Ultrasonographic monitoring of fetal development in unrestrained bonobos (Pan paniscus) at the Milwaukee County Zoo
Abstract The bonobo, Pan paniscus, is one of the most endangered primate species. In the context of the Bonobo Species Survival Plan®, the Milwaukee County Zoo established a successful breeding group. Although the bonobo serves as a model species for human evolution, no prenatal growth curves are available. To develop growth graphs, the animals at […]
Annual fecal glucocorticoid metabolite concentrations in pregnant and pseudopregnant polar bears (Ursus maritimus) in North American zoos
Polar bears face a tenuous existence in the wild due to climate change and in North American zoos due to a shrinking population and low reproductive success. A non-invasive diagnostic test that distinguishes pregnant from pseudopregnant bears is necessary to pinpoint when reproductive failure is occurring. However, fecal hormone metabolite patterns commonly used to determine […]