Lynx Survey to the damaging yet unsubstantiated conclusions in your Opinion article "Lynch mob turns on lynx researchers"1 and News article "Fur flies over lynx survey's suspect samples"2 about sampling for Canada lynx (Lynx

  11. Esophageal hiatal hernia in three exotic felines--Lynx lynx, Puma concolore, Panthera leo.

    PubMed

    Hettlich, Bianca F; Hobson, H Phil; Ducoté, Julie; Fossum, Theresa W; Johnson, James H

    2010-03-01

    Hiatal hernia was diagnosed in three exotic felines-lynx (Lynx lynx), cougar (Puma concolore), and lion (Panthera leo). All cats had a history of anorexia. Thoracic and abdominal radiographs showed evidence of a soft tissue mass within the caudal mediastinum suggestive of a hiatal hernia in all animals. A barium esophagram was performed in one case. All animals underwent thoracic or abdominal surgery for hernia reduction. Surgical procedures included: intercostal thoracotomy with herniorrhaphy and esophagopexy (lynx and cougar), and incisional gastropexy (lion). Concurrent surgical procedures performed were gastrotomy for gastric foreign body removal and jejunostomy tube placement. Clinical signs related to the hiatal hernia disappeared after surgery and recurrence of signs was not reported for the time of follow-up. PMID:20722259

  12. Serologic survey for viral and bacterial infections in western populations of Canada lynx (Lynx canadensis).

    PubMed

    Biek, Roman; Zarnke, Randall L; Gillin, Colin; Wild, Margaret; Squires, John R; Poss, Mary

    2002-10-01

    A serologic survey for exposure to pathogens in Canada lynx (Lynx canadensis) in western North America was conducted. Samples from 215 lynx from six study areas were tested for antibodies to feline parvovirus (FPV), feline coronavirus, canine distemper virus, feline calicivirus, feline herpesvirus, Yersinia pestis, and Francisella tularensis. A subset of samples was tested for feline immunodeficiency virus; all were negative. For all other pathogens, evidence for exposure was found in at least one location. Serologic evidence for FPV was found in all six areas but was more common in southern populations. Also, more males than females showed evidence of exposure to FPV. Overall, prevalences were low and did not exceed 8% for any of the pathogens tested. This suggests that free-ranging lynx rarely encounter common feline pathogens. PMID:12528455

  13. Factors conditioning the camera-trapping efficiency for the Iberian lynx ( Lynx pardinus )

    Microsoft Academic Search

    Francisco Guil; Sandra Agudín; Nuria El-Khadir; Mariana Fernandez-Olalla; Juan Figueredo; Francisco G. Domínguez; Paloma Garzon; Gregorio Gonzalez; Jaime Muñoz-Igualada; Javier Oria; Fernando Silvestre

    2010-01-01

    Camera trapping is the most used method for surveying medium-sized carnivores in Spain. The main target for these surveys\\u000a has been the Iberian lynx, the most endangered cat in the world. The Iberian lynx conservation program has received the largest\\u000a EU LIFE projects grant. So, efficiency is a key goal for managing this grant. During 2003 and 2007, we have

  14. Spatiotemporal dynamics of Toxoplasma gondii infection in Canadian lynx (Lynx canadensis) in western Québec, Canada.

    PubMed

    Simon, Audrey; Bigras Poulin, Michel; Rousseau, Alain N; Dubey, Jitender P; Ogden, Nicholas H

    2013-01-01

    Toxoplasma gondii, one of the more common zoonotic parasites in the world, can cause serious illness in humans and other animals worldwide. Felids are the only known host that can shed T. gondii oocysts, which are essential to the perpetuation of the parasite. In much of boreal Canada, the Canadian lynx (Lynx canadensis) is the only wild felid host that could contribute to environmental contamination with T. gondii oocysts. We estimated the prevalence of T. gondii antibodies in Canadian lynx from western Québec and compared our results with earlier findings in the same region 12 yr earlier. We investigated factors associated with seroconversion, including age, sex, geographic location, and possible co-occurrence with domestic cats (Felis catus), and we assessed the proportion of lynx shedding T. gondii oocysts. Blood and fecal samples were collected from 84 lynx harvested by trappers in the eastern part of the study area during winter 2009-2010. Sera were tested for antibodies to T. gondii by the modified agglutination test (cutoff titer 1:50) and fecal samples for parasite eggs by fecal flotation. Antibodies to T. gondii were detected in sera of 14% of 84 lynx. Numerous helminth ova and coccidian oocysts were found in feces, whereas T. gondii-like oocysts were not detected. Antibody prevalence increased with age class (odds ratio [OR]=4.33, 95% confidence interval [CI]=1.57-11.99, P<0.01). Antibody prevalence (14%) in our study was significantly lower than in 84 lynx (36%) trapped in the western part of the study area during winter 1997-1998 (OR=0.18, 95% CI=0.08-0.44, P<0.001). Our results suggest there may be significant spatiotemporal dynamics of T. gondii infection in lynx in Canada, and we review possible abiotic and biotic ecologic factors supporting these findings. PMID:23307370

  15. Butterfly Project Report LYNX Reference Manual

    E-print Network

    Scott, Michael L.

    Butterfly Project Report 7 LYNX Reference Manual Michael L. Scott Revised Version: August 1986 subsequently been poned to the Butterfly Parallel Proce.ssor at the University of Rochester. This manual is intended for serious users of the Butterfly implementation. At the time of its writ- ing it constitutes

  16. Microhabitat selection by Eurasian lynx and its implications for species conservation

    Microsoft Academic Search

    Tomasz Podgórski; Krzysztof Schmidt; Rafa? Kowalczyk; Agnieszka Gulczy?ska

    2008-01-01

    We studied microhabitat selection of the Eurasian lynxLynx lynx (Linnaeus, 1758) at 116 hunting and 88 resting sites in Bia?owie?a Primeval Forest (Poland) to describe its characteristics\\u000a and determine the importance of habitat structure for stalking prey and for security during resting. We identified lynx-used\\u000a sites by radio-tracking 3 male and 3 female lynx. When hunting, the lynx did not

  17. Comparative patterns of adrenal activity in captive and wild Canada lynx (Lynx canadensis).

    PubMed

    Fanson, Kerry V; Wielebnowski, Nadja C; Shenk, Tanya M; Lucas, Jeffrey R

    2012-01-01

    Stress and animal well-being are often assessed using concentrations of glucocorticoids (GCs), a product of the hypothalamic-pituitary-adrenal axis. However, GC concentrations can also be modulated by predictable events, such as changes in season or life history stage. Understanding normative patterns of adrenal activity is critical for making valid conclusions about changes in GC concentrations. In this study, we validated an assay for monitoring fecal glucocorticoid metabolites (FGM) in Canada lynx. We then used this technique to assess patterns of adrenal activity in Canada lynx across several contexts. Our results show that captive lynx have higher FGM concentrations than wild lynx, which may be related to differences in stress levels, metabolic rate, diet, or body condition. We also found that FGM concentrations are correlated with reproductive status in females, but not in males. For males, seasonal increases in FGM expression coincide with the onset of the breeding season, whereas in females, FGM increase toward the end of the breeding season. This information provides a valuable foundation for making inferences about normative versus stress-induced changes in adrenal activity in Canada lynx. PMID:21717144

  18. Fatal clostridium septicum myonecrosis in a captive canada lynx (Lynx canadensis).

    PubMed

    Izer, Jenelle M; Wilson, Ronald P; Cooper, Timothy K

    2014-09-01

    A 1-yr-old female Canada lynx (Lynx canadensis) presented for sudden onset of rapidly progressive bilateral pelvic limb paralysis. The lynx was chemically immobilized to perform a physical examination but expired shortly thereafter. On postmortem radiographs, there were myriad small irregular, round-to-spherical gas densities within the skeletal muscle of the right thigh and epaxial musculature. At gross necropsy, the muscles of the right thigh, right lateral abdominal wall, and epaxial region were emphysematous and necrohemorrhagic, with subcutaneous and muscular crepitant swelling. Multiple skin puncture wounds, consistent with bites, were present over the affected tissues. Clostridium septicum was isolated in pure anaerobic culture from the musculature of the right hind limb. Histopathologic examination confirmed the diagnosis of acute, severe necrohemorrhagic and gangrenous myositis and cellulitis. Gram stains demonstrated large gram-positive bacilli with subterminal spores. This is the first known documented case of C. septicum myonecrosis in a nondomestic felid. PMID:25314833

  19. Linking climate change to population cycles of hares and lynx.

    PubMed

    Yan, Chuan; Stenseth, Nils Chr; Krebs, Charles J; Zhang, Zhibin

    2013-11-01

    The classic 10-year population cycle of snowshoe hares (Lepus americanus, Erxleben 1777) and Canada lynx (Lynx canadensis, Kerr 1792) in the boreal forests of North America has drawn much attention from both population and community ecologists worldwide; however, the ecological mechanisms driving the 10-year cyclic dynamic pattern are not fully revealed yet. In this study, by the use of historic fur harvest data, we constructed a series of generalized additive models to study the effects of density dependence, predation, and climate (both global climate indices of North Atlantic Oscillation index (NAO), Southern Oscillation index (SOI) and northern hemispheric temperature (NHT) and local weather data including temperature, rainfall, and snow). We identified several key pathways from global and local climate to lynx with various time lags: rainfall shows a negative, and snow shows a positive effect on lynx; NHT and NAO negatively affect lynx through their positive effect on rainfall and negative effect on snow; SOI positively affects lynx through its negative effect on rainfall. Direct or delayed density dependency effects, the prey effect of hare on lynx and a 2-year delayed negative effect of lynx on hare (defined as asymmetric predation) were found. The simulated population dynamics is well fitted to the observed long-term fluctuations of hare and lynx populations. Through simulation, we find density dependency and asymmetric predation, only producing damped oscillation, are necessary but not sufficient factors in causing the observed 10-year cycles; while extrinsic climate factors are important in producing and modifying the sustained cycles. Two recent population declines of lynx (1940-1955 and after 1980) were likely caused by ongoing climate warming indirectly. Our results provide an alternative explanation to the mechanism of the 10-year cycles, and there is a need for further investigation on links between disappearance of population cycles and global warming in hare-lynx system. PMID:23846828

  20. Assessment of a recombinant F1-V fusion protein vaccine intended to protect Canada lynx (Lynx canadensis) from plague.

    PubMed

    Wolfe, Lisa L; Shenk, Tanya M; Powell, Bradford; Rocke, Tonie E

    2011-10-01

    As part of an ongoing restoration program in Colorado, USA, we evaluated adverse reactions and seroconversion in captive Canada lynx (Lynx canadensis) after vaccination with a recombinant F1-V fusion protein vaccine against Yersinia pestis, the bacterium that causes plague. Ten adult female lynx received the F1-V vaccine; 10 source- and age-matched lynx remained unvaccinated as controls. All of the vaccinated and control lynx remained apparently healthy throughout the confinement period. We observed no evidence of injection site or systemic reactions to the F1-V vaccine. Among vaccinated lynx, differences in log(10) reciprocal antibody titers measured in sera collected before and after vaccination (two doses) ranged from 1.2 to 5.2 for anti-F1 antibodies and from 0.6 to 5.2 for anti-V antibodies; titers in unvaccinated lynx did not change appreciably over the course of confinement prior to release, and thus differences in anti-F1 (P=0.003) and anti-V (P=0.0005) titers were greater among vaccinated lynx than among controls. Although our findings suggest that the F1-V fusion protein vaccine evaluated here is likely to stimulate antibody responses that may help protect Canada lynx from plague, we observed no apparent differences in survival between vaccinated and unvaccinated subject animals. Retrospectively, 22 of 50 (44%; 95% confidence interval 29-59%) unvaccinated lynx captured or recaptured in Colorado during 2000-08 had passive hemagglutination antibody titers >1:16, consistent with exposure to Y. pestis; paired pre- and postrelease titers available for eight of these animals showed titer increases similar in magnitude to those seen in response to vaccination, suggesting at least some lynx may naturally acquire immunity to plague in Colorado habitats. PMID:22102659

  1. Assessment of a recombinant F1-V fusion protein vaccine intended to protect Canada lynx (Lynx canadensis) from plague

    USGS Publications Warehouse

    Wolfe, Lisa L.; Shenk, Tanya M.; Powell, Bradford; Rocke, Tonie E.

    2011-01-01

    As part of an ongoing restoration program in Colorado, USA, we evaluated adverse reactions and seroconversion in captive Canada lynx (Lynx canadensis) after vaccination with a recombinant F1-V fusion protein vaccine against Yersinia pestis, the bacterium that causes plague. Ten adult female lynx received the F1-V vaccine; 10 source- and age-matched lynx remained unvaccinated as controls. All of the vaccinated and control lynx remained apparently healthy throughout the confinement period. We observed no evidence of injection site or systemic reactions to the F1-V vaccine. Among vaccinated lynx, differences in log10 reciprocal antibody titers measured in sera collected before and after vaccination (two doses) ranged from 1.2 to 5.2 for anti-F1 antibodies and from 0.6 to 5.2 for anti-V antibodies; titers in unvaccinated lynx did not change appreciably over the course of confinement prior to release, and thus differences in anti-F1 (P=0.003) and anti-V (P=0.0005) titers were greater among vaccinated lynx than among controls. Although our findings suggest that the F1-V fusion protein vaccine evaluated here is likely to stimulate antibody responses that may help protect Canada lynx from plague, we observed no apparent differences in survival between vaccinated and unvaccinated subject animals. Retrospectively, 22 of 50 (44%; 95% confidence interval 29–59%) unvaccinated lynx captured or recaptured in Colorado during 2000–08 had passive hemagglutination antibody titers >1:16, consistent with exposure to Y. pestis; paired pre- and postrelease titers available for eight of these animals showed titer increases similar in magnitude to those seen in response to vaccination, suggesting at least some lynx may naturally acquire immunity to plague in Colorado habitats.

  2. PowerLynx A/S PSO Projekt "Udvikling af

    E-print Network

    PowerLynx A/S PSO Projekt "Udvikling af modulær produkt platform for solcelleinvertere" Eltra-07-25 Page 2 of 204 PowerLynx A/S File: PSO Projekt 4524 afslutningsrapport - 04 KR 2006-07-25 - Final hovedrapport Filename: (Document ID, Author, revision, date): Last update: PSO Projekt 4524 afslutningsrapport

  3. Lynx: a high-resolution synthetic aperture radar

    Microsoft Academic Search

    Stan I. Tsunoda; F. Pace; J. Stence; M. Woodring; William H. Hensley; Armin W. Doerry; Bruce C. Walker

    1999-01-01

    Lynx is a high resolution, synthetic aperture radar that has been designed and built by Sandia National Laboratories in collaboration with General Atomics (GA). Although Lynx may be operated on a wide variety of manned and unmanned platforms, it is primarily intended to be fielded on unmanned aerial vehicles. In particular, it may be operated on the Predator, I-GNAT, or

  4. Forest fires and the snowshoe hare-Canada lynx cycle

    Microsoft Academic Search

    John F. Fox

    1978-01-01

    This paper shows that there is a reasonable coincidence between the Canada lynx cycle and the occurrence of forest and brush fires. Fires set in motion plant succession, potentially leading to an increase in snowshoe hares (Grange, 1965). Snowfall is also correlated with the lynx cycle and tends to account for the variation not accounted for by fires. I conclude

  5. Snow conditions may create an invisible barrier for lynx

    Microsoft Academic Search

    Nils C. Stenseth; Amir Shabbar; Kung-Sik Chan; Stan Boutin; Eli Knispel Rueness; Dorothee Ehrich; James W. Hurrell; Ole Chr. Lingjærde; Kjetill S. Jakobsen

    2004-01-01

    The dynamics of Canadian lynx (Lynx canadensis) abundance are geographically structured according to the influence of large-scale climatic regimes. Here we demonstrate that this structuring matches zones of differential snow conditions, in particular surface hardness, as determined by the frequency of winter warm spells. Through a modified functional response curve, we show that various features of the snow may influence

  6. GEOGRAPHICGRADIENTS IN DIET AFFECT POPULATION DYNAMICS OF CANADA LYNX

    Microsoft Academic Search

    James D. Roth; John D. Marshall; Dennis L. Murray; David M. Nickerson; Todd D. Steury

    2007-01-01

    Geographical gradients in the stability of cyclic populations of herbivores and their predators may relate to the degree of specialization of predators. However, such changes are usually associated with transition from specialist to generalist predator species, rather than from geographical variation in dietary breadth of specialist predators. Canada lynx (Lynx canadensis) and snowshoe hare (Lepus americanus) populations undergo cyclic fluctuations

  7. Geographical gradients in diet affect population dynamics of Canada lynx.

    PubMed

    Roth, James D; Marshall, John D; Murray, Dennis L; Nickerson, David M; Steury, Todd D

    2007-11-01

    Geographical gradients in the stability of cyclic populations of herbivores and their predators may relate to the degree of specialization of predators. However, such changes are usually associated with transition from specialist to generalist predator species, rather than from geographical variation in dietary breadth of specialist predators. Canada lynx (Lynx canadensis) and snowshoe hare (Lepus americanus) populations undergo cyclic fluctuations in northern parts of their range, but cycles are either greatly attenuated or lost altogether in the southern boreal forest where prey diversity is higher. We tested the influence of prey specialization on population cycles by measuring the stable carbon and nitrogen isotope ratios in lynx and their prey, estimating the contribution of hares to lynx diet across their range, and correlating this degree of specialization to the strength of their population cycles. Hares dominated the lynx diet across their range, but specialization on hares decreased in southern and western populations. The degree of specialization correlated with cyclic signal strength indicated by spectral analysis of lynx harvest data, but overall variability of lynx harvest (the standard deviation of natural-log-transformed harvest numbers) did not change significantly with dietary specialization. Thus, as alternative prey became more important in the lynx diet, the fluctuations became decoupled from a regular cycle but did not become less variable. Our results support the hypothesis that alternative prey decrease population cycle regularity but emphasize that such changes may be driven by dietary shifts among dominant specialist predators rather than exclusively through changes in the predator community. PMID:18051641

  8. National Interagency Canada Lynx Detection Survey in Minnesota, Wisconsin, and Michigan

    E-print Network

    Minnesota, University of

    detected included black bears (Ursus americanus), bobcats (Lynx rufus), coyotes (Canis latrans), ungulatesNational Interagency Canada Lynx Detection Survey in Minnesota, Wisconsin, and Michigan Chris Interagency Canada Lynx Detection Survey (NLDS) was a survey designed to detect lynx with a hair

  9. Assessing the suitability of central European landscapes for the reintroduction of Eurasian lynx

    Microsoft Academic Search

    STEPHANIE SCHADT; THORSTEN WIEGAND; FELIX KNAUER; PETRA KACZENSKY; URS BREITENMOSER; LUDEK BUFKA; JAROSLAV CERVENY; PETR KOUBEK; THOMAS HUBER; CVETKO STANISA; LUDWIG TREPL

    2002-01-01

    Summary 1. After an absence of almost 100 years, the Eurasian lynx Lynx lynx is slowly recover- ing in Germany along the German-Czech border. Additionally, many reintroduction schemes have been discussed, albeit controversially, for various locations. We present a habitat suitability model for lynx in Germany as a basis for further management and conservation efforts aimed at recolonization and population

  10. Lynx: A Dynamic Instrumentation System for Data-Parallel Applications on GPGPU Architectures

    E-print Network

    Eisenhauer, Greg S.

    Lynx: A Dynamic Instrumentation System for Data-Parallel Applications on GPGPU Architectures Naila the Lynx dynamic instrumentation system. Lynx provides the capability to write instrumentation routines to the applications' source code, (3) customizable, and (4) efficient. Lynx is embedded into the broader GPU Ocelot

  11. 50,000 years of genetic uniformity in the critically endangered Iberian lynx

    E-print Network

    , (L. canadensis) and the Eurasian lynx (L. lynx). All major felid lineages were established within50,000 years of genetic uniformity in the critically endangered Iberian lynx RICARDO RODRI´GUEZ,*1 lynx, including lack of mitochondrial control region variation, is thought to result from historical

  12. Historical DNA reveals the phylogenetic position of the extinct Alpine lynx

    Microsoft Academic Search

    D. Gugolz; M. V. Bernasconi; C. Breitenmoser-Würsten; P. Wandeler

    2008-01-01

    During the last two centuries, lynx populations have undergone severe declines and extinctions in Europe. The Alpine lynx, once distributed across the whole Alpine arc, became extinct due to direct human prosecution and deprivation of its main prey in the 1930s. Similar to the Iberian lynx Lynx pardinus, its taxonomy has been subject to several controversies. Moreover, knowing the taxonomic

  13. Hematologic and serum chemistry values of captive Canadian lynx.

    PubMed

    Weaver, J L; Johnson, M R

    1995-04-01

    We present baseline values for 12 hematologic and 17 serum chemistry parameters collected from 22 captive lynx (Felis lynx canadensis) in December 1992, at Ronan, Montana (USA). There were no significant differences in hematologic parameters between yearlings and adults or between sexes. Lynx originally captured in the wild had significantly higher mean (+/- SE) counts of neutrophils (7.7 +/- 0.37 x 10(3) versus 7.2 +/- 0.35 x 10(3)) and lower counts of lymphocytes (1.1 +/- 0.05 x 10(3) versus 1.6 +/- 0.08 x 10(3)) compared to lynx born and raised in captivity. Yearling lynx had significantly higher values for alkaline phosphatase than adults (51.0 +/- 6.0 IU/l versus 17.5 +/- 0.8 IU/l. PMID:8583639

  14. Proximate and ultimate causes of dispersal in the Iberian lynx Lynx pardinus

    Microsoft Academic Search

    Pablo Ferreras; Eloy Revilla; Francisco Palomares; José M. Fedriani; Javier Calzada

    2004-01-01

    Most studies on the causes of animal dispersal focus on species of birds or small mammals, but there are few such studies on solitary carnivores. A complete picture of the causes of animal dispersal is not possible without considering cases on a representative set of animals. The Iberian lynx is a medium-size, solitary carnivore that inhabits metapopulations, where dispersal plays

  15. Movement pattern and home range use by the Eurasian lynx in Bialowieza Primeval Forest (Poland)

    Microsoft Academic Search

    Wlodzimierz Jedrzejewski; Krzysztof Schmidt; Henryk Okarma; Rafal Kowalczyk

    The movement patterns of free-living lynx, Lynx lynx, were studied by radio- telemetry in Bialowieza Primeval Forest, Poland. Eighteen lynx were fitted with radio-collars and their movements were recorded by continuous 24-h sequences and daily relocations. On average, lynx moved 7.2 km per day, and males covered longer distances than females (9.0 and 6.8 km, respectively). In males, the daily

  16. Habitat Fragmentation and the Persistence of Lynx Populations in Washington State

    Microsoft Academic Search

    GARY M. KOEHLER; BENJAMIN T. MALETZKE; Large Carnivore; JEFF A. VON KIENAST; KEITH B. AUBRY; ROBERT B. WIELGUS; ROBERT H. NANEY

    Lynx (Lynx canadensis) occur in the northern counties of Washington state, USA; however, current distribution and status of lynx in Washington is poorly understood. During winters 2002-2004 we snow-tracked lynx for 155 km within a 211-km2 area in northern Washington, to develop a model of lynx-habitat relationships that we could use to assess their potential distribution and status in the

  17. Lynx: A High-Resolution Synthetic Aperture Radar

    SciTech Connect

    Doerry, A.W.; Hensley, W.H.; Pace, F.; Stence, J.; Tsunoda, S.I.; Walker, B.C.; Woodring, M.

    1999-03-08

    Lynx is a high resolution, synthetic aperture radar (SAR) that has been designed and built by Sandia National Laboratories in collaboration with General Atomics (GA). Although Lynx may be operated on a wide variety of manned and unmanned platforms, it is primarily intended to be fielded on unmanned aerial vehicles. In particular, it may be operated on the Predator, I-GNAT, or Prowler II platforms manufactured by GA Aeronautical Systems, Inc. The Lynx production weight is less than 120 lb. and has a slant range of 30 km (in 4 mm/hr rain). It has operator selectable resolution and is capable of 0.1 m resolution in spotlight mode and 0.3 m resolution in stripmap mode. In ground moving target indicator mode, the minimum detectable velocity is 6 knots with a minimum target cross-section of 10 dBsm. In coherent change detection mode, Lynx makes registered, complex image comparisons either of 0.1 m resolution (minimum) spotlight images or of 0.3 m resolution (minimum) strip images. The Lynx user interface features a view manager that allows it to pan and zoom like a video camera. Lynx was developed under corporate finding from GA and will be manufactured by GA for both military and commercial applications. The Lynx system architecture will be presented and some of its unique features will be described. Imagery at the finest resolutions in both spotlight and strip modes have been obtained and will also be presented.

  18. Feline Leukemia Virus and Other Pathogens as Important Threats to the Survival of the Critically Endangered Iberian Lynx (Lynx pardinus)

    PubMed Central

    Meli, Marina L.; Cattori, Valentino; Martínez, Fernando; López, Guillermo; Vargas, Astrid; Simón, Miguel A.; Zorrilla, Irene; Muñoz, Alvaro; Palomares, Francisco; López-Bao, Jose V.; Pastor, Josep; Tandon, Ravi; Willi, Barbara; Hofmann-Lehmann, Regina; Lutz, Hans

    2009-01-01

    Background The Iberian lynx (Lynx pardinus) is considered the most endangered felid species in the world. In order to save this species, the Spanish authorities implemented a captive breeding program recruiting lynxes from the wild. In this context, a retrospective survey on prevalence of selected feline pathogens in free-ranging lynxes was initiated. Methodology/ Principal Findings We systematically analyzed the prevalence and importance of seven viral, one protozoan (Cytauxzoon felis), and several bacterial (e.g., hemotropic mycoplasma) infections in 77 of approximately 200 remaining free-ranging Iberian lynxes of the Doñana and Sierra Morena areas, in Southern Spain, between 2003 and 2007. With the exception of feline immunodeficiency virus (FIV), evidence of infection by all tested feline pathogens was found in Iberian lynxes. Fourteen lynxes were feline leukemia virus (FeLV) provirus-positive; eleven of these were antigenemic (FeLV p27 positive). All 14 animals tested negative for other viral infections. During a six-month period in 2007, six of the provirus-positive antigenemic lynxes died. Infection with FeLV but not with other infectious agents was associated with mortality (p<0.001). Sequencing of the FeLV surface glycoprotein gene revealed a common origin for ten of the eleven samples. The ten sequences were closely related to FeLV-A/61E, originally isolated from cats in the USA. Endogenous FeLV sequences were not detected. Conclusions/Significance It was concluded that the FeLV infection most likely originated from domestic cats invading the lynx's habitats. Data available regarding the time frame, co-infections, and outcome of FeLV-infections suggest that, in contrast to the domestic cat, the FeLV strain affecting the lynxes in 2007 is highly virulent to this species. Our data argue strongly for vaccination of lynxes and domestic cats in and around lynx's habitats in order to prevent further spread of the virus as well as reduction the domestic cat population if the lynx population is to be maintained. PMID:19270739

  19. Estimation of the Iberian lynx ( Lynx pardinus ) population in the Doñana area, SW Spain, using capture–recapture analysis of camera-trapping data

    Microsoft Academic Search

    German Garrote; Ramon Perez de Ayala; Pablo Pereira; Francisco Robles; Nicolas Guzman; Francisco J. García; Maria C. Iglesias; Jaime Hervás; Iñigo Fajardo; Manuel Simón; Jose L. Barroso

    2011-01-01

    The Iberian lynx (Lynx pardinus) has a highly restricted geographic distribution, limited even within the Iberian Peninsula. The last national survey reported\\u000a less than 200 remaining individuals, distributed in two isolated areas—Andújar-Cardeña and Doñana—and in consequence, the\\u000a Iberian lynx was listed by the International Union for Conservation of Nature as “Critically Endangered”. In this study, we\\u000a estimate the Iberian lynx

  20. History and Distribution of Lynx in the Contiguous United States

    Microsoft Academic Search

    Kevin S. McKelvey; E. Beckwith; Keith B. Aubry; Yvette K. Ortega

    Abstract—Using written accounts, trapping records, and spatially referenced occurrence data, the authors reconstructed the history and distribution of lynx in the contiguous,United States from,the 1800s to the present. Records show,lynx occurrence,in 24 states. Data over,broad,scales of space,and,time show,lynx distribution,relative to topography,and,vegetation. For all three study,regions (Northeastern states, Great Lakes and North-Central states, and Western Mountain states), high frequencies of occurrence

  1. Snow conditions may create an invisible barrier for lynx.

    PubMed

    Stenseth, Nils Chr; Shabbar, Amir; Chan, Kung-Sik; Boutin, Stan; Rueness, Eli Knispel; Ehrich, Dorothee; Hurrell, James W; Lingjaerde, Ole Chr; Jakobsen, Kjetill S

    2004-07-20

    The dynamics of Canadian lynx (Lynx canadensis) abundance are geographically structured according to the influence of large-scale climatic regimes. Here we demonstrate that this structuring matches zones of differential snow conditions, in particular surface hardness, as determined by the frequency of winter warm spells. Through a modified functional response curve, we show that various features of the snow may influence lynx interaction with its main prey species, the snowshoe hare (Lepus americanus). This study highlights the importance of snow, and exemplifies how large-scale climatic fluctuations can mechanistically influence population biological patterns. PMID:15249676

  2. Hematology, serum chemistry, and body mass of free-ranging and captive Canada lynx in Minnesota.

    PubMed

    Moen, Ron; Rasmussen, James M; Burdett, Christopher L; Pelican, Katharine M

    2010-01-01

    Baseline blood chemistry data could be particularly valuable if reference values from free-ranging populations of rare or endangered species are not available. The Canada lynx (Lynx canadensis) is listed as threatened under the Endangered Species Act in the conterminous United States, even though the species is managed as a furbearer in Alaska and in most provinces of Canada. Body mass, blood chemistry, and hematologic data for free-ranging lynx were collected from 2003 to 2007 and for captive lynx from 1984 to 2007. Up to 2 yr of age, captive lynx were consistently heavier than free-ranging lynx. Body mass of adult free-ranging lynx was similar to body mass of captive adult lynx. Some differences in blood chemistry between free-ranging and captive lynx were statistically significant, but most measured values were within reference ranges for domestic cats. Free-ranging lynx had higher concentrations of aspartate aminotransferase, alanine aminotransferase, and blood urea nitrogen than did captive lynx, and these were outside the reference value ranges for domestic cats. Alkaline phosphatase and phosphorus were higher in juveniles (<12 mo when captured) as compared to adults. Free-ranging lynx maintained body mass between serial captures. Hematologic values, blood chemistry values, and body mass of free-ranging Canada lynx provide support for the hypothesis that Canada lynx in Minnesota, at the southern edge of their range, are in normal physical condition. PMID:20090014

  3. Transversus abdominis plane block for exploratory laparotomy in a Canadian lynx (Lynx canadensis).

    PubMed

    Schroeder, Carrie A; Schroeder, Kristopher M; Johnson, Rebecca A

    2010-06-01

    The transversus abdominis plane (TAP) block is an innovative regional anesthetic technique using local anesthetic that is gaining popularity in the analgesic management of human patients undergoing abdominal surgery. Needle placement in the TAP block is within the facial plane between the internal oblique and transversus abdominis muscles and involves the abdominal and thoracic nerves. Successful blockade generally involves spinal nerves T10-L1 and may induce sensory blockade as far cranially as T7, thus producing analgesia for abdominal surgery. Human studies suggest that this regional anesthetic technique may provide postoperative analgesia of the abdominal wall for up to 48 hr. Because of the extent and duration of sensory blockade, this novel technique with bupivacaine was used on a Canadian lynx (Lynx canadensis), possibly providing 8-10 hr ofintra- and postoperative analgesia concurrent to exploratory laparotomy for removal of a gastric foreign body. PMID:20597230

  4. The use of camera trapping for estimating Iberian lynx ( Lynx pardinus ) home ranges

    Microsoft Academic Search

    Jose María Gil-Sánchez; Manuel Moral; José Bueno; Javier Rodríguez-Siles; Santiago Lillo; Joaquín Pérez; Jose Manuel Martín; Gerardo Valenzuela; Germán Garrote; Bernado Torralba; Miguel Ángel Simón-Mata

    The use of non-invasive long-term monitoring data to estimate home ranges of the critically endangered Iberian lynx has been\\u000a evaluated. This programme began in 2002 and consisting of both annual latrine and camera-trap surveys, with the aims of detecting\\u000a and individually identifying the maximum number of individuals and delineating female home range boundaries. Radio-tracking\\u000a data were used to evaluate the

  5. Patterns of testicular activity in captive and wild Canada lynx (Lynx canadensis).

    PubMed

    Fanson, Kerry V; Wielebnowski, Nadja C; Shenk, Tanya M; Jakubas, Walter J; Squires, John R; Lucas, Jeffrey R

    2010-12-01

    Canada lynx are listed as a threatened species in the contiguous US. Understanding the reproductive characteristics (i.e., mating system, behavior, physiology) of a species is useful for ensuring effective in situ and ex situ management plans. The goal of this study was to describe patterns of androgen expression in both captive and wild male Canada lynx using fecal hormone metabolite analysis. Among captive lynx, juvenile and castrated males had lower concentrations of fecal androgens (fA) than intact males, thereby demonstrating that the assay detects biologically meaningful differences in testicular activity. We found that captive males in general had much higher fA levels than wild males. All males showed strong seasonal variation in fA concentrations, with significantly higher levels being expressed during the breeding season (February and March) than during the non-breeding season. Among captive males, variation in seasonal fA levels did not correlate with latitude. Finally, males housed with intact cage-mates (either male or female) had significantly higher fA levels than males housed alone or with a neutered cage-mate. PMID:20828574

  6. A new pulsating variable star in Lynx

    NASA Astrophysics Data System (ADS)

    Fiacconi, Davide; Tinelli, Luciano

    2012-02-01

    We report the discovery of a new variable star in the Lynx constellation. The star is catalogued as GSC 03409-00999 (07 33 08.6, +48 03 53.5). From analysis of the light curve we are induced to think the star may be a RRab Lyrae-type variable. We calculated the epoch HJD0 = 2455644.363 +/- 0.007 and the period P = 0.61971 +/- 0.00003 d, during which the star changes its brightness from a minimum magnitude m_min = 13.65 +/- 0.01 to a maximum one m_max = 13.11 +/- 0.01. The light curve shows the asymmetry 0.248 +/- 0.001, with a rise time tau_ RT = 0.1539 +/- 0.0007 d.

  7. Enhancement in Motor Learning through Genetic Manipulation of the Lynx1 Gene

    PubMed Central

    Miwa, Julie M.; Walz, Andreas

    2012-01-01

    The cholinergic system is a neuromodulatory neurotransmitter system involved in a variety of brain processes, including learning and memory, attention, and motor processes, among others. The influence of nicotinic acetylcholine receptors of the cholinergic system are moderated by lynx proteins, which are GPI-anchored membrane proteins forming tight associations with nicotinic receptors. Previous studies indicate lynx1 inhibits nicotinic receptor function and limits neuronal plasticity. We sought to investigate the mechanism of action of lynx1 on nicotinic receptor function, through the generation of lynx mouse models, expressing a soluble version of lynx and comparing results to the full length overexpression. Using rotarod as a test for motor learning, we found that expressing a secreted variant of lynx leads to motor learning enhancements whereas overexpression of full-length lynx had no effect. Further, adult lynx1KO mice demonstrated comparable motor learning enhancements as the soluble transgenic lines, whereas previously, aged lynx1KO mice showed performance augmentation only with nicotine treatment. From this we conclude the motor learning is more sensitive to loss of lynx function, and that the GPI anchor plays a role in the normal function of the lynx protein. In addition, our data suggests that the lynx gene plays a modulatory role in the brain during aging, and that a soluble version of lynx has potential as a tool for adjusting cholinergic-dependent plasticity and learning mechanisms in the brain. PMID:23139735

  8. Lynx web services for annotations and systems analysis of multi-gene disorders

    PubMed Central

    Sulakhe, Dinanath; Taylor, Andrew; Balasubramanian, Sandhya; Feng, Bo; Xie, Bingqing; Börnigen, Daniela; Dave, Utpal J.; Foster, Ian T.; Gilliam, T. Conrad; Maltsev, Natalia

    2014-01-01

    Lynx is a web-based integrated systems biology platform that supports annotation and analysis of experimental data and generation of weighted hypotheses on molecular mechanisms contributing to human phenotypes and disorders of interest. Lynx has integrated multiple classes of biomedical data (genomic, proteomic, pathways, phenotypic, toxicogenomic, contextual and others) from various public databases as well as manually curated data from our group and collaborators (LynxKB). Lynx provides tools for gene list enrichment analysis using multiple functional annotations and network-based gene prioritization. Lynx provides access to the integrated database and the analytical tools via REST based Web Services (http://lynx.ci.uchicago.edu/webservices.html). This comprises data retrieval services for specific functional annotations, services to search across the complete LynxKB (powered by Lucene), and services to access the analytical tools built within the Lynx platform. PMID:24948611

  9. Distribution and status of lynx in the border region between Czech Republic, Germany and Austria

    Microsoft Academic Search

    Manfred Wölfl; Lud?k Bufka; Jaroslav ?ervený; Petr Koubek; Marco Heurich; Hubertus Habel; Thomas Huber; Wilhelm Poost

    2001-01-01

    This paper summarizes available information concerning the presence of the Eurasian lynxLynx lynx Linneaus, 1758 in the Šumava Mountains and adjacent areas along the common border of Czech Republic, Germany and Austria.\\u000a Our data give an overview of the lynx population occupying the border region between the three countries from 1990 to 1999.\\u000a We estimated population size using radiotracking data.

  10. Habitat Conditions Associated With Lynx Hunting Behavior During Winter in Northern Washington

    Microsoft Academic Search

    BENJAMIN T. MALETZKE; GARY M. KOEHLER; ROBERT B. WIELGUS; KEITH B. AUBRY; MARC A. EVANS

    Effectively managing habitat for threatened populations of Canada lynx (Lynx canadensis) requires knowledge of habitat conditions that provide for the ecological needs of lynx. We snow-tracked lynx to identify habitat conditions associated with hunting behavior and predation during winters of 2002-2003 and 2003-2004 in the northern Cascade Range in Washington state, USA. We recorded number and success of predation attempts,

  11. The influence of snow on lynx and coyote movements: does morphology affect behavior?

    Microsoft Academic Search

    Dennis L. Murray; Stan Boutin

    1991-01-01

    We studied sympatric lynx (Lynx canadensis) and coyotes (Canis latrans) to assess how morphological disadvantages to locomotion over snow affected movement patterns. Both species are of similar size and mass, but the feet of lynx are much larger, and coyotes were found to have 4.1–8.8 times the foot-load (ratio of body mass to foot area) of lynx. This resulted in

  12. Spatial interactions between grey wolves and Eurasian lynx in Bia?owie?a Primeval Forest, Poland

    Microsoft Academic Search

    Krzysztof Schmidt; W?odzimierz J?drzejewski; Henryk Okarma; Rafa? Kowalczyk

    2009-01-01

    Various species of large predators are reported to influence each other through interference or exploitation competition that\\u000a may affect demography and survival of the subordinate species. We analyzed spatial relationships between grey wolf (Canis lupus) and Eurasian lynx (Lynx lynx) in Bia?owie?a Primeval Forest (BPF, eastern Poland) to determine how they partitioned the space. The wolves (n = 8) and lynx (n = 14)

  13. Modeling the reintroduction of lynx to the southern portion of its range

    Microsoft Academic Search

    Todd D. Steury; Dennis L. Murray

    2004-01-01

    We modeled populations of lynx (Lynx canadensis) and snowshoe hares (Lepus americanus) to determine prey densities required for persistence of lynx translocated to the southern portion of the species' range. The models suggested that a density of 1.1–1.8 hares\\/h is required for lynx persistence; these densities are higher than those reported for most hare populations across the USA. We found

  14. Comparative metabolism of gestagens and estrogens in the four lynx species, the Eurasian (Lynx lynx), the Iberian (L. pardinus), the Canada lynx (L. canadensis) and the bobcat (L. rufus).

    PubMed

    Dehnhard, M; Fanson, K; Frank, A; Naidenko, S V; Vargas, A; Jewgenow, K

    2010-06-01

    With the increasing prevalence of faecal hormone metabolite analysis, it is important to develop a better understanding of the dynamics of faecal metabolite composition. The aim of this study was to compare the quantitative faecal gestagen and estrogen metabolite composition in the four lynx species: Eurasian lynx, Iberian lynx, Canada lynx and bobcats. Comparative HPLC immunograms were generated from faecal samples collected before, during, and after pregnancy from individual females of each lynx species. Gestagens and estrogens revealed three similar classes of immunoreactive faecal metabolites: (1) polar metabolites which were enzyme-hydrolysable and thus may be designated as conjugates, (2) non-hydrolysable polar metabolites, and (3) non-polar metabolites or free steroids. For both hormones, strong similarities in the HPLC immunograms across species suggests that steroid metabolism is relatively conserved among Lynx species. Gestagens were primarily excreted as polar conjugates or unknown metabolites, whereas estrogen metabolism revealed a huge proportion (approximately 50%) consisting of 17beta-estradiol and estrone. These results are consistent with patterns of steroid metabolism in other felid species. Only two minor species-specific patterns emerged. In bobcats, we observed an exceptionally high proportion of gestagen conjugates, and in Iberian lynx, there was an exceptionally high proportion of estrone. The comparison of HPLC immunograms within individuals revealed that intra-individual variations in steroid metabolite composition are considerably high. However, changes in metabolite composition did not correlate with specific reproductive stages; rather, they seemed to occur at random. We assume that these differences may reflect changes in liver metabolism and/or qualitative and quantitative variations in gut bacteria composition, resulting in differences in faecal metabolite composition. PMID:20346945

  15. HABITAT SELECTION AND POPULATION ECOLOGY OF BOBCATS (LYNX RUFUS) IN SOUTH DAKOTA, USA

    E-print Network

    HABITAT SELECTION AND POPULATION ECOLOGY OF BOBCATS (LYNX RUFUS) IN SOUTH DAKOTA, USA BY CORY E Abstract HABITAT SELECTION AND POPULATION ECOLOGY OF BOBCATS (LYNX RUFUS) IN SOUTH DAKOTA, USA Cory E. Mosby 2011 The bobcat (Lynx rufus) is native to much of the United States, including South Dakota where

  16. The use of sighting data to analyse Iberian lynx habitat and distribution

    Microsoft Academic Search

    Luis Palma; Pedro Beja; Miguel Rodrigues

    1999-01-01

    Summary 1. Over a large part of its very restricted and fragmented range, Iberian lynx Lynx pardinus occur in remote mountainous country at low density, where the only information about the species comprises records of incidental sightings obtained by inquiry. In this study we developed an approach for quantifying lynx-habitat relationships and distribution patterns from sighting data, using records from

  17. Snowtrack surveys for Canada lynx presence in Minnesota west of Highway 53 2005 Annual Report

    E-print Network

    Minnesota, University of

    Snowtrack surveys for Canada lynx presence in Minnesota west of Highway 53 2005 Annual Report on this topic #12;ii Summary Historical and recent Canada lynx sighting reports have been concentrated in northeastern Minnesota, with scattered reports from other parts of the state. Lynx that have been radiocollared

  18. Iberian Lynx in a Fragmented Landscape: Predispersal, Dispersal, and Postdispersal Habitats

    Microsoft Academic Search

    F. Palomares; M. Delibes; P. Ferreras; J. M. Fedriani; J. Calzada; E. Revilla

    2000-01-01

    Applied conservation biology must provide solutions for the conservation of species in modern landscapes, where prime habitats are being continuously fragmented and altered and animals are restricted to small, nonviable populations. We studied habitat selection in a fragmented population of endangered Ibe- rian lynx ( Lynx pardinus ) by examining 14 years of radiotracking data obtained from lynx trapped in

  19. The effect of removing lynx in reducing attacks on sheep in the French Jura Mountains

    Microsoft Academic Search

    P Stahl; J. M Vandel; V Herrenschmidt; P Migot

    2001-01-01

    The selective removal of carnivores from local areas is sometimes proposed to reduce the number of attacks on livestock. For the lynx, neither the existence of problem individuals nor the efficacy of their selective removal has been demonstrated. In France, from 1989 to 1999, eight lynx and two large carnivores thought to be lynx were legally removed from high conflict

  20. Fragmented landscapes, road mortality and patch connectivity: modelling influences on the dispersal of Eurasian lynx

    Microsoft Academic Search

    STEPHANIE KRAMER-SCHADT; ELOY REVILLA; THORSTEN WIEGAND; URS BREITENMOSER

    2004-01-01

    Summary 1. Although many reintroduction schemes for the Eurasian lynx Lynx lynx in Germany have been discussed, the implications of connectivity between suitable patches have not been assessed. 2. We introduce an individual-based, spatially explicit dispersal model to assess the probability of a dispersing animal reaching another suitable patch in the complex heterogeneous German landscape, with its dense transport system.

