Reproductive Management Plan of Toledo Zoo Lowland Gorillas Over the Past 25 Years
The breeding program for gorillas at the Toledo Zoo up to 1983 had resulted in five pregnancies over an 18 year period. In 1983, we began a multifaceted effort designed to improve reproduction through behavioral, physical, dietary, and physiological evaluations. Measurement of steroidal hormones in urine proved useful in monitoring ovarian activity and, in one […]
Estrogen and LH dynamics during the follicular phase of the estrous cycle in the Asian elephant
Abstract 10.1002/zoo.10098.abs Pituitary and corpus luteum hormone patterns throughout the elephant estrous cycle have been well characterized. By contrast, analysis of follicular maturation by measurement of circulating estrogens has been uninformative. This study tested the ability of a urinary estradiol-3-glucuronide radioimmunoassay to noninvasively assess follicular development during the nonluteal phase of the elephant estrous cycle, […]
Endocrine monitoring and its application to the management of the giant panda
Abstract 10.1002/zoo.10108.abs Urinary estrogens (n=10) and progestins (n=4) were monitored in a total of 10 giant panda females. Estrogens were evaluated with two different immunoassays during the estrous period. The two different methodologies gave similar hormonal profiles, but different quantitative results due to differences in the crossreactivity of the different assay systems. High-pressure liquid chromatography […]
Reproductive, behavioral, and endocrine characteristics of the Dall’s sheep (Ovis dalli dalli)
Abstract 10.1002/(SICI)1098-2361(1996)15:13.3.CO;2-N Failed interspecific embryo transfer between Dall’s sheep (Ovis dalli dalli) and domestic ewes (Ovis aries), and a paucity of physiological data available for the Dall’s sheep, provided incentive for developing a reproductive database in Dall’s sheep. Urine samples were collected on a regular basis from a captive herd of Dall’s sheep during the […]
Urinary steroid evaluations to monitor ovarian function in exotic ungulates: X. Pregnancy diagnosis in Perissodactyla
Abstract 10.1002/zoo.1430130205.abs Enzymeimmunoassays (EIAs) for estrone conjugates (EC), pregnanediol-3-glucuronide (PDG), and C-19 and C-21 progesterone metabolites (C-19/C-21) were used to analyze urine samples from four nondomestic equid species, four tapir species, and two rhinoceros species in an attempt to identify if these assays could be used for diagnosing and monitoring pregnancy. The same urine samples […]
Urinary steroid evaluations to monitor ovarian function in exotic ungulates: VIII. Correspondence of urinary and plasma steroids in the llama (Lama glama) during nonconceptive and conceptive cycles
Abstract 10.1002/zoo.1430100306.abs Ovarian function was evaluated in mature female llamas (n = 2) during seven ovulations in 2 conceptive and 5 nonconceptive ovarian cycles by measuring urinary and plasma hormone concentrations. Ovulation was induced by three different methods; administration of gonadotropin-releasing hormone (GnRH), copulation with a vasectomized male and copulation with an intact male. Plasma […]
Urinary steroid evaluations to monitor ovarian function in exotic ungulates: VI. Pregnancy detection in exotic equidae
Abstract 10.1002/zoo.1430090105.abs The measurement of serum and urinary estrone sulfate (ES) was evaluated on random single samples for the detection of pregnancy in the Przewalski’s horse (PRZ) and Hartmann’s mountain zebra (HMZ). Pregnancy was detected by ES analysis of urine or serum in the PRZ and HMZ by at least 8 and 10 months before […]