These are representative sample records from Science.gov related to your search topic.
For comprehensive and current results, perform a real-time search at Science.gov.
1

Reproductive biology of the pampas deer (Ozotoceros bezoarticus): a review  

Microsoft Academic Search

The pampas deer (Ozotoceros bezoarticus) is a South American grazing deer which is in extreme danger of extinction. Very little is known about the biology of the pampas deer. Moreover, most information has not been published in peer-reviewed scientific journals, and is only available in local publications, theses, etc. Therefore, our aim was to update and summarize the available information

Rodolfo Ungerfeld; Solana González-Pensado; Alejandro Bielli; Matías Villagrán; Daniel Olazabal; William Pérez

2008-01-01

2

Pampas deer (Ozotoceros bezoarticus) courtship and mating behavior  

PubMed Central

Background Pampas deer, Ozotoceros bezoarticus (Linnaeus 1758), is a South American grazing deer categorized as "near threatened". However, knowledge about pampas deer behavior including courtship and mating is scarce and incomplete. The aim of this study was to characterize the courtship and mating behavior of the pampas deer (Ozotoceros bezoarticus), an endangered species from South America. Methods We performed focal observations of 5 males allocated at the Estación de Cría de Fauna Autóctona Cerro Pan de Azúcar, Uruguay, 4 times a day from 5 to 20 minutes each time on a daily basis from February to May. During that period we recorded all courtship and mating behaviors, as well as quantified the frequency of the specific behaviors shown. As mating were rarely observed, we recorded that behavior when it was observed in the context of other studies performed in the same population during the following 2 years. Results During the observation period we recorded 928 courtships and 5 mating periods. In addition, we recorded 10 more matings performed during other studies, totaling 15. The duration of each mating calculated from the 15 recordings was 3.9?±?0.4 s, and the total period of female receptivity (from first to last mating acceptance) was 8.2?±?1.1 min. Main observed courtship behaviors in males were “chase” and “ostentation”, while the most observed close to mating were “chinning”, “raised head” and “anogenital sniffing”. The most observed behaviors in females during the mating period were “vulva exhibition” and “move away”. Conclusion This is the first detailed report in pampas deer mating behavior. Estrus lasted only 8 min accepting only 3 short copulations per estrus. However, female behavior during courtship can be characterized as highly proceptive. PMID:23062236

2012-01-01

3

Sperm characterization and identification of sperm sub-populations in ejaculates from pampas deer (Ozotoceros bezoarticus).  

PubMed

Pampas deer (Ozotoceros bezoarticus) is a native endangered species. Knowledge of the basic spermiogram characteristics and the morphometric descriptors is necessary to effectively develop sperm cryopreservation. In other species, sperm sub-population is related to sperm cryo-resistance. The objective was to provide a general description of the sperm, including sperm head morphometric descriptors, its repeatability, and the existence of sperm sub-populations. Sperm were obtained from adult males by electroejaculation during the breeding season. The motility score was 3.4±0.2 (mean±SEM) and progressive motility was 59.4±3.7%. Ejaculated volume was 413.9±51.0?l, the total number of sperm ejaculated was 321.2±55.4×10(6). Also, 63.3±3.1% of the sperm were morphologically abnormal and 23.7±2.3% had acrosome damage. The sperm head length was 7.6±0.01?m, width 4.4±0.01?m, area 28.1±0.07?m(2) and the perimeter was 21.9±0.04?m. There was a positive relationship among morphometric descriptors and the motility score, overall motility and progressive motility. Also length (P=0.011), width (P=0.003), area (P=0.006) and perimeter (P=0.009) of sperm head obtained in two different collections were positively related. Overall, the low concentration, volume, overall quality and abnormal morphology, and wide variation of these variables may be a limitation for the development of sperm cryopreserved banks. There were three sperm sub-populations with different morphometric characteristics. The morphometric descriptors are maintained similarly among different collections. PMID:25104472

Beracochea, F; Gil, J; Sestelo, A; Garde, J J; Santiago-Moreno, J; Fumagalli, F; Ungerfeld, R

2014-10-01

4

Arterial Thoracic Vascularization in Some Deer Species: Pampas Deer (Ozotoceros bezoarticus), Brown Brocket Deer (Mazama gouazoubira) and Axis Deer (Axis axis).  

PubMed

In this study, the arterial distributions of the aortic arches of three deer species (Axis axis, Ozotoceros bezoarticus and Mazama gouazoubira) were described. The animals were dissected immediately after being found dead. Latex injection method was used to observe the vascularization of the thorax. The branching pattern of the arteries of the thoracic aorta in O. bezoarticus was similar to domestic ruminants. In the M. gouazoubira and A. axis, there were no bicarotid trunk. Interestingly, the first branch of the brachiocephalic trunk was the left costocervical trunk in A. axis. Then, brachiocephalic trunk was divided into right and left subclavian arteries. M. gouazoubira and A. axis in contrast to O. bezoarticus were different when compared with other ruminants, and the absence of bicarotid trunk was more striking than previous reports. PMID:24611999

Pérez, W; Erdo?an, S

2014-12-01

5

Physiological and biochemical parameters in response to electroejaculation in adult and yearling anesthetized pampas deer (Ozotoceros bezoarticus) males.  