  1. From Patterns to Processes: Phase and Density Dependencies in the Canadian Lynx Cycle

    Microsoft Academic Search

    Nils C. Stenseth; Wilhelm Falck; Kung-Sik Chan; Ottar N. Bjornstad; Mark O'Donoghue; Howell Tong; Rudy Boonstra; Stan Boutin; Charles J. Krebs; Nigel G. Yoccoz

    1998-01-01

    Across the boreal forest of North America, lynx populations undergo 10-year cycles. Analysis of 21 time series from 1821 to the present demonstrates that these fluctuations are generated by nonlinear processes with regulatory delays. Trophic interactions between lynx and hares cause delayed density-dependent regulation of lynx population growth. The nonlinearity, in contrast, appears to arise from phase dependencies in hunting

  2. Using Scent-Marking Stations to Collect Hair Samples to Monitor Eurasian Lynx Populations

    Microsoft Academic Search

    KRZYSZTOF SCHMIDT; RAFA? KOWALCZYK

    2006-01-01

    Noninvasive sampling of mammalian hairs for surveying their populations and for providing density estimations is widely applicable in wildlife ecology and management. However, the efficiency of the method may differ depending on the species or local circumstances. We modified a method of hair trapping from free-ranging Eurasian lynx (Lynx lynx) to collect DNA samples to work in a low-density population.

  3. TREE vol. 14, no. 11 November 1999 0169-5347/99/$ see front matter 1999 Elsevier Science Ltd. All rights reserved. PII: S0169-5347(99)01717-6 417 The Canadian lynx (Lynx canadensis),

    E-print Network

    Lloyd, Alun

    . All rights reserved. PII: S0169-5347(99)01717-6 417 The Canadian lynx (Lynx canadensis), with its distant regions are synchronized. Elton's work on the lynx, together with studies of similar oscillations of the cycles. Al- though the period of oscillations in lynx numbers shows little variability about its mean

  4. Ecological factors influencing the spatial pattern of Canada lynx relative to its southern range edge in Alberta, Canada

    Microsoft Academic Search

    Erin M. Bayne; Stan Boutin; Richard A. Moses

    2008-01-01

    We examined the spatial pattern of Canada lynx (Lynx canadensis Kerr, 1792) relative to its southern range edge at the boreal plains - prairie ecotone in Alberta, Canada. Relative to the original distribution of boreal forest in our study area, lynx range seems to have contracted up to 22%. In 100 km2 sampling areas, lynx occupancy rate increased 1.93 times

  5. Combining resource selection and movement behavior to predict corridors for Canada lynx at their southern range periphery

    E-print Network

    Hebblewhite, Mark

    Lynx canadensis is a federally threatened bor- eal species that may require connectivity with northern of anthropogenic disturbance (Channell and Lomolino, 2000; Schaefer, 2003). Canada lynx (Lynx canadensis), listedCombining resource selection and movement behavior to predict corridors for Canada lynx

  6. DNA reveals high dispersal synchronizing the population dynamics of Canada lynx.

    PubMed

    Schwartz, Michael K; Mills, L Scott; McKelvey, Kevin S; Ruggiero, Leonard F; Allendorf, Fred W

    2002-01-31

    Population dynamics of Canada lynx (Lynx canadensis) have been of interest to ecologists for nearly sixty years. Two competing hypotheses concerning lynx population dynamics and large-scale spatial synchrony are currently debated. The first suggests that dispersal is substantial among lynx populations, and the second proposes that lynx at the periphery of their range exist in small, isolated patches that maintain cycle synchrony via correlation with extrinsic environmental factors. Resolving the nature of lynx population dynamics and dispersal is important both to ecological theory and to the conservation of threatened lynx populations: the lack of knowledge about connectivity between populations at the southern periphery of the lynx's geographic range delayed their legal listing in the United States. We test these competing hypotheses using microsatellite DNA markers and lynx samples from 17 collection sites in the core and periphery of the lynx's geographic range. Here we show high gene flow despite separation by distances greater than 3,100 km, supporting the dispersal hypothesis. We therefore suggest that management actions in the contiguous United States should focus on maintaining connectivity with the core of the lynx's geographic range. PMID:11823858

  7. Fatal Neonatal Toxoplasmosis in a Bobcat (Lynx rufus)

    Microsoft Academic Search

    J. P. Dube; W. J. Quinn; D. Weinandy

    Toxoplasma gondii was found in tissues of a captive 1-week-old bobcat (Lynx rufus) that died of myocarditis, hepatitis and encephalitis. Although infection is common in wild Felidae, clinical toxoplasmosis is rarely seen. In this case, the infection was apparently con- genitally acquired.

  8. Predicting favorable habitat for bobcats (Lynx rufus) in Iowa

    Microsoft Academic Search

    Stephanie Ann Linde

    2010-01-01

    Bobcats (Lynx rufus), once common in the prairie-woodland mosaic of the Midwest, were largely extirpated from the Corn Belt region by 1900. In the 1990's, sightings of bobcats in Iowa began to increase, and they are now abundant in southern Iowa. With the dramatic expansion of rowcrop agriculture resulting in loss of habitat, wildlife managers do not know whether bobcats

  9. Statewide modeling of bobcat, Lynx rufus, habitat in Illinois, USA

    Microsoft Academic Search

    Alan Woolf; Clayton K. Nielsen; Theodore Weber; Tara J. Gibbs-Kieninger

    2002-01-01

    We used sighting location and remotely sensed habitat data, multivariate statistical techniques, and a geographic information system to model bobcat (Lynx rufus) habitat in Illinois, thereby providing state wildlife managers with information to review the listing of bobcats as a state-threatened species and contribute to the development of a statewide management plan. We used canonical discriminant function analysis to model

  10. Fatal neonatal toxoplasmosis in a bobcat (Lynx rufus).

    PubMed

    Dubey, J P; Quinn, W J; Weinandy, D

    1987-04-01

    Toxoplasma gondii was found in tissues of a captive 1-week-old bobcat (Lynx rufus) that died of myocarditis, hepatitis and encephalitis. Although infection is common in wild Felidae, clinical toxoplasmosis is rarely seen. In this case, the infection was apparently congenitally acquired. PMID:3586212

  11. The Lynx Distributed Programming Language: Motivation, Design and Experience

    Microsoft Academic Search

    Michael L. Scott

    1991-01-01

    A programming language can provide much better support for interprocess communication than a library package can. Most message-passing languages limit this support to communication between the pieces of a single program, but this need not be the case. Lynx facilitates convenient, typesafe message passing not only within applications, but also between applications and among distributed collections of servers. Specifically, it

  12. Nuutuuyiglu Tuttuglu (The Lynx and the Two Caribou).

    ERIC Educational Resources Information Center

    Pope, Mary L.; And Others

    This second grade elementary language text, designed for children in bilingual Inupiat-English programs in Ambler, Kobuk, Kiana, Noorvik, and Shungnak, contains a story about a lynx who tries to kill two caribou at one time but who is himself killed. Each page of text is illustrated with a black-and-white drawing. The English equivalent is given…

  13. Recent and historical distributions of Canada lynx in Maine and the Northeast

    USGS Publications Warehouse

    Hoving, C.L.; Joseph, R.A.; Krohn, W.B.

    2003-01-01

    The contiguous United States population of Canada lynx (Lynx canadensis Kerr) is listed as threatened under the federal Endangered Species Act. However, the historic distribution of lynx in the Northeast is poorly understood. We used museum records, bibliographic records, and interviews to reconstruct the past distribution of lynx in Maine, which is at the current southern limit of the species' distribution in the eastern United States. We found a total of 118 records, representing at least 509 lynx in Maine. Lynx were observed throughout Maine, 1833-1912, with the exception of coastal areas. After 1913, lynx were most common in the forests of western and northern Maine, and absent to rare along the coast, but had not returned to southern Maine by 1999. Thirty-nine kittens representing at least 21 litters were distributed throughout northern and western Maine, 1864-1999. Populations apparently fluctuated, and in some years 200-300 lynx were harvested in Maine. Prior to the 1900s, lynx were much more widely distributed in the Northeast, ranging from Pennsylvania north into Quebec. Because Canada lynx have had a long presence in northern New England, and at times were relatively common, this species merits serious consideration in conservation planning in this region.

  14. Stress and reproductive physiology in Canada lynx (Lynx canadensis): Implications for in-situ and ex-situ conservation

    Microsoft Academic Search

    Kerry V. Petterson Fanson

    2009-01-01

    Species reintroductions are a valuable conservation tool, but such efforts often fail, and we have a poor understanding of why. Understanding the role of stress physiology in reintroductions may be critical for enhancing their success rates. The goal of my dissertation was to validate a technique for monitoring stress and reproductive physiology in Canada lynx, and apply this technique to

  15. Behavioural and spatial adaptation of the Eurasian lynx to a decline in prey availability

    Microsoft Academic Search

    Krzysztof Schmidt

    2008-01-01

    The distribution and abundance of food resources is a major factor influencing animal populations. I studied the effect of\\u000a a roe and red deer population decline on diet composition, home range size and foraging pattern in the Eurasian lynxLynx lynx (Linnaeus, 1758) in the Bia?owie?a Primeval Forest (BPF), eastern Poland. The population of cervids in BPF experienced a\\u000a nearly two-fold

  16. DEFINING SPACE USE AND MOVEMENTS OF CANADA LYNX WITH GLOBAL POSITIONING SYSTEM TELEMETRY

    Microsoft Academic Search

    Christopher L. Burdett; Ron A. Moen; Gerald J. Niemi; L. David Mech

    2007-01-01

    Space use and movements of Canada lynx (Lynx canadensis) are difficult to study with very-high-frequency radiocollars. We deployed global positioning system (GPS) collars on 11 lynx in Minnesota to study their seasonal space-use patterns. We estimated home ranges with minimum-convex-polygon and fixed-kernel methods and estimated core areas with area\\/probability curves. Fixed-kernel home ranges of males (range ¼ 29-522 km2) were

  17. Genetic structure of the Eurasian lynx population in north-eastern Poland and the Baltic states

    Microsoft Academic Search

    Krzysztof Schmidt; Rafa? Kowalczyk; Janis Ozolins; Peep Männil; Joerns Fickel

    2009-01-01

    We analyzed the genotypes of Eurasian lynx (Lynx lynx) from three populations in the westernmost part of the species main range. One population was situated at the distribution\\u000a edge (NE Poland) and the two other (Latvia and Estonia) were located within the main, contiguous range of the species. The\\u000a aim was to determine if the genetic composition varied among these

  18. Population cycles and changes in body size of the lynx in Alaska

    Microsoft Academic Search

    Yoram Yom-Tov; Shlomith Yom-Tov; Dusty MacDonald; Elad Yom-Tov

    2007-01-01

    The lynx Lynx canadensis is a common predator in the boreal forests of North America. Its population fluctuates during a 9- to 11-year cycle in synchrony\\u000a with the population size of its main prey, the snowshoe hare Lepus americanus. Using adult museum specimens, we studied changes in skull (and hence body) size of the lynx in Alaska during the second

  19. Interlinking hare and lynx dynamics using a century’s worth of annual data

    Microsoft Academic Search

    Jon Olav Vik; Christian N. Brinch; Stan Boutin; Nils Christian Stenseth

    2008-01-01

    The classic fur trade records on Canadian lynx (Lynx canadensis) have rarely been analysed in direct conjunction with data on its principal prey, the snowshoe hare (Lepus americanus). Comparable long-term data for hare exist only for a region south of Hudson Bay. We fitted a bivariate log-linear time-series\\u000a model to this hare and lynx data to disentangle the within- and

  20. Performance analysis and kernel size study of the Lynx real-time operating system

    NASA Technical Reports Server (NTRS)

    Liu, Yuan-Kwei; Gibson, James S.; Fernquist, Alan R.

    1993-01-01

    This paper analyzes the Lynx real-time operating system (LynxOS), which has been selected as the operating system for the Space Station Freedom Data Management System (DMS). The features of LynxOS are compared to other Unix-based operating system (OS). The tools for measuring the performance of LynxOS, which include a high-speed digital timer/counter board, a device driver program, and an application program, are analyzed. The timings for interrupt response, process creation and deletion, threads, semaphores, shared memory, and signals are measured. The memory size of the DMS Embedded Data Processor (EDP) is limited. Besides, virtual memory is not suitable for real-time applications because page swap timing may not be deterministic. Therefore, the DMS software, including LynxOS, has to fit in the main memory of an EDP. To reduce the LynxOS kernel size, the following steps are taken: analyzing the factors that influence the kernel size; identifying the modules of LynxOS that may not be needed in an EDP; adjusting the system parameters of LynxOS; reconfiguring the device drivers used in the LynxOS; and analyzing the symbol table. The reductions in kernel disk size, kernel memory size and total kernel size reduction from each step mentioned above are listed and analyzed.

  1. Small passenger car transmission test: Mercury Lynx ATX transmission

    SciTech Connect

    Bujold, M P

    1981-09-01

    The small passenger car transmission test was initiated to supply electric vehicle manufacturers with technical information regarding the performance of commercially available transmissions. This information would enable EV manufacturers to design a more energy efficient vehicle. With this information the manufacturers would be able to estimate vehicle driving range as well as speed and torque requirements for specific road load performance characteristics. This report covers the 1981 Mercury Lynx ATX transaxle. This transmission was tested per a passenger car automatic transmission test code (SAE J65lb) which required drive performance, coast performance, and no load test conditions. Under these test conditions the transmission attained maximum efficiencies in the 93% range for drive performance tests. The major results of this test are the torque, speed and efficiency curves which are located in the data section of this report. These graphs map performance characteristics for the Mercury Lynx ATX transmission.

  2. Lynx maritime radar in USN experiment Trident Warrior 2011

    NASA Astrophysics Data System (ADS)

    Dunkel, R.; Link, Z.; Verge, T.; Laue, J.

    2012-06-01

    General Atomics Aeronautical Systems Inc. (GA-ASI) participated in the joint naval experiment Trident Warrior 2011 at Combat Direction Systems Activity (CDSA), Dam Neck, Va., in July 2011. The goal was to introduce the Lynx® Multi-Mode Radar's new Maritime Wide Area Search (MWAS) mode and display a viable Unmanned Aircraft System (UAS) full kill chain solution for the naval environment. GA-ASI presented a manned platform, a Beechcraft Super King Air 200 modified with an operators console, Lynx Multi-mode Radar, FLIR Star SAFIRE 380-HD EO/IR camera system, and an L-3 TCDL (aircraft data link system) as a surrogate for the Predator® B/ MQ-9 UAS.

  3. CAUSES OF MORTALITY IN REINTRODUCED EURASIAN LYNX IN SWITZERLAND

    Microsoft Academic Search

    Heike Schmidt-Posthaus; Christine Breitenmoser-Wursten; Horst Posthaus; Luca Bacciarini; Urs Breitenmoser

    Seventy-two lynx, found dead in the Swiss Alps and the Jura Mountains (Switzerland) from 1987-99, were evaluated to determine the cause of death. Seventy-two per cent (52\\/72) of all animals died because of noninfectious diseases or causes such as vehicular collision and poach- ing. Eighteen percent (13\\/72) died from infectious diseases, including some which could have been transferred to the

  4. A new species, Toxocara lyncis, in the caracal (Lynx caracal).

    PubMed

    Macchioni, G

    1999-12-01

    Toxocara lyncis, sp. n. is described from Lynx caracal in Somalia. It most closely resembles T. cati, the only species of Toxocara reported from L. caracal. It differs from T. cati in the comparative length of the spicules and the esophagus, and in the shape of the cervical alae. Cervical alae have a nearly uniform width along their length in T. lyncis, while they are narrow anteriorly and broad posteriorly forming an arrow head shaped cephalic end in T. cati. PMID:10870554

  5. Influence of Age, Sex and Time of Year on Diet of the Bobcat (Lynx rufus) in Pennsylvania

    E-print Network

    McCay, Timothy S.

    Influence of Age, Sex and Time of Year on Diet of the Bobcat (Lynx rufus) in Pennsylvania ABSTRACT.--Diet of the bobcat (Lynx rufus) in the mid-Atlantic region of the United States is poorly known. Age, sex and time decrease the bobcat's ability to travel and hunt effectively. INTRODUCTION The diet of the bobcat (Lynx

  6. RWU 4201 Wildlife Ecology in Rocky Mountain Landscapes Using DNA to Determine the Presence of Lynx and

    E-print Network

    RWU 4201 Wildlife Ecology in Rocky Mountain Landscapes Using DNA to Determine the Presence of Lynx and Identify Hybridization Between Lynx and Bobcats Michael K. Schwartz, Ecologist, RMRS, Box 8089 Missoula, MT, Missoula, MT 59807 (406)542-4160, lruggiero@fs.fed.us Problem Statement Canada lynx were listed

  7. Pleistocene and ecological effects on continental-scale genetic differentiation in the bobcat (Lynx rufus)

    E-print Network

    Bronikowski, Anne

    of genetic structure. Keywords: bobcat, landscape genetics, Lynx rufus, phylogeography, Pleistocene, suturePleistocene and ecological effects on continental-scale genetic differentiation in the bobcat (Lynx rufus) DAWN M. REDING,* ANNE M. BRONIKOWSKI,* WARREN E. JOHNSON and WILLIAM R. CLARK* *Department

  8. Landscape structure and asymmetrical inter-patch connectivity in a metapopulation of the endangered Iberian lynx

    Microsoft Academic Search

    P. Ferreras

    2001-01-01

    Among the factors threatening the Iberian lynx, (Lynx pardinus) (the most endangered species of all the Felidae), loss and fragmentation of its habitats are probably the most important. Connectivity between the remaining populations in the predominantly fragmented landscapes is a key factor in the dynamics and persistence of metapopulations. Based on the data collected during a long-term study on the

  9. Lynx reintroductions in fragmented landscapes of Germany: Projects with a future or misunderstood wildlife conservation?

    Microsoft Academic Search

    Stephanie Kramer-Schadt; Eloy Revilla; Thorsten Wiegand

    2005-01-01

    Eurasian lynx are slowly recovering in Germany after an absence of about 100 years, and additional reintroduction programs have been launched. However, suitable habitat is patchily distributed in Germany, and whether patches could host a viable population or contribute to the potential spread of lynx is uncertain. We combined demographic scenarios with a spatially explicit population simulation model to evaluate

  10. GIS-BASED MODEL TO SUPPORT PROGRAMMATIC SECTION 7 CONSULTATIONS ON THE CANADA LYNX IN COLORADO

    Microsoft Academic Search

    Roland Wostl; Patrick Wright

    2001-01-01

    Project Period: February 15, 2001 - September 15, 2001 The Colorado Department of Transportation (CDOT), on behalf of the Federal Highway Administration (FHWA), is in the process of conducting programmatic section 7 consultations on the Canada lynx. CDOT divided Colorado into eight consultation units where lynx habitat and highways intersect. A programmatic is nearing completion for one of the units;

  11. Lynx: A Programmatic SAT Solver for the RNA-Folding Problem

    E-print Network

    Gifford, David K.

    Lynx: A Programmatic SAT Solver for the RNA-Folding Problem Vijay Ganesh1 , Charles W. O'Donnell1@srlabs.de Abstract. This paper introduces Lynx, an incremental programmatic SAT solver that allows non-expert users to introduce domain-specific code into modern conflict-driven clause-learning (CDCL) SAT solvers, thus enabling

  12. Habitat and road use by Canada lynx making long-distance movements Ron Moen, Ph.D. and Lauren Terwilliger, M.A.

    E-print Network

    Netoff, Theoden

    Habitat and road use by Canada lynx making long-distance movements Ron Moen, Ph.D. and Lauren If corrections are made to this Technical Report they will be posted at www.nrri.umn.edu\\lynx 40 0 40 80 Miles Superior National Forest Lake Superior Lynx trails as colored lines BWCAW Quetico #12;Canada Lynx Long

  13. Age, sex, reproduction, and spatial organization of lynxes colonizing northeastern Minnesota

    USGS Publications Warehouse

    Mech, L.D.

    1980-01-01

    From 1972 through 1978, lynxes (Felis lynx) emigrating from Canada were studied in northeastern Minnesota. Fourteen individuals were radio-tracked, 8 wefe ear-tagged, and 49 carcasses were examined. Sex ratios of the samples were equal during the first years of the study, but females predominated later. At least half of the radiotagged lynxes were killed by humans; no natural mortality was detected. Home range sizes ranged from 51 to 122 km2 for females and 145 to 243 km2 for males, up to 10 times the sizes of those reported by other workers. Ranges of females tended to overlap. Males and females appeared to be segregated in the population.

  14. Surgical plating of a fractured radius and ulna in a wild Canada lynx.

    PubMed

    Poole, K G; Elkin, B T; Pisz, T; Elkin, K E; Robertson, D; Sabourin, M L

    1998-04-01

    A free-ranging, adult male Canada-lynx (Lynx canadensis) experienced a closed, complete, non-comminuted transverse fracture of the left radius and ulna when captured in a leg snare. A dynamic compression plate (DCP) attached to the anterior surface of the radius was used to stabilize the fracture. Radiographs 44 days post-surgery indicated advanced primary bone healing. The lynx was released 46 days post-surgery near the site of capture. Radiotelemetry indicated long-term survival and movements similar to other males monitored during the same period. PMID:9577786

  15. Initial results from a ROSAT deep survey in Lynx

    NASA Technical Reports Server (NTRS)

    Anderson, S. F.; Windhorst, R. A.; Maccacaro, T.; Burstein, D.; Franklin, B. E.; Griffiths, R. E.; Koo, D. C.; Mathis, D. F.; Morgan, W. A.; Neuschaefer, L. W.

    1992-01-01

    Preliminary results from a deep (70 ksec) Rosat survey of the high galactic latitude selected area Lynx.3A are presented. Lynx.3A sensitivity was previously studied in both the optical radio, with deep Westerbork surveys and deep multicolor Charge Couple Device (CCD) images form the Palomar 200 inch Four-Shooter. About 70 x-ray sources were detected within the central 40 foot diameter region of the Position Sensitive Proportional Counter (PSPC), observed surface densities of approximately 200 x-ray sources/sq deg are suggested, and these x-ray sources alone account for approximately 30 percent of the cosmic x-ray background (0.9 to 2.2 keV). An initial look at the observed x-ray logN - logS curve is presented, but a detailed assessment requires further study. The 4 sigma limit of about 7 times 10 to the minus 15th power erg/s.sq cm (0.5 to 2.0 keV) is considerably deeper then the Einstein deep surveys, and of comparable sensitivity to the deepest current Rosat surveys. Cross correlation with our Four Shooter optical catalogs yields at least one likely optical candidate for nearly all of the Rosat x-ray sources; a number of the likely optical identifications have colors of quasi-stellar objects (and stellar PSF), but in other cases galaxies/groups are also viable candidates.

  16. Lynx Mobile Mapper for Surveying City Centers and Highways

    NASA Astrophysics Data System (ADS)

    Conforti, D.; Zampa, F.

    2011-09-01

    In the last two years the Lynx Mobile Mapper has become the new lidar solution developed for surveying large areas that are impractical with static lidar sensors and require an accuracy and resolution that exceed airborne technologies. The system allows the scanning at a speed up to 100 km/h, obtaining accuracy better than 5 cm with an up to 7 mm resolution. Therefore, this solution proves to be an excellent tool for surveying city centers, highways, railways, thanks also to a very fast, safe and accurate data collection. This paper will present two applications: 1- The survey of the entire ancient city center of Brescia (Italy) with it medieval castle, the narrows streets and the main squares. It also has been run a test to survey with the Lynx the tunnel that go underneath the castle and compare the result with a static laser scanner survey, 2- The survey of the Calatrava Bridge on the A1 highway. The central bridge, which crosses over the high-speed rail line and the A1 motorway is composed as a single symmetrical arch, placed longitudinally, which rises to a height of 46m. During the survey the two A1 motorway carriageways have been scanned and the upper part of the bridge for a complete 3D model of this structure.

  17. HELICOBACTER-LIKE ORGANISMS IN GASTRIC MUCOSA OF BOBCATS (LYNX RUFUS) AND GREY FOXES (UROCYON CINEREOARGENTEUS)

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Microscopic examination of gastric mucosa of raccoons (Procyon lotor), porcupines (Erethizon dorsatum), gray foxes (Urocyon cinereoargenteus), bobcats (Lynx rufus), skunks (Mephitis mephitis), and black bears (Ursus amaricanus) was done on archival tissue blocks for evidence of Helicobacter-like org...

  18. Modelling the Canada lynx and snowshoe hare population cycle: the role of specialist predators

    Microsoft Academic Search

    Rebecca Tyson; Sheena Haines; Karen E. Hodges

    2010-01-01

    Mathematical models of the snowshoe hare (Lepus americanus) and Canada lynx (Lynx canadensis) population cycles in the boreal forest have largely focused on the interaction between a single specialist predator and\\u000a its prey. Here, we consider the role that other hare predators play in shaping the cycles, using a predator–prey model for\\u000a up to three separate specialist predators. We consider

  19. Lynx® midurethral sling system: a 1-year prospective study on efficacy and safety

    Microsoft Academic Search

    Karen L. Noblett; Betty Shen

    2008-01-01

    The objective of this study is to determine the outcomes for the Lynx® midurethral sling system in the treatment of urodynamic\\u000a stress incontinence (USI). Prospective study of 118 subjects who underwent a Lynx® midurethral sling procedure for USI. Subjects\\u000a were considered cured if they were subjectively dry by history and objectively dry by standing stress test. Intraoperative\\u000a and postoperative complications

  20. Evidence for large-scale effects of competition: niche displacement in Canada lynx and bobcat.

    PubMed

    Peers, Michael J L; Thornton, Daniel H; Murray, Dennis L

    2013-12-22

    Determining the patterns, causes and consequences of character displacement is central to our understanding of competition in ecological communities. However, the majority of competition research has occurred over small spatial extents or focused on fine-scale differences in morphology or behaviour. The effects of competition on broad-scale distribution and niche characteristics of species remain poorly understood but critically important. Using range-wide species distribution models, we evaluated whether Canada lynx (Lynx canadensis) or bobcat (Lynx rufus) were displaced in regions of sympatry. Consistent with our prediction, we found that lynx niches were less similar to those of bobcat in areas of sympatry versus allopatry, with a stronger reliance on snow cover driving lynx niche divergence in the sympatric zone. By contrast, bobcat increased niche breadth in zones of sympatry, and bobcat niches were equally similar to those of lynx in zones of sympatry and allopatry. These findings suggest that competitively disadvantaged species avoid competition at large scales by restricting their niche to highly suitable conditions, while superior competitors expand the diversity of environments used. Our results indicate that competition can manifest within climatic niche space across species' ranges, highlighting the importance of biotic interactions occurring at large spatial scales on niche dynamics. PMID:24174116

  1. Evidence for large-scale effects of competition: niche displacement in Canada lynx and bobcat

    PubMed Central

    Peers, Michael J. L.; Thornton, Daniel H.; Murray, Dennis L.

    2013-01-01

    Determining the patterns, causes and consequences of character displacement is central to our understanding of competition in ecological communities. However, the majority of competition research has occurred over small spatial extents or focused on fine-scale differences in morphology or behaviour. The effects of competition on broad-scale distribution and niche characteristics of species remain poorly understood but critically important. Using range-wide species distribution models, we evaluated whether Canada lynx (Lynx canadensis) or bobcat (Lynx rufus) were displaced in regions of sympatry. Consistent with our prediction, we found that lynx niches were less similar to those of bobcat in areas of sympatry versus allopatry, with a stronger reliance on snow cover driving lynx niche divergence in the sympatric zone. By contrast, bobcat increased niche breadth in zones of sympatry, and bobcat niches were equally similar to those of lynx in zones of sympatry and allopatry. These findings suggest that competitively disadvantaged species avoid competition at large scales by restricting their niche to highly suitable conditions, while superior competitors expand the diversity of environments used. Our results indicate that competition can manifest within climatic niche space across species’ ranges, highlighting the importance of biotic interactions occurring at large spatial scales on niche dynamics. PMID:24174116

  2. Factors affecting hare?lynx dynamics in the classic time series of the Hudson Bay Company, Canada

    Microsoft Academic Search

    Zhibin Zhang; Yi Tao; Zhenqing Li

    2007-01-01

    The 10 yr hare-lynx (Lepus ameri- canus-Lynx canadensis) cycles in boreal forest of North America have been well known for >100 yr, but the underlying mechanism is still not fully un- derstood. Prey-predator interactions are generally thought to be the major causative factor for the cycle. The effect of climate on the hare-lynx cycle has been largely ignored. By using

  3. Reproduction and pre-dispersal survival of Iberian lynx in a subpopulation of the Doñana National Park

    Microsoft Academic Search

    Francisco Palomares; Eloy Revilla; Javier Calzada; Nestor Fernández; Miguel Delibes

    2005-01-01

    Little is known about the reproduction of the Iberian lynx (Lynx pardinus) even though it is the most endangered felid in the world. We studied during 9 years several reproductive parameters of the Iberian lynx in one of the subpopulations situated in Doñana National Park (south-western Spain), by means of radio-tracking, direct observations and photo-trapping. The potential breeding subpopulation was

  4. Fatal cytauxzoonosis in a free-ranging bobcat (Lynx rufus).

    PubMed

    Nietfeld, Jerome C; Pollock, Christal

    2002-07-01

    In September 2000, a free-ranging bobcat (Lynx rufus) cub was presented to the Kansas State University Veterinary Teaching Hospital (Manhattan, Kansas, USA) in a moribund state with signs of severe anemia and respiratory difficulty. The cub was euthanized. Gross necropsy findings included multifocal atelectasis, splenomegaly, and pericardial effusion. Microscopic examination revealed subacute pulmonary thrombosis, mild vasculitis in the brain, and large schizont-filled macrophages within blood vessels of all tissues examined. The organisms were typical of the developmental stages of Cytauxzoon felis. Cytauxzoonosis is considered to be a persistent, subclinical infection in the bobcat; however, this cub had lesions consistent with those seen in fatal infections in domestic cats. This case of fatal C. felis infection indicates that some free-ranging bobcats may die of cytauxzoonosis. PMID:12238380

  5. Embryo transfer and embryonic capsules in the bobcat (Lynx rufus).

    PubMed

    Miller, D L; Waldhalm, S J; Leopold, B D; Estill, C

    2002-04-01

    Bobcats (Lynx rufus) (n=22) were used to test a surgical embryo transfer protocol for wild felines. Five blastocysts were collected 8-14 days post-initial copulation (PIC). Translucent capsule-like structures were recovered at 12 days PIC and are the first report of such a structure in a felid. Endometrial fibrosis was observed in one cat but, in general, post-surgical fibrosis of the uterus did not seem to impede ova or embryo transport. One embryo underwent cryopreservation and this embryo plus two other transferrable embryos were placed in recipient cats during the course of the study. No pregnancies were maintained; but one non-cryopreserved embryo was detected by ultrasound examination at 2 weeks post-transfer. This study provides valuable groundwork for future studies and warrants optimism for continued research in this area. PMID:12047248

  6. Metallicities of Galaxies in the Lynx-Cancer Void

    NASA Astrophysics Data System (ADS)

    Kniazev, A.; Pustilnik, S.; Tepliakova, A.; Burenkov, A.

    Does the void environment have a sizable effect on the evolution of dwarf galaxies? If yes, the best probes should be the most fragile least massive dwarfs. We compiled a sample of about one hundred dwarfs with MB in the range -12to -18 mag, falling within the nearby Lynx-Cancer void. The goal is to study their evolutionary parameters - gas metallicity and gas mass-fraction, and to address the epoch of the first substantial episode of Star Formation. Here we present and discuss the results of O/H measurements in 38 void galaxies, among which several of the most metal-poor galaxies are found with an oxygen abundance of 12 + log(O/H) = 7. 12-7.3 dex.

  7. Metallicities of galaxies in the nearby Lynx-Cancer void

    E-print Network

    Kniazev, A; Tepliakova, A; Burenkov, A

    2010-01-01

    Does the void environment have a sizable effect on the evolution of dwarf galaxies? If yes, the best probes should be the most fragile least massive dwarfs. We compiled a sample of about one hundred dwarfs with M_B in the range -12 to -18 mag, falling within the nearby Lynx-Cancer void. The goal is to study their evolutionary parameters -- gas metallicity and gas mass-fraction, and to address the epoch of the first substantial episode of Star Formation. Here we present and discuss the results of O/H measurements in 38 void galaxies, among which several the most metal-poor galaxies are found with the oxygen abundances of 12+log(O/H)=7.12-7.3 dex.

  8. Diets, Feeding Specialization, and Predatory Role of Two Lynx Spiders, OxEopes salticus and, Peucetia aöridans (Araneae: Oxyopidae), in a Texas Cotton Agroecosystem

    Microsoft Academic Search

    M. NYFFELER; D. A. DEAN; W. L. STERLING

    The predation ecology of the striped lynx spider, Oxyopes salticus Hentz, and green lynx spider, Peucetia oiridans (Hentz), was studied during lO8 h of visual observation in an insecticide-free cotton ffeld in central Texas. Evidence obtained during this study indicates that lynx spiders were the dominant arthropod predators (among 134 cases ofirthropod predation observed, 94 were attributable to lynx spiders).

  9. Habitat Loss, Not Fragmentation, Drives Occurrence Patterns of Canada Lynx at the Southern Range Periphery

    PubMed Central

    Hornseth, Megan L.; Walpole, Aaron A.; Walton, Lyle R.; Bowman, Jeff; Ray, Justina C.; Fortin, Marie-Josée; Murray, Dennis L.

    2014-01-01

    Peripheral populations often experience more extreme environmental conditions than those in the centre of a species' range. Such extreme conditions include habitat loss, defined as a reduction in the amount of suitable habitat, as well as habitat fragmentation, which involves the breaking apart of habitat independent of habitat loss. The ‘threshold hypothesis’ predicts that organisms will be more affected by habitat fragmentation when the amount of habitat on the landscape is scarce (i.e., less than 30%) than when habitat is abundant, implying that habitat fragmentation may compound habitat loss through changes in patch size and configuration. Alternatively, the ‘flexibility hypothesis’ predicts that individuals may respond to increased habitat disturbance by altering their selection patterns and thereby reducing sensitivity to habitat loss and fragmentation. While the range of Canada lynx (Lynx canadensis) has contracted during recent decades, the relative importance of habitat loss and habitat fragmentation on this phenomenon is poorly understood. We used a habitat suitability model for lynx to identify suitable land cover in Ontario, and contrasted occupancy patterns across landscapes differing in cover, to test the ‘threshold hypothesis’ and ‘flexibility hypothesis’. When suitable land cover was widely available, lynx avoided areas with less than 30% habitat and were unaffected by habitat fragmentation. However, on landscapes with minimal suitable land cover, lynx occurrence was not related to either habitat loss or habitat fragmentation, indicating support for the ‘flexibility hypothesis’. We conclude that lynx are broadly affected by habitat loss, and not specifically by habitat fragmentation, although occurrence patterns are flexible and dependent on landscape condition. We suggest that lynx may alter their habitat selection patterns depending on local conditions, thereby reducing their sensitivity to anthropogenically-driven habitat alteration. PMID:25401737

  10. Habitat loss, not fragmentation, drives occurrence patterns of Canada lynx at the southern range periphery.

    PubMed

    Hornseth, Megan L; Walpole, Aaron A; Walton, Lyle R; Bowman, Jeff; Ray, Justina C; Fortin, Marie-Josée; Murray, Dennis L

    2014-01-01

    Peripheral populations often experience more extreme environmental conditions than those in the centre of a species' range. Such extreme conditions include habitat loss, defined as a reduction in the amount of suitable habitat, as well as habitat fragmentation, which involves the breaking apart of habitat independent of habitat loss. The 'threshold hypothesis' predicts that organisms will be more affected by habitat fragmentation when the amount of habitat on the landscape is scarce (i.e., less than 30%) than when habitat is abundant, implying that habitat fragmentation may compound habitat loss through changes in patch size and configuration. Alternatively, the 'flexibility hypothesis' predicts that individuals may respond to increased habitat disturbance by altering their selection patterns and thereby reducing sensitivity to habitat loss and fragmentation. While the range of Canada lynx (Lynx canadensis) has contracted during recent decades, the relative importance of habitat loss and habitat fragmentation on this phenomenon is poorly understood. We used a habitat suitability model for lynx to identify suitable land cover in Ontario, and contrasted occupancy patterns across landscapes differing in cover, to test the 'threshold hypothesis' and 'flexibility hypothesis'. When suitable land cover was widely available, lynx avoided areas with less than 30% habitat and were unaffected by habitat fragmentation. However, on landscapes with minimal suitable land cover, lynx occurrence was not related to either habitat loss or habitat fragmentation, indicating support for the 'flexibility hypothesis'. We conclude that lynx are broadly affected by habitat loss, and not specifically by habitat fragmentation, although occurrence patterns are flexible and dependent on landscape condition. We suggest that lynx may alter their habitat selection patterns depending on local conditions, thereby reducing their sensitivity to anthropogenically-driven habitat alteration. PMID:25401737

  11. EVOLUTION OF THE COLOR-MAGNITUDE RELATION IN HIGH-REDSHIFT CLUSTERS: EARLY-TYPE GALAXIES IN THE LYNX SUPERCLUSTER AT z $ 1.26

    E-print Network

    IN THE LYNX SUPERCLUSTER AT z $ 1.26 Simona Mei,1 Brad P. Holden,2 John P. Blakeslee,1,3 Piero Rosati,4 Marc in the highest redshift cluster superstructure known today, the Lynx Supercluster. The CMR was determined from. INTRODUCTION The Lynx Supercluster is the highest redshift supercluster known today (Rosati et al. 1999; Nakata

  12. Space-Use, Diet, Demographics, and Topographic Associations of Lynx in the Southern Canadian Rocky Mountains: A Study

    Microsoft Academic Search

    Clayton D. Apps

    Snowshoe hares are considered the primary prey of Canada lynx throughout their range. Relative to northern populations, hares occurring in moun- tainous regions at southern latitudes are thought to remain at low and stable densities through time. Hence, the ecology of associated southern lynx populations is expected to resemble that of northern populations during the low phase of the hare

  13. Lynx: A Programmatic SAT Solver for the RNA-folding Problem Vijay Ganesh, Charles W. O'Donnell,

    E-print Network

    Devadas, Srinivas

    Lynx: A Programmatic SAT Solver for the RNA-folding Problem Vijay Ganesh, Charles W. O@srlabs.de Abstract. This paper introduces Lynx, an incremental programmatic SAT solver that allows non-expert users to easily introduce domain-specific code into modern Conflict-driven Clause- learning (CDCL) SAT solvers

  14. Adapted conservation measures are required to save the Iberian lynx in a changing climate

    NASA Astrophysics Data System (ADS)

    Fordham, D. A.; Akçakaya, H. R.; Brook, B. W.; Rodríguez, A.; Alves, P. C.; Civantos, E.; Triviño, M.; Watts, M. J.; Araújo, M. B.

    2013-10-01

    The Iberian lynx (Lynx pardinus) has suffered severe population declines in the twentieth century and is now on the brink of extinction. Climate change could further threaten the survival of the species, but its forecast effects are being neglected in recovery plans. Quantitative estimates of extinction risk under climate change have so far mostly relied on inferences from correlative projections of species' habitat shifts. Here we use ecological niche models coupled to metapopulation simulations with source-sink dynamics to directly investigate the combined effects of climate change, prey availability and management intervention on the persistence of the Iberian lynx. Our approach is unique in that it explicitly models dynamic bi-trophic species interactions in a climate change setting. We show that anticipated climate change will rapidly and severely decrease lynx abundance and probably lead to its extinction in the wild within 50 years, even with strong global efforts to mitigate greenhouse gas emissions. In stark contrast, we also show that a carefully planned reintroduction programme, accounting for the effects of climate change, prey abundance and habitat connectivity, could avert extinction of the lynx this century. Our results demonstrate, for the first time, why considering prey availability, climate change and their interaction in models is important when designing policies to prevent future biodiversity loss.

  15. Population cycles and changes in body size of the lynx in Alaska.

    PubMed

    Yom-Tov, Yoram; Yom-Tov, Shlomith; MacDonald, Dusty; Yom-Tov, Elad

    2007-05-01

    The lynx Lynx canadensis is a common predator in the boreal forests of North America. Its population fluctuates during a 9- to 11-year cycle in synchrony with the population size of its main prey, the snowshoe hare Lepus americanus. Using adult museum specimens, we studied changes in skull (and hence body) size of the lynx in Alaska during the second half of the 20th century. The population cycle in Alaska averaged 9 years, similar to that reported in the neighbouring Yukon. Using harvest data of lynx as an estimate of population size, we found that skull size was negatively related to population size. This relationship was strongest not for the population density in the year of death (X), but for year X-3, a carry-over effect from the first year (or years) of life, indicating that conditions during the fast-growth years are determining body size. We suggest that the density-dependent effect is probably due to changes in food supply, either resulting from the adverse effects of competition or a possible diminished availability of food. Two skull parameters decreased significantly during the second half of the 20th century. We do not know the cause for the year effect and suggest that it might be due to a long-term change in the availability of prey. Canine size did not change during the study period, probably an indication that snowshoe hares maintained their status as the main prey of the lynx throughout the study period. PMID:17277929

  16. Predators choose prey over prey habitats: evidence from a lynx-hare system.

    PubMed

    Keim, Jonah L; DeWitt, Philip D; Lele, Subhash R

    2011-06-01

    Resource selection is grounded in the understanding that animals select resources based on fitness requirements. Despite uncertainty in how mechanisms relate to the landscape, resource selection studies often assume, but rarely demonstrate, a relationship between modeled variables and fitness mechanisms. Using Canada lynx (Lynx canadensis) and snowshoe hare (Lepus americanus) as a model system, we assess whether prey habitat is a viable surrogate for encounters between predators and prey. We simultaneously collected winter track data for lynx and hare in two study areas. We used information criteria to determine whether selection by lynx is best characterized by a hare resource selection probability function (RSPF) or by the amount of hare resource use. Results show that lynx selection is better explained by the amount of hare use (SIC = -21.9; Schwarz's Information Criterion) than by hare RSPF (SIC = -16.71), and that hare RSPF cannot be assumed to reveal the amount of resource use, a primary mechanism of predator selection. Our study reveals an obvious but important distinction between selection and use that is applicable to all resource selection studies. We recommend that resource selection studies be coupled with mechanistic data (e.g., metrics of diet, forage, fitness, or abundance) when investigating mechanisms of resource selection. PMID:21774407

  17. Influence of adrenocorticotrophin hormone challenge and external factors (age, sex, and body region) on hair cortisol concentration in Canada lynx (Lynx canadensis).

    PubMed

    Terwissen, C V; Mastromonaco, G F; Murray, D L

    2013-12-01

    Land use changes are a significant factor influencing the decline of felid populations. However, additional research is needed to better understand how these factors influence populations in the wild. Hormone analysis can provide valuable information on the basic physiology and overall health of an animal, and enzyme immunoassays (EIA) are generally used for hair hormone analysis but must first be validated for the substrate of choice and species of interest. To date, hormone assays from hair have not been validated for Felidae, despite that the method holds considerable promise for non-invasive sampling of free-ranging animals. We sought to: (1) evaluate whether increased adrenocorticotrophin hormone (ACTH) during the period of hair growth results in elevated hair cortisol; (2) validate the enzyme immunoassay used; and (3) identify any variations in hair cortisol between age, sex and body regions, using Canada lynx. We quantified hair cortisol concentrations in captive animals through an ACTH challenge and collected samples from legally harvested lynx to compare variability between body regions. An EIA was validated for the analysis of hair cortisol. Lynx (n=3) had a qualitative increase in hair cortisol concentration following an ACTH challenge in captive animals (20 IU/kg of body weight weekly for 5 weeks), thereby supporting the use of an EIA to quantify cortisol values in hair. Based on our analysis of sampled lynx pelts, we found that hair cortisol did not vary between age and sex, but varied within the foot/leg region to a greater extent than between individuals. We recommend that future studies identify a standardized location for hair cortisol sampling. PMID:24080086

  18. Space Use, Movements and Habitat Selection of Adult Bobcats (Lynx rufus) in Central Mississippi

    Microsoft Academic Search

    MICHAEL J. CHAMBERLAIN; BRUCE D. LEOPOLD; L. MIKE CONNER

    2003-01-01

    Many factors influence bobcat (Lynx rufus) space use, movements and habitat selection, including prey distribution and density, season, breeding behaviors and intraspecific relationships. Knowledge of ranging behaviors and habitat selection is required to understand population dynamics and ecology of bobcats within temperate ecosystems. We radio-monitored 58 adult bobcats from 1989-1997 in central Mississippi. Males maintained larger home ranges and core

  19. Bobcat (Lynx rufus) Breeding in Captivity: The Importance of Environmental Enrichment

    Microsoft Academic Search

    María I. Mollá; Miguel A. Quevedo; Francisca Castro

    2011-01-01

    Environmental enrichment is an improvement in the biological functioning of nonhuman animals in captivity resulting from modifications to their environment; however, specifying appropriate and practical measures of enrichment is problematic. This study analyzes the behavior of 4 bobcats (Lynx rufus) in the Jerez Zoo before and after the application of a global program of environmental enrichment that included (a) changes

  20. Annual Dynamics of Bobcat (Lynx rufus) Home Range and Core Use Areas in Mississippi

    Microsoft Academic Search

    Bruce W. Plowman; L. Mike Conner; Michael J. Chamberlain; Bruce D. Leopold; Loren W. Burger

    2006-01-01

    We investigated the annual dynamics of bobcat (Lynx rufus) home range and core use areas by radiotracking 23 female and 6 male bobcats from 10 January 1989 to 31 January 1998 in Mississippi. We quantified space use by measuring changes in the dispersion and central tendency of bobcat locations (i.e., radiotelemetry locations) between annual home range and core use areas.

