Fecal Reproductive Steroid Profiles for Monitoring Reproductive Patterns in Female Formosan Black Bears (Ursus Thibetanus Formosanus)

摘要: Fecal sexual estradiol (E2) and progesterone (P4) analyses were conducted on three adult female Formosan black bears in order to establish non-invasive enzyme-linked immunosorbent assays (ELISA) for describing the endocrine profile a simulated natural breeding environment. Moreover, we investigated whether bear living subtropical habitats Taiwan is seasonal breeder with delayed embryo implantation, ovulation pattern, maternal perinatal fasting. Our results indicate that mating behavior occurred both before after fecal E2 peak of March–June. P4 concentrations initially increased mating, then decreased lower levels, finally again, which indicative embryo-implantation. levels postpartum. Peaks also observed unmated housed male without coitus: their annual higher from winter spring, similar pregnant bear. Interestingl...