Comparative mortality levels among selected species of captive animals
We present life tables by single year of age and sex for groups of animals and for 42 individual mostly mammalian species. Data are derived from the International Species Information System. The survivorship of most of these species has never been mapped systematically. We demonstrate that, in most of the groups, female survivorship significantly exceeds […]
The effects of prorating risk in the development of life-tables
Abstract 10.1002/zoo.1028.abs This study used computer models to investigate two different strategies for assessing risk in the development of age-based life-tables from studbook data sets. One methodology is similar to that currently employed in American Zoo and Aquarium Association population management, which prorates animals at risk within age-classes. The other follows the method used in […]
Demographics of captive De Brazza’s guenons
Abstract 10.1002/zoo.1430080106.abs Survival and fertility rates of captive De Bràzza’s guenons (Cercopithecus neglectus), based on the 575 known captive animals in 70 zoos and institutions worldwide, were calculated. The results suggest that the high level of infant mortality (males: dx(day 1-yr 1) = 0.73 males; females; dx(day 1-yr 1) = 0.51), low fertility rate (Σ […]