  1. Habitat Selection and Risk of Predation: Re-colonization by Lynx had Limited Impact on Habitat Selection by Roe Deer

    PubMed Central

    Samelius, Gustaf; Andrén, Henrik; Kjellander, Petter; Liberg, Olof

    2013-01-01

    Risk of predation is an evolutionary force that affects behaviors of virtually all animals. In this study, we examined how habitat selection by roe deer was affected by risk of predation by Eurasian lynx – the main predator of roe deer in Scandinavia. Specifically, we compared how habitat selection by roe deer varied (1) before and after lynx re-established in the study area and (2) in relation to habitat-specific risk of predation by lynx. All analyses were conducted at the spatial and temporal scales of home ranges and seasons. We did not find any evidence that roe deer avoided habitats in which the risk of predation by lynx was greatest and information-theoretic model selection showed that re-colonization by lynx had limited impact on habitat selection by roe deer despite lynx predation causing 65% of known mortalities after lynx re-colonized the area. Instead we found that habitat selection decreased when habitat availability increased for 2 of 5 habitat types (a pattern referred to as functional response in habitat selection). Limited impact of re-colonization by lynx on habitat selection by roe deer in this study differs from elk in North America altering both daily and seasonal patterns in habitat selection at the spatial scales of habitat patches and home ranges when wolves were reintroduced to Yellowstone National Park. Our study thus provides further evidence of the complexity by which animals respond to risk of predation and suggest that it may vary between ecosystems and predator-prey constellations. PMID:24069419

  2. Experimental transmission of Cytauxzoon felis from bobcats (Lynx rufus) to domestic cats (Felis domesticus).

    PubMed

    Kier, A B; Wagner, J E; Morehouse, L G

    1982-01-01

    Freshly collected blood and/or spleen homogenate from an experimentally infected Florida bobcat (Lynx rufus floridanus), which had died of feline cytauxzoonosis, was inoculated into domestic cats. All inoculated cats had clinical signs of feline cytauxzoonosis and died within 2 weeks after they were inoculated. Similar material collected from an eastern bobcat (Lynx rufus rufus) carrying an experimentally infected Cytauxzoon felis parasitemia was inoculated into domestic cats. All inoculated cats developed a parasitemia, but none developed clinical signs of disease and none died of the disease. Cats subinoculated with parasitemic cat blood also developed parasitemias and they too did not develop clinical signs of infection nor died. After carrying the blood phase of Cytauxzoon felis for various periods, the domestic cats were then challenge exposed with proven lethal Cytauxzoon inoculum of domestic cat origin. All cats died of cytauxzoonosis. PMID:6807145

  3. Dwarf galaxies in the nearby Lynx-Cancer void: photometry, colours and ages

    E-print Network

    Pustilnik, S; Lyamina, Y; Tepliakova, A

    2010-01-01

    The nearby Lynx-Cancer void is a good laboratory to study the effect of very rarefied environment on the evolution of the least massive dwarf galaxies. A recently compiled sample of this void's galaxies includes about one hundred objects with M_B in the range -12 to -18 mag. Good quality images are available in the SDSS database for ~80% of the sample. Their u,g,r,i,z photometry allows one to derive galaxy stellar mass (and, incorporating HI data, gas mass-fraction) and ages of visible stellar populations, and hence, the epoch of their formation (first SF episode). We present the first photometric results of the ongoing study of the Lynx-Cancer void.

  4. Dwarf Galaxies in the Nearby Lynx-Cancer Void: Photometry, Colours and Ages

    NASA Astrophysics Data System (ADS)

    Pustilnik, Simon; Kniazev, Alexei; Lyamina, Yulia; Tepliakova, Arina

    The nearby Lynx-Cancer void is a good laboratory to study the effect of very rarefied environment on the evolution of the least massive dwarf galaxies. A recently compiled sample of this void's galaxies includes about one hundred objects with MB in the range -12 to -18 mag. Good quality images are available in the SDSS database for ˜80% of the sample. Their u, g, r, i, z photometry allows one to derive galaxy stellar mass (and, incorporating HI data, gas mass-fraction) and ages of visible stellar populations, and hence, the epoch of their formation (first SF episode). We present the first photometric results of the ongoing study of the Lynx-Cancer void.

  5. Lynx1, a cholinergic brake limits plasticity in adult visual cortex

    PubMed Central

    Morishita, Hirofumi; Miwa, Julie M.; Heintz, Nathaniel; Hensch, Takao K

    2012-01-01

    Experience-dependent brain plasticity typically declines after an early critical period during which circuits are established. Loss of plasticity with closure of the critical period limits improvement of function in adulthood, but the mechanisms that change the brain’s plasticity remain poorly understood. Here, we identified an increase in expression of Lynx1 protein in mice that prevented plasticity in the primary visual cortex late in life. Removal of this molecular brake enhanced nicotinic acetylcholine receptor signaling. Lynx1 expression thus maintains stability of mature cortical networks in the presence of cholinergic innervation. The results suggest that modulating the balance between excitatory and inhibitory circuits reactivates visual plasticity and may present a therapeutic target. PMID:21071629

  6. Performance and rotor loads measurements of the Lynx XZ170 helicopter with rectangular blades

    NASA Technical Reports Server (NTRS)

    Lau, Benton H.; Louie, Alexander W.; Griffiths, Nicholas; Sotiriou, Costantinos P.

    1993-01-01

    This report presents the results of a series of flight tests on the Lynx XZ170 helicopter with rectangular blades. The test objectives were to explore the flight envelope and to measure the performance and structural loads of the Lynx main-rotor system. The tests were conducted as part of the British Experimental Rotor Program (BERP) under a contract with the Ministry of Defense in England. Data were acquired for steady-level flights at five weight coefficients. Some flight conditions were tested at beyond the retreating-blade stall boundary, which was defined by a predetermined limit on the pitchlink vibratory load. In addition to documenting the flight conditions and data, this report describes the aircraft, particularly the rotor system, in detail.

  7. Isometric scaling in home-range size of male and female bobcats ( Lynx rufus )

    Microsoft Academic Search

    Adam W. Ferguson; Nathan A. Currit; Floyd W. Weckerly

    2009-01-01

    For solitary carnivores a polygynous mating system should lead to predictable patterns in space-use dynamics. Females should be most influenced by resource distribution and abundance, whereas polygynous males should be strongly influenced by female spatial dynamics. We gathered mean annual home-range-size estimates for male and female bobcats (Lynx rufus (Schreber, 1777)) from previous studies to address variation in home-range size

  8. Quantifying home range habitat requirements for bobcats ( Lynx rufus) in Vermont, USA

    Microsoft Academic Search

    Therese M. Donovan; Mark Freeman; Hanem Abouelezz; Kimberly Royar; Alan Howard; Ruth Mickey

    We demonstrate how home range and habitat use analysis can inform landscape-scale conservation planning for the bobcat, Lynx rufus, in Vermont USA. From 2005 to 2008, we outfitted fourteen bobcats with GPS collars that collected spatially explicit locations from individuals every 4h for 3–4months. Kernel home range techniques were used to estimate home range size and boundaries, and to quantify

  9. Responses of a transplanted troop of Japanese macaques ( Macaca fuscata ) to bobcat ( Lynx rufus ) predation

    Microsoft Academic Search

    Harold Gouzoules; Linda M. Fedigan; Larry Fedigan

    1975-01-01

    A series of encounters between a transplanted troop of Japanese monkeys (Macaca fuscata) and one or more bobcats (Lynx rufus) is described. One incident of predation was observed and four additional cases assumed. Reactions of identified individuals\\u000a and groups of monkeys as well as general troop reactions are noted. The effects of breeding season behavior, troop size, differences\\u000a in mother

  10. Home Range Size and Choice of Management Strategy for Lynx in Scandinavia

    Microsoft Academic Search

    JOHN D. C. LINNELL; REIDAR ANDERSEN; TOR KVAM; HENRIK ANDRÉN; OLOF LIBERG; JOHN ODDEN; P. F. MOA

    2001-01-01

    Annual and seasonal home ranges were calculated for 47 Eurasian lynx in four Scandinavian study sites (two in Sweden and two\\u000a in Norway). The observed home ranges were the largest reported for the species, with study site averages ranging from 600\\u000a to 1400 km2 for resident males and from 300 to 800 km2 for resident females. When home range sizes

  11. Study of galaxies in the Lynx-Cancer void. II. The element abundances

    E-print Network

    Pustilnik, S A; Kniazev, A Y

    2011-01-01

    In the framework of the study of the evolutionary status of galaxies in the nearby Lynx-Cancer void, we present the results of the SAO RAS 6-m telescope spectroscopy for 20 objects in this region. The principal faint line [OIII]4363A, used to determine the electron temperature and oxygen abundance (O/H) by the classical method, is clearly detected in only about 2/3 of the studied objects. For the remaining galaxies this line is either faint or undetected. To obtain the oxygen abundances in these galaxies we as well apply the semi-empirical method by Izotov and Thuan, and/or the empirical methods of Pilyugin et al., which are only employing the intensities of sufficiently strong lines. We also present our O/H measurements for 22 Lynx-Cancer void galaxies, for which the suitable Sloan Digital Sky Survey (SDSS) spectra are available. In total, we present the combined O/H data for 48 Lynx-Cancer void galaxies, including the data adopted from the literature and our own earlier results. We make a comparison of thei...

  12. The subtle role of climate change on population genetic structure in Canada lynx.

    PubMed

    Row, Jeffrey R; Wilson, Paul J; Gomez, Celine; Koen, Erin L; Bowman, Jeff; Thornton, Daniel; Murray, Dennis L

    2014-07-01

    Anthropogenically driven climatic change is expected to reshape global patterns of species distribution and abundance. Given recent links between genetic variation and environmental patterns, climate change may similarly impact genetic population structure, but we lack information on the spatial and mechanistic underpinnings of genetic-climate associations. Here, we show that current genetic variability of Canada lynx (Lynx canadensis) is strongly correlated with a winter climate gradient (i.e. increasing snow depth and winter precipitation from west-to-east) across the Pacific-North American (PNO) to North Atlantic Oscillation (NAO) climatic systems. This relationship was stronger than isolation by distance and not explained by landscape variables or changes in abundance. Thus, these patterns suggest that individuals restricted dispersal across the climate boundary, likely in the absence of changes in habitat quality. We propose habitat imprinting on snow conditions as one possible explanation for this unusual phenomenon. Coupling historical climate data with future projections, we also found increasingly diverging snow conditions between the two climate systems. Based on genetic simulations using projected climate data (2041-2070), we predicted that this divergence could lead to a threefold increase in genetic differentiation, potentially leading to isolated east-west populations of lynx in North America. Our results imply that subtle genetic structure can be governed by current climate and that substantive genetic differentiation and related ecological divergence may arise from changing climate patterns. PMID:24415466

  13. WEAK-LENSING DETECTION AT z $ 1.3: MEASUREMENT OF THE TWO LYNX CLUSTERS WITH THE ADVANCED CAMERA FOR SURVEYS

    E-print Network

    WEAK-LENSING DETECTION AT z $ 1.3: MEASUREMENT OF THE TWO LYNX CLUSTERS WITH THE ADVANCED CAMERA are separated by $40 from each other and appear to form a supercluster in the Lynx field. Using our deep ACS i

  14. Interacting Effects of Climate Change, Landscape Conversion, and Harvest on Carnivore Populations at the Range Margin: Marten and Lynx in the Northern Appalachians

    Microsoft Academic Search

    CARLOS CARROLL

    2007-01-01

    Assessing the effects of climate change on threatened species requires moving beyond simple biocli- matic models to models that incorporate interactions among climatic trends, landscape change, environmental stochasticity, and species life history. Populations of marten (Martes americana) and lynx (Lynx canadensis )i n southeastern Canada and the northeastern United States represent peninsular extensions of boreal ranges and illustrate the potential

  15. Lynx body size in Norway is related to its main prey (Roe deer) density, climate, and latitude.

    PubMed

    Yom-Tov, Yoram; Kvam, Tor; Wiig, Øystein

    2011-02-01

    We studied the effect of various factors on body size variation of the Eurasian lynx in Norway, using data from 374 lynx collected between 1960 and 1976 and whose locality of capture, year of birth, sex, and age were known. Body size of lynx in Norway was mainly affected by sex and age. Female skull size (and by implication body size) was also positively affected by the availability of its main prey (roe deer) and by latitude, and negatively by the North Atlantic Oscillation (NAO). Male size was not affected by any of the environmental factors examined. We interpret the effects of NAO and latitude on body size through their effect on the local climate and particularly snow conditions. We suggest that females are more sensitive to environmental factors than males. PMID:21404822

  16. Water-soluble LYNX1 Residues Important for Interaction with Muscle-type and/or Neuronal Nicotinic Receptors*

    PubMed Central

    Lyukmanova, Ekaterina N.; Shulepko, Mikhail A.; Buldakova, Svetlana L.; Kasheverov, Igor E.; Shenkarev, Zakhar O.; Reshetnikov, Roman V.; Filkin, Sergey Y.; Kudryavtsev, Denis S.; Ojomoko, Lucy O.; Kryukova, Elena V.; Dolgikh, Dmitry A.; Kirpichnikov, Mikhail P.; Bregestovski, Piotr D.; Tsetlin, Victor I.

    2013-01-01

    Human LYNX1, belonging to the Ly6/neurotoxin family of three-finger proteins, is membrane-tethered with a glycosylphosphatidylinositol anchor and modulates the activity of nicotinic acetylcholine receptors (nAChR). Recent preparation of LYNX1 as an individual protein in the form of water-soluble domain lacking glycosylphosphatidylinositol anchor (ws-LYNX1; Lyukmanova, E. N., Shenkarev, Z. O., Shulepko, M. A., Mineev, K. S., D'Hoedt, D., Kasheverov, I. E., Filkin, S. Y., Krivolapova, A. P., Janickova, H., Dolezal, V., Dolgikh, D. A., Arseniev, A. S., Bertrand, D., Tsetlin, V. I., and Kirpichnikov, M. P. (2011) NMR structure and action on nicotinic acetylcholine receptors of water-soluble domain of human LYNX1. J. Biol. Chem. 286, 10618–10627) revealed the attachment at the agonist-binding site in the acetylcholine-binding protein (AChBP) and muscle nAChR but outside it, in the neuronal nAChRs. Here, we obtained a series of ws-LYNX1 mutants (T35A, P36A, T37A, R38A, K40A, Y54A, Y57A, K59A) and examined by radioligand analysis or patch clamp technique their interaction with the AChBP, Torpedo californica nAChR and chimeric receptor composed of the ?7 nAChR extracellular ligand-binding domain and the transmembrane domain of ?1 glycine receptor (?7-GlyR). Against AChBP, there was either no change in activity (T35A, T37A), slight decrease (K40A, K59A), and even enhancement for the rest mutants (most pronounced for P36A and R38A). With both receptors, many mutants lost inhibitory activity, but the increased inhibition was observed for P36A at ?7-GlyR. Thus, there are subtype-specific and common ws-LYNX1 residues recognizing distinct targets. Because ws-LYNX1 was inactive against glycine receptor, its “non-classical” binding sites on ?7 nAChR should be within the extracellular domain. Micromolar affinities and fast washout rates measured for ws-LYNX1 and its mutants are in contrast to nanomolar affinities and irreversibility of binding for ?-bungarotoxin and similar snake ?-neurotoxins also targeting ?7 nAChR. This distinction may underlie their different actions, i.e. nAChRs modulation versus irreversible inhibition, for these two types of three-finger proteins. PMID:23585571

  17. Fast rockfall hazard assessment along a road section using the new LYNX Mobile Mapper Lidar

    NASA Astrophysics Data System (ADS)

    Dario, Carrea; Celine, Longchamp; Michel, Jaboyedoff; Marc, Choffet; Marc-Henri, Derron; Clement, Michoud; Andrea, Pedrazzini; Dario, Conforti; Michael, Leslar; William, Tompkinson

    2010-05-01

    The terrestrial laser scanning (TLS) is an active remote sensing technique providing high resolution point clouds of the topography. The high resolution digital elevations models (HRDEM) derived of these point clouds are an important tool for the stability analysis of slopes. The LYNX Mobile Mapper is a new TLS generation developed by Optech. Its particularity is to be mounted on a vehicle and providing a 360° high density point cloud at 200-khz measurement rate in a very short acquisition time. It is composed of two sensors improving the resolution and reducing the laser shadowing. The spatial resolution is better than 10 cm at 10 m range and at a velocity of 50 km/h and the reflectivity of the signal is around 20% at a distance of 200 m. The Lidar is also equipped with a DGPS and an inertial measurement unit (IMU) which gives real time position and georeferences directly the point cloud. Thanks to its ability to provide a continuous data set from an extended area along a road, this TLS system is useful for rockfall hazard assessment. In addition, this new scanner decrease considerably the time spent in the field and the postprocessing is reduced thanks to resultant georeferenced data. Nevertheless, its application is limited to an area close to the road. The LYNX has been tested near Pontarlier (France) along roads sections affected by rockfall. Regarding to the tectonic context, the studied area is located in the Folded Jura mainly composed of limestone. The result is a very detailed point cloud with a point spacing of 4 cm. The LYNX presents detailed topography on which a structural analysis has been carried out using COLTOP-3D. It allows obtaining a full structural description along the road. In addition, kinematic tests coupled with probabilistic analysis give a susceptibility map of the road cut or natural cliffs above the road. Comparisons with field survey confirm the Lidar approach.

  18. Suivi d'une nouvelle UG du Lynx : MASTER OT J072948.66+593824.4

    NASA Astrophysics Data System (ADS)

    Morillon, E.

    2012-03-01

    Suite à la détection, par nos collègues russes, d'une nouvelle variable dans le Lynx mi- février 2012, et à la diffusion de l'alerte sur internet, j'ai pu pointer cette nouvelle cataclysmique de type UGSU, pendant 4h, avant qu'elle ne retourne à son état de repos. Après un rappel sur sa découverte, j'exposerai la façon dont je l'ai suivie 4 jours après la découverte et les quelques résultats que l'on peut en extraire.

  19. Discovery of a Large Scale Clumpy Structure around the Lynx Supercluster at z~1.27

    E-print Network

    Fumiaki Nakata; Tadayuki Kodama; Kazuhiro Shimasaku; Mamoru Doi; Hisanori Furusawa; Masaru Hamabe; Masahiko Kimura; Yutaka Komiyama; Satoshi Miyazaki; Sadanori Okamura; Masami Ouchi; Maki Sekiguchi; Yoshihiro Ueda; Masafumi Yagi; Naoki Yasuda

    2004-12-17

    We report the discovery of a probable large scale structure composed of many galaxy clumps around the known twin clusters at z=1.26 and z=1.27 in the Lynx region. Our analysis is based on deep, panoramic, and multi-colour imaging (26.4'x24.1') in VRi'z'-bands with the Suprime-Cam on the 8.2m Subaru telescope. This unique, deep and wide-field imaging data-set allows us for the first time to map out the galaxy distribution in the highest redshift supercluster known. We apply a photometric redshift technique to extract plausible cluster members at z~1.27 down to i'=26.15 (5sigma) corresponding to \\~M*+2.5 at this redshift. From the 2-D distribution of these photometrically selected galaxies, we newly identify seven candidates of galaxy groups or clusters where the surface density of red galaxies is significantly high (>5sigma), in addition to the two known clusters. These candidates show clear red colour-magnitude sequences consistent with a passive evolution model, which suggests the existence of additional high density regions around the Lynx superclusters.

  20. Cytauxzoon felis infections are present in bobcats ( Lynx rufus) in a region where cytauxzoonosis is not recognized in domestic cats

    Microsoft Academic Search

    Adam J. Birkenheuer; Henry S. Marr; Camille Warren; Anne E. Acton; Eric M. Mucker; Jan G. Humphreys; Melissa D. Tucker

    2008-01-01

    This study was performed to determine the prevalence of Cytauxzoon felis (C. felis) infections in bobcats (Lynx rufus) from a region where C. felis is recognized in domestic cats, North Carolina (NC), and a region where C. felis is not recognized in domestic cats, Pennsylvania (PA). Samples from NC (n=32) were obtained post-mortem via cardiac puncture from legally trapped bobcats.

  1. Distribution and prevalence of Cytauxzoon felis in bobcats ( Lynx rufus), the natural reservoir, and other wild felids in thirteen states

    Microsoft Academic Search

    Barbara C. Shock; Staci M. Murphy; Laura L. Patton; Philip M. Shock; Colleen Olfenbuttel; Jeff Beringer; Suzanne Prange; Daniel M. Grove; Matt Peek; Joseph W. Butfiloski; Daymond W. Hughes; J. Mitchell Lockhart; Sarah N. Bevins; Sue VandeWoude; Kevin R. Crooks; Victor F. Nettles; Holly M. Brown; David S. Peterson; Michael J. Yabsley

    2011-01-01

    Cytauxzoon felis, a protozoan parasite of wild and domestic felids, is the causative agent of cytauxzoonosis in domestic and some exotic felids in the United States. The bobcat (Lynx rufus) is the natural reservoir for this parasite, but other felids such as Florida panthers (Puma concolor coryii) and domestic cats may maintain long-term parasitemias and serve as reservoirs. Experimentally, two

  2. Neuron, Vol. 23, 105114, May, 1999, Copyright 1999 by Cell Press lynx1, an Endogenous Toxin-like Modulator

    E-print Network

    Sali, Andrej

    of the immune system. A direct evolutionary relationship between lynx1 and the Ly-6/The correct function relationship between snake venom sarafotoxins andNew York, New York 10032 vertebrate endothelins has also been to brain sections system. They are thought to participate in diverse recog-correlates with the distribution

  3. Gene Sets for Utilization of Primary and Secondary Nutrition Supplies in the Distal Gut of Endangered Iberian Lynx

    PubMed Central

    Alcaide, María; Messina, Enzo; Richter, Michael; Bargiela, Rafael; Peplies, Jörg; Huws, Sharon A.; Newbold, Charles J.; Golyshin, Peter N.; Simón, Miguel A.; López, Guillermo; Yakimov, Michail M.; Ferrer, Manuel

    2012-01-01

    Recent studies have indicated the existence of an extensive trans-genomic trans-mural co-metabolism between gut microbes and animal hosts that is diet-, host phylogeny- and provenance-influenced. Here, we analyzed the biodiversity at the level of small subunit rRNA gene sequence and the metabolic composition of 18 Mbp of consensus metagenome sequences and activity characteristics of bacterial intra-cellular extracts, in wild Iberian lynx (Lynx pardinus) fecal samples. Bacterial signatures (14.43% of all of the Firmicutes reads and 6.36% of total reads) related to the uncultured anaerobic commensals Anaeroplasma spp., which are typically found in ovine and bovine rumen, were first identified. The lynx gut was further characterized by an over-representation of ‘presumptive’ aquaporin aqpZ genes and genes encoding ‘active’ lysosomal-like digestive enzymes that are possibly needed to acquire glycerol, sugars and amino acids from glycoproteins, glyco(amino)lipids, glyco(amino)glycans and nucleoside diphosphate sugars. Lynx gut was highly enriched (28% of the total glycosidases) in genes encoding ?-amylase and related enzymes, although it exhibited low rate of enzymatic activity indicative of starch degradation. The preponderance of ?-xylosidase activity in protein extracts further suggests lynx gut microbes being most active for the metabolism of ?-xylose containing plant N-glycans, although ?-xylosidases sequences constituted only 1.5% of total glycosidases. These collective and unique bacterial, genetic and enzymatic activity signatures suggest that the wild lynx gut microbiota not only harbors gene sets underpinning sugar uptake from primary animal tissues (with the monotypic dietary profile of the wild lynx consisting of 80–100% wild rabbits) but also for the hydrolysis of prey-derived plant biomass. Although, the present investigation corresponds to a single sample and some of the statements should be considered qualitative, the data most likely suggests a tighter, more coordinated and complex evolutionary and nutritional ecology scenario of carnivore gut microbial communities than has been previously assumed. PMID:23251564

  4. Reconsidering the specialist-generalist paradigm in niche breadth dynamics: resource gradient selection by Canada lynx and bobcat.

    PubMed

    Peers, Michael J L; Thornton, Daniel H; Murray, Dennis L

    2012-01-01

    The long-standing view in ecology is that disparity in overall resource selection is the basis for identifying niche breadth patterns, with species having narrow selection being classified "specialists" and those with broader selection being "generalists". The standard model of niche breadth characterizes generalists and specialists as having comparable levels of overall total resource exploitation, with specialists exploiting resources at a higher level of performance over a narrower range of conditions. This view has gone largely unchallenged. An alternate model predicts total resource use being lower for the specialized species with both peaking at a comparable level of performance over a particular resource gradient. To reconcile the niche breadth paradigm we contrasted both models by developing range-wide species distribution models for Canada lynx, Lynx canadensis, and bobcat, Lynx rufus. Using a suite of environmental factors to define each species' niche, we determined that Canada lynx demonstrated higher total performance over a restricted set of variables, specifically those related to snow and altitude, while bobcat had higher total performance across most variables. Unlike predictions generated by the standard model, bobcat level of exploitation was not compromised by the trade-off with peak performance, and Canada lynx were not restricted to exploiting a narrower range of conditions. Instead, the emergent pattern was that specialist species have a higher total resource utilization and peak performance value within a smaller number of resources or environmental axes than generalists. Our results also indicate that relative differences in niche breadth are strongly dependent on the variable under consideration, implying that the appropriate model describing niche breadth dynamics between specialists and generalists may be more complex than either the traditional heuristic or our modified version. Our results demonstrate a need to re-evaluate traditional, but largely untested, assumptions regarding resource utilization in species with broad and narrow niches. PMID:23236508

  5. Reconsidering the Specialist-Generalist Paradigm in Niche Breadth Dynamics: Resource Gradient Selection by Canada Lynx and Bobcat

    PubMed Central

    Peers, Michael J. L.; Thornton, Daniel H.; Murray, Dennis L.

    2012-01-01

    The long-standing view in ecology is that disparity in overall resource selection is the basis for identifying niche breadth patterns, with species having narrow selection being classified “specialists” and those with broader selection being “generalists”. The standard model of niche breadth characterizes generalists and specialists as having comparable levels of overall total resource exploitation, with specialists exploiting resources at a higher level of performance over a narrower range of conditions. This view has gone largely unchallenged. An alternate model predicts total resource use being lower for the specialized species with both peaking at a comparable level of performance over a particular resource gradient. To reconcile the niche breadth paradigm we contrasted both models by developing range-wide species distribution models for Canada lynx, Lynx canadensis, and bobcat, Lynx rufus. Using a suite of environmental factors to define each species’ niche, we determined that Canada lynx demonstrated higher total performance over a restricted set of variables, specifically those related to snow and altitude, while bobcat had higher total performance across most variables. Unlike predictions generated by the standard model, bobcat level of exploitation was not compromised by the trade-off with peak performance, and Canada lynx were not restricted to exploiting a narrower range of conditions. Instead, the emergent pattern was that specialist species have a higher total resource utilization and peak performance value within a smaller number of resources or environmental axes than generalists. Our results also indicate that relative differences in niche breadth are strongly dependent on the variable under consideration, implying that the appropriate model describing niche breadth dynamics between specialists and generalists may be more complex than either the traditional heuristic or our modified version. Our results demonstrate a need to re-evaluate traditional, but largely untested, assumptions regarding resource utilization in species with broad and narrow niches. PMID:23236508

  6. Study of galaxies in the Lynx-Cancer void. II. Element abundances

    NASA Astrophysics Data System (ADS)

    Pustilnik, S. A.; Tepliakova, A. L.; Kniazev, A. Yu.

    2011-07-01

    In the framework of study of the evolutionary status of galaxies in the nearby Lynx-Cancer void, we present the results of the SAO RAS 6-m telescope spectroscopy for 20 objects in this region. The principal faint line [O iii]?4363 Å, used to determine the electron temperature and oxygen abundance (O/H) by the classicalmethod, is clearly detected in only about 2/3 of the studied objects. For the remaining galaxies this line is either faint or undetected. To obtain the oxygen abundances in these galaxies we as well apply the semi-empirical method by Izotov and Thuan, and/or the empirical methods of Pilyugin et al., which are only employing the intensities of sufficiently strong lines. We also present our O/H measurements for 22 Lynx-Cancer void galaxies, for which the suitable Sloan Digital Sky Survey (SDSS) spectra are available. In total, we present the combined O/H data for 48 Lynx-Cancer void galaxies, including the data adopted from the literature and our own earlier results. We make a comparison of their locations on the (O/H)-MB diagram with those of the dwarf galaxies of the Local Volume in the regions with denser environment. We infer that the majority of galaxies from this void on the average reveal an about 30% lower metallicity. In addition, a substantial fraction (not less than 10%) of the void dwarf galaxies have a much larger O/H deficiency (up to a factor of 5). Most of them belong to the tiny group of objects with the gas metallicity Z

  7. Mon. Not. R. Astron. Soc. 000, 134 (2002) Printed 15 June 2007 (MN LATEX style file v2.2) A sample of mJy radio sources at 1.4 GHz in the Lynx and Hercules

    E-print Network

    Best, Philip

    2002-01-01

    of mJy radio sources at 1.4 GHz in the Lynx and Hercules fields - I. Radio imaging, multicolour of the Leiden­Berkeley Deep Survey. These fields, Hercules.1 and Lynx.2, contain a complete sample of 81 radio unidentified at a level of r 25.2 mag (Hercules; 4 sources) or r 24.4 mag (Lynx; 7 sources) or K>20 mag

  8. Diagnosis and treatment of primary hyperparathyroidism in a bobcat (Lynx rufus).

    PubMed

    Goodnight, Andrea L; Gottfried, Sharon D; Emanuelson, Karen

    2011-09-01

    An 18-yr-old male bobcat (Lynx rufus) presented with chronic moderate weight loss and acute onset of anorexia and lethargy. Hypercalcemia and azotemia were present on the serum chemistry panel. Abdominal ultrasound revealed hyperechoic renal cortices, but no evidence of neoplasia. Ionized calcium and 25-hydroxyvitamin D were mildly elevated, intact parathyroid hormone was severely elevated, and parathormone-related protein was undetected, suggesting primary hyperparathyroidism with possible renal dysfunction. Azotemia lessened in severity following diuresis, but hypercalcemia persisted; thus primary hyperparathyroidism was considered the most probable differential diagnosis. A second ultrasound including the cervical region revealed a solitary intraparenchymal left thyroid nodule. The nodule was surgically excised; histopathology confirmed a parathyroid adenoma. Although primary hyperparathyroidism was suspected, diagnosis was not achieved from serum chemistry values alone. This case emphasizes the importance of diagnostic imaging and histopathology in the investigation of persistently abnormal laboratory values. PMID:22950324

  9. Bobcat (Lynx rufus) breeding in captivity: the importance of environmental enrichment.

    PubMed

    Mollá, María I; Quevedo, Miguel A; Castro, Francisca

    2011-01-01

    Environmental enrichment is an improvement in the biological functioning of nonhuman animals in captivity resulting from modifications to their environment; however, specifying appropriate and practical measures of enrichment is problematic. This study analyzes the behavior of 4 bobcats (Lynx rufus) in the Jerez Zoo before and after the application of a global program of environmental enrichment that included (a) changes in the size and complexity of their installations, (b) the introduction of new objects into compounds, (c) changes in diet, and (d) modifications in the grouping of animals. A factorial correspondence analysis showed a highly significant relationship among individual animals, behavior, and experimental design. Behaviors such as locomotion, repeated pacing, vigilance, and grooming more often occurred before enrichment, whereas exploratory and food behaviors were more often associated with the enrichment phase. After the implementation of the enrichment program, the bobcats bred successfully for the first time since their arrival in the zoo. PMID:21442505

  10. Scavenging behavior of Lynx rufus on human remains during the winter months of Southeast Texas.

    PubMed

    Rippley, Angela; Larison, Nicole C; Moss, Kathryn E; Kelly, Jeffrey D; Bytheway, Joan A

    2012-05-01

    Animal-scavenging alterations on human remains can be mistaken as human criminal activity. A 32-day study, documenting animal scavenging on a human cadaver, was conducted at the Southeast Texas Applied Forensic Science facility, Sam Houston State University, Huntsville, Texas. A Stealth Cam Rogue IR was positioned near the cadaver to capture scavenging activity. An atypical scavenger, the bobcat, Lynx rufus, was recorded feeding on the cadaver. Scavenging by bobcats on human remains is not a predominant behavior and has minimal documentation. Scavenging behaviors and destruction of body tissues were analyzed. Results show that the bobcat did not feed on areas of the body that it does for other large animal carcasses. Results also show the bobcat feeds similarly during peak and nonpeak hours. Understanding the destruction of human tissue and covering of the body with leaf debris may aid forensic anthropologists and pathologists in differentiating between nefarious human activity and animal scavenging. PMID:22236440

  11. Performance and loads data from an outdoor hover test of a Lynx tail rotor

    NASA Technical Reports Server (NTRS)

    Signor, David B.; Yamauchi, Gloria K.; Smith, Charles A.; Hagen, Martin J.

    1989-01-01

    A Lynx tail rotor was tested in hover at the Outdoor Aerodynamic Research Facility at NASA Ames Research Center. The test objectives were to measure the isolated rotor performance to provide a baseline for subsequent testing, and to operate the rotor throughout the speed and collective envelope before testing in the NFAC 40- by 80-Foot Wind Tunnel. Rotor forces and blade bending moments were measured at ambient wind conditions from zero to 6.23 m/sec. The test envelope was limited to rotor speeds of 1550 to 1850 rpm and minus 13 deg to plus 20 deg of blade collective pitch. The isolated rotor performance and blade loads data are presented.

  12. LYNX: An unattended sensor system for detection of gamma-ray and neutron emissions from special nuclear materials

    SciTech Connect

    Runkle, Robert C.; Myjak, Mitchell J.; Kiff, Scott D.; Sidor, Daniel E.; Morris, Scott J.; Rohrer, John S.; Jarman, Kenneth D.; Pfund, David M.; Todd, Lindsay C.; Bowler, Ryan S.; Mullen, Crystal A.

    2009-01-21

    This manuscript profiles an unattended and fully autonomous detection system sensitive to gamma-ray and neutron emissions from special nuclear material. The LYNX design specifically targets applications that require radiation detection capabilities but possess little or no infrastructure. In these settings, users need the capability to deploy sensors for extended periods of time that analyze whatever signal-starved data can be captured, since little or no control may be exerted over measurement conditions. The fundamental sensing elements of the LYNX system are traditional NaI(Tl) and 3He detectors. The new developments reported here center on two themes: low-power electronics and computationally simple analysis algorithms capable of discriminating gamma-ray signatures indicative of special nuclear materials from those of naturally occurring radioactive material. Incorporating tripwire-detection algorithms based on gamma-ray spectral signatures into a low-power electronics package significantly improves performance in environments where sensors encounter nuisance sources.

  13. Climate, season, and social status modulate the functional response of an efficient stalking predator: the Eurasian lynx.

    PubMed

    Nilsen, Erlend B; Linnell, John D C; Odden, John; Andersen, Reidar

    2009-07-01

    1. Predation plays a major role in shaping the structure and dynamics of ecological communities, and the functional response of a predator is of crucial importance to the dynamics of any predator-prey system by linking the trophic levels. For large mammals, there is a dearth of field studies documenting functional responses, and observations at low prey density are particularly scarce. Furthermore, there is a lack of understanding about how variables such as season, social status and climate modulate the functional response curves. 2. We analysed kill rate data collected over a 10-year period based on radio-marked lynx (Lynx lynx) mainly preying on roe deer (Capreolus capreolus) along a steep prey density gradient in south-eastern Norway. 3. The asymptotic kill rate was reached at a very low prey density for both solitary individuals and family groups (i.e. females with their dependent kittens), indicative of an efficient predator. This highlights the importance of understanding the interplay between predator and prey at low prey densities. 4. A purely prey-dependent functional response was a poor descriptor of the data, as the curve was strongly modulated by season and differences between lynx of different social status. In addition, there was a clear effect of abiotic climatic factors (indexed by the North Atlantic Oscillation) on observed kill rates in the more snow-rich portion of our study area. 5. Our analysis suggests that simple functional response curves might be poor descriptors of predator consumption rates in complex natural system, and that auxiliary factors are likely to induce complexity into any predator-prey systems that would not be captured by simple deterministic approaches. PMID:19486380

  14. Discovery of a Large Scale Clumpy Structure around the Lynx Supercluster at z~1.27

    E-print Network

    Nakata, F; Shimasaku, K; Doi, M; Furusawa, H; Hamabe, M; Kimura, M; Komiyama, Yu; Miyazaki, S; Okamura, S; Ouchi, M; Sekiguchi, M; Ueda, Y; Yagi, M; Yasuda, N; Nakata, Fumiaki; Kodama, Tadayuki; Shimasaku, Kazuhiro; Doi, Mamoru; Furusawa, Hisanori; Hamabe, Masaru; Kimura, Masahiko; Komiyama, Yutaka; Miyazaki, Satoshi; Okamura, Sadanori; Ouchi, Masami; Sekiguchi, Maki; Ueda, Yoshihiro; Yagi, Masafumi; Yasuda, Naoki

    2004-01-01

    We report the discovery of a probable large scale structure composed of many galaxy clumps around the known twin clusters at z=1.26 and z=1.27 in the Lynx region. Our analysis is based on deep, panoramic, and multi-colour imaging (26.4'x24.1') in VRi'z'-bands with the Suprime-Cam on the 8.2m Subaru telescope. This unique, deep and wide-field imaging data-set allows us for the first time to map out the galaxy distribution in the highest redshift supercluster known. We apply a photometric redshift technique to extract plausible cluster members at z~1.27 down to i'=26.15 (5sigma) corresponding to \\~M*+2.5 at this redshift. From the 2-D distribution of these photometrically selected galaxies, we newly identify seven candidates of galaxy groups or clusters where the surface density of red galaxies is significantly high (>5sigma), in addition to the two known clusters. These candidates show clear red colour-magnitude sequences consistent with a passive evolution model, which suggests the existence of additional hig...

  15. Study of Galaxies in the Lynx--Cancer Void. IV. Photometric Properties

    E-print Network

    Perepelitsyna, Yu A; Kniazev, A Yu

    2014-01-01

    We present the results of a photometric study of 85 objects from the updated sample of galaxies residing in the nearby Lynx--Cancer void. We perform our photometry on u, g, r, and i-band images of the Sloan Digital Sky Survey. We determine model-independent galaxy parameters such as the integrated magnitudes and colors, effective radii and the corresponding surface brightness values, optical radii and Holmberg radii. We analyze the radial surface brightness profiles to determine the central brightness values and scale lengths of the model discs. We analyze the colors of the outer parts of the galaxies and compare them with model evolutionary tracks computed using the PEGASE2 software package. This allowed us to estimate the time T_SF elapsed since the onset of star formation, which turned out to be on the order of the cosmological time T_0 for the overwhelming majority of the galaxies studied. However, for 13 galaxies of the sample the time T_SF does not exceed T_0/2 ~ 7 Gyr, and for 7 of them T_SF -13.2. We...

  16. Study of galaxies in the Lynx-Cancer void. I. Sample description

    E-print Network

    Pustilnik, Simon A

    2011-01-01

    The evolution of galaxies is influenced by the environment in which they reside. This effect should be strongest for the least-mass and -luminosity galaxies. To study dwarf galaxies in extremely low density environments we have compiled a deep catalogue of dwarf galaxies in the nearby Lynx-Cancer void. This void hosts some of the most metal-poor dwarfs known to date. It borders the Local Volume at the negative supergalactic Z (SGZ) coordinates and has the size of more than 16 Mpc. With a distance to its centre of only 18 Mpc it is close enough to allow the search for the faintest dwarfs. Within the void 75 dwarf (-11.9 > M_B > -18.0) and 4 subluminous (-18.0 > M_B > -18.4) galaxies have been identified. We present the parameters of the void galaxies and give a detailed analysis of the completeness of the catalogue as a function of magnitude and surface brightness. The catalogue appears almost complete to M_B < -14 mag, but misses part of the fainter low surface brightness (LSB) face-on galaxies. This sampl...

  17. Study of galaxies in the Lynx-Cancer void. -- III. New extreme LSB dwarf galaxies

    E-print Network

    Pustilnik, S A; Tepliakova, A L; Kniazev, A Y

    2011-01-01

    (Abridged) We present the results of the complex study of the low surface brightness dwarf (LSBD) gas-rich galaxies J0723+3621, J0737+4724 and J0852+1350, which reside in the nearby Lynx-Cancer void. Their ratios M(HI)/L_B, according to HI data obtained with the NRT, are respectively ~3.9, ~2, ~2.6. For the two latter galaxies, we derived oxygen abundance corresponding to the value of 12+log(O/H) <~7.3, using spectra from the Russian 6m telescope and from the SDSS database. We found two additional blue LSB dwarfs, J0723+3622 and J0852+1351, which appear to be physical companions of J0723+3621 and J0852+1350 situated at the projected distances of ~12--13 kpc. The companion relative velocities, derived from the BTA spectra, are dV = +89 km/s and +30 km/s respectively. The geometry and the relative orientation of orbits and spins in these pairs indicate, respectively, prograde and polar encounters for J0723+3621 and J0852+1350. The NRT HI profiles of J0723+3621 and J0723+3622 indicate a sizable gas flow in th...

  18. VizieR Online Data Catalog: Galaxies in the Lynx-Cancer void (Pustilnik+, 2011)

    NASA Astrophysics Data System (ADS)

    Pustilnik, S. A.; Tepliakova, A. L.

    2012-02-01

    The evolution of galaxies is influenced by the environment in which they reside. This effect should be strongest for the lowest-mass and lowest-luminosity galaxies. To study dwarf galaxies in extremely low density environments, we have compiled a deep catalogue of dwarf galaxies in the nearby Lynx-Cancer void. This void hosts some of the most metal-poor dwarfs known to date. It borders the Local Volume at negative supergalactic Z(SGZ) coordinates and has a size of more than 16Mpc. With a distance to its centre of only 18Mpc, it is close enough to allow a search for the faintest dwarfs. Within the void 75 dwarf (-11.9>MB>-18.0) and four subluminous (-18.0>MB>-18.4) galaxies have been identified. We present the parameters of the void galaxies and a detailed analysis of the completeness of the catalogue as a function of magnitude and surface brightness. (3 data files).

  19. Study of galaxies in the Lynx-Cancer void - I. Sample description

    NASA Astrophysics Data System (ADS)

    Pustilnik, S. A.; Tepliakova, A. L.

    2011-08-01

    The evolution of galaxies is influenced by the environment in which they reside. This effect should be strongest for the lowest-mass and -luminosity galaxies. To study dwarf galaxies in extremely low density environments, we have compiled a deep catalogue of dwarf galaxies in the nearby Lynx-Cancer void. This void hosts some of the most metal-poor dwarfs known to date. It borders the Local Volume at negative supergalactic Z(SGZ) coordinates and has a size of more than 16 Mpc. With a distance to its centre of only 18 Mpc, it is close enough to allow a search for the faintest dwarfs. Within the void 75 dwarf (-11.9 > MB > -18.0) and four subluminous (-18.0 > MB > -18.4) galaxies have been identified. We present the parameters of the void galaxies and a detailed analysis of the completeness of the catalogue as a function of magnitude and surface brightness. The catalogue appears almost complete to MB < -14 mag, but misses part of the fainter low surface brightness (LSB) face-on galaxies. This sample of void galaxies builds the basis of forthcoming observational studies that will provide insight into the main stellar population, H I mass-to-light ratio, metallicity and age for comparison with dwarfs in higher density regions. We briefly summarize the information on the unusual objects in the void and conclude that their concentration hints that voids are environments that are favourable for finding and studying unevolved dwarf galaxies.

  20. Pre-layout AC decoupling analysis with Mentor Graphics HyperLynx

    NASA Astrophysics Data System (ADS)

    Hnatiuc, Mihaela; Iov, C?t?lin J.

