نتایج جستجو برای: captive breeding and re
تعداد نتایج: 16860702 فیلتر نتایج به سال:
Populations of oriental white-backed vultures (Gyps bengalensis) in south Asia have declined over 95% since the mid-1990s due to feeding on livestock carcasses that had been treated with diclofenac, an anti-inflammatory pharmaceutical that is fatal to Gyps vultures. To prevent extinction, captive breeding efforts have been initiated; however, given the overall decline, it is not known to what e...
Retracing complex population processes that precede extreme bottlenecks may be impossible using data from living individuals. The wisent (Bison bonasus), Europe's largest terrestrial mammal, exemplifies such a population history, having gone extinct in the wild but subsequently restored by captive breeding efforts. Using low coverage genomic data from modern and historical individuals, we inves...
The Asian giant river toad Phrynoidis asper is a large species of bufonid from south-east Asia that apparently obtained by the international exotic-pet trade wild populations. Captive breeding this seems not to have been documented. donation Chester Zoo in October 2021 an adult group five males and one female provided opportunity study captive breeding. specimens were maintained separated sex u...
Extinction of tree snails of the genus Partula on Moorea, following introduction of the predatory snail Euglandina rosea, has challenged conservation biology during years of successive captive breeding of small rescued populations. An experimental release of three Partula species into a predator-proof patch of native forest on Moorea was designed to test effectiveness of physical and chemical m...
Mexican and red wolves were both faced with extinction in the wild until captive populations were established more than two decades ago. These captive populations have been successfully managed genetically to minimize mean kinship and retain genetic variation. Descendants of these animals were subsequently used to start reintroduced populations, which now number about 40-50 Mexican wolves in Ar...
The failure of animals to fit all life-cycle stages into an annual cycle could reduce the chances of successful breeding. In some cases, non-optimal strategies will be adopted in order to maintain the life-cycle within the scope of one year. We studied trade-offs made by a High Arctic migrant shorebird, the red knot Calidris canutus islandica, between reproduction and wing feather molt carried ...
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