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286 results found.
How many founders, how large a population?
Abstract The number of population founders and the size of the population are two important variables in determining how much gene diversity can be retained in a population. A model is developed to determine the most cost-effective balance of those two variables, based on comparing the marginal costs of increasing the number of founders vs. […]
Development of a field-friendly technique for fecal steroid extraction and storage using the African wild dog (Lycaon pictus)
Abstract 10.1002/zoo.20248.abs Hormonal analysis provides information about wildlife populations, but is difficult to conduct in the field. Our goal was to develop a rapid and effective field method for fecal steroid analysis by comparing: (1) three extraction methods (laboratory (LAB), homogenize (HO) and handshake (HS)) and (2) two storage methods (solid-phase extraction (SPE) tubes vs. […]
Results of a second survey to assess the reproductive status of female Asian and African elephants in North America
Abstract 10.1002/zoo.20238.abs Surveys are being conducted to monitor the reproductive health of elephants managed by the TAG/SSP. This study summarizes results of a 2005 survey and compares data to one conducted in 2002. Surveys were returned for 100% and 79.0% of Asian and African elephants, respectively. Of those, 79.3% of Asian and 92.1% of African […]
Extinction risk assessment for the species survival plan (SSP®) population of the Bali mynah (Leucopsar rothschildi)
Abstract 10.1002/zoo.20228.abs The Bali mynah Species Survival Plan (SSP®), an Association of Zoos and Aquariums program, strives to maintain the genetic and demographic health of its population, avoid unplanned changes in size, and minimize the risk of population extinction. The SSP population meets current demographic and genetic objectives with a population size of 209 birds […]
Evaluating the utility of an accelerometer and urinary hormone analysis as indicators of estrus in a Zoo-housed koala (Phascolarctos cinereus)
Abstract 10.1002/zoo.20212.abs Induced ovulators, such as the koala, do not always have overt signs of estrus, which makes pairing these animals for breeding purposes difficult to achieve in a zoo setting. This study examined the possibility of using alternative methods to behavioral sampling and weight fluctuations for monitoring estrus in a female koala of reproductive […]
Pregnancy diagnosis in wild canids using a commercially available relaxin assay
Abstract 10.1002/zoo.20196.abs Accurate detection of pregnancy is a useful tool in zoo management and husbandry, conservation breeding programs and research settings. Our study evaluated the ability of a commercial relaxin hormone assay used in domestic dogs (ReproCHEKTM) to accurately detect pregnancy through plasma analysis in two wolf and two fox species. The relaxin assay detected […]
An investigation of the relationship between fecal and rumen bacterial concentrations in sheep
Abstract 10.1002/zoo.20166.abs With no acceptable method for collecting fresh rumen fluid from zoo ruminants, it was proposed that fecal bacterial concentrations may be correlated with rumen bacteria. If so, fecal bacterial concentrations could be used to study both the effects of diet on rumen bacteria as well as rumen abnormalities. Total and cellulolytic bacterial concentrations […]
Feeding enrichment methods for Pacific walrus calves
Abstract 10.1002/zoo.20129.abs In the wild, walrus calves are occupied with many behaviors necessary for survival. In captivity there is usually less to occupy them. Therefore it is necessary to develop other ways to occupy the animals to prevent negative behavior. In the present study, food in four different types of dispensers were tested on two […]
Intake, utilization, and composition of browses consumed by the Sumatran rhinoceros (Dicerorhinus sumatrensis harissoni) in captivity in Sabah, Malaysia
Abstract 10.1002/zoo.20107.abs The significant threats to the fewer than 30 wild Dicerorhinus sumatrensis harrissoni, the Bornean sub-species of the Sumatran rhinoceros, are obvious and include poaching, habitat loss, and environmental changes. Subtle effects on population survival, however, include nutritional or other diseases, which affect morbidity and reproductive success. To address these issues and focus on […]
Elephant importation from range countries: ethical and practical considerations for accredited zoos
Abstract 10.1002/zoo.20102.abs Zoo elephant populations are in serious demographic peril. Advances in elephant management and care are expected to lead to improved reproductive success. The existing cohort of reproductively viable adult females is aging, however, and effective changes may not come fast enough to sustain the population over time. If so, importation of captive, semi-domesticated, […]