    2015-02-01

    Considerable resources have been used since the humans got interested to discover the world around. Any discovery and science advance was taken tremendously amount of time, money, sometimes lives. All of these define the cost of a discovery, developing process. Getting back to electronics, this field faced in the last 20-30 years, a big boom in terms of technologies and opportunities. Thousands of equipment were developed and placed on the market. The big difference between various competitors is made at the moment by that we call the time to market. A mobile, for instance, has a time to market of around 6 months and the tendency is to have it smaller than that. That means between the concept and the first model sale, no more than 6 months should be passing. That is why new approaches are needed. The one extensively used now is the simulation. We call the simulation virtual prototyping. The virtual prototyping takes into account more than the components only. It takes into account some other project parameters that would affect the final product. Certified tools can handle such analysis. In our paper we present the case of HyperLynx, a concept developed by Mentor Graphics Company, assisting the hardware designer throughout the designing process, from thermal point of view. A test case board was analyzed at the pre-layout stage and the results presented.

  1. Interacting effects of climate change, landscape conversion, and harvest on carnivore populations at the range margin: marten and lynx in the northern Appalachians.

    PubMed

    Carroll, Carlos

    2007-08-01

    Assessing the effects of climate change on threatened species requires moving beyond simple bioclimatic models to models that incorporate interactions among climatic trends, landscape change, environmental stochasticity, and species life history. Populations of marten (Martes americana) and lynx (Lynx canadensis) in southeastern Canada and the northeastern United States represent peninsular extensions of boreal ranges and illustrate the potential impact of these threats on semi-isolated populations at the range margin. Decreased snowfall may affect marten and lynx through decreased prey vulnerability and decreased competitive advantage over sympatric carnivores. I used a spatially explicit population model to assess potential effects of predicted changes in snowfall by 2055 on regional marten and lynx populations. The models' habitat rankings were derived from previous static models that correlated regional distribution with snowfall and vegetation data. Trapping scenarios were parameterized as a 10% proportional decrease in survival, and logging scenarios were parameterized as a 10% decrease in the extent of older coniferous or mixed forest. Both species showed stronger declines in the simulations due to climate change than to overexploitation or logging. Marten populations declined 40% because of climate change, 16% because of logging, and 30% because of trapping. Lynx populations declined 59% because of climate change, 36% because of trapping, and 20% in scenarios evaluating the effects of population cycles. Climate change interacted with logging in its effects on the marten and with trapping in its effects on the lynx, increasing overall vulnerability. For both species larger lowland populations were vulnerable to climate change, which suggests that contraction may occur in the core of their current regional range as well as among smaller peripheral populations. Despite their greater data requirements compared with bioclimatic models, mesoscale spatial viability models are important tools for generating more biologically realistic hypotheses regarding biotic response to climate change. PMID:17650258

  2. Modelling potential presence of metazoan endoparasites of bobcats (Lynx rufus) using verified records.

    PubMed

    Hiestand, Shelby J; Nielsen, Clayton K; Jiménez, F Agustín

    2014-10-01

    Helminth parasites of wild and domestic felines pose a direct or potential threat to human health. Since helminths depend on multiple environmental factors that make their transmission possible, it is imperative to predict the areas where these parasites may complete the transmission to potential hosts. Bobcats, Lynx rufus (Schreberer), are the most abundant and widely-distributed wild felid species in North America. The increase of population densities of bobcats raises concerns about their importance as reservoirs of pathogens and parasites that may affect wildlife, domestic animals and humans. Our objective was to predict the potential presence of the tapeworm Taenia rileyi Loewen, 1929, the fluke Alaria marcianae (La Rue, 1917) and the roundworm Toxocara cati (Schrank, 1788) in southern Illinois. The empirical presence of these parasites in localities across the region was analysed in combination with a sampling bias layer (i.e. bobcat presence) and with environmental data: layers of water, soil, land cover, human density and climate variables in MAXENT to create maps of potential presence for these three species in an area of 46436 km2. All climatic variables were low contributors (0.0-2.0% contribution to model creation) whereas land cover surfaced as an important variable for the presence of A. marcianae (7.6%) and T. cati (6.3%); human density (4.8%) was of secondary importance for T. rileyi. Variables of importance likely represent habitat requirements necessary for the completion of parasite life cycles. Larger areas of potential presence were found for the feline specialist T. rileyi (85%) while potential presence was less likely for A. marcianae (73%), a parasite that requires multiple aquatic intermediate hosts. This study provides information to wildlife biologists and health officials regarding the potential impacts of growing bobcat populations in combination with complex and changing environmental factors. PMID:25549497

  3. A comparison of two field chemical immobilization techniques for bobcats (Lynx rufus).

    PubMed

    Rockhill, Aimee P; Chinnadurai, Sathya K; Powell, Roger A; DePerno, Christopher S

    2011-12-01

    Anesthetic protocols that allow quick induction, short processing time, and rapid reversal are necessary for researchers performing minimally invasive procedures (including morphometric measurements or attachment of radiocollars). The objective of this study was to evaluate the effectiveness of medetomidine and butorphanol as a substitute for xylazine in ketamine-based field immobilization protocols for bobcats (Lynx rufus) to reduce recovery and total field times. During 2008 and 2009, 11 bobcats were immobilized with an intramuscular combination of ketamine (10 mg/kg)-xylazine (0.75 mg/kg) (KX) or ketamine (4 mg/kg)-medetomidine (40 mcg/kg)-butorphanol (0.4 mg/kg) (KMB). Time to initial sedation, recumbency, and full anesthesia were recorded postinjection. Time to head up, sternal, standing, full recovery, and total processing times were recorded post-reversal. Throughout anesthesia, heart rate (HR), respiratory rate (RR), rectal temperature (RT), and noninvasive hemoglobin-oxygen saturation (SpO2) were recorded at 5-min intervals. The KX combination had a median time to full anesthesia of 10 min, a median recovery time of 46 min, and a median total processing time of 83 min. Alternatively, the KMB combination had a median time to full anesthesia of 21 min, a median recovery time of 18 min, and a median total processing time of 64 min. The KX protocol produced a median HR of 129 beats/min, RR of 25 breaths/min, RT of 38.3 degrees C, and SpO2 of 93%. The KMB protocol produced a median HR of 97 beats/min, RR of 33 breaths/min, RT of 38.4 degrees C, and SpO2 of 92%. Though both protocols provided safe and reliable sedation, the benefits of using medetomidine and butorphanol to lower ketamine doses and decrease processing time for brief nonsurgical sedation of bobcats in the field are presented. PMID:22204051

  4. Gene flow and pathogen transmission among bobcats (Lynx rufus) in a fragmented urban landscape.

    PubMed

    Lee, Justin S; Ruell, Emily W; Boydston, Erin E; Lyren, Lisa M; Alonso, Robert S; Troyer, Jennifer L; Crooks, Kevin R; Vandewoude, Sue

    2012-04-01

    Urbanization can result in the fragmentation of once contiguous natural landscapes into a patchy habitat interspersed within a growing urban matrix. Animals living in fragmented landscapes often have reduced movement among habitat patches because of avoidance of intervening human development, which potentially leads to both reduced gene flow and pathogen transmission between patches. Mammalian carnivores with large home ranges, such as bobcats (Lynx rufus), may be particularly sensitive to habitat fragmentation. We performed genetic analyses on bobcats and their directly transmitted viral pathogen, feline immunodeficiency virus (FIV), to investigate the effects of urbanization on bobcat movement. We predicted that urban development, including major freeways, would limit bobcat movement and result in genetically structured host and pathogen populations. We analysed molecular markers from 106 bobcats and 19 FIV isolates from seropositive animals in urban southern California. Our findings indicate that reduced gene flow between two primary habitat patches has resulted in genetically distinct bobcat subpopulations separated by urban development including a major highway. However, the distribution of genetic diversity among FIV isolates determined through phylogenetic analyses indicates that pathogen genotypes are less spatially structured-exhibiting a more even distribution between habitat fragments. We conclude that the types of movement and contact sufficient for disease transmission occur with enough frequency to preclude structuring among the viral population, but that the bobcat population is structured owing to low levels of effective bobcat migration resulting in gene flow. We illustrate the utility in using multiple molecular markers that differentially detect movement and gene flow between subpopulations when assessing connectivity. PMID:22335296

  5. Evolution of puma lentivirus in bobcats (Lynx rufus) and mountain lions (Puma concolor) in North America.

    PubMed

    Lee, Justin S; Bevins, Sarah N; Serieys, Laurel E K; Vickers, Winston; Logan, Ken A; Aldredge, Mat; Boydston, Erin E; Lyren, Lisa M; McBride, Roy; Roelke-Parker, Melody; Pecon-Slattery, Jill; Troyer, Jennifer L; Riley, Seth P; Boyce, Walter M; Crooks, Kevin R; VandeWoude, Sue

    2014-07-01

    Mountain lions (Puma concolor) throughout North and South America are infected with puma lentivirus clade B (PLVB). A second, highly divergent lentiviral clade, PLVA, infects mountain lions in southern California and Florida. Bobcats (Lynx rufus) in these two geographic regions are also infected with PLVA, and to date, this is the only strain of lentivirus identified in bobcats. We sequenced full-length PLV genomes in order to characterize the molecular evolution of PLV in bobcats and mountain lions. Low sequence homology (88% average pairwise identity) and frequent recombination (1 recombination breakpoint per 3 isolates analyzed) were observed in both clades. Viral proteins have markedly different patterns of evolution; sequence homology and negative selection were highest in Gag and Pol and lowest in Vif and Env. A total of 1.7% of sites across the PLV genome evolve under positive selection, indicating that host-imposed selection pressure is an important force shaping PLV evolution. PLVA strains are highly spatially structured, reflecting the population dynamics of their primary host, the bobcat. In contrast, the phylogeography of PLVB reflects the highly mobile mountain lion, with diverse PLVB isolates cocirculating in some areas and genetically related viruses being present in populations separated by thousands of kilometers. We conclude that PLVA and PLVB are two different viral species with distinct feline hosts and evolutionary histories. Importance: An understanding of viral evolution in natural host populations is a fundamental goal of virology, molecular biology, and disease ecology. Here we provide a detailed analysis of puma lentivirus (PLV) evolution in two natural carnivore hosts, the bobcat and mountain lion. Our results illustrate that PLV evolution is a dynamic process that results from high rates of viral mutation/recombination and host-imposed selection pressure. PMID:24741092

  6. Evolution of Puma Lentivirus in Bobcats (Lynx rufus) and Mountain Lions (Puma concolor) in North America

    PubMed Central

    Bevins, Sarah N.; Serieys, Laurel E. K.; Vickers, Winston; Logan, Ken A.; Aldredge, Mat; Boydston, Erin E.; Lyren, Lisa M.; McBride, Roy; Roelke-Parker, Melody; Pecon-Slattery, Jill; Troyer, Jennifer L.; Riley, Seth P.; Boyce, Walter M.; Crooks, Kevin R.; VandeWoude, Sue

    2014-01-01

    ABSTRACT Mountain lions (Puma concolor) throughout North and South America are infected with puma lentivirus clade B (PLVB). A second, highly divergent lentiviral clade, PLVA, infects mountain lions in southern California and Florida. Bobcats (Lynx rufus) in these two geographic regions are also infected with PLVA, and to date, this is the only strain of lentivirus identified in bobcats. We sequenced full-length PLV genomes in order to characterize the molecular evolution of PLV in bobcats and mountain lions. Low sequence homology (88% average pairwise identity) and frequent recombination (1 recombination breakpoint per 3 isolates analyzed) were observed in both clades. Viral proteins have markedly different patterns of evolution; sequence homology and negative selection were highest in Gag and Pol and lowest in Vif and Env. A total of 1.7% of sites across the PLV genome evolve under positive selection, indicating that host-imposed selection pressure is an important force shaping PLV evolution. PLVA strains are highly spatially structured, reflecting the population dynamics of their primary host, the bobcat. In contrast, the phylogeography of PLVB reflects the highly mobile mountain lion, with diverse PLVB isolates cocirculating in some areas and genetically related viruses being present in populations separated by thousands of kilometers. We conclude that PLVA and PLVB are two different viral species with distinct feline hosts and evolutionary histories. IMPORTANCE An understanding of viral evolution in natural host populations is a fundamental goal of virology, molecular biology, and disease ecology. Here we provide a detailed analysis of puma lentivirus (PLV) evolution in two natural carnivore hosts, the bobcat and mountain lion. Our results illustrate that PLV evolution is a dynamic process that results from high rates of viral mutation/recombination and host-imposed selection pressure. PMID:24741092

  7. Presence of Echinococcus oligarthrus (Diesing, 1863) Lühe, 1910 in Lynx rufus texensis Allen, 1895 from San Fernando, Tamaulipas State, in north-east Mexico

    Microsoft Academic Search

    Narciso Salinas-López; Fernando Jiménz-Guzm?; Alejandro Cruz-Reyes

    1996-01-01

    A bobcat was found recently killed on “Highway 101” near the town of San Fernando, Tamanlipas State, Mexico (100 km south of Brownsville, TX, U.S.A.). The cat (Lynx rufus texensis) was parasitized by several species of meassodes and trematodes, but mainly by a cestode, Echinococcus oligarthrus. The diagnostic characterintics of this cestode are described and illnstrated. E. oligarthrus has not

  8. Quantifying home range habitat requirements for bobcats (Lynx rufus) in Vermont, USA

    USGS Publications Warehouse

    Donovan, T.M.; Freeman, M.; Abouelezz, H.; Royar, K.; Howard, A.; Mickey, R.

    2011-01-01

    We demonstrate how home range and habitat use analysis can inform landscape-scale conservation planning for the bobcat, Lynx rufus, in Vermont USA. From 2005 to 2008, we outfitted fourteen bobcats with GPS collars that collected spatially explicit locations from individuals every 4. h for 3-4. months. Kernel home range techniques were used to estimate home range size and boundaries, and to quantify the utilization distribution (UD), which is a spatially explicit, topographic mapping of how different areas within the home range are used. We then used GIS methods to quantify both biotic (e.g. habitat types, stream density) and abiotic (e.g. slope) resources within each bobcat's home range. Across bobcats, upper 20th UD percentiles (core areas) had 18% less agriculture, 42% less development, 26% more bobcat habitat (shrub, deciduous, coniferous forest, and wetland cover types), and 33% lower road density than lower UD percentiles (UD valleys). For each bobcat, we used Akaike's Information Criterion (AIC) to evaluate and compare 24 alternative Resource Utilization Functions (hypotheses) that could explain the topology of the individual's UD. A model-averaged population-level Resource Utilization Function suggested positive responses to shrub, deciduous, coniferous forest, and wetland cover types within 1. km of a location, and negative responses to roads and mixed forest cover types within 1. km of a location. Applying this model-averaged function to each pixel in the study area revealed habitat suitability for bobcats across the entire study area, with suitability scores ranging between -1.69 and 1.44, where higher values were assumed to represent higher quality habitat. The southern Champlain Valley, which contained ample wetland and shrub habitat, was a concentrated area of highly suitable habitat, while areas at higher elevation areas were less suitable. Female bobcat home ranges, on average, had an average habitat suitability score of near 0, indicating that home ranges consisted of both beneficial and detrimental habitat types. We discuss the application of habitat suitability mapping and home range requirements for bobcat conservation and landscape scale management. ?? 2011.

  9. Study of galaxies in the Lynx-Cancer void. IV. Photometrical properties.

    NASA Astrophysics Data System (ADS)

    Perepelitsyna, Y. A.; Pustilnik, S. A.; Kniazev, A. Y.

    We present the results of a photometric study of 85 objects from the updated sample of galaxies residing in the nearby Lynx--Cancer void. We perform our photometry on u, g, r, and i-band images of the Sloan Digital Sky Survey. We determine model-independent galaxy parameters such as the integrated magnitudes and colors, effective radii and the corresponding surface brightness values, optical radii and Holmberg radii. We analyze the radial surface brightness profiles to determine the central brightness values and scale lengths of the model discs. We analyze the colors of the outer parts of the galaxies and compare them with model evolutionary tracks computed using the PEGASE2 software package. This allowed us to estimate the time T_SF elapsed since the onset of star formation, which turned out to be on the order of the cosmological time T_0 for the overwhelming majority of the galaxies studied. However, for 13 galaxies of the sample the time T_SF does not exceed T_0/2 ~ 7 Gyr, and for 7 of them T_SF < 3.5 Gyr. The latter are mostly unevolved objects dominated by low-luminosity galaxies with M_B > -13.2. We use the integrated magnitudes and colors to estimate the stellar masses of the galaxies. We estimate the parameter M(HI)/L_B and the gas mass fractions for void galaxies with known HI-line fluxes. A small subgroup (about 10%) of the gas-richest void galaxies with M(HI)/L_B > 2.5 has gas mass fractions that reach 94-99%. The outer regions of many of these galaxies show atypically blue colors. To test various statistical differences between void galaxies and galaxies from the samples selected using more general criteria, we compare some of the parameters of void galaxies with similar data for the sample of 195 galaxies from the Equatorial Survey (ES) based on a part of the HIPASS blind HI survey. abridged

  10. SPICES II. Optical and Near-Infrared Identifications of Faint X-Ray Sources from Deep Chandra Observations of Lynx

    E-print Network

    Daniel Stern; Paolo Tozzi; S. A. Stanford; Piero Rosati; Brad Holden; Peter Eisenhardt; Richard Elston; K. L. Wu; Andrew Connolly; Hyron Spinrad; Steve Dawson; Arjun Dey; Frederic H. Chaffee

    2002-03-22

    We present our first results on field X-ray sources detected in a deep, 184.7 ks observation with the ACIS-I camera on Chandra. The observations target the Lynx field of SPICES, and contains three known X-ray-emitting clusters out to z=1.27. Not including the known clusters, in the 17'x17' ACIS-I field we detect 132 sources in the 0.5-2 keV (soft) X-ray band down to a limiting flux of \\~1.7e-16 erg/cm2/s and 111 sources in the 2-10 keV (hard) X-ray band down to a limiting flux of ~1.3e-15 erg/cm2/s. The combined catalog contains a total of 153 sources, of which 42 are detected only in the soft band and 21 are detected only in the hard band. Confirming previous Chandra results, we find that the fainter sources have harder X-ray spectra, providing a consistent solution to the long-standing `spectral paradox'. From deep optical and near-infrared follow-up data, 77% of the X-ray sources have optical counterparts to I=24 and 71% of the X-ray sources have near-infrared counterparts to K=20. Four of the 24 sources in the near-IR field are associated with extremely red objects (EROs; I-K>4). We have obtained spectroscopic redshifts with the Keck telescopes of 18 of the Lynx Chandra sources. These sources comprise a mix of broad-lined active galaxies, apparently normal galaxies, and two late-type Galactic dwarfs. Intriguingly, one Galactic source is identified with an M7 dwarf exhibiting non-transient, hard X-ray emission. We review non-AGN mechanisms to produce X-ray emission and discuss properties of the Lynx Chandra sample in relation to other samples of X-ray and non-X-ray sources.

  11. Observation of Helicobacter-like organisms in gastric mucosa of grey foxes (Urocyon cinereoargenteus) and bobcats (Lynx rufus).

    PubMed

    Hamir, Amir N; Stasko, Judi; Rupprecht, Charles E

    2004-04-01

    Archival specimens of gastric mucosa of 10 raccoons (Procyon lotor), 9 porcupines (Erethizon dorsatum), 6 grey foxes (Urocyon cinereoargenteus), 6 bobcats (Lynx rufus), 4 skunks (Mephitis mephitis), and 3 black bears (Ursus americanus) were microscopically examined for evidence of Helicobacter-like organisms. Such organisms were seen in the specimens from the grey foxes and bobcats only. Histochemical stains (modified Steiner and carbol fuchsin methods) revealed long spiral organisms within lumina of gastric glands; however, neither gross nor microscopic lesions were observed. By electron microscopy (EM), the organisms were found to be free in the glandular lumina and were seen occasionally in the cytoplasm of gastric epithelial cells. Morphologically, 2 different phenotypes of spiral organisms were identified by EM. The organisms associated with bobcats appeared to be more tightly coiled than those seen in grey foxes. The presence of Helicobacter-like organisms in the gastric mucosa of grey foxes has not previously been described. PMID:15188962

  12. Observation of Helicobacter-like organisms in gastric mucosa of grey foxes (Urocyon cinereoargenteus) and bobcats (Lynx rufus)

    PubMed Central

    2004-01-01

    Abstract Archival specimens of gastric mucosa of 10 raccoons (Procyon lotor), 9 porcupines (Erethizon dorsatum), 6 grey foxes (Urocyon cinereoargenteus), 6 bobcats (Lynx rufus), 4 skunks (Mephitis mephitis), and 3 black bears (Ursus americanus) were microscopically examined for evidence of Helicobacter-like organisms. Such organisms were seen in the specimens from the grey foxes and bobcats only. Histochemical stains (modified Steiner and carbol fuchsin methods) revealed long spiral organisms within lumina of gastric glands; however, neither gross nor microscopic lesions were observed. By electron microscopy (EM), the organisms were found to be free in the glandular lumina and were seen occasionally in the cytoplasm of gastric epithelial cells. Morphologically, 2 different phenotypes of spiral organisms were identified by EM. The organisms associated with bobcats appeared to be more tightly coiled than those seen in grey foxes. The presence of Helicobacter-like organisms in the gastric mucosa of grey foxes has not previously been described. PMID:15188962

  13. Optical Identification of the ASCA Lynx Deep Survey: An Association of QSOs and a Supercluster at z=1.3?

    E-print Network

    Ohta, K; Ueda, Y; Yamada, T; Nakanishi, K; Dalton, G B; Ogasaka, Y; Kii, T; Hayashida, K; Ohta, Kouji; Akiyama, Masayuki; Ueda, Yoshihiro; Yamada, Toru; Nakanishi, Kouichiro; Dalton, Gavin B.; Ogasaka, Yasushi; Kii, Tsuneo; Hayashida, Kiyoshi

    2003-01-01

    Results of optical identification of the ASCA Lynx deep survey are presented. Six X-ray sources are detected in the 2-7 keV band using the SIS in a 20'x20' field of view with fluxes larger than ~4x10^{-14} erg s-1 cm-2 in the band. Follow-up optical spectroscopic observations were made, and five out of six sources are identified with AGNs/QSOs at redshifts of 0.5-1.3. We also identify two more additional X-ray sources detected in a soft X-ray band with AGNs/QSOs. It is found that three QSOs identified are located at z~1.3. Two rich clusters and several groups of galaxies are also placed at the same redshift in the surveyed field, and projected separations between the QSOs and the clusters are 3-8 Mpc at the redshift.

  14. Weak-Lensing Detection at z~1.3: Measurement of the Two Lynx Clusters with Advanced Camera for Surveys

    E-print Network

    Jee, M J; Ford, H C; Holden, B; Illingworth, G D; Mei, S; White, R L

    2006-01-01

    (Abridged) We present a HST/ACS weak-lensing study of RX J0849+4452 and RX J0848+4453, the two most distant (at z=1.26 and z=1.27, respectively) clusters yet measured with weak-lensing. The two clusters are separated by ~4' from each other and appear to form a supercluster in the Lynx field. Using our deep ACS F775W and F850LP imaging, we detected weak-lensing signals around both clusters at ~4 sigma levels. The mass distribution indicated by the reconstruction map is in good spatial agreement with the cluster galaxies. From the SIS fitting, we determined that RX J0849+4452 and RX J0848+4453 have similar projected masses of ~2.0x10^14 solar mass and ~2.1x10^14 solar mass, respectively, within a 0.5 Mpc (~60") aperture radius.

  15. Optical Identification of the ASCA Lynx Deep Survey: An Association of QSOs and a Supercluster at z=1.3?

    E-print Network

    Kouji Ohta; Masayuki Akiyama; Yoshihiro Ueda; Toru Yamada; Kouichiro Nakanishi; Gavin B. Dalton; Yasushi Ogasaka; Tsuneo Kii; Kiyoshi Hayashida

    2003-08-05

    Results of optical identification of the ASCA Lynx deep survey are presented. Six X-ray sources are detected in the 2-7 keV band using the SIS in a 20'x20' field of view with fluxes larger than ~4x10^{-14} erg s-1 cm-2 in the band. Follow-up optical spectroscopic observations were made, and five out of six sources are identified with AGNs/QSOs at redshifts of 0.5-1.3. We also identify two more additional X-ray sources detected in a soft X-ray band with AGNs/QSOs. It is found that three QSOs identified are located at z~1.3. Two rich clusters and several groups of galaxies are also placed at the same redshift in the surveyed field, and projected separations between the QSOs and the clusters are 3-8 Mpc at the redshift.

  16. Weak-Lensing Detection at z~1.3: Measurement of the Two Lynx Clusters with Advanced Camera for Surveys

    E-print Network

    M. J. Jee; R. L. White; H. C. Ford; G. D. Illingworth; J. P. Blakeslee; B. Holden; S. Mei

    2006-01-16

    (Abridged) We present a HST/ACS weak-lensing study of RX J0849+4452 and RX J0848+4453, the two most distant (at z=1.26 and z=1.27, respectively) clusters yet measured with weak-lensing. The two clusters are separated by ~4' from each other and appear to form a supercluster in the Lynx field. Using our deep ACS F775W and F850LP imaging, we detected weak-lensing signals around both clusters at ~4 sigma levels. The mass distribution indicated by the reconstruction map is in good spatial agreement with the cluster galaxies. From the SIS fitting, we determined that RX J0849+4452 and RX J0848+4453 have similar projected masses of ~2.0x10^14 solar mass and ~2.1x10^14 solar mass, respectively, within a 0.5 Mpc (~60") aperture radius.

  17. Cytauxzoon felis infections are present in bobcats (Lynx rufus) in a region where cytauxzoonosis is not recognized in domestic cats.

    PubMed

    Birkenheuer, Adam J; Marr, Henry S; Warren, Camille; Acton, Anne E; Mucker, Eric M; Humphreys, Jan G; Tucker, Melissa D

    2008-05-01

    This study was performed to determine the prevalence of Cytauxzoon felis (C. felis) infections in bobcats (Lynx rufus) from a region where C. felis is recognized in domestic cats, North Carolina (NC), and a region where C. felis is not recognized in domestic cats, Pennsylvania (PA). Samples from NC (n=32) were obtained post-mortem via cardiac puncture from legally trapped bobcats. Samples from PA (n=70) were collected post-mortem onto Nobuto blood collecting strips by the PA Game Commission. Each sample was tested using a C. felis specific PCR assay as well as a PCR assay targeting host DNA to rule out the presence of PCR inhibitors. Three samples were excluded due to the presence of PCR inhibitors. Thirty-three percent (10/30) of the samples from NC and 7% (5/69) of the samples from PA tested positive for the presence of C. felis. The proportion of C. felis positive bobcats from NC was significantly different than that from PA (P<0.005). Despite the lower prevalence of C. felis infections in bobcats from PA this finding is unique and indicates the potential for C. felis infections in domestic cats in the northeastern USA if the appropriate tick vectors are present. Veterinary practitioners in PA should be on alert for cytauxzoonosis in domestic cats. Further studies about the epidemiology and transmission of C. felis infections among both domestic cats and bobcats are needed. PMID:18295403

  18. Variability in assays used for detection of lentiviral infection in bobcats (Lynx rufus), pumas (Puma concolor), and ocelots (Leopardus pardalis).

    PubMed

    Franklin, Samuel P; Troyer, Jennifer L; Terwee, Julie A; Lyren, Lisa M; Kays, Roland W; Riley, Seth P D; Boyce, Walter M; Crooks, Kevin R; Vandewoude, Sue

    2007-10-01

    Although lentiviruses similar to feline immunodeficiency virus (FIV) are known to infect numerous felid species, the relative utility of assays used for detecting lentiviral infection has not been compared for many of these hosts. We tested bobcats (Lynx rufus), pumas (Felis concolor), and ocelots (Leopardus pardalis) for exposure to lentivirus using five different assays: puma lentivirus (PLV), African lion lentivirus (LLV), and domestic cat FIV-based immunoblots, a commercially available enzyme-linked immunosorbent assay (ELISA) kit, and nested polymerase chain reaction (PCR). Puma lentivirus immunoblots identified more seropositive individuals than the other antibody-detection assays. The commercial ELISA provided a fair ability to recognize seropositive samples when compared with PLV immunoblot for screening bobcats and ocelots, but not pumas. Polymerase chain reaction identified fewer positive samples than PLV immunoblot for all three species. Immunoblot results were equivalent whether the sample tested was serum, plasma, or whole blood. The results from this study and previous investigations suggest that the PLV immunoblot has the greatest ability to detect reactive samples when screening wild felids of North America and is unlikely to produce false positive results. However, the commercial ELISA kit may provide an adequate alternative for screening of some species and is more easily adapted to field conditions. PMID:17984266

  19. Variability in assays used for detection of lentiviral infection in bobcats (Lynx rufus), pumas (Puma concolor), and ocelots (Leopardus pardalis)

    USGS Publications Warehouse

    Franklin, S.P.; Troyer, J.L.; TerWee, J.A.; Lyren, L.M.; Kays, R.W.; Riley, S.P.D.; Boyce, W.M.; Crooks, K.R.; VandeWoude, S.

    2007-01-01

    Although lentiviruses similar to feline immunodeficiency virus (FIV) are known to infect numerous felid species, the relative utility of assays used for detecting lentiviral infection has not been compared for many of these hosts. We tested bobcats (Lynx rufus), pumas (Felis concolor), and ocelots (Leopardus pardalis) for exposure to lentivirus using five different assays: puma lentivirus (PLV), African lion lentivirus (LLV), and domestic cat FIV-based immunoblots, a commercially available enzyme-linked immunosorbent assay (ELISA) kit, and nested polymerase chain reaction (PCR). Puma lentivirus immunoblots identified more seropositive individuals than the other antibody-detection assays. The commercial ELISA provided a fair ability to recognize seropositive samples when compared with PLV immunoblot for screening bobcats and ocelots, but not pumas. Polymerase chain reaction identified fewer positive samples than PLV immunoblot for all three species. Immunoblot results were equivalent whether the sample tested was serum, plasma, or whole blood. The results from this study and previous investigations suggest that the PLV immunoblot has the greatest ability to detect reactive samples when screening wild felids of North America and is unlikely to produce false positive results. However, the commercial ELISA kit may provide ap adequate alternative for screening of some species and is more easily adapted to field conditions. ?? Wildlife Disease Association 2007.

  20. Deep GMRT 150 MHz observations of the LBDS-Lynx region: Ultra-Steep Spectrum Radio Sources

    E-print Network

    Ishwara-Chandra, C H; Wadadekar, Y; Pal, S; Windhorst, R

    2010-01-01

    It has been known for nearly three decades that high redshift radio galaxies exhibit steep radio spectra, and hence ultra-steep spectrum radio sources provide candidates for high-redshift radio galaxies. Nearly all radio galaxies with z > 3 have been found using this redshift-spectral index correlation. We have started a programme with GMRT to exploit this correlation at flux density levels about 10 to 100 times deeper than the known high-redshift radio galaxies which were identified primarily using the already available radio catalogues. In our programme, we have obtained deep, high resolution radio observations at 150 MHz with GMRT for several 'deep' fields which are well studied at higher radio frequencies and in other bands of the electromagnetic spectrum, with an aim to detect candidate high redshift radio galaxies. In this paper we present results from the deep 150 MHz observations of LBDS-Lynx field, which has been already imaged at 327, 610 and 1412 MHz with the WSRT and at 1400 and 4860 MHz with the ...

  1. Discovery of an extremely gas-rich dwarf triplet near the center of the Lynx-Cancer void

    E-print Network

    Chengalur, Jayaram N

    2012-01-01

    Giant Metrewave Radio Telescope (GMRT) HI observations, done as part of an ongoing study of dwarf galaxies in the Lynx-Cancer void, resulted in the discovery of a triplet of extremely gas rich galaxies located near the centre of the void.The triplet members SDSS J0723+3621, J0723+3622 and J0723+3624 have absolute magnitudes M_B of -14.2, -11.9 and -9.7 and M(HI)/L_B of \\sim 2.9, ~10 and ~25, respectively. The gas mass fractions, as derived from the SDSS photometry and the GMRT data are 0.93, 0.997, 0.997 respectively. The faintest member of this triplet SDSS J0723+3624 is one of the most gas rich galaxies known. We find that all three galaxies deviate significantly from the Tully-Fisher relation, but follow the baryonic Tully-Fisher relation. All three galaxies also have a baryon fraction that is significantly smaller than the cosmic baryon fraction. For the largest galaxy in the triplet, this is in contradiction to numerical simulations. The discovery of this very unique dwarf triplet lends support to the id...

  2. SPICES II. Optical and Near-Infrared Identifications of Faint X-Ray Sources from Deep Chandra Observations of Lynx

    E-print Network

    Stern, D; Stanford, S A; Rosati, P; Holden, B; Eisenhardt, P; Elston, R; Wu, K L; Connolly, A; Spinrad, H; Dawson, S; Dey, A; Chaffee, F H; Stern, Daniel; Tozzi, Paolo; Rosati, Piero; Holden, Brad; Eisenhardt, Peter; Elston, Richard; Connolly, Andrew; Spinrad, Hyron; Dawson, Steve; Dey, Arjun; Chaffee, Frederic H.

    2002-01-01

    We present our first results on field X-ray sources detected in a deep, 184.7 ks observation with the ACIS-I camera on Chandra. The observations target the Lynx field of SPICES, and contains three known X-ray-emitting clusters out to z=1.27. Not including the known clusters, in the 17'x17' ACIS-I field we detect 132 sources in the 0.5-2 keV (soft) X-ray band down to a limiting flux of \\~1.7e-16 erg/cm2/s and 111 sources in the 2-10 keV (hard) X-ray band down to a limiting flux of ~1.3e-15 erg/cm2/s. The combined catalog contains a total of 153 sources, of which 42 are detected only in the soft band and 21 are detected only in the hard band. Confirming previous Chandra results, we find that the fainter sources have harder X-ray spectra, providing a consistent solution to the long-standing `spectral paradox'. From deep optical and near-infrared follow-up data, 77% of the X-ray sources have optical counterparts to I=24 and 71% of the X-ray sources have near-infrared counterparts to K=20. Four of the 24 sources i...

  3. Discovery of an extremely gas rich dwarf triplet near the centre of the Lynx-Cancer void

    NASA Astrophysics Data System (ADS)

    Chengalur, J. N.; Pustilnik, S. A.

    2013-01-01

    The Giant Metrewave Radio Telescope (GMRT) H i observations, done as part of an ongoing study of dwarf galaxies in the Lynx-Cancer void, resulted in the discovery of a triplet of extremely gas rich galaxies located near the centre of the void. The triplet members SDSS J0723+3621, SDSS J0723+3622 and SDSS J0723+3624 have absolute magnitudes MB of -14.2, -11.9 and -9.7 and M(H i)/LB of ˜2.9, ˜10 and ˜25, respectively. The gas mass fractions, as derived from the Sloan Digital Sky Survey (SDSS) photometry and the GMRT data, are 0.93, 0.997 and 0.997, respectively. The faintest member of this triplet, SDSS J0723+3624, is one of the most gas rich galaxies known. We find that all three galaxies deviate significantly from the Tully-Fisher relation, but follow the baryonic Tully-Fisher relation. All three galaxies also have a baryon fraction that is significantly smaller than the cosmic baryon fraction. For the largest galaxy in the triplet, this is in contradiction to numerical simulations. The discovery of this very unique dwarf triplet lends further support to the idea that the void environment is conducive to the formation of galaxies with unusual properties. These observations provide further motivation to do deep searches of voids for a `hidden' very gas rich galaxy population with MB ? -11.

  4. VizieR Online Data Catalog: LBDS-Lynx region GMRT 150-MHz obs. (Ishwara-Chandra+, 2010)

    NASA Astrophysics Data System (ADS)

    Ishwara-Chandra, C. H.; Sirothia, S. K.; Wadadekar, Y.; Pal, S.; Windhorst, R.

    2011-08-01

    It has been known for nearly three decades that high-redshift radio galaxies exhibit steep radio spectra, and hence ultrasteep spectrum radio sources provide candidates for high-redshift radio galaxies. Nearly all radio galaxies with z>3 have been found using this redshift-spectral index correlation. We have started a programme with the Giant Metrewave Radio Telescope (GMRT) to exploit this correlation at flux density levels about 10 to 100 times deeper than the known high-redshift radio galaxies which were identified primarily using the already available radio catalogues. In our programme, we have obtained deep, high-resolution radio observations at 150MHz with GMRT for several "deep" fields which are well studied at higher radio frequencies and in other bands of the electromagnetic spectrum, with an aim to detect candidate high-redshift radio galaxies. In this paper we present results from the deep 150-MHz observations of the LBDS-Lynx field (Leiden-Berkeley Deep Survey), which has been already imaged at 327, 610 and 1412MHz with the Westerbork Synthesis Radio Telescope and at 1400 and 4860MHz with the Very Large Array. (2 data files).

  5. Bobcats ( Lynx rufus) as a Model Organism to Investigate the Effects of Roads on Wide-Ranging Carnivores

    NASA Astrophysics Data System (ADS)

    Litvaitis, John A.; Reed, Gregory C.; Carroll, Rory P.; Litvaitis, Marian K.; Tash, Jeffrey; Mahard, Tyler; Broman, Derek J. A.; Callahan, Catherine; Ellingwood, Mark

    2015-06-01

    We are using bobcats ( Lynx rufus) as a model organism to examine how roads affect the abundance, distribution, and genetic structure of a wide-ranging carnivore. First, we compared the distribution of bobcat-vehicle collisions to road density and then estimated collision probabilities for specific landscapes using a moving window with road-specific traffic volume. Next, we obtained incidental observations of bobcats from the public, camera-trap detections, and locations of bobcats equipped with GPS collars to examine habitat selection. These data were used to generate a cost-surface map to investigate potential barrier effects of roads. Finally, we have begun an examination of genetic structure of bobcat populations in relation to major road networks. Distribution of vehicle-killed bobcats was correlated with road density, especially state and interstate highways. Collision models suggested that some regions may function as demographic sinks. Simulated movements in the context of the cost-surface map indicated that some major roads may be barriers. These patterns were supported by the genetic structure of bobcats. The sharpest divisions among genetically distinct demes occurred along natural barriers (mountains and large lakes) and in road-dense regions. In conclusion, our study has demonstrated the utility of using bobcats as a model organism to understand the variety of threats that roads pose to a wide-ranging species. Bobcats may also be useful as one of a group of focal species while developing approaches to maintain existing connectivity or mitigate the negative effects of roads.

  6. Presence of Echinococcus oligarthrus (Diesing, 1863) Lühe, 1910 in Lynx rufus texensis Allen, 1895 from San Fernando, Tamaulipas state, in north-east Mexico.

    PubMed

    Salinas-López, N; Jiménez-Guzmán, F; Cruz-Reyes, A

    1996-07-01

    A bobcat was found recently killed on "Highway 101" near the town of San Fernando, Tamaulipas State, Mexico (100 km south of Brownsville, TX, U.S.A.). The cat (Lynx rufus texensis) was parasitized by several species of nematodes and trematodes, but mainly by a cestode, Echinococcus oligarthrus. The diagnostic characteristics of this cestode are described and illustrated. E. oligarthrus has not been reported previously in North America. This is the first time that the strobilar stage has been recovered from a "bobcat". A potential public health problem may be raised by the presence of this cestode in Mexico. PMID:8894772

  7. Serum chemistry, hematologic, and post-mortem findings in free-ranging bobcats (Lynx rufus) with notoedric mange.

    PubMed

    Serieys, Laurel E K; Foley, Janet; Owens, Sean; Woods, Leslie; Boydston, Erin E; Lyren, Lisa M; Poppenga, Robert H; Clifford, Deana L; Stephenson, Nicole; Rudd, Jaime; Riley, Seth P D

    2013-12-01

    Notoedric mange was responsible for a population decline of bobcats ( Lynx rufus ) in 2 Southern California counties from 2002-2006 and is now reported to affect bobcats in Northern and Southern California. With this study we document clinical laboratory and necropsy findings for bobcats with mange. Bobcats in this study included free-ranging bobcats with mange (n = 34), a control group of free-ranging bobcats without mange (n = 11), and a captive control group of bobcats without mange (n = 19). We used 2 control groups to evaluate potential anomalies due to capture stress or diet. Free-ranging healthy and mange-infected bobcats were trapped or salvaged. Animals were tested by serum biochemistry, complete blood count, urine protein and creatinine, body weight, necropsy, and assessment for anticoagulant rodenticide residues in liver tissue. Bobcats with severe mange were emaciated, dehydrated, and anemic with low serum creatinine, hyperphosphatemia, hypoglycemia, hypernatremia, and hyperchloremia, and sometimes septicemic when compared to control groups. Liver enzymes and leukocyte counts were elevated in free-ranging, recently captured bobcats whether or not they were infested with mange, suggesting capture stress. Bobcats with mange had lower levels of serum cholesterol, albumin, globulin, and total protein due to protein loss likely secondary to severe dermatopathy. Renal insufficiency was unlikely in most cases, as urine protein:creatinine ratios were within normal limits. A primary gastrointestinal loss of protein or blood was possible in a few cases, as evidenced by elevated blood urea nitrogen, anemia, intestinal parasitism, colitis, gastric hemorrhage, and melena. The prevalence of exposure to anticoagulant rodenticides was 100% (n = 15) in bobcats with mange. These findings paint a picture of debilitating, multisystemic disease with infectious and toxic contributing factors that can progress to death in individuals and potential decline in populations. PMID:23957865

  8. Seroprevalence of Toxoplasma gondii in American free-ranging or captive pumas (Felis concolor) and bobcats (Lynx rufus).

    PubMed

    Kikuchi, Yoko; Chomel, Bruno B; Kasten, Rickie W; Martenson, Janice S; Swift, Pamela K; O'Brien, Stephen J

    2004-02-26

    Toxoplasma gondii is a major zoonotic agent infecting a wide range of mammals, including wild felids. Like domestic cats, wild felids are involved in the complete infective cycle of T. gondii, as they can host in their gastrointestinal tract sexually mature parasites and shed infective oocysts in their feces. In order to evaluate the importance of this wildlife reservoir, 438 serum samples collected between 1984 and 1999 from 438 pumas (Felis concolor) and from 58 bobcats (Lynx rufus) from North America, Central America and South America were screened for antibodies to T. gondii. The overall prevalence of T. gondii antibodies was 22.4% in pumas and 51.7% in bobcats, with regional variations. Adults were more likely to be seropositive than juveniles and kittens (prevalence ratio (PR) = 2.61; confidence interval (CI) = 1.15, 4.04). In the US, pumas from the southwestern states (Arizona, California and New Mexico) were more likely to be seropositive for T. gondii ( PR = 2.61; 95% CI = 1.32-5.18 ) than pumas from the northwestern and mountain states (Colorado, Idaho, Oregon, Utah and Wyoming). Male pumas from the US were more likely to be seropositive than females (PR = 2.08; 95% CI = 1.11-3.92), whereas female pumas from Mexico, Central America and South America were more likely to be seropositive than female pumas from Canada and the US (PR = 2.49; 95% CI = 1.09-5.69). Captive pumas were also more likely to be seropositive (21.7%, 29/92) for T. gondii than free-ranging animals (19.9%, 69/346) (PR = 1.85; 95% CI = 1.06, 3.17). PMID:15019138

  9. Serum chemistry, hematologic, and post-mortem findings in free-ranging bobcats (Lynx rufus) with notoedric mange

    USGS Publications Warehouse

    Serieys, Laurel E.K.; Foley, Janet; Owens, Sean; Woods, Leslie; Boydston, Erin E.; Lyren, Lisa M.; Poppenga, Robert H.; Clifford, Deana L.; Stephenson, Nicole; Rudd, Jaime; Riley, Seth P.D.

    2013-01-01

    Notoedric mange was responsible for a population decline of bobcats (Lynx rufus) in 2 Southern California counties from 2002–2006 and is now reported to affect bobcats in Northern and Southern California. With this study we document clinical laboratory and necropsy findings for bobcats with mange. Bobcats in this study included free-ranging bobcats with mange (n = 34), a control group of free-ranging bobcats without mange (n = 11), and a captive control group of bobcats without mange (n = 19). We used 2 control groups to evaluate potential anomalies due to capture stress or diet. Free-ranging healthy and mange-infected bobcats were trapped or salvaged. Animals were tested by serum biochemistry, complete blood count, urine protein and creatinine, body weight, necropsy, and assessment for anticoagulant rodenticide residues in liver tissue. Bobcats with severe mange were emaciated, dehydrated, and anemic with low serum creatinine, hyperphosphatemia, hypoglycemia, hypernatremia, and hyperchloremia, and sometimes septicemic when compared to control groups. Liver enzymes and leukocyte counts were elevated in free-ranging, recently captured bobcats whether or not they were infested with mange, suggesting capture stress. Bobcats with mange had lower levels of serum cholesterol, albumin, globulin, and total protein due to protein loss likely secondary to severe dermatopathy. Renal insufficiency was unlikely in most cases, as urine protein:creatinine ratios were within normal limits. A primary gastrointestinal loss of protein or blood was possible in a few cases, as evidenced by elevated blood urea nitrogen, anemia, intestinal parasitism, colitis, gastric hemorrhage, and melena. The prevalence of exposure to anticoagulant rodenticides was 100% (n = 15) in bobcats with mange. These findings paint a picture of debilitating, multisystemic disease with infectious and toxic contributing factors that can progress to death in individuals and potential decline in populations.

