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AE Jackson 《Australian veterinary journal》2011,89(5):147-148
Computer simulations of resistance to monepantel · Typing fowl adenoviruses in field cases of inclusion body hepatitis · Skin fold flaps for large lumbosacral wounds in dogs · Colic after swimming training in racehorses · Columbid herpesvirus‐1 in birds of prey 相似文献
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AE Jackson 《Australian veterinary journal》2010,88(1-2):1-3
Septic osteomyelitis in foals · Partial pressure of arterial carbon dioxide during general anaesthesia in horses · Mastocytoma in digital flexor tendons of a horse · Immune-mediated haemolytic anaemia in dogs · Spotted fever group rickettsial antibodies in cats and dogs in Tasmania · Consequences of false-positive results for Chlamydophila abortus in Australian sheep for the rejection of breeder sheep for export · Femoral diaphysis fractures in cattle · Haemolytic anaemia in cattle in New South Wales associated with Theileria infections · Stimulation test for determining the steroidogenic capacity of the parrot testis · Seminoma in a black rhinoceros 相似文献
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P Comizzoli AE Crosier N Songsasen M Szykman Gunther JG Howard DE Wildt 《Reproduction in domestic animals》2009,44(S2):47-52
Knowledge about reproduction is critical for predicting the viability of wildlife populations in nature and for managing breeding programmes in captivity. Intensive species-based studies are the priority, because reproductive mechanisms are extraordinarily diverse, even within the same taxonomic family. Carnivores deserve more attention as such species are highly vulnerable to environmental change and human persecution. The present review provides contemporary illustrations of how reproductive science is contributing to understand unique reproductive mechanisms that are both of fundamental and applied interest. In the case of the endangered African wild dog ( Lycaon pictus ) free-living in South Africa, non-invasive faecal corticosteroid assessments have yielded new insights about the impact of animal relocation and reintroduction on adaptive responses, reproductive fitness and survival. For the maned wolf ( Chrysocyon brachyurus ), advances have been made in characterizing and comparing reproductive traits in free-ranging vs captive individuals. For the cheetah ( Acinonyx jubatus ), recent studies have focused on the cryosensitivity of sperm and the ability to develop a field-friendly sperm cryo-method. The by-product has been a large-scale frozen repository of sperm from wild-caught cheetahs useful for infusing new genes into ex situ populations. Finally, rigorous, multi-disciplinary and cross-institutional reproductive studies of the black-footed ferret ( Mustela nigripes ), including the use of artificial insemination, have contributed to the remarkable recovery and restoration of this species, once on the brink of extinction. In summary, advances in reproductive science are not necessarily related to 'assisted breeding'. However, understanding the unique ways of carnivore reproduction greatly contributes to species management and conservation. 相似文献
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KF DOWSETT LM KNOTT U. TSHEWANG AE JACKSON DAY BODERO TE TRIGG 《Australian veterinary journal》1996,74(3):228-235
Objective: To investigate the effect of two dose rates (200 and 400 ng) of a gonadotrophin releasing hormone (GnRH) vaccine on testicular function. Design: A vaccination dose rate experiment. Procedure: Two injections were administered 4 weeks apart to six colts in each treatment group. To maintain immunosuppression until the end of the breeding season, a third injection was given if antibody titres fell below 1000. Results: Effective antibody titres were present for 12 to 27 weeks. Testosterone concentrations decreased from 2.22 to 0.31 nmol/L 6 weeks after primary vaccination. Androstenedione concentrations decreased from 1.78 to 0.28 nmol/L 5 weeks after vaccination. Testosterone and androstenedione concentrations above 0.69 and 0.87 nmol/L were attained 31 to 43 weeks after vaccination. Mean scrotal widths and lengths decreased over 29 weeks from 9.2 cm and 9.7 cm to 6.7 cm and 7.6 cm. At surgical castration these dimensions were 10.1 cm and 11.0 cm. Mean semen characteristics before vaccination and after recovery were: gel-free volume 16.5 and 13.5 mL, sperm concentration 295.5 times 106 315.6 times 106/mL, total sperm per ejaculate 4041 times 106 4657 times 106 live normal spermatozoa 32% and 60%. Histologically, the testes showed active spermatogenesis. The mean testicular parenchyma weights for the 200 and 400 mg groups were 129.0 g and 109.8 g. Daily sperm production per testis and per gram of testis for the 200 and 400 mg groups were 3.7 times 108 2.8 times 106 2.3 times 108 2.0 times 106. Conclusions: Both dose rates suppressed testicular function. Data showed that the vaccine effects were reversible. Individual immune response was less varied in the 200 mg group. Further work is necessary to achieve a less variable response in the immunosuppression of testicular function. 相似文献
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