PubMed

The aim of this study was to characterize changes in physiological and biochemical parameters during electroejaculation (EE) under general anaesthesia in adult and yearling pampas deer males (Ozotoceros bezoarticus). The relation between heart rate, pulse rate, respiratory rate and oximetry with EE voltages was studied. The changes in cortisol, alkaline phosphatase, creatine kinase, aspartate aminotransferase and rectal temperature were determined before and after electroejaculation (BEE and AEE). Heart rate and pulse rate values increased during EE, with a greater increase in heart rate in adults (p < 0.01). Respiratory rate and SpO(2) were not affected by EE or category. The rectal temperature decreased in adults and yearlings during EE (p = 0.0001). Alkaline phosphatase, creatine kinase and aspartate aminotransferase concentrations increased AEE (p < 0.001, p < 0.01 and p?

Fumagalli, F; Villagrán, M; Damián, J P; Ungerfeld, R

2012-04-01

6

Broncopneumonia causada por Arcanobacterium pyogenes em Veado Campeiro (Ozoteceros bezearticus). Bronchopneumonia caused by Arcanobacterium pyogenes in Pampas Deer (Ozoteceros bezearticus)  

Microsoft Academic Search

Arcanobacterium pyogenes is a commensal bacteria of the mucous membranes of the respiratory and genital tracts of a number of domestic and wildlife animal species. However, following a stress or traumatic insults, A. pyogenes can become an opportunistic pathogen, associated with suppurative infections. Stress is an important risk factor for disease in all animals but especially in wild animals unaccustomed

Joelma Lucioli; Fernando Henrique Furlan; Denis Augusto Spricigo; Sandra Maria Ferraz; Sandra Davi Traverso

7

Morphological Examination of the Obturator Notch and Canal in Cervidae  

PubMed Central

ABSTRACT The purpose of this study was to investigate gross findings of the obturator notch (ON) and obturator canal (OC) in Cervidae. A total of 183 pelvic girdles from 26 species of deer were examined, and the obturator canal (OC) was classified into 4 types based on the degree of separation from the obturator foramen (OF). The deep ON was observed primarily in the subfamily Capreolinae (telemetacarpal deer). The small bony OC was frequently observed in Hydropotes inermis, Mazama gouazoubira and Ozotoceros bezoarticus. A canal without a tubercle or bony bridge structure was mainly observed in the subfamily Cervinae (plesiometacarpal deer). These results suggest that the deep ONs or the OCs separated by bony structures are more common in telemetacarpal rather than plesiometacarpal deer. PMID:24430657

TAE, Hyun-Jin; PARK, Byung-Yong; KIM, In-Shik; AHN, Dongchoon

2014-01-01

8

Morphological examination of the obturator notch and canal in cervidae.  

PubMed

The purpose of this study was to investigate gross findings of the obturator notch (ON) and obturator canal (OC) in Cervidae. A total of 183 pelvic girdles from 26 species of deer were examined, and the obturator canal (OC) was classified into 4 types based on the degree of separation from the obturator foramen (OF). The deep ON was observed primarily in the subfamily Capreolinae (telemetacarpal deer). The small bony OC was frequently observed in Hydropotes inermis, Mazama gouazoubira and Ozotoceros bezoarticus. A canal without a tubercle or bony bridge structure was mainly observed in the subfamily Cervinae (plesiometacarpal deer). These results suggest that the deep ONs or the OCs separated by bony structures are more common in telemetacarpal rather than plesiometacarpal deer. PMID:24430657

Tae, Hyun-Jin; Park, Byung-Yong; Kim, In-Shik; Ahn, Dongchoon

2014-05-01

9

Retrospective study of central nervous system lesions and association with Parelaphostrongylus species by histology and specific nested polymerase chain reaction in domestic camelids and wild ungulates.  

PubMed

Formalin-fixed, paraffin-embedded tissues from elk (Cervus elaphus), goats, and camelids with case histories and lesions suggestive of Parelaphostrongylus tenuis were examined by histology to characterize lesions that could aid in definitively diagnosing P. tenuis infection. Additionally, sections of paraffin-embedded tissue were used in a nested polymerase chain reaction (nPCR) using Parelaphostrongylus-specific primers to determine how PCR results corresponded with histological findings. Histological changes in brain and spinal cord consisted of linear tracks of hemorrhage; tracks or perivascular accumulations of hemosiderin-laden macrophages; acute foci of axonal degeneration and/or linear glial scars; and perivascular, parenchymal, or meningeal accumulations of eosinophils and/or lymphocytes and plasma cells. Of the 43 samples with histologic lesions consistent with neural larval migrans, 19 were PCR positive; however, only 8 were confirmed Parelaphostrongylus by DNA sequencing. Additionally, 1 goat was identified with a protostrongylid that had a 97% identity to both Parelaphostrongylus odocoilei and a protostrongylid nematode from pampas deer (Ozotoceros bezoarticus celer) from Argentina. None of the histologic lesions individually or in combination correlated statistically to positive molecular tests for the nematode. The results indicate that it is possible to extract Parelaphostrongylus DNA from formalin-fixed, paraffin-embedded tissue, but extended fixation presumably can cause DNA crosslinking. Nested PCR provides another diagnostic tool to identify the cause of neurologic disease in camelids and elk with histologic lesions consistent with neural larval migrans. Furthermore, potential novel protostrongylid DNA was detected from a goat with lesions consistent with P. tenuis infection, suggesting that other neurotropic Parelaphostrongylus species may occur locally. PMID:25274743

Dobey, Carrie L; Grunenwald, Caroline; Newman, Shelley J; Muller, Lisa; Gerhold, Richard W

2014-11-01