  10. Seroprevalence of Bartonella infection in American free-ranging and captive pumas (Felis concolor) and bobcats (Lynx rufus).

    PubMed

    Chomel, Bruno B; Kikuchi, Yoko; Martenson, Janice S; Roelke-Parker, Melodie E; Chang, Chao-Chin; Kasten, Rickie W; Foley, Janet E; Laudre, John; Murphy, Kerry; Swift, Pamela K; Kramer, Vicki L; O'brien, Stephen J

    2004-01-01

    Bartonella henselae is the main agent of cat scratch disease in humans and domestic cats are the main reservoir of this bacterium. We conducted a serosurvey to investigate the role of American wild felids as a potential reservoir of Bartonella species. A total of 479 samples (439 serum samples and 40 Nobuto strips) collected between 1984 and 1999 from pumas (Felis concolor) and 91 samples (58 serum samples and 33 Nobuto strips) collected from bobcats (Lynx rufus) in North America, Central America and South America were screened for B. henselae antibodies. The overall prevalence of B. henselae antibodies was respectively 19.4% in pumas and 23.1% in bobcats, with regional variations. In the USA, pumas from the southwestern states were more likely to be seropositive for B. henselae (prevalence ratio (PR) = 2.82, 95% confidence interval (CI) = 1.55, 5.11) than pumas from the Northwest and Mountain states. Similarly, adults were more likely to be B. henselae seropositive than juveniles and kittens (PR = 1.77, 95% CI = 1.07, 2.93). Adult pumas were more likely to have higher B. henselae antibody titers than juveniles and kittens (p = 0.026). B. henselae antibody prevalence was 22.4% (19/85) in bobcats from the USA and 33.3% (2/6) in the Mexican bobcats. In the USA, antibody prevalence varied depending on the geographical origin of the bobcats. In California, the highest prevalence was in bobcats from the coastal range (37.5%). These results suggest a potential role of wild felids in the epidemiological cycle of Bartonella henselae or closely related Bartonella species. PMID:15099499

  11. A sample of mJy radio sources at 1.4 GHz in the Lynx and Hercules fields - I. Radio imaging, multicolour photometry and spectroscopy

    E-print Network

    Rigby, E E; Best, P N

    2007-01-01

    With the goal of identifying high redshift radio galaxies with FRI classification, here are presented high resolution, wide-field radio observations, near infra-red and optical imaging and multi-object spectroscopy of two fields of the Leiden-Berkeley Deep Survey. These fields, Hercules.1 and Lynx.2, contain a complete sample of 81 radio sources with S(1.4 GHz) > 0.5 mJy within 0.6 square degrees. This sample will form the basis for a study of the population and cosmic evolution of high redshift, low power, FRI radio sources which will be presented in Paper II. Currently, the host galaxy identification fraction is 86% with 11 sources remaining unidentified at a level of r > 25.2 mag (Hercules; 4 sources) or r > 24.4 mag (Lynx; 7 sources) or K > 20 mag. Spectroscopic redshifts have been determined for 49% of the sample and photometric redshift estimates are presented for the remainder of the sample.

  12. A sample of mJy radio sources at 1.4 GHz in the Lynx and Hercules fields - I. Radio imaging, multicolour photometry and spectroscopy

    E-print Network

    E. E. Rigby; I. A. Snellen; P. N. Best

    2007-06-15

    With the goal of identifying high redshift radio galaxies with FRI classification, here are presented high resolution, wide-field radio observations, near infra-red and optical imaging and multi-object spectroscopy of two fields of the Leiden-Berkeley Deep Survey. These fields, Hercules.1 and Lynx.2, contain a complete sample of 81 radio sources with S(1.4 GHz) > 0.5 mJy within 0.6 square degrees. This sample will form the basis for a study of the population and cosmic evolution of high redshift, low power, FRI radio sources which will be presented in Paper II. Currently, the host galaxy identification fraction is 86% with 11 sources remaining unidentified at a level of r > 25.2 mag (Hercules; 4 sources) or r > 24.4 mag (Lynx; 7 sources) or K > 20 mag. Spectroscopic redshifts have been determined for 49% of the sample and photometric redshift estimates are presented for the remainder of the sample.

  13. Experimental transmission of Cystoisospora felis-like coccidium from bobcat (Lynx rufus) to the domestic cat (Felis catus).

    PubMed

    Dubey, J P; Houk, A E; Verma, S K; Calero-Bernal, R; Humphreys, J G; Lindsay, D S

    2015-06-30

    Cystoisospora felis is an ubiquitous coccidian of cats. The domestic cat (Felis catus) is its definitive host and several mammalian and avian species are its optional intermediate/transport hosts. Nothing is known if it is transmissible to wild felids. In the present study C. felis-like oocysts were found in two naturally infected bobcats (Lynx rufus) from Pennsylvania. To study transmission of C. felis-like parasite from bobcats to domestic cats, sporulated oocysts of C. felis-like from one bobcat were orally inoculated into interferon gamma gene knockout (KO) mice, and 56 days later tissues of KO mice were fed to two coccidian-free cats; two littermate cats were uninoculated controls. The inoculated cats and controls were euthanized five and seven days later, and their small intestines were studied histologically. One inoculated cat excreted C. felis-like oocysts seven days post inoculation (p.i.) and was immediately euthanized. Mature schizonts, mature male and female gamonts, and unsporulated oocysts were found in the lamina propria of small intestine; these stages were morphologically similar to C. felis of domestic cats. No parasites were seen in histological sections of small intestines of the remaining three cats. The experiment was terminated at seven days p.i. (minimum prepatent period for C. felis) to minimize spread of this highly infectious parasite to other cats. Although oocysts of the parasite in bobcats were morphologically similar to C. felis of domestic cats, the endogenous stages differed in their location of development. The bobcat derived parasite was located in the lamina propria of ileum whereas all endogenous stages of C. felis of domestic cats are always located in enterocytes of intestinal epithelium. Characterization of DNA isolated from C. felis-like oocysts from the donor bobcat revealed that sequences of the ITS1 region was only 87% similar to the ITS1 region of C. felis from domestic cats. These results indicate that the parasite in bobcat is likely different than C. felis of cats. PMID:25964236

  14. Study of galaxies in the Lynx-Cancer void - III. New extreme low surface brightness dwarf galaxies

    NASA Astrophysics Data System (ADS)

    Pustilnik, S. A.; Martin, J.-M.; Tepliakova, A. L.; Kniazev, A. Y.

    2011-10-01

    We present the results of a complex study of the low surface brightness dwarf (LSBD) gas-rich galaxies J0723+3621, J0737+4724 and J0852+1350, which reside in the nearby Lynx-Cancer void. Their ratios M(H I)/LB, according to H I data obtained with the Nançay Radio Telescope (NRT), are respectively ˜3.9, ˜2 and ˜2.6. For the two latter galaxies, we derived an oxygen abundance corresponding to the value of 12+log (O/H) ? 7.3, using spectra from the Russian 6-m telescope (BTA) and the Sloan Digital Sky Survey (SDSS) data base. We found two additional blue LSBDs, J0723+3622 and J0852+1351, which appear to be physical companions of J0723+3621 and J0852+1350 situated at projected distances of ˜12-13 kpc. The companion relative velocities, derived from the BTA spectra, are ?V=+89 km s-1 and +30 km s-1 respectively. The geometry and relative orientation of orbits and spins in these pairs indicate, respectively, prograde and polar encounters for J0723+3621 and J0852+1350. The NRT H I profiles of J0723+3621 and J0723+3622 indicate a sizeable gas flow in this system. The SDSS u, g, r, i images of the five dwarfs are used to derive photometric parameters and exponential or Sersic disc model fits. For three of them, the (u-g), (g-r), (r-i) colours of the outer parts, when compared with PEGASE evolutionary tracks, provide evidence for the dominance of old stellar populations with ages of T˜ (8-10) ± 3 Gyr. For J0723+3622 and J0737+4724 the outer region colours appear rather blue, implying ages of the oldest visible stars of ? Gyr. The new LSB galaxies complement the list of known most metal-poor and 'unevolved' dwarfs in this void, including DDO 68, SDSS J0812+4836, SDSS J0926+3343 and SAO 0822+3545. This unique concentration of 'unevolved' dwarf galaxies in a small cell of the nearby Universe implies a physical relationship between slow galaxy evolution and a void-type global environment. We also compare the baryonic content of these LSBDs with predictions from the most updated cosmological simulations.

  15. Characterization of the Commercially-Available Fluorescent Chloroquine-BODIPY Conjugate, LynxTag-CQGREEN, as a Marker for Chloroquine Resistance and Uptake in a 96-Well Plate Assay

    PubMed Central

    Chan, Kitti W. K.; Choy, Kit-Ying; Rénia, Laurent; Russell, Bruce; Lear, Martin J.; Nosten, François H.; Tan, Kevin S. W.; Chow, Larry M. C.

    2014-01-01

    Chloroquine was a cheap, extremely effective drug against Plasmodium falciparum until resistance arose. One approach to reversing resistance is the inhibition of chloroquine efflux from its site of action, the parasite digestive vacuole. Chloroquine accumulation studies have traditionally relied on radiolabelled chloroquine, which poses several challenges. There is a need for development of a safe and biologically relevant substitute. We report here a commercially-available green fluorescent chloroquine-BODIPY conjugate, LynxTag-CQGREEN, as a proxy for chloroquine accumulation. This compound localized to the digestive vacuole of the parasite as observed under confocal microscopy, and inhibited growth of chloroquine-sensitive strain 3D7 more extensively than in the resistant strains 7G8 and K1. Microplate reader measurements indicated suppression of LynxTag-CQGREEN efflux after pretreatment of parasites with known reversal agents. Microsomes carrying either sensitive- or resistant-type PfCRT were assayed for uptake; resistant-type PfCRT exhibited increased accumulation of LynxTag-CQGREEN, which was suppressed by pretreatment with known chemosensitizers. Eight laboratory strains and twelve clinical isolates were sequenced for PfCRT and Pgh1 haplotypes previously reported to contribute to drug resistance, and pfmdr1 copy number and chloroquine IC50s were determined. These data were compared with LynxTag-CQGREEN uptake/fluorescence by multiple linear regression to identify genetic correlates of uptake. Uptake of the compound correlated with the logIC50 of chloroquine and, more weakly, a mutation in Pgh1, F1226Y. PMID:25343249

  16. Use of stratigraphic models as soft information to constrain stochastic modeling of rock properties: Development of the GSLIB-Lynx integration module

    SciTech Connect

    Cromer, M.V. [Spectra Research Inst., Albuquerque, NM (United States); Rautman, C.A. [Sandia National Labs., Albuquerque, NM (United States). Geohydrology Dept.

    1995-10-01

    Rock properties in volcanic units at Yucca Mountain are controlled largely by relatively deterministic geologic processes related to the emplacement, cooling, and alteration history of the tuffaceous lithologic sequence. Differences in the lithologic character of the rocks have been used to subdivide the rock sequence into stratigraphic units, and the deterministic nature of the processes responsible for the character of the different units can be used to infer the rock material properties likely to exist in unsampled regions. This report proposes a quantitative, theoretically justified method of integrating interpretive geometric models, showing the three-dimensional distribution of different stratigraphic units, with numerical stochastic simulation techniques drawn from geostatistics. This integration of soft, constraining geologic information with hard, quantitative measurements of various material properties can produce geologically reasonable, spatially correlated models of rock properties that are free from stochastic artifacts for use in subsequent physical-process modeling, such as the numerical representation of ground-water flow and radionuclide transport. Prototype modeling conducted using the GSLIB-Lynx Integration Module computer program, known as GLINTMOD, has successfully demonstrated the proposed integration technique. The method involves the selection of stratigraphic-unit-specific material-property expected values that are then used to constrain the probability function from which a material property of interest at an unsampled location is simulated.

  17. Ultra-performance liquid chromatography tandem mass spectrometry combined with automated MetaboLynx analysis approach to screen the bioactive components and their metabolites in Wen-Xin-Formula.

    PubMed

    Cao, Hongxin; Zhang, Aihua; Zhang, Fang-mei; Wang, Qin-qin; Zhang, He; Song, Yan-hua; Zhou, Ying; Sun, Hui; Yan, Guang-li; Han, Ying; Wang, Xijun

    2014-12-01

    Wen-Xin-Formula (WXF), a famous traditional prescription, has been widely used to treat myocardial ischemia syndrome for thousands of years. However, the constituents absorbed into blood after oral administration of WXF remain unknown. Here, an integrative ultra performance liquid chromatography coupled with electrospray ionization/quadrupole-time-of-flight mass spectrometry (UPLC-ESI-Q-TOF-MS) combined with the MetaboLynx approach was established to investigate the absorbed constituents in rats after oral administration of WXF. A hyphenated electrospray ionization and quadrupole-time-of-flight analyzer was used for the determination of accurate mass of the molecule and fragment ions. With this rapid and automated analysis method, a total of 32 peaks were tentatively characterized in vivo based on MS and MS/MS data and comparison with available databasess, 26 of which were parent components and six metabolites. These components mainly were ginsenosides, paeoniflorin, galloyl glucose, berberis alkaloids, phenolic, phenolic glycosides and unsaturated fatty acids, glucuronide products of original berberis alkaloids. The present study demonstrates that integrative UPLC-ESI-Q-TOF-MS technique and MetaboLynx data processing method were successfully applied for the rapid discovery of potentially bioactive components and metabolites from WXF, and proved that the established method could help to explore the effective substances for further research into WXF. PMID:24853889

  18. Early-type Galaxies at z = 1.3. I. The Lynx Supercluster: Cluster and Groups at z = 1.3. Morphology and Color-Magnitude Relation

    NASA Astrophysics Data System (ADS)

    Mei, Simona; Stanford, S. Adam; Holden, Brad P.; Raichoor, Anand; Postman, Marc; Nakata, Fumiaki; Finoguenov, Alexis; Ford, Holland C.; Illingworth, Garth D.; Kodama, Tadayuki; Rosati, Piero; Tanaka, Masayuki; Huertas-Company, Marc; Rettura, Alessandro; Shankar, Francesco; Carrasco, Eleazar R.; Demarco, Ricardo; Eisenhardt, Peter; Jee, Myungkook J.; Koyama, Yusei; White, Richard L.

    2012-08-01

    We confirm the detection of three groups in the Lynx supercluster, at z ? 1.3, through spectroscopic follow-up and X-ray imaging, and we give estimates for their redshifts and masses. We study the properties of the group galaxies compared to the two central clusters, RX J0849+4452 and RX J0848+4453. Using spectroscopic follow-up and multi-wavelength photometric redshifts, we select 89 galaxies in the clusters, of which 41 are spectroscopically confirmed, and 74 galaxies in the groups, of which 25 are spectroscopically confirmed. We morphologically classify galaxies by visual inspection, noting that our early-type galaxy (ETG) sample would have been contaminated at the 30%-40% level by simple automated classification methods (e.g., based on Sérsic index). In luminosity-selected samples, both clusters and groups show high fractions of bulge-dominated galaxies with a diffuse component that we visually identified as a disk and which we classified as bulge-dominated spirals, e.g., Sas. The ETG fractions never rise above ?50% in the clusters, which is low compared to the fractions observed in other massive clusters at z ? 1. In the groups, ETG fractions never exceed ?25%. However, overall bulge-dominated galaxy fractions (ETG plus Sas) are similar to those observed for ETGs in clusters at z ~ 1. Bulge-dominated galaxies visually classified as spirals might also be ETGs with tidal features or merger remnants. They are mainly red and passive, and span a large range in luminosity. Their star formation seems to have been quenched before experiencing a morphological transformation. Because their fraction is smaller at lower redshifts, they might be the spiral population that evolves into ETGs. For mass-selected samples of galaxies with masses M > 1010.6 M ? within ? > 500 Mpc-2, the ETG and overall bulge-dominated galaxy fractions show no significant evolution with respect to local clusters, suggesting that morphological transformations might occur at lower masses and densities. The ETG mass-size relation shows evolution toward smaller sizes at higher redshift in both clusters and groups, while the late-type mass-size relation matches that observed locally. When compared to the clusters, the group ETG red sequence shows lower zero points (at ~2?) and larger scatters, both expected to be an indication of a younger galaxy population. However, we show that any allowed difference between the age in groups and clusters would be small when compared to the differences in age in galaxies of different masses.

  19. Toxoplasmosis in Canadian lynx (Lynx canadensis) in Québec, Canada

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Toxoplasma gondii, one of the more common zoonotic parasites in the world, can cause serious illness in humans and other animals worldwide. Felids are the only host that can shed T. gondii oocysts, which are essential to the perpetuation of the parasite cycle. In much of Boreal Canada, the Canadian ...

  20. Experimental release of an Iberian lynx (Lynx pardinus)

    Microsoft Academic Search

    Alejandro Rodriguez; Luis Barrios; Miguel Delibes

    1995-01-01

    Reintroduction to the wild of threatened species has become a modern additional justification for captive propagation. This conservation procedure is costly, and both economic resources and the absence of optimal conditions in the field limit the IUCN recommendations for reintroduction to a small proportion of potential candidate species. Furthermore reintroduction attempts often fail. In carnivores, reintroduction failure is attributed to

  1. A coupling pair of dwarfs in Lynx

    E-print Network

    Makarov, D; Chengalur, J N; Uklein, R; Marchuk, A

    2013-01-01

    We report on discovery of unique binary system of dIr galaxies which looks like a low surface brightness tidal stream in the halo of another dwarf galaxy. Both the galaxies are detected in the HI line with the Giant Metrewave Radio Telescope (GMRT). The pair components have absolute blue magnitudes -16.0 and -13.2, heliocentric radial velocities 1799 and 1842 km/s, and hydrogen masses-to-luminosity ratios 0.4 and 1.6 in solar units, respectively. The binary system is characterized by a high orbital mass-to-luminosity ratio of 49 in solar units and a short crossing time of 0.22 Gyr.

  2. Dynamics and Viability of a Metapopulation of the Endangered Iberian Lynx (Lynx pardinus)

    Microsoft Academic Search

    Pilar Gaona; Pablo Ferreras; Miguel Delibes

    1998-01-01

    The use of metapopulation models in conservation biology is growing ex- ponentially, but there is a need for empirical studies that support theoretical approaches, especially for species with large and long-lived individuals. In this paper we explore the viability and dynamics of a real metapopulation of an endangered mammal by combining field work and modeling in order to support conservation

  3. Comparative patterns of adrenal activity in captive and wild Canada lynx ( Lynx canadensis )

    Microsoft Academic Search

    Kerry V. FansonNadja; Nadja C. Wielebnowski; Tanya M. Shenk; Jeffrey R. Lucas

    Stress and animal well-being are often assessed using concentrations of glucocorticoids (GCs), a product of the hypothalamic–pituitary–adrenal\\u000a axis. However, GC concentrations can also be modulated by predictable events, such as changes in season or life history stage.\\u000a Understanding normative patterns of adrenal activity is critical for making valid conclusions about changes in GC concentrations.\\u000a In this study, we validated an

  4. What factors determine cyclic amplitude in the snowshoe hare (Lepus americanus) cycle?

    E-print Network

    Hartman, Chris

    americanus, 10 year cycle, boreal forest, predation, Canada lynx, Lynx canadensis, succession, secondary boréale, prédation, lynx du Canada, Lynx canadensis, succession, substances chimiques secondaires, météo

  5. Galemys 19 (n especial): 3-15, 2007 ISSN: 1137-8700

    E-print Network

    Museo Nacional de Ciencias Naturales

    IBÉRICO (Lynx pardinus), LINCE BOREAL (L. lynx) Y LINCE ROJO (L. rufus) PARA EL ESTABLECIMIENTO DE UN and cells from Iberian lynx (Lynx pardinus), Eurasian lynx (L. lynx) and bobcats (L. rufus) to establish natural conditions. This is the case of the Iberian lynx, the most endangered felid in the world. Despite

  6. Mammalogy Laboratory 9 Carnivora & Pholidota General Notes: It may seem like we have several species represented, but there are several

    E-print Network

    Sullivan, Jack

    (domestic cat)* Puma concolor (cougar) Lynx rufus (bobcat) L. canadensis (Canada lynx) Leopardus pardalis: Felis, Lynx, Acinonyx, Neofelis, Panthera, Puma, Leopardus, Uncia Material in Lab: Felis sylvestris

  7. Economic Impacts of Designating Critical Habitat Under the U.S. Endangered Species Act: Case Study of the Canada Lynx (Lynx Canadensis)

    Microsoft Academic Search

    Timm Kroeger; Frank Casey

    2006-01-01

    Conservation of species and their habitats yields economic benefits to society. The principal U.S. species conservation law, the Endangered Species Act (ESA), requires the designation of critical habitat for ESA-listed species. The ESA provides room for economic analysis to enter conservation decisions by stipulating that the decision to designate a particular area take into account the resulting economic impact. Unfortunately,

  8. Inferring species distributions in the absence of occurrence records: An example considering wolverine ( Gulo gulo) and Canada lynx ( Lynx canadensis) in New Mexico

    Microsoft Academic Search

    Jennifer K. Frey

    2006-01-01

    Information about geographic distributions is required for species conservation and management. Ultimately, this information is derived from records of occurrence. However, the reliability and availability of occurrence records are variable. A conceptual framework for evaluating the reliability of occurrence records is provided. Only records associated with physical evidence, especially a museum voucher specimen, are considered verified. However, errors in species

  9. The effect of illumination and time of day on movements of bobcats (Lynx rufus).

    PubMed

    Rockhill, Aimee P; DePerno, Christopher S; Powell, Roger A

    2013-01-01

    Understanding behavioral changes of prey and predators based on lunar illumination provides insight into important life history, behavioral ecology, and survival information. The objectives of this research were to determine if bobcat movement rates differed by period of day (dark, moon, crepuscular, day), lunar illumination (<10%, 10 - <50%, 50 - <90%, >90%), and moon phase (new, full). Bobcats had high movement rates during crepuscular and day periods and low movement rates during dark periods with highest nighttime rates at 10-<50% lunar illumination. Bobcats had highest movement rates during daytime when nighttime illumination was low (new moon) and higher movement rates during nighttime when lunar illumination was high (full moon). The behaviors we observed are consistent with prey availability being affected by light level and by limited vision by bobcats during darkness. PMID:23861963

  10. Seroprevalence of antibodies to Toxoplasma gondii in the Pennsylvania bobcat (Lynx rufus rufus).

    PubMed

    Mucker, Eric M; Dubey, J P; Lovallo, Matthew J; Humphreys, Jan G

    2006-01-01

    From 2000 to 2002 bobcat blood samples were collected, in association with the Pennsylvania Game Commission, during the recently reactivated bobcat hunting and trapping season. Sex, age, and county/township data were recorded for each animal. Blood was tested for antibodies to Toxoplasma gondii using the modified agglutination test. In the 2-yr study, 131 bobcat samples were collected in 14 Pennsylvania counties and 109 (83%) of these had antibodies to T. gondii (titer>or=25). A two-way Chi-Square test (95% confidence interval) yielded no significance differences in antibody prevalence between males (83%) and females (88%) or adults (83%) and juveniles (77%). All 14 counties had at least one bobcat with antibodies to T. gondii. PMID:16699165

  11. Male reproductive traits, semen cryopreservation, and heterologous in vitro fertilization in the bobcat ( Lynx rufus)

    Microsoft Academic Search

    N. Gañán; R. González; A. Sestelo; J. J. Garde; I. Sánchez; J. M. Aguilar; M. Gomendio; E. R. S. Roldan

    2009-01-01

    There is limited information on bobcat ejaculate traits and sperm cryopreservation and fertilizing ability. Bobcats were electroejaculated under general anesthesia in November (autumn) and April (spring), and endocrine and sperm traits were characterized. Testosterone (mean±SEM: 0.90±0.15 ng\\/mL) was not different between sampling times, but cortisol (average: 13.95±1.73?g\\/dL) was significantly higher in April. Average number of spermatozoa was 10.0±3.4×106 sperm\\/ejaculate, with

  12. SEROPREVALENCE OF ANTIBODIES TO TOXOPLASMA GONDII IN THE PENNSYLVANIA BOBCAT (LYNX RUFUS RUFUS)

    Technology Transfer Automated Retrieval System (TEKTRAN)

    From 2000-2002 bobcat serum samples were collected, in association with the Pennsylvania Game Commission, during the recently reactivated bobcat hunting and trapping season. Sex, age and county/township data were recorded for each sample. Sera were tested for antibodies to Toxoplasma gondii using t...

  13. Male reproductive traits, semen cryopreservation, and heterologous in vitro fertilization in the bobcat (Lynx rufus).

    PubMed

    Gañán, N; González, R; Sestelo, A; Garde, J J; Sánchez, I; Aguilar, J M; Gomendio, M; Roldan, E R S

    2009-08-01

    There is limited information on bobcat ejaculate traits and sperm cryopreservation and fertilizing ability. Bobcats were electroejaculated under general anesthesia in November (autumn) and April (spring), and endocrine and sperm traits were characterized. Testosterone (mean+/-SEM: 0.90+/-0.15 ng/mL) was not different between sampling times, but cortisol (average: 13.95+/-1.73 microg/dL) was significantly higher in April. Average number of spermatozoa was 10.0+/-3.4 x 10(6) sperm/ejaculate, with values being significantly higher in April. Sperm motility (average 55.7+/-5.8% motile sperm) was not different between sampling times. The proportion of normal spermatozoa in the ejaculate (average: 14.7+/-2.1%) was significantly higher in April, but the percentage of spermatozoa with intact acrosomes (average: 43.7+/-3.8%) was significantly higher in autumn. Spermatozoa were cryopreserved in a Tes-Tris-based diluent (TEST) or Biladyl, both containing 20% egg yolk and 4% glycerol. Diluted sperm were loaded into straws, refrigerated using a programmable thermoblock with a dry chamber, frozen in nitrogen vapors, thawed, and incubated in F-10 medium with 5% fetal bovine serum for up to 3h. After cryopreservation in TEST, there were about 50% motile sperm upon thawing, and survival was high during incubation post-thaw. Cryopreservation in Biladyl led to similar results, but motility decreased substantially during incubation post-thaw. Bobcat spermatozoa fertilized domestic cat oocytes matured in vitro. Fertilization rates were higher for sperm collected in April and cryopreserved in TEST (46%) than for those cryopreserved using Biladyl (<3%). Fertilized oocytes cleaved in culture, and some (27%) reached the morula stage. This study has allowed us to gain further baseline information on bobcat reproduction, explore sperm cryopreservation conditions, and show that fertilizing capacity can be tested using in vitro-matured cat oocytes. These results will be important for future conservation efforts. PMID:19410285

  14. Molecular mapping of Fusarium head blight resistance in the winter wheat population Dream\\/Lynx

    Microsoft Academic Search

    M. Schmolke; G. Zimmermann; H. Buerstmayr; G. Schweizer; T. Miedaner; V. Korzun; E. Ebmeyer; L. Hartl

    2005-01-01

    Fusarium head blight (FHB), mainly caused by Fusarium graminearum and F. culmorum, can significantly reduce the grain quality of wheat (Triticum aestivum L.) due to mycotoxin contamination. The objective of this study was to identify quantitative trait loci (QTLs) for FHB resistance in a winter wheat population developed by crossing the resistant German cultivar Dream with the susceptible British cultivar

  15. IDENTIFYING BREEDING HABITAT FOR THE IBERIAN LYNX: INFERENCES FROM A FINE-SCALE SPATIAL ANALYSIS

    Microsoft Academic Search

    Néstor Fernández; Miguel Delibes; Francisco Palomares; David J. Mladenoff

    2003-01-01

    Empirical landscape habitat models are valuable tools for addressing species conservation issues in heterogeneous landscapes. These have been particularly useful for animal populations requiring extensive areas, like large mammalian carnivores. Although models are scale-dependent, they are often based exclusively on coarse-grained information on landscape structure and species distribution. However, accurate discrimination and qual- ity assessment of breeding habitats may require

  16. Pleistocene and ecological effects on continental-scale genetic differentiation in the bobcat (Lynx rufus).

    PubMed

    Reding, Dawn M; Bronikowski, Anne M; Johnson, Warren E; Clark, William R

    2012-06-01

    The potential for widespread, mobile species to exhibit genetic structure without clear geographic barriers is a topic of growing interest. Yet the patterns and mechanisms of structure--particularly over broad spatial scales--remain largely unexplored for these species. Bobcats occur across North America and possess many characteristics expected to promote gene flow. To test whether historical, topographic or ecological factors have influenced genetic differentiation in this species, we analysed 1 kb mtDNA sequence and 15 microsatellite loci from over 1700 samples collected across its range. The primary signature in both marker types involved a longitudinal cline with a sharp transition, or suture zone, occurring along the Great Plains. Thus, the data distinguished bobcats in the eastern USA from those in the western half, with no obvious physical barrier to gene flow. Demographic analyses supported a scenario of expansion from separate Pleistocene refugia, with the Great Plains representing a zone of secondary contact. Substructure within the two main lineages likely reflected founder effects, ecological factors, anthropogenic/topographic effects or a combination of these forces. Two prominent topographic features, the Mississippi River and Rocky Mountains, were not supported as significant genetic barriers. Ecological regions and environmental correlates explained a small but significant proportion of genetic variation. Overall, results implicate historical processes as the primary cause of broad-scale genetic differentiation, but contemporary forces seem to also play a role in promoting and maintaining structure. Despite the bobcat's mobility and broad niche, large-scale landscape changes have contributed to significant and complex patterns of genetic structure. PMID:22548482

  17. The Effect of Illumination and Time of Day on Movements of Bobcats (Lynx rufus)

    PubMed Central

    Rockhill, Aimee P.; DePerno, Christopher S.; Powell, Roger A.

    2013-01-01

    Understanding behavioral changes of prey and predators based on lunar illumination provides insight into important life history, behavioral ecology, and survival information. The objectives of this research were to determine if bobcat movement rates differed by period of day (dark, moon, crepuscular, day), lunar illumination (<10%, 10 - <50%, 50 - <90%, >90%), and moon phase (new, full). Bobcats had high movement rates during crepuscular and day periods and low movement rates during dark periods with highest nighttime rates at 10-<50% lunar illumination. Bobcats had highest movement rates during daytime when nighttime illumination was low (new moon) and higher movement rates during nighttime when lunar illumination was high (full moon). The behaviors we observed are consistent with prey availability being affected by light level and by limited vision by bobcats during darkness. PMID:23861963

  18. Status of porting EPICS to the LynxOS\\/Pentium platform

    Microsoft Academic Search

    T. V. Salikova; A. D. Oreshkov; Ying Wu; John M. J. Madey

    The Experimental Physics and Industrial Control System (EPICS) requires expensive hardware and software to p rovide the high p erformance a nd h igh reliability required for accelerator control. No more than several years ago, personal computers based on Intel x86 microprocessors lacked computing power to compete with workstations, such as SPARCstation. However, with the a dvent of the high

  19. Original Article Using Population Genetics for Management of

    E-print Network

    Clark, William R.

    are recognized as distinct subspecies, with Lynx rufus fasciatus west and Lynx rufus pallescens east, Lynx rufus, Oregon, population genetics, subspecies, trapping. The bobcat (Lynx rufus) is the most international regulation of listed Lynx species. This CITES classification requires state wildlife agencies

  20. CSIRO PUBLISHING Reproduction, Fertility and Development, 2009, 21, 848859 www.publish.csiro.au/journals/rfd

    E-print Network

    Museo Nacional de Ciencias Naturales

    lynx (Lynx pardinus) Natalia GañánA, Raquel GonzálezA, J. Julián GardeB, Fernando MartínezC, Astrid affecting sperm cryopreservation were assessed in the Iberian lynx (Lynx pardinus), a species regarded acrosomes between the two diluents. Iberian lynx spermatozoa fertilised domestic cat oocytes in vitro

  1. REPRODUCTIONRESEARCH Reproductive traits in captive and free-ranging males of the

    E-print Network

    Museo Nacional de Ciencias Naturales

    endangered Iberian lynx (Lynx pardinus) Natalia Gan~a´n1 , Adria´n Sestelo2 , J Julia´n Garde3 , Fernando@mncn.csic.es Abstract The Iberian lynx (Lynx pardinus) is the most endangered felid in the world. Adequate genetic­285 Introduction The Iberian lynx is regarded as the world's most endangered felid and the most threatened

  2. NOTES FROM THE FIELD p EDICTING THE EFFECTS OF FOREST

    E-print Network

    ON LYNX POPULATIONS Figure l. Location of lynx .study areas in western Montana, 1999-2006 Cre::dit: Western Montana Lynx Study- USFS ROL'ky Mm. Research Station Studying lynx ecology is difficult and expen studied lynx den-site selection as a hierarchical process based on 59 dens from 19 females that we located

  3. Internet and World Wide Web (WWW) EXEN 550, Management Information

    E-print Network

    Kimbrough, Steven Orla

    's mode of addressing 2. Lynx---exploring the Web with a simple text­based browser \\Lambda File: internet; 2 Lynx Lynx is a text­oriented Web browser (client) from the University of Kansas. Log into your Unix account and launch Lynx by typing lynx at the prompt. When you see a page, you may use the arrow

  4. Ecology, 88(11), 2007, pp. 27362743 2007 by the Ecological Society of America

    E-print Network

    . Canada lynx (Lynx canadensis) and snowshoe hare (Lepus americanus) populations undergo cyclic in the predator community. Key words: alternative prey; Canada lynx; Lepus americanus; Lynx canadensis; population GRADIENTS IN DIET AFFECT POPULATION DYNAMICS OF CANADA LYNX JAMES D. ROTH,1,6 JOHN D. MARSHALL,2 DENNIS L

  5. .. ConservationGenetics1: 285-288,2000. ~, @2001KluwerAcademicPublishers.Printedin theNetherlands. 285

    E-print Network

    Mills, L. Scott

    October 2000; accepted 1 November 2000 Key words: felids, hair snags,lynx, Lynx canadensis the distribution primers L16007 and Hl6498 (Kocher et al. 1989; of Canada lynx (Lynx canadensis) across the UNetherlands. 285 Technical note Identifying lynx and other North American felids based on MtDNA analysis L. Scott

  6. Reconsidering the Specialist-Generalist Paradigm in Niche Breadth Dynamics: Resource Gradient Selection by

    E-print Network

    by developing range-wide species distribution models for Canada lynx, Lynx canadensis, and bobcat, Lynx rufus Selection by Canada Lynx and Bobcat Michael J. L. Peers1 *, Daniel H. Thornton1,2 , Dennis L. Murray1 1. Using a suite of environmental factors to define each species' niche, we determined that Canada lynx

  7. Research Note Precommercial Thinning Reduces Snowshoe Hare

    E-print Network

    Mills, L. Scott

    including the United States federally threatened Canada lynx (Lynx canadensis), can be abundant in young, experiment, forest management, Lynx canadensis, lynx foraging habitat, Montana, precommercial thinning.?2 forests of western Montana, USA, where there is a persistent population of Canada lynx. Post

  8. Introduction Many studies of herbivore and predator dynamics have estimated

    E-print Network

    Krebs, Charles J.

    and Sibly 2002).A different form of numerical response of lynx (Lynx canadensis) to snowshoe hares (Lepus described a relationship between lynx density and hare density, not between lynx r and hare density. It is the latter approach that is investigated here. Predators such as lynx and prey such as snowshoe hares

  9. 80 THE CANADIAN FIELD-NATURALIST Vol. 128 Introduction

    E-print Network

    Ickert-Bond, Steffi

    - mals, such as Coyotes (Canis latrans) and Canada Lynx (Lynx canadensis). The only published report, Minn). Collars Multiple Crossings of a Large Glacial River by Canada Lynx (Lynx canadensis) DASHIELL of a Canada Lynx cross- ing an open river describes an individual that swam across a 3.2 km wide section

  10. Conservation Genetics 1: 285288, 2000. 2001 Kluwer Academic Publishers. Printed in the Netherlands.

    E-print Network

    30 October 2000; accepted 1 November 2000 Key words: felids, hair snags, lynx, Lynx canadensis the distribution of Canada lynx (Lynx canadensis) across the U.S. using hair snags, we have developed a protocol in the Netherlands. 285 Technical note Identifying lynx and other North American felids based on MtDNA analysis L

  11. , 20132495, published 30 October 20132802013Proc. R. Soc. B Michael J. L. Peers, Daniel H. Thornton and Dennis L. Murray

    E-print Network

    , we evaluated whether Canada lynx (Lynx canadensis) or bobcat (Lynx rufus) were displaced in regions and Dennis L. Murray displacement in Canada lynx and bobcat Evidence for large-scale effects of competition. 2013 Evidence for large-scale effects of competition: niche displacement in Canada lynx and bobcat

  12. PELLET COUNT INDICES COMPARED TO MARKRECAPTURE ESTIMATES FOR EVALUATING SNOWSHOE HARE DENSITY

    E-print Network

    and are the primary prey base of Canada lynx (Lynx canadensis), a carnivore recently listed as threatened prey of several forest carni- vores, especially Canada lynx. Lynx are considered sensitive species as a threatened species in the contiguous United States (U.S. Fish and Wildlife Service 2000); management of lynx

  13. Author's personal copy Combining resource selection and movement behavior to predict corridors for

    E-print Network

    States, Canada lynx Lynx canadensis is a federally threatened bor- eal species that may require of anthropogenic disturbance (Channell and Lomolino, 2000; Schaefer, 2003). Canada lynx (Lynx canadensis), listed for Canada lynx at their southern range periphery John R. Squires a, , Nicholas J. DeCesare b , Lucretia E

  14. Management and Conservation Article Space Use and Habitat Selection by Bobcats in the

    E-print Network

    Clark, William R.

    , IA 50049, USA ABSTRACT Historically, bobcats (Lynx rufus) were found throughout the Corn Belt region range, Iowa, landscape, Lynx rufus. Historically, bobcats (Lynx rufus) were widespread in the prairie

  15. 50 CFR 23.69 - How can I trade internationally in fur skins and fur skin products of bobcat, river otter, Canada...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...means bobcat (Lynx rufus ), river otter (Lontra canadensis ), Canada lynx (Lynx canadensis ), gray wolf (Canis lupus ), and brown bear (Ursus arctos ) harvested in the United States . These species are included in Appendix II...

  16. Autoregressive dynamics deduced from noisy, categorical ecological data

    E-print Network

    Bølviken, Erik

    the oscillations of hare and lynx (the main predator). Independent data for the lynx is available and could and other voles as well as for hare and lynx. These periodic phenomena remains a central theme in ecology

  17. 75 FR 57059 - Montana Department of Natural Resources and Conservation Final Habitat Conservation Plan and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-17

    ...of grizzly bear (Ursus arctos horribilis), Canada lynx (Lynx canadensis), and bull trout (Salvelinus confluentus), which...public comment period; (2) information from Canada lynx researcher, Dr. John Squires, U.S. Forest...

  18. Predicting potential habitat and population size for reintroduction of the Far Eastern leopards in the Russian Far East

    E-print Network

    Hebblewhite, Mark

    (Lynx canadensis) to Colorado (Devineau et al., 2010) and the Swiss Alps (L. lynx)(Breitenmoser, 1998 successful populations where significant dispersal barriers or human persecution still exist, such as Lynx

  19. Anatomy of a population cycle: the role of density dependence and demographic variability on numerical

    E-print Network

    Row, Jeffrey R.

    and species-specific (Canada lynx: Lynx canadensis; small rodents: Microtus, Lemmus and Clethrionomys spp models, reductions in reproductive potential in both the lynx and small rodent systems led to notably

  20. 76 FR 69758 - Draft Environmental Assessment, Incidental Take Plan, and Application for an Incidental Take...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-09

    ...ADDRESSES: Send comments by U.S. mail to Attn: Lynx HCP, Laury Zicari, Field Supervisor, U.S. Fish...take permit to take the federally threatened Canada lynx (Lynx canadensis) in conjunction with Maine's furbearer trapping...

  1. Patterns and processes of spatial genetic structure in a mobile and continuously distributed species, the bobcat (Lynx rufus)

    Microsoft Academic Search

    Dawn Marie Reding

    2011-01-01

    Population structure, the term used to describe the reproductive and demographic cohesiveness of con-specific individuals, is a fundamental concept in ecology and evolution. Despite the importance, patterns and processes of population structure are poorly understood, particularly for highly mobile species with broad distributions. For these organisms, the ability to disperse across large distances and occupy diverse habitats should promote gene

  2. Bovine Tuberculosis in Doñana Biosphere Reserve: The Role of Wild Ungulates as Disease Reservoirs in the Last Iberian Lynx Strongholds

    PubMed Central

    Gortázar, Christian; Torres, María José; Vicente, Joaquín; Acevedo, Pelayo; Reglero, Manuel; de la Fuente, José; Negro, Juan José; Aznar-Martín, Javier

    2008-01-01

    Doñana National Park (DNP) in southern Spain is a UNESCO Biosphere Reserve where commercial hunting and wildlife artificial feeding do not take place and traditional cattle husbandry still exists. Herein, we hypothesized that Mycobacterium bovis infection prevalence in wild ungulates will depend on host ecology and that variation in prevalence will reflect variation in the interaction between hosts and environmental risk factors. Cattle bTB reactor rates increased in DNP despite compulsory testing and culling of infected animals. In this study, 124 European wild boar, 95 red deer, and 97 fallow deer were sampled from April 2006 to April 2007 and analyzed for M. bovis infection. Modelling and GIS were used to identify risk factors and intra and inter-species relationships. Infection with M. bovis was confirmed in 65 (52.4%) wild boar, 26 (27.4%) red deer and 18 (18.5%) fallow deer. In the absence of cattle, wild boar M. bovis prevalence reached 92.3% in the northern third of DNP. Wild boar showed more than twice prevalence than that in deer (p<0.001). Modelling revealed that M. bovis prevalence decreased from North to South in wild boar (p<0.001) and red deer (p<0.01), whereas no spatial pattern was evidenced for fallow deer. Infection risk in wild boar was dependent on wild boar M. bovis prevalence in the buffer area containing interacting individuals (p<0.01). The prevalence recorded in this study is among the highest reported in wildlife. Remarkably, this high prevalence occurs in the absence of wildlife artificial feeding, suggesting that a feeding ban alone would have a limited effect on wildlife M. bovis prevalence. In DNP, M. bovis transmission may occur predominantly at the intra-species level due to ecological, behavioural and epidemiological factors. The results of this study allow inferring conclusions on epidemiological bTB risk factors in Mediterranean habitats that are not managed for hunting purposes. Our results support the need to consider wildlife species for the control of bTB in cattle and strongly suggest that bTB may affect animal welfare and conservation. PMID:18648665

  3. La chasse au gupard et au lynx en Syrie et en Irak au Moyen 7 fvrier 2012

    E-print Network

    Boyer, Edmond

    Âge »), le guépard était à l'époque encore présent à l'état sauvage au Proche-Orient. On trouvait des avait été capturé encore sauvage, et dont s'occupait un serviteur préposé, le « guépardier » (fahh

  4. Vegetation structure and prey abundance requirements of the Iberian lynx: implications for the design of reserves and corridors

    Microsoft Academic Search

    F. Palomares

    2001-01-01

    Summary 1. Habitat alteration and fragmentation are two of the greatest threats to biodiversity. The conservation of most species in highly encroached areas requires reserves that are connected by suitable habitat corridors to increase the effectiveness of the area under protection. However, the quality required for such corridors is still debated. This study investigated the habitat characteristics (vegetation structure and

  5. DNA Analysis of Hair and Scat Collected Along Snow Tracks to Document the Presence of Canada Lynx

    Microsoft Academic Search

    KEVIN S. McKELVEY; JEFFREY VON KIENAST; KEITH B. AUBRY; GARY M. KOEHLER; BENJAMIN T. MALETZKE; JOHN R. SQUIRES; EDWARD L. LINDQUIST; STEVE LOCH; MICHAEL K. SCHWARTZ

    2006-01-01

    Snow tracking is often used to inventory carnivore communities, but species identification using this method can produce ambiguous and misleading results. DNA can be extracted from hair and scat samples collected from tracks made in snow. Using DNA analysis could allow positive track identification across a broad range of snow conditions, thus increasing survey accuracy and efficiency. We investigated the

  6. Knowledge and Perceptions of Macedonian Hunters and Herders: The Influence of Species Specific Ecology of Bears, Wolves, and Lynx

    Microsoft Academic Search

    Nicolas Lescureux; John D. C. Linnell

    2010-01-01

    The fact that human—large carnivore relationships tend to be full of material and social conflicts raises applied questions\\u000a concerning the origin of human perceptions linked to these animals and more theoretical questions concerning the link between\\u000a identification and relational processes. This study, based on ethno-ethological surveys in the Republic of Macedonia (SE Europe),\\u000a aims to show that the widely contrasting

  7. P.O. Box 161990 Orlando, Florida 32816-1990 (407) 823-2251 FAX (407) 823-5156 An Equal Opportunity and Affirmative Action Institution

    E-print Network

    Wu, Shin-Tson

    and LYNX, UCF students, faculty, and staff have a number of transit options. Three bus routes serve UCF at the Millican Hall Information kiosk or by calling LYNX at (407) 841-8240. For more information visit http://www.golynx.com/riding-lynx/knight-lynx

  8. TP machines no 1 (groupes MASS 4 et Math Info 2)

    E-print Network

    Lagache, Thibault

    commandes > airmiles > ?airmiles > lynx > ?lynx > LakeHuron > ?LakeHuron > min(LakeHuron) > max(LakeHuron), boxplot(airlines), boxplot(lynx). Il y a plusieurs façons de définir la boîte à moustaches. Quelle est la méthode utilisée par R ? 9. Représentation d'une suite. Examiner la suite statistique (= le vecteur) lynx

  9. Order Patterns in Time Series Christoph Bandt and Faten Shiha

    E-print Network

    Schürmann, Michael

    sunspot series and annual Canadian lynx series [20] the function p(d) looks curious (Figure 1 and the 10-years cycle of lynx. Note that the sunspots have 3046 values and the lynx only 114. Let us(d) becomes 0.01 for the sunspots and 0.05 for the lynx. This agrees with the fluctuations of consecutive

  10. United States of Agriculture

    E-print Network

    Technical Report RMRS-GTR-30WWW October 1999 Ecology and Conservation of Lynx in the United States Leonard F.; Koehler, Gary M.; Krebs, Charles J.; McKelvey, Kevin S.; Squires, John R. Ecology and conservation of lynx regarding the fate of the lynx in the United States. Chapters look at the relationships among lynx, its

  11. Proc. Natl. Acad. Sci. USA Vol. 94, pp. 51475152, May 1997

    E-print Network

    Krebs, Charles J.

