Annual Changes in Fecal Estradiol-17 β Concentrations of the Sun Bear (Helarctos malayanus) in Sarawak, Malaysia

Journal of Veterinary Medical Science

Masatsugu SUZUKI¹  Eiji UCHIDA³  Noriyuki OHTAISHI¹  Masami NIIYAMA³  Manabu ONUMA² 

[1] Laboratory of Wildlife Biology, Graduate School of Veterinary Medicine, Hokkaido University;Semenggoh Wildlife Rehabilitation Center, Sarawak Forestry Department Wisma Sumber Alam;Veterinary Internal Medicine II, School of Veterinary Medicine, Rakuno Gakuen University

关键词: estradiol;    feces;    Helarctos malayanus;    seasonality;    vaginal smear;   

DOI  :  10.1292/jvms.64.309

学科分类：兽医学

来源: Japanese Society of Veterinary Science

【 摘 要 】

References(10)Cited-By(10)Fecal estradiol concentrations were measured in three captive unmated female sun bears (Helarctos malayanus) from August 1998 to July 1999 in Sarawak, Malaysia and vaginal smears from one of the females was observed in August 1998 and March 1999. A single peak in fecal estradiol concentration was obvious for each bear in August or September 1998, and there was a much higher percentage of superficial vaginal anuclear cells in August 1998 than in March 1999. These results suggest that sun bears in Sarawak are likely to be a seasonal breeder associated with a peak of estrogen production in August or September.

【 授权许可】

Unknown