    (Lynx canadensis Kerr, 1792) are well known (1­4). These 9- to 11-year fluctuations are commonly in snowshoe hare and Canadian lynx: Asymmetric food web configurations between hare and lynx (statistical Kingdom, March 3, 1997 (received for review May 30, 1996) ABSTRACT The snowshoe hare and the Canadian lynx

  12. Proc. Natl. Acad. Sci. USA Vol. 95, pp. 1543015435, December 1998

    E-print Network

    Krebs, Charles J.

    in fur returns of the Canadian lynx (Lynx canadensis) have influenced ecological theory profoundly (1 to processes: Phase and density dependencies in the Canadian lynx cycle (statistical modeling nonlinearity America, lynx populations undergo 10-year cycles. Analysis of 21 time series from 1821 to the present

  13. Ilntmduction to Detection and Survey Methods William I. Zielinski' and Thomas E. Kucera2

    E-print Network

    Standiford, Richard B.

    (Lynx canadensis), and wolverine (Gulo gulo) (henceforth collectively referred to as MFLW), are no less that we address in this manual, the American marten (Martes americana), fisher (Martes pennanti), lynx.S. Department of Interior. The lynx is a C2 species in nine states and either SE or ST in two states. The fisher

  14. In the early 1800s, Canadian fur traders began to notice dramatic fluctuations in snowshoe hare (Lepus ameri-

    E-print Network

    Kelly, Maggi

    (Lepus ameri- canus) and Canadian lynx populations (Lynx canadensis) (Winterhalder 1980). Almost 100 Company to document an interrelated rise and fall in hare and lynx populations (Elton and Nicholson 1942 in regulating these populations and their interactions (Krebs et al. 2001). The case of the lynx and the hare

  15. exclusion was assessed by t tests, treating each year as a separate comparison. The survival on control trees

    E-print Network

    Krebs, Charles J.

    is suggested. Periodic population fluctuations of the Can- ada lynx (Lynx canadensis) have greatly in- fluenced Dynamic Structure of Canada Lynx Populations Within Three Climatic Regions Nils Chr. Stenseth,1,2 * Kung of Canada, lynx populations undergo regular density cycles. Analysis of 21 time series from 1821 onward

  16. BioOne sees sustainable scholarly publishing as an inherently collaborative enterprise connecting authors, nonprofit publishers, academic institutions, research libraries, and research funders in the common goal of maximizing access to critical research.

    E-print Network

    Dever, Jennifer A.

    , 24 West Chewuch, Winthrop, WA 98862, USA ABSTRACT Lynx (Lynx canadensis) occur in the northern in the common goal of maximizing access to critical research. Habitat Fragmentation and the Persistence of Lynx and permissions requests should be directed to the individual publisher as copyright holder. #12;Lynx Special

  17. Linking climate change to population cycles of hares and C H U A N Y A N * , N I L S C H R . S T E N S E T H , C H A R L E S J . K R E B S and ZHIBIN ZHANG*

    E-print Network

    Krebs, Charles J.

    of snowshoe hares (Lepus americanus, Erxleben 1777) and Canada lynx (Lynx canadensis, Kerr 1792) in the boreal: asymmetric predation, global warming, Lepus americanus, Lynx canadensis, North Atlantic OscillationLinking climate change to population cycles of hares and lynx C H U A N Y A N * , N I L S C H R

  18. Indices of population size are commonly used in ecological studies because obtaining actual abun-

    E-print Network

    Krebs, Charles J.

    , Krebs et al. 2001). With the listing of the Canada lynx (Lynx canadensis) as threatened in the United States and recent lynx reintroductions to Colorado, wildlife managers are under pressure to estimate snowshoe hare densities over large areas because hares are the primary food source for lynx (Kloor 1999

  19. Research Article The Effect of Snowmobile Trails on Coyote Movements

    E-print Network

    canadensis) are sympatric throughout much of the lynx's southern range. Researchers and managers have latrans, competition, coyote, lynx, Lynx canadensis, recreation, snow compaction, snowmobile, snowshoeResearch Article The Effect of Snowmobile Trails on Coyote Movements Within Lynx Home Ranges JAY A

  20. Testing a remote camera protocol to detect animals

    E-print Network

    Minnesota, University of

    test with a scent-based lure: Canada lynx (Lynx canadensis), wolf (Canis lupus), coyote (C. latrans, although pictures that were taken documented the presence of several species. Pictures of lynx were taken when this camera equipment was set up on a food bait with known lynx visitation outside the survey area

  1. Molecular Ecology Notes (2005) 5, 6061 doi: 10.1111/j.1471-8286.2004.00831.x 2005 Blackwell Publishing Ltd

    E-print Network

    2005-01-01

    with the Canada lynx (Lynx canadensis; Johnson & O'Brien 1997), which is our primary species of interest. In all samples, lynx, noninvasive, scat, sex identification Received 05 August 2004; revision accepted 23 and Zfy) for domestic cat (Felis silvestris; GenBank acces- sion AF253014, AF252989), bobcat (Lynx rufus

  2. The Steiner Multigraph Problem: Wildlife Corridor Design for Multiple Species

    E-print Network

    canadensis) (see Figure 1) are classi- fied as species of concern, with the lynx federally listed for wolverines and lynx in western Montana, showing that though the problem is computationally hard, heuristics, Majka, and Spencer 2008). In Montana, both the wolverine (Gulo gulo) and the Canada lynx (Lynx

  3. 196 Northwest Science, Vol. 79, Nos. 2&3, 2005 John R. Squires1

    E-print Network

    :jsquires@fs.fed.us Canada lynx (Lynx canadensis) in the contiguous U. S. reside in small, widely distributed patches and Fish Department, 260 Buena Vista, Lander, Wyoming 82520 Movements of a Male Canada Lynx Crossing the Greater Yellowstone Area, Including Highways Abstract From 1999­2001, a male Canada lynx engaged in yearly

  4. Synchrony in the snowshoe hare (Lepus americanus) cycle in northwestern North America, 19702012

    E-print Network

    Krebs, Charles J.

    and fur returns of Canada lynx (Lynx canadensis Kerr, 1792) in the boreal forest regions of Alaska, Yukon­2012. Broad-scale synchrony in lynx fur returns was strong from 1970 to about 1995 but then seemed to break into Alaska. A traveling wave of these cycles is clearly seen in the lynx fur returns from western Canada

  5. SPECIES PROFILE New Hampshire Wildlife Action Plan A-261

    E-print Network

    New Hampshire, University of

    [lynx (Lynx canadensis)]. In recent decades, bobcat populations in New Hampshire have declined pre (Lynx rufus) occupy wooded habitats that provide cover and allow for stalking or ambush (Anderson modeled with GIS using two approaches, empirical and mechanistic or process oriented. Bobcat Lynx rufus

  6. Short communicationWildl. Biol. 18: 215-224 (2012) DOI: 10.2981/10-105

    E-print Network

    2012-01-01

    .wildlifebiology.com Estimating detection probability for Canada lynx Lynx canadensis using snow-track surveys in the northern canadensis in known areas of lynx presence in the northern Rocky Mountains, Montana, USA during the winters, Lynx canadensis, monitoring, snow-track surveys John R. Squires & Lucretia E. Olson, U.S. Forest

  7. Epizootic and zoonotic helminths of the bobcat (Lynx rufus) in Illinois and a comparison of its helminth component communities across the American Midwest.

    PubMed

    Hiestand, Shelby J; Nielsen, Clayton K; Jiménez, F Agustín

    2014-01-01

    A total of 6257 helminths of 19 taxa were recovered from the digestive tract and lungs of 67 bobcats in Illinois. Infections caused by Alaria mustelae, Diphyllobothrium latum, and Macracanthorhynchus ingens are reported for the first time in bobcats. From all the taxa recovered, only three species occurred in high prevalence and caused intense infections: Taenia rileyi, Alaria marcianae, and Toxocara cati, with prevalence and mean intensity of 70% and 6; 42% and 193, and 25% and 14 individuals, respectively. Prevalence lower than 15% of 14 helminth species suggests bobcats are not continuously exposed to infective stages of a single parasite, and may be exposed to a large variety of generalists during their lifespan. No significant difference in parasite species according to host sex or age was detected, except for Diphyllobothrium spp., which were found more frequently in females and in trapped bobcats, and the hookworm, Ancylostoma caninum, which infected juveniles more frequently. Average species richness per infracommunity was 2.4 (±1.2), and the parasite component community showed low qualitative similarity with neighbor communities. The taxa A. caninum, Alaria spp., Diphyllobothrium spp., Paragonimus kellicotti, and T. cati are etiological agents of epizootic and zoonotic diseases. PMID:24521984

  8. Evolution of the Color-Magnitude relation in High-Redshift Clusters: Early-type Galaxies in the Lynx Supercluster at z~1.26

    E-print Network

    Mei, S; Demarco, R; Ford, H C; Franx, M; Holden, B P; Homeier, N L; Illingworth, G D; Jee, M J; Postman, M; Rettura, A; Rosati, P; Sirianni, M; Blakeslee, John P.; Demarco, Ricardo; Ford, Holland C.; Franx, Marijn; Holden, Brad P.; Homeier, Nicole L.; Illingworth, Garth D.; Jee, Myungkook J.; Mei, Simona; Postman, Marc; Rettura, Alessandro; Rosati, Piero; Sirianni, Marco

    2006-01-01

    Color-magnitude relations have been derived in the clusters RX J0849+4452 and RX J0848+4453 at z~1.26. The color-magnitude relation was determined from Advanced Camera for Surveys imaging in the WFC F775W (i_775) and F850LP (z_850) filters combined with ground-based spectroscopy. Early-type cluster candidates have been identified according to the Postman et al. morphological classification. In both clusters the bright red early-type population defines a tight color-magnitude relation very similar in color, although the two clusters present different X-ray luminosities and shapes, with RX J0849+4452 being three times more X-ray luminous and more compact, and having a temperature two times higher. The elliptical galaxy color-magnitude relations (CMR) in RX J0849+4452 and RX J0848+4453 show an intrinsic (i_775-z_850) color scatter of 0.026 +/- 0.012 mag and 0.024 +/- 0.015 mag, respectively, within 2 arcminutes (~1Mpc at z=1.26) from the cluster X-ray emission centers. Simple modeling of the scatters using stell...

  9. Evolution of the Color-Magnitude relation in High-Redshift Clusters: Early-type Galaxies in the Lynx Supercluster at z~1.26

    E-print Network

    Simona Mei; Brad P. Holden; John P. Blakeslee; Piero Rosati; Marc Postman; Myungkook J. Jee; Alessandro Rettura; Marco Sirianni; Ricardo Demarco; Holland C. Ford; Marijn Franx; Nicole L. Homeier; Garth D. Illingworth

    2006-04-04

    Color-magnitude relations have been derived in the clusters RX J0849+4452 and RX J0848+4453 at z~1.26. The color-magnitude relation was determined from Advanced Camera for Surveys imaging in the WFC F775W (i_775) and F850LP (z_850) filters combined with ground-based spectroscopy. Early-type cluster candidates have been identified according to the Postman et al. morphological classification. In both clusters the bright red early-type population defines a tight color-magnitude relation very similar in color, although the two clusters present different X-ray luminosities and shapes, with RX J0849+4452 being three times more X-ray luminous and more compact, and having a temperature two times higher. The elliptical galaxy color-magnitude relations (CMR) in RX J0849+4452 and RX J0848+4453 show an intrinsic (i_775-z_850) color scatter of 0.026 +/- 0.012 mag and 0.024 +/- 0.015 mag, respectively, within 2 arcminutes (~1Mpc at z=1.26) from the cluster X-ray emission centers. Simple modeling of the scatters using stellar population models from Bruzual and Charlot, gives a mean luminosity-weighted age t > 2.5 Gyr (z_f > 2.75). S0 galaxies follow the elliptical CMR; they show larger scatters about the CMR. The intrinsic scatter decreases and the CMR slopes are steeper at smaller radii, within both clusters. We conclude that old stellar populations in cluster elliptical galaxies are already in place at z=1.26, both in the more evolved cluster RX J0849+4452, and in its less evolved companion RX J0848+4453. Even at a lookback time of 9 Gyr, in the early merging and buildup of massive clusters, the bulk of the stellar content of the bright elliptical galaxy population was in place - apparently formed some 2.5~Gyr earlier at z~3

  10. Appendix C -1 Appendix C: Focal Wildlife Species

    E-print Network

    Dryocopus pileatus Pygmy nuthatch Sitta pygmaea Redhead Aythya americana Ring-billed gull Larus delawarensis rufus California myotis Myotis californicus #12;Appendix C - 3 Canada lynx Lynx canadensis Cougar Felis

  11. PROC. S. D. ACAD. SCL, VOL. 60 (1981) HELMINTHS OF SOUTH DAKOTA BOBCATS 1

    E-print Network

    1981-01-01

    bobcat (Lynx rufus) carcasses were obtained from fur dealers in South Dakota and examined for parasitic%). The acanthocephalan Oncicola canis occurred in 1 of 51 (2%) bob- cats. INTRODUCTION The bobcat (Lynx rufus

  12. Track Plates William 1;:Zielinski'

    E-print Network

    Standiford, Richard B.

    wolverine or lynx has been detected at these stations (M. Raphael, pers. comm.). In 1991 the technique that is capable of detecting all four species, although neither lynx nor wolverine has been detected. However

  13. 50 CFR 23.69 - How can I trade internationally in fur skins and fur skin products of bobcat, river otter, Canada...

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...river otter (Lontra canadensis ), and Canada lynx (Lynx canadensis ), and the Alaskan populations of gray wolf (Canis lupus ), and brown bear (Ursus arctos ). These species are included in Appendix II based on Article II(2)(b) of...

  14. 77 FR 14199 - Revision of Regulations Implementing the Convention on International Trade in Endangered Species...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-08

    ...canadensis), and the Alaskan populations of gray wolf (Canis lupus) and brown bear (Ursus arctos). For consistency and clarity...canadensis), Canada lynx (Lynx canadensis), gray wolf (Canis lupus), and brown bear (Ursus arctos) harvested in the...

  15. 50 CFR 23.69 - How can I trade internationally in fur skins and fur skin products of bobcat, river otter, Canada...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...river otter (Lontra canadensis ), and Canada lynx (Lynx canadensis ), and the Alaskan populations of gray wolf (Canis lupus ), and brown bear (Ursus arctos ). These species are included in Appendix II based on Article II(2)(b) of...

  16. 50 CFR 23.69 - How can I trade internationally in fur skins and fur skin products of bobcat, river otter, Canada...

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...river otter (Lontra canadensis ), and Canada lynx (Lynx canadensis ), and the Alaskan populations of gray wolf (Canis lupus ), and brown bear (Ursus arctos ). These species are included in Appendix II based on Article II(2)(b) of...

  17. 50 CFR 23.69 - How can I trade internationally in fur skins and fur skin products of bobcat, river otter, Canada...

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...river otter (Lontra canadensis ), and Canada lynx (Lynx canadensis ), and the Alaskan populations of gray wolf (Canis lupus ), and brown bear (Ursus arctos ). These species are included in Appendix II based on Article II(2)(b) of...

  18. http://www.jstor.org Capturing Beavers in Box Traps

    E-print Network

    DeStefano, Stephen

    , Kamler et al. 2002), lynx (Lynx canadensis) (Mowat et al. 1994, Kolbe et al. 2003), and raccoons (Procyon species such as beavers (Castor canadensis). Beavers typi- cally are live-captured with snares (Mc

  19. Research Note Summer Habitat Use by Snowshoe Hare and Mountain

    E-print Network

    Rocky Mountains are particularly important because of a current effort to reintroduce Canada lynx (Lynx canadensis), which is a specialized predator of snowshoe hare (Hodges 1999a,b, Colorado Division of Wildlife

  20. Contact: G. Sam Foster, Station Director, at gfoster@fs.fed.us or (970) 498-1353 http://www.fs.fed.us/rmrs/

    E-print Network

    -governmental organizations (e.g., The Nature Conservancy) Canada lynx, a federally Threatened snow-dependent species #12; specialists such as bull trout and Canada lynx and alpine plants such as the San Francisco Peaks groundsel

  1. Niche relations among three sympatric Mediterranean carnivores

    Microsoft Academic Search

    Jose M. Fedriani; Francisco Palomares; Miguel Delibes

    1999-01-01

    Previous studies carried out in the Doñana National Park reported that red foxes (Vulpes vulpes) were killed by Iberian lynxes (Lynx pardinus), whereas similar-sized Eurasian badgers (Meles meles) were not. Therefore, we predicted that fox would avoid lynx predation risk by niche segregation whereas we did not expect\\u000a such a segregation between badger and lynx. As an approach for evaluating

  2. Biology Graphs - Predator and Prey

    NSDL National Science Digital Library

    The phenomenon is the numerical relationship between the population growth of predator (lynx) and prey (hare) over a 90 year period as shown in a graph. The graph shows that as the population of hares increases, the population of lynx increases. As the population of lynx continue to increase, the population of hares decreases. Questions probe student thinking on this relationship and other factors that may impact the population of the hare and the lynx.

  3. Research Article Landscape Analysis of Bobcat Habitat in the Northern

    E-print Network

    Gehring, Thomas M.

    ABSTRACT Controversy over bobcat (Lynx rufus) management in the northern Lower Peninsula of Michigan (NLP, core area, habitat model, landscape, Lynx rufus, Michigan, Penrose distance, radiotelemetry, scent and monitor populations of furbearer species, including bobcats (Lynx rufus; Earle 2001, Rolley et al. 2001

  4. Habitat Relations Habitat Modeling Used to Predict Relative

    E-print Network

    Clark, William R.

    (Lynx rufus) from bowhunters with remotely-sensed data to build models that describe habitat Information Systems (GIS), habitat model, Iowa, Lynx rufus, relative abundance. In the last few decades). Bobcats (Lynx rufus) are the most broadly distributed felid in North America and populations

  5. Outbreak of Mycobacterium bovis infection in a wild animal park

    Microsoft Academic Search

    S. M. Schmidbauer; P. Wohlsein; G. Kirpal; A. Beineke; G. Müller; H. Müller; I. Moser; W. Baumgartner

    2007-01-01

    An outbreak of tuberculosis due to Mycobacterium bovis occurred in a wild animal park. Three pot-bellied pigs (Sus scrofa vittatus), one red deer (Cervus elaphus), one buffalo (Bison bonasus) and two European lynxes (Lynx lynx) were affected and showed clinical signs including weight loss, enlarged lymph nodes and paralysis of the hindlimbs. Postmortem examinations revealed multifocal granulomatous lesions in various

  6. 78 FR 76710 - Notice of Buy America Waiver for a Video Ready Access Device Cabinet

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-18

    ...the Charlotte Area Transit System's (CATS) LYNX Blue Line Extension project. This...the Charlotte Area Transit System's (CATS or City of Charlotte) LYNX Blue Line Extension...the utility relocation performed for the CATS LYNX BLE project. In an August 8,...

  7. A Bayesian hierarchical occupancy model for track surveys conducted in a series of linear, spatially

    E-print Network

    Dobrow, Bob

    , with repeat surveys required to model and account for uncertain detection. Using river otter Lontra canadensis canadensis, Markov model, otter, presence­absence, snow-track surveys, simulation, spatial correlation, Win lynx Lynx lynx (Lin- nell et al. 2007), white-tailed deer Odocoileus virginianus (D'Eon 2001), red fox

  8. Estimating snowshoe hare population density from pellet plots: a further evaluation

    E-print Network

    Krebs, Charles J.

    method raises the question of its spatial and temporal generality. The listing of the Canada lynx (Lynx canadensis) as a threatened species in the United States has stimulated much research on snowshoe hares as potential prey of lynx in the western states (Ruggiero et al. 2000), and pellet plots may become

  9. Measuring OS Support for Real-time CORBA ORBs

    E-print Network

    Schmidt, Douglas C.

    and evaluates the suitability of real- time operating systems, VxWorks and LynxOS, and general- purpose makes it unsuitable for real-time applications. Both LynxOS and VxWorks do enable predictable- dictability of TAO in several real-time operating systems, i.e., VxWorks and LynxOS, and operating systems

  10. letters to nature 426 NATURE |VOL 415 |24 JANUARY 2002 |www.nature.com

    E-print Network

    Palmer, Margaret A.

    . & Nicholson, M. The ten-year cycle in numbers of the lynx in Canada. J. Anim. Ecol. 11, 215±244 (1942). 2. Stenseth, N. C. et al. Common dynamic structure of Canada lynx populations within three climatic regions. B. & Ortega, Y. K. in Ecology and Conservation of Lynx in the United States (eds Ruggiero, L. F. et

  11. Theoretical Insights into the Population Viability

    E-print Network

    To conserve lynx we must rely on both applicable ecological theory and specific information about lynx ecology21 Chapter 2 Theoretical Insights into the Population Viability of Lynx Kevin S. McKelvey, USDA, Department of Zoology, University of British Columbia, Vancouver, BC V6T 1Z4 Canada Abstract--We discuss

  12. Overview of Forest Carnivore Survey Efforts in the Bitterroot Mountains

    Microsoft Academic Search

    Kerry R. Foresman

    Disturbance of forested habitats through natural or man-made causes is thought to adversely affect medium-sized carnivores such as the American marten (Martes americana), fisher (Martes pennanti), wolverine (Gulo gulo), and lynx (Lynx lynx). In order to recognize these impacts it is necessary to be able to accurately detect the presence of these species in both natural and disturbed habitats. This

  13. Large Carnivore Management in a MultiLevel Institutional Setting: Problems and Prospects

    Microsoft Academic Search

    Camilla Sandström; Jani Pellikka

    The goal of the large carnivore policies in Finland, Norway and Sweden (Fennoscandia) is to establish sustainable management of the four large (mammal) carnivores; bear ( ursus arctos ), wolf ( canis lupus ), lynx ( lynx lynx ) wolverine ( gulo gulo ) but also the golden eagle ( aquila chrysaetos ). Since this is clearly in conflict with

  14. Estimating cost functions for the four large carnivores in Sweden

    Microsoft Academic Search

    Göran Bostedt; Pontus Grahn

    2008-01-01

    The Swedish carnivore policy goal for the four large carnivores – wolverine (Gulo gulo), wolf (Canis lupus), brown bear (Ursus arctos) and lynx (Lynx lynx) – is to ensure a minimum viable population on a long-term basis. To reach this goal the policy restricts population regulation activities, like hunting (prohibited for wolverine and wolf and restricted for brown bear and

  15. Wildlife Report Roger L. Di Silvestro

    E-print Network

    DeStefano, Stephen

    . Although similar to the bobcat ( E rufus),the lynx can be distin- guished by its longer legs, larger feet-6044 ISBN 0-12-041000-1 PRINTEDINTllE UNITEDSTATES OF AMERICA #12;The Lynx Stephen DeStefano I1ni\\~ersir!oi I(:.r!io SPECIES DESCRIPTION AND NATURAL HISTORY The lynx (Felis lj~ns)is a predator of the Northern

  16. #!/bin/awk -f for (i = 1; i <= NF; i++)

    E-print Network

    Ooi, Wei Tsang

    =http://www.google.com/search pattern=' Web Results 1 - 10 ' var1=$(lynx -source ${url}?q=$(echo $1 | sed 's/ /+/g') \\ | sed 's/]*>//g' | grep "$pattern" | awk '{print $7}') var2=$(lynx -source ${url}?q=$(echo $2 | sed 's ]; then echo $1 wins else echo $2 wins fi May 26, 04 18:53 Page 1/1eg18-googlewar.sh #!/bin/bash lynx -source

  17. The cost of maturing early in a solitary carnivore

    Microsoft Academic Search

    Erlend B. Nilsen; Henrik Brøseth; John Odden; John D. C. Linnell

    2010-01-01

    Central to the theory of life history evolution is the existence of trade-offs between different traits, such as the trade-off\\u000a between early maturity and an extended period of body growth. Based on analysis of the reproductive tracts of harvested Eurasian\\u000a lynx (Lynx lynx) females in Norway, we find that females that mature early are generally heavier than those that postpone

  18. Predator-prey oscillations, synchronization and pattern formation in ecological systems

    Microsoft Academic Search

    Bernd Blasius; Ralf Tonjes

    Ecological systems and their component biological populations exhibit a broad spectrum of non-equilibrium dynamics ranging from characteristic natural cy-cles to more complex chaotic oscillations [1]. Perhaps the most spectacular example of this dynamic is Ecology's well known hare-lynx cycle. Despite unpredictable population fluctuations from one cycle to the next in the snow-shoe hare (Lepus americanus) and the Canadian lynx (Lynx

  19. The Ecology of northeast CoyotesCurrent Knowledge and Priorities for Future Research By Matthew E. Gompper

    E-print Network

    Gompper, Matthew E.

    , sharks, macaws, or lynx. That mission is achieved through a conservation program that protects some 50 since 1895. Bison reintroduction, legislation to protect endangered wildlife, and the establishment

  20. A sample of mJy radio sources at 1.4 GHz in the Lynx and Hercules fields - II. Cosmic evolution of the space density of FRI radio sources

    E-print Network

    Rigby, E E; Snellen, I A G

    2007-01-01

    In this paper the cosmic evolution of the space density of Fanaroff & Riley Class I (FRI) radio sources is investigated out to z ~ 1, in order to understand the origin of the differences between these and the more powerful FRIIs. High resolution radio images are presented of the best high redshift FRI candidate galaxies, drawn from two fields of the Leiden Berkeley Deep Survey, and previously defined in Rigby, Snellen & Best (2007, Paper I). Together with lower resolution radio observations (both previously published in Paper I and, for a subset of sources, also presented here) these are used to morphologically classify the sample. Sources which are clearly resolved are classified by morphology alone, whereas barely or unresolved sources were classified using a combination of morphology and flux density loss in the higher resolution data, indicative of resolved out extended emission. The space densities of the FRIs are then calculated as a function of redshift, and compared to both measurements of the...

  1. A sample of mJy radio sources at 1.4 GHz in the Lynx and Hercules fields - II. Cosmic evolution of the space density of FRI radio sources

    E-print Network

    E. E. Rigby; P. N. Best; I. A. G. Snellen

    2007-12-10

    In this paper the cosmic evolution of the space density of Fanaroff & Riley Class I (FRI) radio sources is investigated out to z ~ 1, in order to understand the origin of the differences between these and the more powerful FRIIs. High resolution radio images are presented of the best high redshift FRI candidate galaxies, drawn from two fields of the Leiden Berkeley Deep Survey, and previously defined in Rigby, Snellen & Best (2007, Paper I). Together with lower resolution radio observations (both previously published in Paper I and, for a subset of sources, also presented here) these are used to morphologically classify the sample. Sources which are clearly resolved are classified by morphology alone, whereas barely or unresolved sources were classified using a combination of morphology and flux density loss in the higher resolution data, indicative of resolved out extended emission. The space densities of the FRIs are then calculated as a function of redshift, and compared to both measurements of the local value and the behaviour of the more powerful FRIIs. The space density of FRI radio sources with luminosities (at 1.4 GHz) > 10^25 W/Hz is enhanced by a factor of 5-9 by z ~ 1, implying moderately strong evolution of this population; this enhancement is in good agreement with models of FRII evolution at the same luminosity. There are also indications that the evolution is luminosity dependent, with the lower powered sources evolving less strongly.

  2. Life Tracks Series.

    ERIC Educational Resources Information Center

    Brynildson, Inga

    Presented are descriptions of and information about various endangered species in Wisconsin. They include: the timber wolf (Canis lupus lycaon); Forester's tern (Sterna forsteri); the Canada lynx (Lynx canadensis); Higgins' eye pearly mussel (Lampsilis higginsii); the piping plover (Charadrius melodus); the osprey (Pandion haliaetus); the…

  3. Hunting behaviour of a sympatric felid and canid in relation to vegetative cover

    Microsoft Academic Search

    Dennis L. Murray; Stan Boutin; Mark O'Donoghue; Vilis O. Nams

    1995-01-01

    Carnivore foraging behaviour is suited for hunting in specific vegetative cover types and therefore is largely stereotypical within taxonomic families. Felids typically employ dense cover to stalk or ambush prey, whereas canids do not make use of vegetation when hunting. Sympatric lynx, Lynx canadensis, and coyotes, Canis latrans, were tracked in snow for three winters and hunting behaviour in relation

  4. PELLET COUNT INDICES COMPARED TO MARK-RECAPTURE ESTIMATES FOR EVALUATING SNOWSHOE HARE DENSITY

    Microsoft Academic Search

    L. SCOTT MILLS; KAREN E. HODGES

    Snowshoe hares (Lepus americanus) undergo remarkable cycles and are the primary prey base of Canada lynx (Lynx canadensis), a carnivore recently listed as threatened in the contiguous United States. Efforts to evalu- ate hare densities using pellets have traditionally been based on regression equations developed in the Yukon, Canada. In western Montana, we evaluated whether or not local regression equations

  5. JENNIFER A. FELTNER jafeltner@gmail.com 617-308-2175

    E-print Network

    Lewison, Rebecca

    concolor), black bears (Ursus americanus) and lynx (Lynx canadensis) · Identified species from camera trap bighorn sheep (Ovis canadensis) using radio telemetry; recorded observations, monitored health of lambs corridors for Peninsular desert bighorn sheep (Ovis canadensis nelsoni) and mountain lions using camera

  6. 1999 Macmillan Magazines Ltd letters to nature

    E-print Network

    Allen, Jont

    . The ten-yearcycle in numbersof the lynx in Canada. J. Anim. Ecol. 11, 215­ 244 (1942). 2. May, R. M in time across the spatial landscape. Field and model population studies of the Canadian hare­lynx cycle implications for conservation ecology. Even if a disturbance perturbs a local patch population to the brink

  7. First evidence of hemoplasma infection in free-ranging Namibian cheetahs (Acinonyx jubatus).

    PubMed

    Krengel, Annika; Meli, Marina L; Cattori, Valentino; Wachter, Bettina; Willi, Barbara; Thalwitzer, Susanne; Melzheimer, Jörg; Hofer, Heribert; Lutz, Hans; Hofmann-Lehmann, Regina

    2013-03-23

    Infections with feline hemotropic mycoplasmas (hemoplasmas) have been documented in domestic cats and free-ranging feline species with high prevalences in Iberian lynxes (Lynx pardinus), Eurasian lynxes (Lynx lynx), European wildcats (Felis silvestris silvestris), African lions (Panthera leo) in Tanzania and domestic cats in South Africa. The prevalence of hemoplasmas has not yet been investigated in free-ranging felids in southern Africa. In this study we screened 73 blood samples from 61 cheetahs in central Namibia for the presence of hemoplasmas using quantitative real-time PCR. One of the cheetahs tested PCR-positive. Phylogenetic analysis based on partial sequencing of the 16S rRNA and RNAse P genes revealed that the isolate belongs to the Mycoplasma haemofelis/haemocanis group. This is the first molecular evidence of a hemoplasma infection in a free-ranging cheetah. PMID:23123173

  8. Enhancing species distribution modeling by characterizing predator-prey interactions.

    PubMed

    Trainor, Anne M; Schmitz, Oswald J; Ivan, Jacob S; Shenk, Tanya M

    2014-01-01

    Niche theory is a well-established concept integrating a diverse array of environmental variables and multispecies interactions used to describe species geographic distribution. It is now customary to employ species distribution models (SDMs) that use environmental variables in conjunction with species location information to characterize species' niches and map their geographic ranges. The challenge remains, however, to account for the biotic interactions of species with other community members on which they depend. We show here how to connect species spatial distribution and their dependence with other species by modeling spatially explicit predator-prey interactions, which we call a trophic interaction distribution model (TIDM). To develop the principles, we capitalized on data from Canada lynx (Lynx canadensis) reintroduced into Colorado. Spatial location information for lynx obtained from telemetry was used in conjunction with environmental data to construct an SDM. The spatial locations of lynx-snowshoe hare encounters obtained from snow-tracking in conjunction with environmental data were used to construct a TIDM. The environmental conditions associated with lynx locations and lynx-hare encounters identified through both SDM and TIDM revealed an initial transient phase in habitat use that settled into a steady state. Nevertheless, despite the potential for the SDM to broadly encompass all lynx hunting and nonhunting spatial locations, the spatial extents of the SDM and TIDM differed; about 40% of important lynx-snowshoe hare locations identified in the TIDM were not identified in the lynx-only SDM. Our results encourage greater effort to quantify spatial locations of trophic interactions among species in a community and the associated environmental conditions when attempting to construct models aimed at projecting current and future species geographic distributions. PMID:24640545

  9. Toxoplasma gondii antibodies in exotic wild felids from Brazilian zoos.

    PubMed

    Silva, J C; Ogassawara, S; Marvulo, M F; Ferreira-Neto, J S; Dubey, J P

    2001-09-01

    Serum samples from 37 captive exotic felids in 12 zoos from six Brazilian states were assayed for antibodies to Toxoplasma gondii by the modified agglutination test using formalin-fixed whole tachyzoites. Titers greater than or equal to 1:20 were considered positive. Antibodies to T. gondii were found in 24 of 37 (64.9%) felids, including one European lynx (Lynx lynx), two jungle cats (Felis chaus), two servals (Leptailurus serval), two tigers (Panthera tigris), three leopards (Panthera pardus), and 14 of 27 lions (Panthera leo). This is the first serologic analysis for T. gondii infection in exotic wild felids from Brazilian zoos. PMID:12785684

  10. Snow Tracking JamesC. Halfpenny,' RichardW.Thompson,' Susan C. Morse,'

    E-print Network

    Standiford, Richard B.

    marten, fisher, lynx, and wolverine (MFLW). Because detection is the goal, such surveys do not require, such as wolverine dens, are more visible from the air (Magoun in Golden 1993) but require training to recognize

  11. The Impacts of Three Common Mesopredators on the Reintroduced Population of Eastern Wild Turkeys in Texas

    E-print Network

    Melville, Haemish 1972-

    2012-11-15

    of mesopredators on the wild turkey population in the Pineywoods. Raccoons (Procyon lotor), bobcats (Lynx rufus) and coyotes (Canis latrans) occur sympatrically in east Texas and are thought to prey on wild turkeys, their nests and poults. I fitted bobcats...

  12. Using automatically-triggered cameras to monitor and estimate bobcat abundance

    E-print Network

    Heilbrun, Richard David

    2002-01-01

    and estimate the number of bobcats (Lynx rufus) in a population might be more useful to managers and researchers than traditional methods involving scent stations and physical capture. This study evaluated whether bobcats could be surveyed using automatically...

  13. Ranges, movements, and spatial distribution of radio-tagged Rio Grande wild turkeys in the Edwards Plateau of Texas

    E-print Network

    Schaap, Jody Neal

    2006-08-16

    and Stringer 1975). Predator abundance for both regions was analyzed by Willsey (2003), and concentrated on bobcats (Lynx rufus), coyotes (Canis latrans), and raccoons (Procyon lotor) as predators of both nests and all age classes of turkeys (Glazener...

  14. Population Dynamics of Plain Chachalacas in the Lower Rio Grande Valley

    E-print Network

    Gandaria, Adan G.

    2011-02-22

    of radio harness. Mammalian predation (43%, n = 6) and unknown (43%, n = 6) deaths accounted for the majority of mortality observed. The remainder of observed mortality included avian predators (14%, n = 2). In most instances, bobcats (Lynx rufus...

  15. 77 FR 71041 - Endangered and Threatened Wildlife and Plants; Designation of Critical Habitat for the Southern...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-28

    ...or protect other listed species such as gray wolves (Canis lupus), grizzly bears (Ursus arctos horribilis), Canada lynx...including mountain lions (Felis concolor), wolves (Canis lupus), coyotes (Canis latrans), wolverines (Gulo gulo...

  16. 78 FR 53002 - Notice of Proposed Buy America Waiver for a Video Ready Access Device Cabinet

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-27

    ...SUMMARY: The Charlotte Area Transit System (CATS) requested a waiver of the Federal Transit Administration...This utility relocation will be performed in connection with the CATS LYNX Blue Line Extension (BLE) project, which is an...

  17. RESEARCH ARTICLE Linking movement behavior and fine-scale genetic structure

    E-print Network

    Clark, William R.

    connectivity for bobcats (Lynx rufus) Dawn M. Reding · Samuel A. Cushman · Todd E. Gosselink · William R. Clark Mountain Research Station, 2500 S Pine Knoll Dr., Flagstaff, AZ 86001, USA T. E. Gosselink Chariton

  18. Selecting Habitat to Survive: The Impact of Road Density on Survival in a Large Carnivore

    PubMed Central

    Basille, Mathieu; Van Moorter, Bram; Herfindal, Ivar; Martin, Jodie; Linnell, John D. C.; Odden, John; Andersen, Reidar; Gaillard, Jean-Michel

    2013-01-01

    Habitat selection studies generally assume that animals select habitat and food resources at multiple scales to maximise their fitness. However, animals sometimes prefer habitats of apparently low quality, especially when considering the costs associated with spatially heterogeneous human disturbance. We used spatial variation in human disturbance, and its consequences on lynx survival, a direct fitness component, to test the Hierarchical Habitat Selection hypothesis from a population of Eurasian lynx Lynx lynx in southern Norway. Data from 46 lynx monitored with telemetry indicated that a high proportion of forest strongly reduced the risk of mortality from legal hunting at the home range scale, while increasing road density strongly increased such risk at the finer scale within the home range. We found hierarchical effects of the impact of human disturbance, with a higher road density at a large scale reinforcing its negative impact at a fine scale. Conversely, we demonstrated that lynx shifted their habitat selection to avoid areas with the highest road densities within their home ranges, thus supporting a compensatory mechanism at fine scale enabling lynx to mitigate the impact of large-scale disturbance. Human impact, positively associated with high road accessibility, was thus a stronger driver of lynx space use at a finer scale, with home range characteristics nevertheless constraining habitat selection. Our study demonstrates the truly hierarchical nature of habitat selection, which aims at maximising fitness by selecting against limiting factors at multiple spatial scales, and indicates that scale-specific heterogeneity of the environment is driving individual spatial behaviour, by means of trade-offs across spatial scales. PMID:23874381

  19. PELLET COUNT INDICES COMPARED TO MARK–RECAPTURE ESTIMATES FOR EVALUATING SNOWSHOE HARE DENSITY

    Microsoft Academic Search

    L. SCOTT MILLS; PAUL C. GRIFFIN; KAREN E. HODGES; KEVIN McKELVEY; LEN RUGGIERO; TODD ULIZIO

    2005-01-01

    Abstract: Snowshoe,hares (Lepus americanus) undergo remarkable,cycles and are the primary,prey base of Canada lynx (Lynx canadensis), a carnivore recently listed as threatened in the contiguous United States. Efforts to evalu- ate hare densities using pellets have traditionally been based on regression equations developed in the Yukon, Canada. In western Montana, we evaluated whether or not local regression equations performed better

  20. UV-B-induced plant stress as a possible cause of ten-year hare cycles

    Microsoft Academic Search

    Vidar Selås

    2006-01-01

    Predation has been assumed to be a necessary factor in the ten-year population cycle of the snowshoe hare (Lepus americanus) and Canadian lynx (Lynx canadensis). The UV-B-induced plant stress hypothesis, in contrast, predicts that hare performance, especially reproduction, is negatively related to sunspot numbers, because production of UV-B-protective phenolics in food plants in periods of low sunspot activity, when the

  1. Worldwide occurrence of feline hemoplasma infections in wild felid species.

    PubMed

    Willi, Barbara; Filoni, Claudia; Catão-Dias, José L; Cattori, Valentino; Meli, Marina L; Vargas, Astrid; Martínez, Fernando; Roelke, Melody E; Ryser-Degiorgis, Marie-Pierre; Leutenegger, Christian M; Lutz, Hans; Hofmann-Lehmann, Regina

    2007-04-01

    While hemoplasma infections in domestic cats are well studied, almost no information is available on their occurrence in wild felids. The aims of the present study were to investigate wild felid species as possible reservoirs of feline hemoplasmas and the molecular characterization of the hemoplasma isolates. Blood samples from the following 257 wild felids were analyzed: 35 Iberian lynxes from Spain, 36 Eurasian lynxes from Switzerland, 31 European wildcats from France, 45 lions from Tanzania, and 110 Brazilian wild felids, including 12 wild felid species kept in zoos and one free-ranging ocelot. Using real-time PCR, feline hemoplasmas were detected in samples of the following species: Iberian lynx, Eurasian lynx, European wildcat, lion, puma, oncilla, Geoffroy's cat, margay, and ocelot. "Candidatus Mycoplasma haemominutum" was the most common feline hemoplasma in Iberian lynxes, Eurasian lynxes, Serengeti lions, and Brazilian wild felids, whereas "Candidatus Mycoplasma turicensis" was the most prevalent in European wildcats; hemoplasma coinfections were frequently observed. Hemoplasma infection was associated with species and free-ranging status of the felids in all animals and with feline leukemia virus provirus-positive status in European wildcats. Phylogenetic analyses of the 16S rRNA and the partial RNase P gene revealed that most hemoplasma isolates exhibit high sequence identities to domestic cat-derived isolates, although some isolates form different subclusters within the phylogenetic tree. In conclusion, 9 out of 15 wild felid species from three different continents were found to be infected with feline hemoplasmas. The effect of feline hemoplasma infections on wild felid populations needs to be further investigated. PMID:17301277

  2. The influence of snowmobile trails on coyote movements during winter in high-elevation landscapes.

    PubMed

    Gese, Eric M; Dowd, Jennifer L B; Aubry, Lise M

    2013-01-01

    Competition between sympatric carnivores has long been of interest to ecologists. Increased understanding of these interactions can be useful for conservation planning. Increased snowmobile traffic on public lands and in habitats used by Canada lynx (Lynx canadensis) remains controversial due to the concern of coyote (Canis latrans) use of snowmobile trails and potential competition with lynx. Determining the variables influencing coyote use of snowmobile trails has been a priority for managers attempting to conserve lynx and their critical habitat. During 2 winters in northwest Wyoming, we backtracked coyotes for 265 km to determine how varying snow characteristics influenced coyote movements; 278 km of random backtracking was conducted simultaneously for comparison. Despite deep snow (>1 m deep), radio-collared coyotes persisted at high elevations (>2,500 m) year-round. All coyotes used snowmobile trails for some portion of their travel. Coyotes used snowmobile trails for 35% of their travel distance (random: 13%) for a mean distance of 149 m (random: 59 m). Coyote use of snowmobile trails increased as snow depth and penetrability off trails increased. Essentially, snow characteristics were most influential on how much time coyotes spent on snowmobile trails. In the early months of winter, snow depth was low, yet the snow column remained dry and the coyotes traveled off trails. As winter progressed and snow depth increased and snow penetrability increased, coyotes spent more travel distance on snowmobile trails. As spring approached, the snow depth remained high but penetrability decreased, hence coyotes traveled less on snowmobile trails because the snow column off trail was more supportive. Additionally, coyotes traveled closer to snowmobile trails than randomly expected and selected shallower snow when traveling off trails. Coyotes also preferred using snowmobile trails to access ungulate kills. Snow compaction from winter recreation influenced coyote movements within an area containing lynx and designated lynx habitat. PMID:24367565

  3. The Influence of Snowmobile Trails on Coyote Movements during Winter in High-Elevation Landscapes

    PubMed Central

    Gese, Eric M.; Dowd, Jennifer L. B.; Aubry, Lise M.

    2013-01-01

    Competition between sympatric carnivores has long been of interest to ecologists. Increased understanding of these interactions can be useful for conservation planning. Increased snowmobile traffic on public lands and in habitats used by Canada lynx (Lynx canadensis) remains controversial due to the concern of coyote (Canis latrans) use of snowmobile trails and potential competition with lynx. Determining the variables influencing coyote use of snowmobile trails has been a priority for managers attempting to conserve lynx and their critical habitat. During 2 winters in northwest Wyoming, we backtracked coyotes for 265 km to determine how varying snow characteristics influenced coyote movements; 278 km of random backtracking was conducted simultaneously for comparison. Despite deep snow (>1 m deep), radio-collared coyotes persisted at high elevations (>2,500 m) year-round. All coyotes used snowmobile trails for some portion of their travel. Coyotes used snowmobile trails for 35% of their travel distance (random: 13%) for a mean distance of 149 m (random: 59 m). Coyote use of snowmobile trails increased as snow depth and penetrability off trails increased. Essentially, snow characteristics were most influential on how much time coyotes spent on snowmobile trails. In the early months of winter, snow depth was low, yet the snow column remained dry and the coyotes traveled off trails. As winter progressed and snow depth increased and snow penetrability increased, coyotes spent more travel distance on snowmobile trails. As spring approached, the snow depth remained high but penetrability decreased, hence coyotes traveled less on snowmobile trails because the snow column off trail was more supportive. Additionally, coyotes traveled closer to snowmobile trails than randomly expected and selected shallower snow when traveling off trails. Coyotes also preferred using snowmobile trails to access ungulate kills. Snow compaction from winter recreation influenced coyote movements within an area containing lynx and designated lynx habitat. PMID:24367565

  4. Native predators reduce harvest of reindeer by Sámi pastoralists.

    PubMed

    Hobbs, N Thompson; Andrén, Henrik; Persson, Jens; Aronsson, Malin; Chapron, Guillaume

    2012-07-01

    Contemporary efforts to protect biological diversity recognize the importance of sustaining traditional human livelihoods, particularly uses of the land that are compatible with intact landscapes and ecologically complete food webs. However, these efforts often confront conflicting goals. For example, conserving native predators may harm pastoralist economies because predators consume domestic livestock that sustain people. This potential conflict must be reconciled by policy, but such reconciliation requires a firm understanding of the effects of predators on the prey used by people. We used a long-term, large-scale database and Bayesian models to estimate the impacts of lynx (Lynx lynx), wolverine (Gulo gulo), and brown bear (Ursus arctos) on harvest of semi-domesticated reindeer (Rangifer tarandus) by Sami pastoralists in Sweden. The average annual harvest of reindeer averaged 25% of the population (95% credible interval = 19, 31). Annual harvest declined by 96.6 (31, 155) reindeer for each lynx family group (the surveyed segment of the lynx population) in a management unit and by 94.3 (20, 160) for each wolverine reproduction (the surveyed segment of the wolverine population). We failed to detect effects of predation by brown bear. The mechanism for effects of predation on harvest was reduced population growth rate. The rate of increase of reindeer populations declined with increasing abundance of lynx and wolverine. The density of reindeer, latitude, and weather indexed by the North Atlantic Oscillation also influenced reindeer population growth rate. We conclude that there is a biological basis for compensating the Sámi reindeer herders for predation on reindeer. PMID:22908719

  5. J. Pelham S. Kosiba Community Ecology

    E-print Network

    Harms, Kyle E.

    ) Books · Animal Ecology (1927) · Voles, Mice, and Lemmings (1942) · Ecology (1924) · PopulaEons of voles, lemmings, hares, lynx ­ MulE-annual periodic fluctua for periodicity h>p://blog.nature.org/science/files/2014/01/lemming-2.jpg h>p://exhibits.museum

  6. pestplant cycles or even single-species dynamics with second-order delays such as maternal effects, which lead to periods of over 6T (ref. 24). The last would increase the

    E-print Network

    Sereno, Martin

    period in years exceeded 4TC þ 2TR; in series involving lynx (average maturation time ¼ 1.5 years. 27. This technique avoids the often arbitrary choice of data tapering by using a series of optimal.05. If there were missing values, we analysed the longest continuous segment of the data. If, upon visual inspection

  7. Tracking indices as measures of synchronization of isotopic temperature of NZ abalone shells with ambient water temperature

    Microsoft Academic Search

    S. W. Kim; I. L. Hudson

    Synchrony, synchronistic occurrence, has been studied in population dynamics, health science and in phenology. Moran (1953) first introduced the concept of synchrony between population dynamics and concomitant weather conditions using Canadian lynx data showing that the degree of synchrony decreases with increasing distance and since then, it has been studied in various areas of research. Although spatial synchrony, which considers

  8. Rabies antibody prevalence and virus tissue tropism in wild carnivores in Virginia.

    PubMed

    Carey, A B; McLean, R G

    1978-10-01

    Carnivores trapped in a rabies control program in Virginia were examined for rabies virus and serum neutralizing antibody. Local antibody prevalence ranged from 0% to 29% in gray foxes (Urocyon cinereoargenteus). Rabies virus was pantropic in naturally infected gray foxes and a bobcat (Lynx rufus). PMID:739588

  9. Impact of Natural and Artificial Barriers to Dispersal on the Population Structure of Bobcats

    Microsoft Academic Search

    DEVIN G. MILLIONS; BRADLEY J. SWANSON

    2007-01-01

    We investigated population structure and genetic diversity for bobcats (Lynx rufus) in Michigan, USA, which are distributed throughout the upper peninsula (UP) and the northern half of the lower peninsula (LP) of Michigan. Specifically, we assessed the influence of natural and artificial barriers to dispersal on the genetic population structure of the bobcat across Michigan, as well as in each

  10. Zoonotic parasites of bobcats around human landscapes.

    PubMed

    Carver, Scott; Scorza, Andrea V; Bevins, Sarah N; Riley, Seth P D; Crooks, Kevin R; Vandewoude, Sue; Lappin, Michael R

    2012-09-01

    We analyzed Lynx rufus fecal parasites from California and Colorado, hypothesizing that bobcats shed zoonotic parasites around human landscapes. Giardia duodenalis, Cryptosporidium, Ancylostoma, Uncinaria, and Toxocara cati were shed. Toxoplasma gondii serology demonstrated exposure. Giardia and Cryptosporidium shedding increased near large human populations. Genotyped Giardia may indicate indirect transmission with humans. PMID:22718941

  11. Small Pleistocene felines of North America

    Microsoft Academic Search

    Lars Werdelin

    1985-01-01

    This paper summarizes the currently available fossil record of small felines in North America. Felis amnicola Gillette is shown by statistical methods to be conspecific with F. wiedii and is proposed as a subspecies F. wiedii amnicola. Pre-Wisconsinan specimens of Lynx rufus are brought together as L. rufus calcaratus. The occurrence of F. yagouaroundi in post-Hemphillian deposits of North America

  12. Evidence of a Limited Schizogonous Cycle for cytauxzoon fells in Bobcats Following Exposure to Infected Ticks

    Microsoft Academic Search

    Edmour F. Blouin; A. Alan Kocan; Katherine M. Kocan; Jakie Hair

    Schizogonous tissue stages of Cy- tauxzoon felis (Apicomplexa: Theileridae) were not observed by microscopic evaluation of impression smears of liver, spleen, lung and lymph nodes in 10 bobcats (Lynx rufus) from Oklahoma with naturally occurring piroplasm infections. Schizogonous stages were observed in similar tissues from experimentally-infected bobcats at 1 1 days postexposure to infected Der- macentor variabilis, but not at

  13. Habitat Use of Bobcats at Two Spatial Scales in Southwestern Georgia

    Microsoft Academic Search

    Ivy A. Godbois; Joseph W. Jones; L. Mike Conner; Robert J. Warren

    2003-01-01

    Habitat needs of wildlife are important for science-based wildlife manage- ment. Further, these needs may differ based upon the ecosystem in which the species lives. Bobcat habitat use within the longleaf pine (Pinus palustris) forest ecosystem has received little attention. Therefore, we monitored 21 bobcats (Lynx rufus) (8 M, 13 F) during 2001-2002 in southwestern Georgia to determine habitat use

  14. A Multivariate Habitat Model for Female Bobcats: A GIS Approach

    Microsoft Academic Search

    L. Mike Conner; Bruce D. Leopold

    We developed a Geographical Information System (GIS) based habitat model for female bobcats (Lynx rufus) and subjected the model to internal-validation, cross- validation, and validation using independent data. The model predicted probability of an area being used by female bobcats increased (P <0.001) as slope and distance to ma- ture pine stands increased. Probability of an area being used by

  15. An Application of Manel's Model: Detecting Bobcat Poaching in Michigan

    Microsoft Academic Search

    DEVIN G. MILLIONS; BRADLEY J. SWANSON

    2006-01-01

    The illegal harvest of natural resources (i.e., poaching) has the potential to threaten the persistence of many plant and animal species. In Michigan bobcats (Lynx rufus) are distributed throughout the Upper Peninsula (UP) and the northern half of the Lower Peninsula (LP) and are a biologically and economically important species. The popularity of bobcat hunting and trapping in Michigan, along

  16. The rise and fall of bobcat populations in New Hampshire: Relevance of historical harvests to understanding current patterns of abundance and distribution

    Microsoft Academic Search

    J. A. Litvaitis; J. P. Tash; C. L. Stevens

    2006-01-01

    Harvest records reveal that populations of bobcats (Lynx rufus) in New Hampshire have undergone substantial changes during the past 200 years. In the 1800s, a nearly continuous bounty program resulted in annual harvests that averaged ?30 bobcats. Harvests increased in 1915, and fluctuated from 100 to 400 bobcats during the 1920s through the 1950s. In 1959, harvests peaked at 421

  17. Last updated: 10/29/10 TODD D. STEURY

    E-print Network

    Steury, Todd D.

    of delayed dispersal in the cooperatively breeding red wolf (Canis rufus). Behavioral Ecology. McCoy, J.C., S wolf (Canis rufus). Proceedings of the Royal Society of London, Series B. Available in print on breeding duck populations (1955-2005). Ecology 91:571- 581. 2008 Murray, D.L., and T.D. Steury. Lynx

  18. EXPOSURE TO FELINE AND CANINE PATHOGENS IN BOBCATS AND GRAY FOXES IN URBAN AND RURAL ZONES OF A NATIONAL PARK IN CALIFORNIA

    Microsoft Academic Search

    Seth P. D. Riley; Janet Foley; Bruno Chomel

    Exposure of bobcats (Lynx rufus) and gray foxes (Urocyon cinereoargenteus )t o a range of common canine and feline pathogens was assessed in urban and rural zones of Golden Gate National Recreation Area, a National Park in the San Francisco Bay Area, (California, USA) from 1992 to 1995. Testing included serology for canine distemper virus, canine parvovirus (CPV), canine adenovirus,

  19. RABIES ANTIBODY PREVALENCE AND VIRUS TISSUE TROPISM IN WILD CARNIVORES IN VIRGINIA

    Microsoft Academic Search

    ANDREW B. CAREYPVirginia; ROBERT G. MC LEAN

    Carnivores trapped in a rabies control program in Virginia were examined for rabies virus and serum neutralizing antibody. Local antibody prevalence ranged from 0% to 29% in gray foxes (Urocyon cinereoargenteus). Rabies virus was pantropic in naturally infected gray foxes and a bobcat (Lynx rufus).

  20. Spatial Organization of Adult Bobcats in a Longleaf Pine-Wiregrass Ecosystem in Southwestern Georgia

    Microsoft Academic Search

    Jessica C. Cochrane; Jordona D. Kirby; Ivy G. Jones; L. Mike Conner; Robert J. Warren

    2006-01-01

    Lynx rufus (bobcat) home-range sizes have been studied throughout the Southeast, but study duration is generally î 2 years and number of bobcats sampled is often < 20. There have been even fewer studies dealing with spatial interactions of bobcats, and fewer still within a Pinus palustris (longleaf pine) ecosystem. Because both bobcat home-range sizes and the degree that space

  1. Modelling habitat overlap among sympatric mesocarnivores in southern Illinois, USA

    Microsoft Academic Search

    Patrick T. McDonald; Clayton K. Nielsen; Tonny J. Oyana; Wanxiao Sun

    2008-01-01

    Few researchers have developed large-scale habitat models for sympatric carnivore species. We created habitat models for red foxes (Vulpes vulpes), coyotes (Canis latrans) and bobcats (Lynx rufus) in southern Illinois, USA, using the Penrose distance statistic, remotely sensed landscape data, and sighting location data within a GIS. Our objectives were to quantify and spatially model potential habitat differences among species.

  2. Environmental influences on the sexual dimorphism in body size of western bobcats

    Microsoft Academic Search

    F. Stephen Dobson; John D. Wigginton

    1996-01-01

    Sexual size dimorphism might be influenced by environmental constraints on sexual selection or by intraspecific competition between males and females. We studied bobcats (Lynx rufus) in collections of museum specimens from western North America to examine these hypotheses. Structural body size was estimated from several measurements of the skull, ln-transformed and indexed through principal components analysis. Sexual dimorphism in body

  3. The Effectiveness of Individual Identification of Bobcats using Automatically Triggered Cameras in Michigan

    Microsoft Academic Search

    Karen Ickes; Paul Keenlance

    2009-01-01

    Through the research of bobcat (Lynx rufus) populations a better understanding of their range in lower Michigan can be found. The use of automatically triggered cameras is an effective way to obtain bobcat range and status information. Automatically triggered cameras allow for population studies to be executed without having to trap any animals.

  4. Seroprevalence of Toxoplasma gondii infection in captive mammals in three zoos in Mexico City, Mexico

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Antibodies to Toxoplasma gondii were determined in 167 mammals in 3 zoos in Mexico City, Mexico using the modified agglutination test (MAT). Overall, antibodies to T. gondii were found in 89 (53.3%) of the 167 animals tested. Antibodies were found in 35 of 43 wild Felidae: 2 of 2 bobcats (Lynx rufus...

  5. Home range and diet of bobcats in eastern Tennessee

    Microsoft Academic Search

    J. T. Kitchings; J. D. Story

    1979-01-01

    Interest in the status of the bobcat (Lynx rufus rufus) on the Department of Energy's Oak Ridge Reservation has stemmed concomitantly from a desire to learn more of the habits of this animal and to monitor the effects of anthropogenic activities on these habits. We have begun a long-term program to acquire data on home ranges, population density, habitat usage,

  6. Bobcat Home Range Size Relative to Habitat Quality

    Microsoft Academic Search

    L. Mike Conner; Joseph W. Jones; Michael J. Chamberlain; Bruce D. Leopold

    2001-01-01

    Bobcat (Lynx rufus) home range is generally considered to be a function of habitat quality, but there have been few published studies that explicitly address this idea. We used empirically developed bobcat habitat models to predict habitat quality within bobcat home ranges on 2 study areas in central Mississippi. We then assessed the relationship between home range size and habitat

  7. Bobcat Diet on an Area Managed for Northern Bobwhite

    Microsoft Academic Search

    Ivy A. Godbois; Joseph W. Jones; L. Mike Conner; Robert J. Warren

    2003-01-01

    We quantified bobcat (Lynx rufus) diet on a longleaf pine (Pinus palustris) dominated area managed for northern bobwhite (Colinus virginianus), hereafter quail. We sorted prey items to species when possible, but for analysis we categorized them into 1 of 5 classes: rodent, bird, deer, rabbit, and other species. Bobcat diet did not dif- fer seasonally (X2 = 17.82, P =

  8. HELMINTHS OF SOUTH DAKOTA BOBCATS 1

    Microsoft Academic Search

    Elizabeth C. Schitoskey

    During the trapping season of 1977-78 and 1978-79, 51 bobcat (Lynx rufus) carcasses were obtained from fur dealers in South Dakota and examined for parasitic helminths. Diaphragm, tongue, and masseter muscle samples from 153 bobcats were examined for trichinosis. Nematodes located included Toxascaris leonina in 46 of 51 (90%), Toxocara mystax in 2 of 51 (4%). Physaloptera prae­ putialis in

  9. Hepatozoon sp. in wild carnivores in Texas.

    PubMed

    Mercer, S H; Jones, L P; Rappole, J H; Twedt, D; Lack, L L; Craig, T M

    1988-07-01

    Twelve coyotes (Canis latrans), three bobcats (Lynx rufus) and six ocelots (Felis pardalis) from the Gulf Coast of Texas were infected with Hepatozoon sp. The geographic distribution of infected wild animals coincides with the highest prevalence of Hepatozoon canis infection in domestic dogs for which the wild species may act as a reservoir. PMID:3411720

  10. Bobcat Spatial Distribution and Habitat Use Relative to

    Microsoft Academic Search

    GREGORY S. LYNCH; Joseph W. Jones; JORDONA D. KIRBY; ROBERT J. WARREN; Daniel B. Warnell

    Understanding interactions among bobcats (Lynx rufus) may lend insight into less understood life history traits of the bobcat and improve management of the species. Moreover, data from manipulative experiments pertaining to bobcat ecology are largely absent from the scientific literature. Therefore, we investigated bobcat spatial organization and habitat use after an experimental population reduction on an 11,735-ha study site in

  11. Decomposition of baseline noise sources in hard disk position error signals using the PES Pareto method

    Microsoft Academic Search

    Daniel Abramovitch; Terril Hurst; Dick Henze

    1997-01-01

    This paper uses the position error signal (PES) Pareto method and measurement techniques for isolating noise sources to decompose the PES of a Lynx II hard disk drive manufactured by Hewlett-Packard. This accomplishes three things: it demonstrates the utility of the PES Pareto method in a practical example, it allows us to discover which noise sources are insignificant to PES,

  12. Widespread occurrence of the inverse square distribution in social sciences and taxonomy Guido Caldarelli,1,2

    E-print Network

    Caldarelli, Guido

    Widespread occurrence of the inverse square distribution in social sciences and taxonomy GuidoRevE.69.035101 PACS number s : 89.75.Fb, 89.75.Hc, 05.40. a, 05.65. b Taxonomy is one of the major, in biology four different species e.g., lions, tigers, lynxes, and cats can be grouped into two genera lions

  13. Middle Snake Draft Assessment 245 May 2004 4 References

    E-print Network

    of Forestry 78:460­464. Aubry, K. B., Koehler, G. M., and J. R. Squires. 2000. Ecology of Canada Lynx., B.J. Flatter, J. Nelson and C. Medrow. 1998. Redband Trout Oncorhynchus mykiss gairdneri Population in Southern Boreal Forests. In: L. F. Ruggiero, K. B. Aubry, S. W. Buskirk, G. M. Koehler, C. J. Krebs, K. S

  14. A Juvenile Sichuan Golden Monkey (Rhinopithecus roxellana) Predated by a Goshawk (Accipiter gentilis) in the Qinling Mountains

    Microsoft Academic Search

    Shuyi Zhang; Baoping Ren; Baoguo Li

    1999-01-01

    It has been suggested that hawks, panthers, jackals, lynxes and wolves may prey on Sichuan golden monkeys in the wild [1, 2], but all these assumptions were based on observations of dead monkeys eaten by predators, and no direct attack of a living individual has been witnessed. During our field study on the behavioural ecology of Sichuan snub-nosed monkeys in

  15. Nesting ecology of Rio Grande wild turkeys in the Edwards Plateau of Texas

    E-print Network

    Dreibelbis, Justin Zachary

    2009-05-15

    Wild Turkey nests in the Edwards Plateau, Texas, 2006?2007 (n = number of nests with photographed predation events). Species 2006 (n = 7 nests) 2007 (n = 11 nests) Nine-banded armadillo (Dasypus novemcinctus) 0 1 Bobcat (Lynx rufus) 0 1...

  16. Sylvatic trichinosis in Canada.

    PubMed Central

    Smith, H J; Snowdon, K E

    1988-01-01

    Pepsin digestion of musculature from 2253 animals revealed that sylvatic trichinosis occurred in various species of mammals from the eastern to the western Arctic and extended down into the Rocky Mountain and Foothills regions of western Canada. Infections were demonstrated in Arctic fox, red fox, wolf, raccoon, coyote, lynx, bobcat and dog. PMID:3196978

  17. World Wide Web Information Retrieval Using Web Connectivity Information

    E-print Network

    of the Companion algorithm. The prototype consists of a web spider, local database, and search software. The system was written using the Java programming language. Our spider crawls and downloads web pages using Lynx ........................................................... 6 2.2 Web Spiders ..................................................................... 8 2

  18. (continued on page 2) Research Highlights ................. (p. 4)

    E-print Network

    structure is important. The Forest Service is comprised of three major branches: the National Forest System management, cred- ible science is prerequisite to informed public discourse. This lynx research by Forest Burcham) Leonard F. Ruggiero, Deputy Program Manager, Wildlife and Terrestrial Habitats Science Program

  19. Searcher Response in a Hypertext-Based Bibliographic Information Retrieval System.

    ERIC Educational Resources Information Center

    Dimitroff, Alexandra; Wolfram, Dietmar

    1995-01-01

    Describes a study of graduate students that examined search behavior and affective response to a hypertext-based bibliographic information retrieval system called HyperLynx for searchers with different search skills and backgrounds. Previous experience with hypertext or Boolean searching is examined, and search times are discussed. (21 references)…

  20. Massive star formation in a gravitationally-lensed H II galaxy at z=3.357

    NASA Technical Reports Server (NTRS)

    Rauch, G.; Stanford, M.; Holden, S. A.; Stern, B. P.; Rosati, D.; Lombardi, P.; Humphrey, M.; Villar-Martin, A.; Hook, M.; Fosbury, R. N.; Squires, R. A. E.

    2003-01-01

    The Lynx arc, with a redshift of 3.357, was discovered during spectroscopic follow-up of the z=0.570 cluster RX J0848+4456 from the ROSAT Deep Cluster Survey. The arc is characterized by a very red R - K color and strong, narrow emission lines.

  1. Making It Their Own: Severn Ojibwe Communicative Practices. Anthropological Horizons.

    ERIC Educational Resources Information Center

    Valentine, Lisa Philips

    Using a discourse-centered approach to ethnography, this book provides an empirically based, contemporary overview of a rapidly changing First Nations village in northern Ontario (Canada). Data were collected in the 1980s during a 2-year residence and follow-up visits in the Severn Ojibwa community of Lynx Lake, a remote subarctic village in which…

  2. Design Issues in a Hypertext-Based Information System for Bibliographic Retrieval.

    ERIC Educational Resources Information Center

    Dimitroff, Alexandra; Wolfram, Dietmar

    1993-01-01

    Describes initial design considerations and implementation issues for a hypertext retrieval system for structured bibliographic data. Previous research on information retrieval and hypertext is reviewed; HyperLynx, a hypertext prototype information retrieval system that emphasized ease of use and browsing capabilities, is explained; and further…

  3. How a Picture Book Happens.

    ERIC Educational Resources Information Center

    Bonners, Susan

    1994-01-01

    The author and illustrator of a picture book about the life cycle of the lynx describes the research and development process she used to create the book. Contacts with wildlife biologists, presenting the predator/prey relationship, creating pictures and text, drawing from life, and creating the book jacket are among the topics covered. (KRN)

  4. Ice coring on Vestfonna Ice Cap Contact person: John Moore (jmoore@ulapland.fi).

    E-print Network

    Moore, John

    (professional Canadian driller) (lynx@polarcom.com) Other Kinnvika expedition members part time associated fields of Antarctica and Greenland have not received much attention, partly because of surface melting expeditions have shown a potential to extract high-resolution climate records from Vestfonna. The 350 m thick

  5. Visualizing Semantic Graphs A semantic graph is a network of heterogeneous nodes and links annotated with a

    E-print Network

    , Green- Sketch, our second component, provides a graphical interface for users to query graphs this metadata interactively. GreenLynx analyzes mobile device communications, which include phone calls, text messages, and other contact information. #12;September 2012 PNWD-SA-10035 GreenMonster is another Have

  6. POPULATION TRENDS IN FURBEARERS IN NEBRASKA

    Microsoft Academic Search

    L. M. Landholt; Hugh H. Genoways

    2000-01-01

    Population trends are documented from 1941 to 1997 for the 12 species of furbearing mammals harvested in Nebraska. Populations of red fox (Vulpes vulpes, raccoon (Procyon lotor), beaver (Castor canadensis), coyote (Canis lupus), and bobcat (Lynx rufus) have increased during this period. Populations of muskrat (Ondatra zibethicus), mink (Mustela vison), eastern spotted skunk (Spilogale putorius), long-tailed weasel (Mustela frenata), and

  7. Forest Grouse and Ptarmigan KATHY MARTIN, CATHY DOYLE, SUSAN HANNON, & FRITZ MUELLER

    E-print Network

    Krebs, Charles J.

    of grouse. Two species, spruce grouse (Falcipennis canadensis) and ruffed grouse (Bonasa umbellus), inhabit-ranging predators (goshawk, golden eagle, harrier, coyote, lynx, fox, wolverine, wolf) hunt in both forest chick) for F canadensis populations ranges from 40% to 81% in southern Canada and the northern United

  8. 2001-2003 MPI Software Technology, Inc.. MPI Software Technology, Inc.

    E-print Network

    Kepner, Jeremy

    .. MSTI's Strategy · Core+ G4 / Altivec · Core P4 / SSE · CoreLite TI DSP C67 family · VxWorks, MercuryOS, LynxOS, Linux, MacOSX · Windows, Linux, VxWorks · Code Composer toolset Availability on Different4 · Full Core profile support for Windows, Linux, and VxWorks. · Optimized FFT performance for SSE

  9. Montana Manufacturing Center www.mtmanufacturingcenter.com

    E-print Network

    Dyer, Bill

    Center (MMEC) has helped the company achieve the quality system and certification for medical devices the equipment but as a research, not medical, device. He envisions that the Digital Lynx® and Cheetah® Data ForwardFocus Innovation Meets Standardization: Neuralynx Pursuing the Medical Device Market 4-5 Special

  10. Managing and restoring carnivore populations is one of the most challenging ecological and sociological problems facing wildlife managers today. People often

    E-print Network

    Clark, William R.

    of interest by the Iowa Department of Natural Resources (DNR) is the bobcat (Lynx rufus), which has become the century after settlement. Bobcats range from southern Canada into central Mexico, but until recently have be documented and conservation options could be defined. Objectives We are focusing on determining

  11. UNIVERSIT DU QUBEC MONTRAL vARlABILIT DE LA TEMPRATURE DE SURFACE

    E-print Network

    moraux ni à [ses] droits de propriété intellectuelle. Sauf entente contraire, [l'auteur] conserve la Vernal qui a su me donner ma chance quand je suis arrivée au Canada en m'accueillant dans son laboratoire et le 210Pb et Linda Genovesi "OEil de Lynx" pour la lecture finale. Finalement, un merci tout

  12. Jeffrey R. Row Environment and Resource Studies, University of Waterloo, Waterloo, Ontario, Canada, N2L 3G1

    E-print Network

    Row, Jeffrey R.

    of The Canada Lynx across its range in North America. 2006 Independent Research Contract - Environment Canada and conservation of ecotherms in Canada. Vertabrate Di- versity, Queen's Univeristy, Kingston, Ontario. 2008Jeffrey R. Row Environment and Resource Studies, University of Waterloo, Waterloo, Ontario, Canada

  13. Wolves as a Symbol of People's Willingness to Pay for Large Carnivore Conservation

    Microsoft Academic Search

    Göran Ericsson; Göran Bostedt; Jonas Kindberg

    2008-01-01

    A successful implementation of a mammalian conservation policy requires knowledge of how people value animals. Little is known about how people value large carnivores. The discussion is therefore dominated by people's perception of wolves. In a mail survey (65% response rate) we asked persons residing in areas with populations of wolves, bears, lynx, and wolverines whether they were willing to

  14. Est-ce que la chasse l'ours noir est viable comme mthode de gestion

    E-print Network

    Blouin-Demers, Gabriel

    de prédateurs naturels et de compétition interspécifique ­ Loups ­ Chats sauvages (cougar, lynx) · Efforts de conservation antécédents #12;Figure 3. Comparison of Huggins closed population models of abundance for black bears in the Bow Valley of Banff National Park, Alberta, Canada. Estimates for black

  15. An Integrated Study of Ecosystem Processes B-Bar Ranch,Montana

    E-print Network

    Dyer, Bill

    cycling and weeds 6. Houndstongue and Canada Thistle mapping 7. Irrigation and water use efficiency 8's holistic management practices critical to conservation efforts in Montana.The environmentally conscious,bighorn sheep, mountain lion,lynx,porcupine,badger,beaver,coyote,marmot,fish and bird species. Besides

  16. Kootenai Tribe of Idaho Fi h d Wildlif PFish and Wildlife Program

    E-print Network

    THREATENED Burbot PETITIONED West Slope Cutthroat PETITIONED Woodland Caribou ENDANGERED Canada Lynx and Conservation Council April 2013 Meeting, Spokane, WA Kootenai River Subbasin · 9 million acres · 2 Countries (Endangered Species Act), and KVRI Initiatives i.e., Burbot Conservation Strategy MOU and Wetland &, gy M

  17. Habitat Fragmentation and Interspecific

    E-print Network

    83 Chapter 4 Habitat Fragmentation and Interspecific Competition: Implications for Lynx Conservation Steven W. Buskirk, Department of Zoology and Physiology, University of Wyoming, P.O. Box 3166 Blvd., Vancouver, BC V6T 1Z4 Canada Abstract--Habitat fragmentation and interspecific competition

  18. Ecology, 89(9), 2008, pp. 24162425 2008 by the Ecological Society of America

    E-print Network

    Orrock, John

    Canada 3 Department of Biology, University of Texas, Austin, Texas 78705 USA 4 Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6 Canada 5 Gulf of Maine Research) measured on an ecological time scale. Our review revealed that NCE were integral to explaining lynx

  19. ECOPHYSIOLOGY Yoram Yom-Tov Eli Geffen

    E-print Network

    Yom-Tov, Yoram

    . It states that, ``In warm blooded ani- mals, races from warm regions are smaller than races from cold among North America bobcats (Lynx rufus) and found that James' modifica- tion of Bergmann's rule has a statistically more sig- nificant influence on wing and skull size of the bat Eptesicus fuscus

  20. Developing biological resource banks as a supporting tool for wildlife reproduction and conservation

    Microsoft Academic Search

    Trinidad Leon-Quinto; Miguel A. Simon; Rafael Cadenas; Jonathan Jones; Francisco J. Martinez-Hernandez; Juan M. Moreno; Astrid Vargas; Fernando Martinez; Bernat Soria

    2009-01-01

    This work presents a Biological Resource Bank generated as a complementary supporting tool for the reproduction and the in situ and ex situ conservation of the Iberian lynx. In its design we prioritized the preservation of a maximum of the current genetic and biological diversity of the population, and the harmless collection of the samples. To provide future reproductive opportunities

  1. Appearance of the first cemental annulation of permanent incisor teeth of the domestic cat (Felis catus)

    E-print Network

    Choi, In-Back

    1983-01-01

    Common Marmoset 5 ecies Alces alces Odocoileus hemiomus dd t liens ~i Curvus ~e1a hus Ursus americanus ~se hales h h f Canis latrans Ovis aries ~nti le Odocoileus hemionus Ovis dalli Lynx rufus ~Vul es fulva ~nil t d e lands Ovss...

  2. TERRI THORN, Wildlife Biologist

    Microsoft Academic Search

    B. S. South; Oak Hammock Marsh

    SPECIALTY AREAS Wildlife Biologist: Major duties included data creation, acquisition, maintenance, and manipulation. Provided both biological and GIS expertise in the designation of critical habitat for Canada lynx, breeding piping plovers, Preble's meadow jumping mouse, and the Colorado butterfly plants. Worked with all types of spatial data including satellite and aerial imagery, videography, vector and rastor data. Other duties have

  3. A sex difference in the behavioural response of nesting mountain bluebirds ( Sialia currucoides ) to a mounted predator

    Microsoft Academic Search

    K. W. Gibson; A. Moehrenschlager

    2008-01-01

    Passerine nests can benefit parental fitness, but defense against predators may be costly. Although this paradigm is well\\u000a studied, no studies have been conducted on mountain bluebirds (Sialia currucoides). We observed the response of 17 bluebird pairs with nestlings to a mounted bobcat (Lynx rufus) and two controls. Bluebird pairs clearly differentiated the mounted predator and males moved closer to

  4. Prey switching as a means of enhancing persistence in predators at the trailing southern edge.

    PubMed

    Peers, Michael J L; Wehtje, Morgan; Thornton, Daniel H; Murray, Dennis L

    2014-04-01

    Understanding the effects of climate change on species' persistence is a major research interest; however, most studies have focused on responses at the northern or expanding range edge. There is a pressing need to explain how species can persist at their southern range when changing biotic interactions will influence species occurrence. For predators, variation in distribution of primary prey owing to climate change will lead to mismatched distribution and local extinction, unless their diet is altered to more extensively include alternate prey. We assessed whether addition of prey information in climate projections restricted projected habitat of a specialist predator, Canada lynx (Lynx canadensis), and if switching from their primary prey (snowshoe hare; Lepus americanus) to an alternate prey (red squirrel; Tamiasciurus hudsonicus) mitigates range restriction along the southern range edge. Our models projected distributions of each species to 2050 and 2080 to then refine predictions for southern lynx on the basis of varying combinations of prey availability. We found that models that incorporated information on prey substantially reduced the total predicted southern range of lynx in both 2050 and 2080. However, models that emphasized red squirrel as the primary species had 7-24% lower southern range loss than the corresponding snowshoe hare model. These results illustrate that (i) persistence at the southern range may require species to exploit higher portions of alternate food; (ii) selection may act on marginal populations to accommodate phenotypic changes that will allow increased use of alternate resources; and (iii) climate projections based solely on abiotic data can underestimate the severity of future range restriction. In the case of Canada lynx, our results indicate that the southern range likely will be characterized by locally varying levels of mismatch with prey such that the extent of range recession or local adaptation may appear as a geographical mosaic. PMID:24353147

  5. Habitat differentiation within the large-carnivore community of Norway's multiple-use landscapes

    PubMed Central

    May, Roel; van Dijk, Jiska; Wabakken, Petter; Swenson, Jon E; Linnell, John DC; Zimmermann, Barbara; Odden, John; Pedersen, Hans C; Andersen, Reidar; Landa, Arild

    2008-01-01

    The re-establishment of large carnivores in Norway has led to increased conflicts and the adoption of regional zoning for these predators. When planning the future distribution of large carnivores, it is important to consider details of their potential habitat tolerances and strength of inter-specific differentiation. We studied differentiation in habitat and kill sites within the large-carnivore community of south-eastern Norway. We compared habitat selection of the brown bear Ursus arctos L., Eurasian lynx Lynx lynx L., wolf Canis lupus L. and wolverine Gulo gulo L., based on radio-tracking data. Differences in kill site locations were explored using locations of documented predator-killed sheep Ovis aries L. We modelled each species’ selection for, and differentiation in, habitat and kill sites on a landscape scale using resource selection functions and multinomial logistic regression. Based on projected probability of occurrence maps, we estimated continuous patches of habitat within the study area. Although bears, lynx, wolves and wolverines had overlapping distributions, we found a clear differentiation for all four species in both habitat and kill sites. The presence of bears, wolves and lynx was generally associated with rugged, forested areas at lower elevations, whereas wolverines selected rugged terrain at higher elevations. Some degree of sympatry was possible in over 40% of the study area, although only 1·5% could hold all four large carnivores together. Synthesis and applications. A geographically differentiated management policy has been adopted in Norway, aimed at conserving viable populations of large carnivores while minimizing the potential for conflicts. Sympatry of all four carnivores will be most successful if regional zones are established of adequate size spanning an elevational gradient. High prey densities, low carnivore densities, low dietary overlap and scavenging opportunities have most probably led to reduced competitive exclusion. Although regional sympatry enhances the conservation of an intact guild of large carnivores, it may well increase conflict levels and resistance to carnivore conservation locally. PMID:19330031

  6. Nebular and stellar properties of a metal-poor HII galaxy at z= 3.36

    NASA Astrophysics Data System (ADS)

    Villar-Martín, M.; Cerviño, M.; González Delgado, R. M.

    2004-12-01

    We have characterized the physical properties (electron temperature, density and metallicity) of the ionized gas and the ionizing population (age, metallicity and presence of Wolf-Rayet stars) in the Lynx arc, an HII galaxy at z= 3.36. The ultraviolet doublets (i.e. CIII], SiIII] and NIV) imply the existence of a density gradient in this object, with a high-density region (0.1-1.0 × 105cm-3) and a lower density region (<3200cm-3). The temperature-sensitive ratio [OIII]??1661,1666/?5007 implies an electron temperature Te= 17300+500-700 K, in agreement within the errors with photoionization model predictions. Nebular abundance determination using standard techniques and the results from photoionization models imply a nebular metallicity of O/H ~ 10 +/- 3percent (O/H)solar, in good agreement with recent results from Fosbury et al. Both methods suggest that nitrogen is overabundant relative to other elements, with [N/O]~ 2.0-3.0 ×[N/O]solar. We do not find evidence for Si overabundance, as Fosbury et al. did. Photoionization models imply that the ionizing stellar population in the Lynx arc has an age of <~5 Myr. If He+ is ionized by Wolf-Rayet (WR) stars, then the ionizing stars in the Lynx arc have metallicities Zstar > 5percent Zsolar and ages ~2.8-3.4 Myr (depending on Zstar), when WR stars appear and are responsible for the He2+ emission. However, alternative excitation mechanisms for this species are not discarded. Since the emission lines trace the properties of the present burst only, nothing can be said about the possible presence of an underlying old stellar population. The Lynx arc is a low-metallicity HII galaxy that is undergoing a burst of star formation of <~5 Myr age. One possible scenario that explains the emission-line spectrum of the Lynx arc, the large strength of the nitrogen lines and the He2+ emission is that the object has experienced a merger event that has triggered a burst of star formation. WR stars have formed that contribute to a fast enrichment of the interstellar medium. Like Fosbury et al., we find a factor of >~10 discrepancy between the mass of the instantaneous burst required to power the luminosity of the H? line and the mass implied by the continuum level measured for the Lynx arc. We discuss several possible solutions to this problem. The most likely explanation is that gas and stars have different spatial distributions, so that the emission lines and the stellar continuum suffer different gravitational amplifications by the intervening cluster.

  7. Suborbital Reusable Launch Vehicles as an Opportunity to Consolidate and Calibrate Ground Based and Satellite Instruments

    NASA Astrophysics Data System (ADS)

    Papadopoulos, K.

    2014-12-01

    XCOR Aerospace, a commercial space company, is planning to provide frequent, low cost access to near-Earth space on the Lynx suborbital Reusable Launch Vehicle (sRLV). Measurements in the external vacuum environment can be made and can launch from most runways on a limited lead time. Lynx can operate as a platform to perform suborbital in situ measurements and remote sensing to supplement models and simulations with new data points. These measurements can serve as a quantitative link to existing instruments and be used as a basis to calibrate detectors on spacecraft. Easier access to suborbital data can improve the longevity and cohesiveness of spacecraft and ground-based resources. A study of how these measurements can be made on Lynx sRLV will be presented. At the boundary between terrestrial and space weather, measurements from instruments on Lynx can help develop algorithms to optimize the consolidation of ground and satellite based data as well as assimilate global models with new data points. For example, current tides and the equatorial electrojet, essential to understanding the Thermosphere-Ionosphere system, can be measured in situ frequently and on short notice. Furthermore, a negative-ion spectrometer and a Faraday cup, can take measurements of the D-region ion composition. A differential GPS receiver can infer the spatial gradient of ionospheric electron density. Instruments and optics on spacecraft degrade over time, leading to calibration drift. Lynx can be a cost effective platform for deploying a reference instrument to calibrate satellites with a frequent and fast turnaround and a successful return of the instrument. A calibrated reference instrument on Lynx can make collocated observations as another instrument and corrections are made for the latter, thus ensuring data consistency and mission longevity. Aboard a sRLV, atmospheric conditions that distort remotely sensed data (ground and spacecraft based) can be measured in situ. Moreover, an active instrument can be deployed in a sRLV under a satellite track, and serve as a "standard candle" for instruments on satellites. Yearly calibrations of the Solar Extreme Ultraviolet Experiment (SEE) instrument aboard the TIMED orbiter using sounding rockets depict the necessity of calibrations and illustrates calibration frequency.

  8. Interspecies transmission of Cytauxzoon felis.

    PubMed

    Kier, A B; Wightman, S R; Wagner, J E

    1982-01-01

    The causative agent of feline cytauxzoonosis was experimentally inoculated into 4 species of domestic farm animals, 9 species of laboratory animals, and 17 wildlife species. The inoculum consisted of freshly collected or deep-frozen blood and/or tissue homogenates from domestic cats euthanatized in extremis with experimentally transmitted feline cytauxzoonosis. A bobcat, Lynx rufus floridanus (Florida bobcat), developed cytauxzoonosis typical of the disease observed in domestic cats and died of the disease 2 weeks after inoculation. A persistent parasitemia, but no overt signs of illness, developed in another bobcat, Lynx rufus rufus (eastern bobcat). The sheep developed a low persistent parasitemia, but no clinical signs of illness. There was no clear evidence of cytauxzoonosis demonstrated by necropsy or histopathologic or blood smear examinations in all other species. Additionally, freshly collected blood and/or tissue homogenates from animals of various species, except bobcats, failed to produce evidence of cytauxzoonosis when subinoculated into domestic cats. PMID:6807139

  9. [Felines: an alternative in genetic toxicology studies?].

    PubMed

    Zamora-Perez, Ana; Gómez-Meda, Belinda C; Ramos-Ibarra, Maria L; Batista-González, Cecilia M; Luna-Aguirre, Jaime; González-Rodríguez, Andrés; Rodríguez-Avila, José L; Zúñiga-González, Guillermo M

    2008-06-01

    The micronuclei (MN) test carry out in peripheral blood is fast, simple, economic and it is used to detect genotoxic environmental agents. MN are fragments of chromosomes or complete chromosomes remaining in the cytoplasm after cell division, which increase when organisms are exposed to genotoxic agents. Therefore, species with the highest values of spontaneous micronucleated erythrocytes (MNE) are the most suitable to be potentials biomonitor of micronucleogenic agents, using a drop of blood. Nine species of Felines that present spontaneous MNE in peripheral blood are shown. From these species, the cat has been previously proven, with positive results and also lion (Panthera leo), yaguaroundi (Felis yagoaroundi), lynx (Lynx ruffus), jaguar (Panthera onca), puma (Puma concolor), tiger (Panthera tigris), ocelote (Felis padalis) and leopard (Panthera pardus) display spontaneous MNE, and with this characteristic this Family can be propose like a potential group to be used in toxicogenetic studies. PMID:19256458

  10. Effects of fecal age and seasonality on steroid hormone concentration as a reproductive parameter in field studies

    Microsoft Academic Search

    Teresa Abáigar; Miguel A. Domené; Francisco Palomares

    2010-01-01

    We studied how fecal age (6, 12, 24, 48, 72, and 168 h) and seasonality affect variation in the fecal steroid hormone metabolite\\u000a concentration in three endangered mammalian species, Mhorr gazelle, Saharan Barbary sheep, and the Iberian lynx. Except for\\u000a estrogens, concentrations remained stable for at least 48 h in the Mhorr gazelle and the Saharan Barbary sheep. Steroid hormone\\u000a metabolite concentration

  11. Estimating Bobcat Abundance Using Automatically Triggered Cameras

    Microsoft Academic Search

    RICHARD D. HEILBRUN; NOVA J. SILVY; MARKUS J. PETERSON; MICHAEL E. TEWES

    2006-01-01

    Ineffective survey methods of carnivores limit the ability of managers and researchers to make sound research conclusions and management recommendations. Because bobcats (Lynx rufus) are individually identifiable due to their unique coat patterns, it may be possible to obtain density estimates using capture-recapture models. We photo-trapped bobcats on the 3,156-ha Welder Wildlife Foundation Refuge in southern Texas from September 2000

  12. RELATIONSHIPS BETWEEN PREDATOR REMOVAL AND WHITE-TAILED DEER NET PRODUCTIVITY1

    Microsoft Academic Search

    SAMUEL L. BEASOM

    This study was conducted to determine the impact of predation on productivity of white- tailed deer (Odocoileus virginianus) in South Texas by removing predators from one area and compar- ing the results to a control area. A total of 188 coyotes (Canis latrans) and 120 bobcats (Lynx rufus) were removed during predator removal efforts on the approximately 5,400-acre (2,186-ha) experimental

  13. SPACE-USE PATTERNS OF BOBCATS RELATIVE TO SUPPLEMENTAL FEEDING OF NORTHERN BOBWHITES

    Microsoft Academic Search

    IVY A. GODBOIS; L. MIKE CONNER; ROBERT J. WARREN; Gehrt

    2004-01-01

    Abstract: In the southeastern United States, supplemental feeding of northern bobwhites (Colinus virginianus) is a common,management,practice. To determine,whether,bobcats (Lynx rufus) are attracted to supplemental,food provided to northern bobwhites and whether this food affects bobcat home-range size, we radiomarked bobcats and assessed space use relative to supplemental feeding. Wefound,little evidence to suggest that bobcat home-range,sizes were affected by the supplemental food,

  14. Excystation of Isospora arctopitheci Rodhain, 1933 with notes on a similar process in Isospora bigemina (Stiles, 1891) Lühe, 1906

    Microsoft Academic Search

    Donald W. Duszynski; Clarence A. Speer

    1976-01-01

    Summary The in vitro excystation process of sporozoites of Isospora arctopitheci Rodhain, 1933 from the titi marmoset Saguinus geoffroyi and of Isospora bigemina (Stiles, 1891) Lühe, 1906 from the bobcat, Lynx rufus is presented. Sporocysts of both species lack a Stieda body and when exposed to a trypsin-sodium taurocholate (pH 7.4) excysting fluid the walls of both collapse in a

  15. Food habits and space use of gray foxes in relation to sympatric coyotes and bobcats

    Microsoft Academic Search

    Jennifer C. C. Neale; Benjamin N. Sacks

    2001-01-01

    Abstract: To investigate interspecific relationships between,gray foxes ( Urocyon,cinereoargenteus) and sympatric,coy- otes (Canis latrans) and bobcats (Lynx rufus), we quantified occurrence of food items in carnivore scats and used rela- tive abundances,of scats on transects to assess space use. Dietary-overlap indices between,the two canid species were high during summer and fall (x = 0.89) when fruits were prevalent in scats

  16. Effects of a highway and mitigation projects on bobcats in Southern Texas

    Microsoft Academic Search

    A. T Cain; V. R Tuovila; D. G Hewitt; M. E Tewes

    2003-01-01

    Roads are a common landscape feature that may negatively impact wildlife. These impacts may be reduced by altering roads and their right-of-ways. We studied impacts of a 4-lane divided highway on bobcats (Lynx rufus) in southern Texas. From June 1997 to May 1999, 25 bobcats were found dead on the 32.2 km section of highway we studied. Mortalities were more

  17. PREDATOR URINES AS CHEMICAL BARRIERS TO WHITE-TAILED DEER

    Microsoft Academic Search

    Jerrold L. Belant; Thomas W. Seamans; Laura A. Tyson

    1998-01-01

    The authors assessed whether bobcat (Lynx rufus) or coyote (Canis latrans) urine could reduce white-tailed deer (Odocoileus virginianus) use of established feeding areas or trails. A four-week experiment evaluating deer use of eight feeding stations, four each with coyote or bobcat urine was conducted at a 2,200 ha fenced facility in northern Ohio with high deer densities (38\\/km2). At this

  18. Basic haematological values in carnivores--II. The Felidae.

    PubMed

    Pospísil, J; Kase, F; Váhala, J

    1987-01-01

    1. Basic haematological values in 34 animals of eight carnivorous species are reported. 2. In four Northern lynxs (Lynx lynx lynx), two male and two female animals, the mean values are given: erythrocyte counts 8.51 X 10(12)/l, haematocrit 0.392/l, haemoglobin content 148.0 g/l and leukocyte count 7.92 X 10(9)/l. 3. In six male pumas (Puma concolor missolensis) the mean values estimated are: erythrocyte count 9.35 X 10(12)/l, haematocrit 0.43/l, haemoglobin content 163.9 g/l and leukocyte count 7.73 X 10(9)/l. Individual values in one female puma are also given. 4. In six jaguars (Panthera onca), three male and three female animals, the mean values are given: erythrocyte count 8.27 X 10(12)/l, haematocrit 0.37/l, haemoglobin content 137.1 g/l and leukocyte count 15.15 X 10(9)/l. 5. Only individual values are reported in one clouded leopard (Neofelis nebulosa), in one leopard (Panthera pardus saxicolor), in one Corbett's tiger (Panthera tigris Corbetti) and in one Altaic tiger (Panthera tigris Altaica). 6. In four lions (Panthera leo leo), two male and two female animals, the mean estimated values are: erythrocyte count 10.14 X 10(12)/l, haematocrit 0.462/l, haemoglobin content 159.0 g/l and leukocyte count 11.05 X 10(9)/l. In six female cheetahs (Acinonox jubatus jubatus) the mean values estimated are: erythrocyte count 7.86 X 10(12)/l, haematocrit 0.373/l, haemoglobin content 142.8 g/l and leukocyte count 8.65 X 10(9)/l. For three male cheetahs only individual values are reported. 8. All results achieved are compared with those abstracted from the literature and discussed. PMID:2886279

  19. Geological characteristics of high-level subvolcanic porphyritic intrusions associated with the Wolverine Zn-Pb-Cu volcanic-hosted massive sulphide deposit, Finlayson Lake District, Yukon, Canada 1

    Microsoft Academic Search

    Stephen J. Piercey; Jan M. Peter; Geoffrey D. Bradshaw; Terry Tucker; Suzanne Paradis

    During the 2000 field season, a project was initiated to study the geology, geochemistry and alteration characteristics of high-level subvolcanic porphyritic intrusions associated with the Wolverine volcanic-hosted massive sulphide deposit in the Finlayson Lake district, Yukon. Subvolcanic porphyritic intrusions within the Wolverine deposit are located approximately 10-20 m beneath exhalative sulphide bodies or iron-formation in four zones (Wolverine\\/Lynx, Fisher, Sable

  20. The role of predation and food limitation on claims for compensation, reindeer demography and population dynamics

    PubMed Central

    Tveraa, Torkild; Stien, Audun; Brøseth, Henrik; Yoccoz, Nigel G

    2014-01-01

    A major challenge in biodiversity conservation is to facilitate viable populations of large apex predators in ecosystems where they were recently driven to ecological extinction due to resource conflict with humans. Monetary compensation for losses of livestock due to predation is currently a key instrument to encourage human–carnivore coexistence. However, a lack of quantitative estimates of livestock losses due to predation leads to disagreement over the practice of compensation payments. This disagreement sustains the human–carnivore conflict. The level of depredation on year-round, free-ranging, semi-domestic reindeer by large carnivores in Fennoscandia has been widely debated over several decades. In Norway, the reindeer herders claim that lynx and wolverine cause losses of tens of thousands of animals annually and cause negative population growth in herds. Conversely, previous research has suggested that monetary predator compensation can result in positive population growth in the husbandry, with cascading negative effects of high grazer densities on the biodiversity in tundra ecosystems. We utilized a long-term, large-scale data set to estimate the relative importance of lynx and wolverine predation and density-dependent and climatic food limitation on claims for losses, recruitment and population growth rates in Norwegian reindeer husbandry. Claims of losses increased with increasing predator densities, but with no detectable effect on population growth rates. Density-dependent and climatic effects on claims of losses, recruitment and population growth rates were much stronger than the effects of variation in lynx and wolverine densities. Synthesis and applications. Our analysis provides a quantitative basis for predator compensation and estimation of the costs of reintroducing lynx and wolverine in areas with free-ranging semi-domestic reindeer. We outline a potential path for conflict management which involves adaptive monitoring programmes, open access to data, herder involvement and development of management strategy evaluation (MSE) models to disentangle complex responses including multiple stakeholders and individual harvester decisions. PMID:25558085

  1. The new data acquisition system at GSI

    Microsoft Academic Search

    H. G. Essel; J. Hoffmann; N. Kurz; R. S. Mayer; W. Ott; D. Schall

    1996-01-01

    The new general purpose data acquisition system developed at GSI is currently installed at about 30 experiments at GSI and other sites. It is based on the LynxOS operating system. Several CPUs, i.e. GSI developed CAMAC computer boards, VME processor boards, and Aleph Event Builders, are connected by a memory mapped bus, i.e. a VSB or VME bus. It can

  2. New Platforms for Suborbital Astronomical Observations and In Situ Atmospheric Measurements: Spacecraft, Instruments, and Facilities

    NASA Astrophysics Data System (ADS)

    Rodway, K.; DeForest, C. E.; Diller, J.; Vilas, F.; Sollitt, L. S.; Reyes, M. F.; Filo, A. S.; Anderson, E.

    2014-12-01

    Suborbital astronomical observations have over 50 years' history using NASA's sounding rockets and experimental space planes. The new commercial space industry is developing suborbital reusable launch vehicles (sRLV's) to provide low-cost, flexible, and frequent access to space at ~100 km altitude. In the case of XCOR Aerospace's Lynx spacecraft, the vehicle design and capabilities work well for hosting specially designed experiments that can be flown with a human-tended researcher or alone with the pilot on a customized mission. Some of the first-generation instruments and facilities that will conduct solar observations on dedicated Lynx science missions include the SwRI Solar Instrument Pointing Platform (SSIPP) and Atsa Suborbital Observatory, as well as KickSat sprites, which are picosatellites for in situ atmospheric and solar phenomena measurements. The SSIPP is a demonstration two-stage pointed solar observatory that operates inside the Lynx cockpit. The coarse pointing stage includes the pilot in the feedback loop, and the fine stage stabilizes the solar image to achieve arcsecond class pointing. SSIPP is a stepping-stone to future external instruments that can operate with larger apertures and shorter wavelengths in the solar atmosphere. The Planetary Science Institute's Atsa Suborbital Observatory combines the strengths of ground-based observatories and space-based observing to create a facility where a telescope is maintained and used interchangeably with either in-house facility instruments or user-provided instruments. The Atsa prototype is a proof of concept, hand-guided camera that mounts on the interior of the Lynx cockpit to test target acquisition and tracking for human-operated suborbital astronomy. KickSat sprites are mass-producible, one inch printed circuit boards (PCBs) populated by programmable off the shelf microprocessors and radios for real time data transmission. The sprite PCBs can integrate chip-based radiometers, magnetometers, accelerometers, etc. This low-cost, customizable platform provides researchers the ability to design immediately responsive, repeatable, high resolution experiments.

  3. Use of object-oriented techniques in a beam-line control system

    SciTech Connect

    Myers, D.R.; Rueden, W. von [ECP Division, Geneva (Switzerland); Butler, H. [Los Alamos, NM (United States); Yang, J. [Univ. of Science and Technology, Hefei (China)

    1994-12-31

    The authors describe the use of object-oriented programming in the control and data-acquisition system for the upgraded CERN neutrino beam-line. C++ in conjunction with Posix threads running under Lynx-OS have been used in several front-end PCs. These communicate using Remote Procedure Calls over ethernet with a workstation running the commercial supervisory package, FactoryLink.

  4. Effectiveness of Scat Detection Dogs for Detecting Forest Carnivores

    Microsoft Academic Search

    ROBERT A. LONG; THERESE M. DONOVAN; PAULA MACKAY; WILLIAM J. ZIELINSKI; JEFFREY S. BUZAS

    2007-01-01

    ABSTRACT We assessed the detection and accuracy rates of detection dogs trained to locate scats from free-ranging black bears (Ursus americanus), fishers (Martes pennanti), and bobcats (Lynx rufus). During the summers of 2003–2004, 5 detection teams located 1,565 scats (747 putative black bear, 665 putative fisher, and 153 putative bobcat) at 168 survey sites throughout Vermont, USA. Of 347 scats

  5. Sarcocystis and other coccidia in foxes and other wild carnivores from Montana.

    PubMed

    Dubey, J P

    1982-12-01

    Sarcocystis spp sporocysts were found in feces of 10.1% of 198 red foxes (Vulpes vulpes), in 3.2% of 61 bobcats (Lynx rufus), in 16.6% of 12 mountain lions (Felis concolor), in 16.6% of 6 fisher (Martes pennanti), and in none of 20 wolverines (Gulo gulo), 4 mink (Mustela vison), or 10 raccoons (Procyon lotor). Sarcocystis muris and Toxoplasma gondii were not found in laboratory mice inoculated with feces of bobcats and mountain lions. PMID:6816776

  6. Predicting carnivore occurrence with noninvasive surveys and occupancy modeling

    Microsoft Academic Search

    Robert A. LongTherese; Therese M. Donovan; Paula MacKay; William J. Zielinski; Jeffrey S. Buzas

    2011-01-01

    Terrestrial carnivores typically have large home ranges and exist at low population densities, thus presenting challenges\\u000a to wildlife researchers. We employed multiple, noninvasive survey methods—scat detection dogs, remote cameras, and hair snares—to\\u000a collect detection–nondetection data for elusive American black bears (Ursus americanus), fishers (Martes pennanti), and bobcats (Lynx rufus) throughout the rugged Vermont landscape. We analyzed these data using occupancy

  7. Effectiveness of Scat Detection Dogs for Detecting Forest

    Microsoft Academic Search

    Carnivores ROBERT A. LONG; THERESE M. DONOVAN; PAULA MACKAY; WILLIAM J. ZIELINSKI; JEFFREY S. BUZAS

    We assessed the detection and accuracy rates of detection dogs trained to locate scats from free-ranging black bears (Ursus americanus), fishers (Martes pennanti), and bobcats (Lynx rufus). During the summers of 2003-2004, 5 detection teams located 1,565 scats (747 putative black bear, 665 putative fisher, and 153 putative bobcat) at 168 survey sites throughout Vermont, USA. Of 347 scats genetically

  8. Gastric spiral bacteria in small felids.

    PubMed

    Kinsel, M J; Kovarik, P; Murnane, R D

    1998-06-01

    Nine small cats, including one bobcat (Felis rufus), one Pallas cat (F. manul), one Canada lynx (F. lynx canadensis), two fishing cats (F. viverrina), two margays (F. wiedii), and two sand cats (F. margarita), necropsied between June 1995 and March 1997 had large numbers of gastric spiral bacteria, whereas five large cats, including one African lion (Panthera leo), two snow leopards (P. uncia), one Siberian tiger (P. tigris altaica), and one jaguar (P. onca), necropsied during the same period had none. All of the spiral organisms from the nine small cats were histologically and ultrastructurally similar. Histologically, the spiral bacteria were 5-14 microm long with five to nine coils per organism and were located both extracellularly within gastric glands and surface mucus, and intracellularly in parietal cells. Spiral bacteria in gastric mucosal scrapings from the Canada lynx, one fishing cat, and the two sand cats were gram negative and had corkscrewlike to tumbling motility when viewed with phase contrast microscopy. The bacteria were 0.5-0.7 microm wide, with a periodicity of 0.65-1.1 microm in all cats. Bipolar sheathed flagella were occasionally observed, and no periplasmic fibrils were seen. The bacteria were extracellular in parietal cell canaliculi and intracellular within parietal cells. Culture of mucosal scrapings from the Canada lynx and sand cats was unsuccessful. Based on morphology, motility, and cellular tropism, the bacteria were probably Helicobacter-like organisms. Although the two margays had moderate lymphoplasmacytic gastritis, the other cats lacked or had only mild gastric lymphoid infiltrates, suggesting that these organisms are either commensals or opportunistic pathogens. PMID:9732040

  9. Patch size effects on plant species decline in an experimentally fragmented landscape

    E-print Network

    Collins, Cathy Diane; Holt, Robert D.; Foster, Bryan L.

    2009-09-01

    cannabi- September 2009 2581FRAGMENTATION AND PLANT SPECIES DECLINES num, Solidago canadensis, Melilotus spp., Helianthus annuus, Aster praealtus) increased between the initial survey (1985) and 1995, but then showed substantial declines in 2000. For three... range of the Iberian Lynx. Ecography 25:314–328. Schoener, T. W. In press. The MacArthuer-Wilson equilibrium model: a chronicle of theoretical modification and real-world evaluation. In J. Losos and R. Ricklefs, editors. Island bio- geography at 40...

  10. Impact of acid mine-drainage from abandoned spoils on the chemistry of an intermittent stream in the arid Southwest

    Microsoft Academic Search

    Andrew J. Lampkin; Milton R. Sommerfeld

    1986-01-01

    Drainage from an orphaned copper mine (Sheldon Mine Complex) contributes highly mineralized, acidic waters to Lynx Creek, a small intermittent, arid-climate stream. This results in localized elevation of major cations, silica, sulfate, and heavy metals (Cu, Fe, Mn, Zn), depression in pH, and complete neutralization of bicarbonate alkalinity. Levels of chloride, nitrogen and phosphorus are unaffected by mine-drainage. During stable

  11. Measuring OS support for real-time CORBA ORBs

    Microsoft Academic Search

    David L. Levine; Sergio Flores-Gaitan; Christopher D. Gill; Douglas C. Schmidt

    1999-01-01

    The paper compares and evaluates the suitability of real time operating systems, VxWorks and LynxOS, and general purpose operating systems with real time extensions, Windows NT, Solaris, and Linux, for real time ORB middleware. While holding the hardware and ORB constant, we vary these operating systems and measure platform-specific variations in context switching overhead and priority inversions. Our findings illustrate

  12. 2.1 . . . . . . . . . . . . . . . . . . . . . 9 2.2 . . . . . . . . . . . . . . . . . . 10

    E-print Network

    Chiba, Shigeru

    3.2 OS . . . . . . . . . . . . . . . . . . 18 3.2.1 VxWorks.1 [8] [8, 7] #12;3 17 OS(MVS VMS UNIX MacOS Windows Linux ) OS OS VxWorks pSOS VRTX ITRON Windows CE Linux Linux Linux OS 3.2 OS OS OS [6] CPU #12;3 19 OS VxWorks ITRON LynxOS OS RT-Linux ART-Linux 3

  13. Exercise Session 1 Alessandro Abate

    E-print Network

    Abate, Alessandro

    for lynxes (l(t), t 0) and that of hares (h(t), t 0). Assume that the control Input b(u) (hare birth rate.haber@tudelft.nl Delft Center for Systems and Control, TU Delft September 9, 2010 ­ Ac.Yr. 2010/11, 1e Sem. Q1 ­ Exercise = Ax + Bu, y = Cx. Relate the new variable x with q. 2. Fix a control input u(t). What conditions

  14. Leptospirosis in wild and domestic carnivores in natural areas in Andalusia, Spain.

    PubMed

    Millán, Javier; Candela, Mónica G; López-Bao, José Vicente; Pereira, Marian; Jiménez, María Angeles; León-Vizcaíno, Luis

    2009-10-01

    Leptospirosis is a zoonosis that affects humans, domestic animals, and wildlife. Carnivores are at the top of the feeding chain, thus being exposed to pathogens through their preys. From June 2004 to April 2007, we analyzed for evidences of contact with 14 serovars of Leptospira interrogans Sensu Lato serum (analyzed by indirect Microscopic Agglutination Test) and urine or kidney samples (analyzed by microscopic observation, immunostaining and culture) collected from 201 wild and domestic carnivores, including 26 free-living Iberian lynx (Lynx pardinus), 33 red foxes (Vulpes vulpes), 33 Egyptian mongooses (Herpestes ichneumon), 25 common genets (Genetta genetta), two Eurasian badgers (Meles meles) and one Eurasian otter (Lutra lutra), and 53 free-roaming cats and 28 rural dogs in protected areas in Andalusia (southern Spain). Twenty-three percent of the animals presented evidences of contact, being the prevalence similar among wild (23.5%) and domestic species (22.2%). Contact with Lesptospira was detected in all the species but the otter. Prevalence was: lynx (11% by bacteriological detection, 32% by serology), fox (0%, 47%), mongoose (5%, 20%), genet (0%, 12%), badger (0%, 50%), cat (20%, 14%), dog (only serology: 36%). Serovar Icterohemorragiae accounted for 2/3 of the cases. Serovar Canicola was detected in half of the positive dogs and one lynx. Other serovars detected were Ballum, Sejroë, and Australis. No macroscopic lesions were observed in necropsied animals that showed evidence of contact with the agent, although histopathologic lesions (chiefly chronic interstitial nephritis) were observed in 7 out of the 11 microscopically analyzed individuals. Thus, L. interrogans may cause previously unrecorded disease in wild carnivores in Spain. Wild and free-roaming carnivores may not act as reservoir of L. interrogans but as a dead-end hosts, though the dog may act as reservoir of serovar Canicola. Carnivores are apparently good sentinels for the epidemiological monitorization of leptospirosis. PMID:18973450

  15. Hypertext vs Boolean-based Searching in a Bibliographic Database Environment: A Direct Comparison of Searcher Performance

    Microsoft Academic Search

    Dietmar Wolfram; Alexandra Dimitroff

    1998-01-01

    The purpose of this study is to carry out a direct comparison of a hypertext-based bibliographic retrieval system with a traditional Boolean-based retrieval system, each using the same database. Novice and experienced searchers were assigned to either a prototype hypertext system called HyperLynx or to a traditional Boolean system and were asked to perform a set of search tasks. The

  16. Real-time Operating System Timing Jitter and its Impact on Motor Control

    Microsoft Academic Search

    Frederick M. Proctor; William P. Shackleford

    General-purpose microprocessors are increasingly being used for control applications due to their widespread availability and software support for non-control functions like networking and operator interfaces. Two classes of real-time operating systems (RTOS) exist for these systems. The traditional RTOS serves as the sole operating system, and provides all OS services. Examples 1 include ETS, LynxOS, QNX, Windows CE and VxWorks.

  17. Open source real-time operating systems for plasma control at FTU

    Microsoft Academic Search

    C. Centioli; F. Iannone; G. Mazza; M. Panella; L. Pangione; V. Vitale; L. Zaccarian

    2004-01-01

    Nowadays, every tokamak has a plasma control system to monitor and drive discharge parameters like position, density, current, and shape. Several different solutions have been adopted to cope with the real-time constraints, ranging from the shared memory to the transputers technologies. At present, a VME\\/PPC604r embedded controller running a LynxOS operating system is used on Frascati Tokamak Upgrade (FTU) for

  18. Real-time operating system timing jitter and its impact on motor control

    Microsoft Academic Search

    Frederick M. Proctor; William P. Shackleford

    2001-01-01

    General-purpose microprocessors are increasingly being used for control applications due to their widespread availability and software support for non-control functions like networking and operator interfaces. Two classes of real-time operating systems (RTOS) exist for these systems. The traditional RTOS serves as the sole operating system, and provides all OS services. Examples include ETS, LynxOS, QNX, Windows CE and VxWorks. RTOS

  19. Chromosomal rearrangements and karyotype evolution in carnivores revealed by chromosome painting.

    PubMed

    Nie, W; Wang, J; Su, W; Wang, D; Tanomtong, A; Perelman, P L; Graphodatsky, A S; Yang, F

    2012-01-01

    Chromosomal evolution in carnivores has been revisited extensively using cross-species chromosome painting. Painting probes derived from flow-sorted chromosomes of the domestic dog, which has one of the most rearranged karyotypes in mammals and the highest dipoid number (2n=78) in carnivores, are a powerful tool in detecting both evolutionary intra- and inter-chromosomal rearrangements. However, only a few comparative maps have been established between dog and other non-Canidae species. Here, we extended cross-species painting with dog probes to seven more species representing six carnivore families: Eurasian lynx (Lynx lynx), the stone marten (Martes foina), the small Indian civet (Viverricula indica), the Asian palm civet (Paradoxurus hermaphrodites), Javan mongoose (Hepestes javanicas), the raccoon (Procyon lotor) and the giant panda (Ailuropoda melanoleuca). The numbers and positions of intra-chromosomal rearrangements were found to differ among these carnivore species. A comparative map between human and stone marten, and a map among the Yangtze finless porpoise (Neophocaena phocaenoides asiaeorientalis), stone marten and human were also established to facilitate outgroup comparison and to integrate comparative maps between stone marten and other carnivores with such maps between human and other species. These comparative maps give further insight into genome evolution and karyotype phylogenetic relationships among carnivores, and will facilitate the transfer of gene mapping data from human, domestic dog and cat to other species. PMID:22086079

  20. Defining the potential repository siting block Yucca Mountain, Nevada

    SciTech Connect

    Elayer, R.W.; Nolting, R.M. III [Morrison Knudsen Corp., Las Vegas, NV (United States)

    1996-12-01

    Siting activities for the potential high-level nuclear waste repository at Yucca Mountain focused on locating a suitable host geologic horizon above the water table. The Topopah Spring Tuff of the Paintbrush Group was identified as the most suitable geologic unit. Sandia National Laboratories (Sandia) identified six areas as potential repository sites. Area known as the Primary Area, is the site of the present characterization and design activities. To support current repository Advanced Conceptual Design, a reevaluation of the Primary Area was conducted by the Yucca Mountain Project`s Management and Operating Contractor (M&O). The purpose of the study was to more precisely define the block volume that would be suitable for siting the repository. The Lynx Geoscience Modeling software (Lynx) was selected to be used in this work because of its three-dimensional modeling and visualization capability for geology and underground excavation design. The Lynx model YMP.MO2 was developed in the study. The model includes surfaces that were constructed to represent each of the following limiting criteria: faults, overburden, repository host horizon, and groundwater. The resulting potential repository siting block is the useable volume within these limiting criteria.

  1. Antibodies to selected pathogens in free-ranging terrestrial carnivores and marine mammals in Canada.

    PubMed

    Philippa, J D W; Leighton, F A; Daoust, P Y; Nielsen, O; Pagliarulo, M; Schwantje, H; Shury, T; Van Herwijnen, R; Martina, B E E; Kuiken, T; Van de Bildt, M W G; Osterhaus, A D M E

    2004-07-31

    Antibody titres to selected pathogens (canine adenovirus [CAV-2], feline herpesvirus [FHV], phocine herpesvirus [PHV-1], canine distemper virus, dolphin morbillivirus [DMV], phocine distemper virus [PDV], parainfluenza virus type 3 [PI3], rabies virus, dolphin rhabdovirus [DRV], canine coronavirus, feline coronavirus, feline leukaemia virus, Borrelia burgdorferi and Toxoplasma gondii) were determined in whole blood or serum samples from selected free-ranging terrestrial carnivores and marine mammals, including cougars (Fellis concolor), lynxes (Fellis lynx), American badgers (Taxidea taxus), fishers (Martes pennanti), wolverines (Gulo gulo), wolves (Canis lupus), black bears (Ursus americanus), grizzly bears (Ursus arctos), polar bears (Ursus maritimus), walruses (Odobenus rosmarus) and belugas (Delphinapterus leucas), which had been collected at several locations in Canada between 1984 and 2001. Antibodies to a number of viruses were detected in species in which these infections have not been reported before, for example, antibodies to CAV-2 in walruses, to PDV in black bears, grizzly bears, polar bears, lynxes and wolves, to DMV in grizzly bears, polar bears, walruses and wolves, to PI3 in black bears and fishers, and to DRV in belugas and walruses. PMID:15338705

  2. Responses of beaver (Castor canadensis Kuhl) to predator chemicals.

    PubMed

    Engelhart, A; Müller-Schwarze, D

    1995-09-01

    Free-ranging beaver (Castor canadensis) in two different beaver populations in New York State were exposed to predator chemicals to test feeding inhibition. Solvent extracts of feces were applied to stem sections of aspen, the preferred food tree of beavers, permitting smelling and tasting the samples. Predator odors were from wolf (Canis lupus), coyote (Canis latrans), dog (Canis familiaris), black bear (Ursus americanus), river otter (Lutra canadensis), lynx (Lynx canadensis), and African lion (Panthera leo). The experiment was repeated. The predator odors reduced feeding compared to untreated or solvent-treated controls. One population consumed 17.0% of the samples with predator odor and 27.0% of the controls in summer, and 48.4% and 60.0%, respectively, in autumn. The other population accepted 3.15% of the predator odor samples and 11.05% of the controls in summer. Coyote, lynx, and river otter odors had the strongest effects. Diesel oil and bitter-tasting neem extract had weaker effects. Predator odors are promising as feeding repellents for beaver. PMID:24234632

  3. Suborbital Research and Education Missions with Commercial Reusable Launch Vehicles

    NASA Astrophysics Data System (ADS)

    Rodway, K.; Nelson, A.; Voigt, J.

    2012-12-01

    Suborbital reusable launch vehicles (sRLV) will provide low-cost, flexible, and frequent access to space. In the case of XCOR's Lynx, the vehicle design and capabilities work well for hosting specially designed experiments that can be flown with a human-tended researcher or alone with the pilot on a unique mission on a customized flight trajectory. This new manned, reusable commercial platform will allow for repeated observations with a single instrument, but without the need to refurbish the vehicle between flights. In addition, the short turn-around means a researcher can do multiple observations, measurements, or targets. The vehicle is designed for multi-mission primary and secondary payload capabilities, including: in-cockpit experiments and instrumentation testing, externally mounted experiments, upper atmospheric sampling, and microsatellite launch. This vehicle takes off horizontally from a runway and will go into a powered ascent attaining Mach 2.9 maximum airspeed. After about three minutes and at approximately 58 km (190,000 ft) the engines are shutdown and the RLV then coasts upwards. The low gravity period (at or below 0.001go) begins soon after at 3.35 minutes and the microgravity period (at or below 10-6go) starts at 4.25 minutes. At approximately four and half minutes the vehicle reaches apogee of 100 km (328, 000 ft). After reentry and a Max-G force pullout of 4 g, the Lynx touches down on the takeoff runway after approximately 30 minutes.Typical Lynx Mark II flight profile

  4. Production and characterization of ion beams from magnetically insulated diodes

    SciTech Connect

    Neri, J.M.

    1982-01-01

    The operation of magnetically insulated diodes and the characteristics of the resulting ion beams have been investigated using two pulsed power generators, LYNX at the 10/sup 9/W power level, and Neptune at the 10/sup 11/W power level. LYNX is a small magnetically insulated diode driven directly by a Marx bank. By changing the material used as the surface flashover ion source, the majority ion species generated by the diode could be chosen. Ion beams produced so far by this device are: protons, lithium, boron, carbon, sodium, strontium, and barium. Typical beam parameters for the ion beams are peak energies of 300 keV, current densities of 40 to 60 A/cm/sup 2/, and pulse durations of 300 to 400 nsec. The ion beam uniformity, divergence, and reproducibility were shown to be a function of the surface flashover source geometry. Finally, the LYNX ion beam was also used to anneal silicon crystals and other materials science experiments. The diode used on the Neptune generator was designed to study virtual cathode formation in a high power magnetically insulated diode. The physical cathode was replaced by electrons that ExB drift on the applied magnetic field lines. It was found that the best electrode configuration is one in which the electrons are required to only undergo the Hall drift to form the cathode. The divergence of the ion beam was examined with time-dependent and time-integrated shadowbox diagnostics. It was found that the intrinsic divergence of the ion beam does not have a strong directional dependence.

  5. Seroprevalences of antibodies to Neospora caninum and Toxoplasma gondii in zoo animals.

    PubMed

    Sedlák, K; Bártová, E

    2006-03-31

    Neospora caninum is an apicomplexan parasite that causes neuromuscular disease in dogs and abortions in cattle. Little is known about the prevalence of antibodies to this parasite in zoo animals. Sera from 556 animals, from 13 Czech and Slovak zoos were tested for antibodies to N. caninum and Toxoplasma gondii by indirect fluorescent antibody test. Antibodies to N. caninum were found in 31 of 556 zoo animals (5.6%), representing 18 of 114 species tested: Eurasian wolf (Canis lupus lupus), Maned wolf (Chrysocyon brachyurus), fennec (Vulpes zerda), cheetah (Acinonyx jubatus), jaguarundi (Herpailurus yaguarondi), Eurasian lynx (Lynx lynx), Indian lion (Panthera leo goojratensis), fisher (Martes pennanti), blackbuck (Antilope cervicapra), European bison (Bison bonasus), lechwe (Kobus leche), African buffalo (Syncerus caffer caffer), eland (Taurotragus oryx), sitatunga (Tragelaphus spekei gratus), Thorold's deer (Cervus albirostris), Eastern elk (C. elaphus canadensis), Vietnam sika deer (C. nippon pseudaxis) and Père David's deer (Elaphurus davidianus). Titres ranged from 1:40 to 1:2560. The highest prevalence 50% was found in family mustelidae of the order carnivora. Antibodies to T. gondii were detected in 193 of 556 zoo animals (34.7%) representing 72 of 114 species tested, with titres ranging from 1:40 to 1:40960. The highest prevalence 100% was found in families: hyaenidae, mustelidae, ursidae and viveridae of the order carnivora. The results of this study indicate that zoo animals have more exposure to T. gondii than to N. caninum. It is the first report of seroprevalence of antibodies to N. caninum in European zoo animals. PMID:16387445

  6. Effects of porcine zona pellucida immunocontraceptives in zoo felids.

    PubMed

    Harrenstien, Lisa A; Munson, Linda; Chassy, Lisa M; Liu, Irwin K M; Kirkpatrick, Jay F

    2004-09-01

    Methods of contraception are necessary for management of zoo felids; however, the most commonly used contraceptive (melengestrol acetate implant) is associated with serious adverse reactions with long-term use. Porcine zona pellucida (pZP) vaccines are promising as contraceptives, but their safety in zoo felids has not been tested. pZP vaccine was administered to 27 female felids representing 10 species, including African lion (Panthera leo), Asian leopard (P. pardus), jaguar (P. onca), tiger (P. tigris), snow leopard (P. uncia), cougar (Felis concolor), Siberian lynx (F. lynx), Canada lynx (F. canadensis), serval (F. serval), and bobcat (F. rufus), in 15 facilities. Over 6 wk, each animal received three i.m. injections of 65 microg pZP with Freund's complete adjuvant (FCA), Freund's incomplete adjuvant, or carbopol as the adjuvant. Behavioral signs of estrus were seen in 14 of the vaccinated felids. An unacceptably high incidence of adverse reactions was seen including injection site swelling, lameness, limb swelling, or abscessation (or all) in five felids after injection with FCA as the initial adjuvant. Adverse behavioral signs, including increased irritability and aggression, were seen in four felids. Six of the felids were assayed for antibodies against pZP during the 12 mo after vaccination; all showed antibody production. Antibody levels appeared to peak 1-4 mo after vaccination began, although elevated antibody levels persisted in two animals for > 12 mo after the first injection. All vaccinated felids were ovariohysterectomized 3-13 mo after vaccination. Folliculogenesis was present in all treated animals, and there was no histopathologic evidence of inflammatory damage to ovaries. Contraceptive efficacy was not specifically evaluated in this study; however, two of the three felids housed with an intact male became pregnant during the study, one of which gave birth to healthy cubs. PMID:15526881

  7. [Analysis and identification of chemical constituents in Siwu decoction by UPLC-Q-TOF-MS(E)].

    PubMed

    Wang, Zhen-Fang; Zhao, Yang; Pang, Xu; Yu, He-Shui; Kang, Li-Ping; Gao, Yue; Ma, Bai-Ping

    2013-11-01

    This research analyzed the chemical constituents of Siwu decoction by UPLC-Q-TOF-MS(E). Base on the data of mass and related-literatures, 43 peaks were profiled and 25 compounds, which contain 8 monoterpene glycosides from Paeonia lactiflora and 13 phthalides from Rhizoma chuanxiong and Radix angelica sinensis mainly, were identified in both positive and negative mode respectively. Meanwhile, chemical constituents of water extract and 60% ethanol extract of Siwu decoction were compared by the principal constituent analysis with MarkerLynx software, which provides the basis for the active ingredients of Siwu decoction. PMID:24494558

  8. Access to the Internet and Web

    NSDL National Science Digital Library

    Recently revised, this page from the Blindness Resource Center is an annotated directory of Websites dealing with issues of Internet access for the blind. The categories include accessible Web design, LYNX Web browser use, Net Tamer, access resources, Unix access, Java access, Windows access, and other blindness links. The sites presented are sharply-focused and provide specific information and instructions for the blind and support staff on software designed to improve access, as well as detailed advice to Webmasters on creating sites that are accessible. The Website is sponsored and maintained by the New York Institute for Special Education.

  9. Bobcat attack on a cottontail rabbit

    USGS Publications Warehouse

    Biggins, D.E.; Biggins, D.M.

    2006-01-01

    We observed an attack by a bobcat (Lynx rufus) on a cottontail rabbit (Sylvilagus) that involved stealthy approach by the cat for >1 h, followed by a 12.3-s chase covering 116.0 m for the cat and 128.4 m for the rabbit. During the chase, the route of the cat from starting point to kill site was more direct than the semi-circular route of the rabbit. Stride lengths for the cat and total distance covered by the chase were longer than those previously reported for bobcats.

  10. Evidence of a limited schizogonous cycle for Cytauxzoon felis in bobcats following exposure to infected ticks.

    PubMed

    Blouin, E F; Kocan, A A; Kocan, K M; Hair, J

    1987-07-01

    Schizogonous tissue stages of Cytauxzoon felis (Apicomplexa: Theileridae) were not observed by microscopic evaluation of impression smears of liver, spleen, lung and lymph nodes in 10 bobcats (Lynx rufus) from Oklahoma with naturally occurring piroplasm infections. Schizogonous stages were observed in similar tissues from experimentally-infected bobcats at 11 days postexposure to infected Dermacentor variabilis, but not at 30 days following tick feeding. The schizogonous cycle of this parasite appears to be short, although the bobcat appears to be a long-term carrier. PMID:3114505

  11. Toxoplasma antibodies among bobcats and other carnivores of norther California.

    PubMed

    Riemann, H P; Howarth, J A; Ruppanner, R; Franti, C E; BEHYMER, D E

    1975-04-01

    The prevalence of antibodies to Toxoplasma gondii was investigated among five species of wild carnivores in Norther Ccalifornia. The highest prevalence was among bobcats (Lynx rufus), with 15 of 21 tested being serologically positive. Other results included serological evidence of toxoplasmosis in two of seven raccoons (Procyon lotor), one of three badgers (taxidea taxus) and two of three coyotes (Canis latrans). Two gray foxes (Urocyon cinereoargenteus) were serologically negative. Oone badger with an indirect hemagglutination antibody titer of 1:8192 was found to harbor T. gondii in its brain tissues. PMID:1142562

  12. Evaluating the operations capability of Freedom's Data Management System

    NASA Technical Reports Server (NTRS)

    Sowizral, Henry A.

    1990-01-01

    Three areas of Data Management System (DMS) performance are examined: raw processor speed, the subjective speed of the Lynx OS X-Window system, and the operational capacity of the Runtime Object Database (RODB). It is concluded that the proposed processor will operate at its specified rate of speed and that the X-Window system operates within users' subjective needs. It is also concluded that the RODB cannot provide the required level of service, even with a two-order of magnitude (100 fold) improvement in speed.

  13. Synthetic aperture radar for disaster monitoring

    NASA Astrophysics Data System (ADS)

    Dunkel, R.; Saddler, R.; Doerry, A. W.

    2011-06-01

    Synthetic Aperture Radar (SAR) is well known to afford imaging in darkness and through clouds, smoke, and other obscurants. As such, it is particularly useful for mapping and monitoring a variety of natural and man-made disasters. A portfolio of SAR image examples has been collected using General Atomics Aeronautical Systems, Inc.'s (GA-ASI's) Lynx® family of Ku-Band SAR systems, flown on both operational and test-bed aircraft. Images are provided that include scenes of flooding, ice jams in North Dakota, agricultural field fires in southern California, and ocean oil slicks from seeps off the coast of southern California.

  14. Performances of new green sensitive liquid photopolymers for volume phase holographic gratings

    NASA Astrophysics Data System (ADS)

    Zanutta, Alessio; Bianco, Andrea; Zerbi, Filippo M.

    2012-03-01

    Liquid photopolymers produced by Polygrama-Lynx (SM-532TR and SM-532TRF) have been studied to determine their performances in terms of refractive index modulation, transparency and overall optical quality. Volume phase holographic gratings (VPHGs) based on these materials have been obtained using a 532 DPSS laser and the grating efficiency has been measured at different angles and wavelengths. Using the Kogelnik model and/or the RCWA approach, the thickness and the refractive index modulation has been determined for gratings as function of light exposure, line density, etc. Index modulations up to 0.03 together with good optical quality were obtained.

  15. ac powertrain for an electric vehicle. Phase 2 and Phase 3 final report

    SciTech Connect

    Slicker, J.M.

    1984-11-01

    This report describes work relating to Phases 2 and 3 development and testing of an ac powertrain for a 25 hp four-passenger electric vehicle. The system, which consists of a two-speed automatic mechanical transaxle, 18.6 kW ac induction traction motor, 33.6 kW inverter and overall logic controller, was installed and evaluated in a converted Mercury Lynx rolling test bed vehicle. An on-board charger and an auxiliary dc-to-dc converter were integrated into the inverter/controller package.

  16. Test plan for performance testing of the Eaton AC-3 electric vehicle

    SciTech Connect

    Crumley, R.L.; Heiselmann, H.W.

    1985-04-01

    An alternating current (ac) propulsion system for an electric vehicle has been developed and tested by the Eaton Corporation. The test bed vehicle is a modified 1981 Mercury Lynx. The test plan has been prepared specifically for the third modification to this test bed and identified as the Eaton AC-3. The scope of the EG and G testing at INEL to be done on the Eaton AC-3 will include coastdown and dynamometer tests but will not include environmental, on-road, or track testing. Coastdown testing will be performed in accordance with SAE J-1263 (SAE Recommended Practice for Road Load Measurement and Dynamometer Simulation Using Coastdown Techniques).

  17. First Student Project at the University of Tennessee at Martin Observatory

    NASA Astrophysics Data System (ADS)

    Crews, Lionel J.; Turner, K.; Wesner, P.

    2011-05-01

    The University of Tennessee at Martin has recently completed the construction and setup of an observatory. The dome houses a 16" Meade telescope with SBIG STL-11000M CCD. For its first project, observations of the Delta Scuti type variable SZ Lynx were taken in March and analyzed using MiraPRO. A simple ephemeris calculation was done, and compared to previous results. This project was done under the University Scholars program, a four year scholarship program which includes a faculty-mentored research project.

  18. Exploring Potential Chemical Transformation by Chemical Profiling Approach for Rapidly Evaluating Chemical Consistency between Sun-Dried and Sulfur-Fumigated Radix Paeoniae Alba Using Ultraperformance Liquid Chromatography Coupled with Time-of-Flight Mass Spectrometry

    PubMed Central

    Zhang, Jida; Cai, Hao; Cao, Gang; Liu, Xiao; Wen, Chengping; Fan, Yongsheng

    2013-01-01

    Ultraperformance liquid chromatography coupled with time-of-flight mass spectrometry (UPLC-QTOF/MS) based on a chemical profiling method was applied to rapidly evaluate the chemical consistency between sun-dried and sulfur-fumigated Radix Paeoniae Alba. By virtue of the high resolution, high speed of UPLC, and the accurate mass measurement of TOFMS coupled with reliable MarkerLynx software, five newly assigned monoterpene glycoside sulfonates were found and identified in sulfur-fumigated Radix Paeoniae Alba samples. This method could be applied for rapid quality evaluation of different kinds of sulfur-fumigated Radix Paeoniae Alba among commercial samples. PMID:24381637

  19. Beamline operation using an industrial control system and distributed object-oriented hardware access

    SciTech Connect

    Butler, H.; Myers, D.R.; Rueden, W. von; Yang, J. (CERN, Geneva (Switzerland). ECP Div.)

    1994-02-01

    The authors describe the Control System of the CERN Neutrino Beamline, based on FactoryLink and equipment controllers using PCs running LynxOS. FactoryLink runs on a workstation and connects via communications tasks over Ethernet to both the PCs and the data acquisition systems of the experiments. The PCs access VME and CAMAC directly via the VICbus. Object-oriented control software, entirely data driven, deals with hardware modules and local survey operations. Remote stations have access via X-Window.

  20. Analysis of the regulatory region of the heat-shock gene rpoH of Escherichia coli strains isolated from non-human hosts 1 The DNA sequences of the regulatory region of gene rpoH of Escherichia coli strains isolated from non-human hosts have been deposited in the DNA databank of GenBank (USA). Sequences from strains isolated from eagle, rice rat, jaguar, lynx, manatee, dolphin, koala, possum, equidna, platypus, penguin, seal, and whale, have been given the accession Nos. AF382227, AF382228, AF382229, AF382230, AF382231, AF382232, AF382233, AF382234, AF382235, AF382236, AF382237, AF382238 and AF382239, respectively. 1

    Microsoft Academic Search

    Gloria Sol??s-Guzmán; Jesús Ram??rez-Santos; Valeria Souza; M. Carmen Gómez-Eichelmann

    2001-01-01

    The regulatory region of the gene for ?32, rpoH, of Escherichia coli strains isolated from non-human hosts and different geographic regions, was sequenced and compared with that of E. coli K12. The main nucleotide changes observed are localized to the right inverted octamer motif of the CytR box. The effect of these changes was evaluated using transcriptional fusions. The results