Abstract
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 extent levels of genetic diversity currently exist in the remaining populations. Here we document temporal genetic diversity levels during the 2000–2006 interval for the last remaining breeding colony of oriental white-backed vultures in Pakistan, and show with simulations that a much larger captive population size is required than currently maintained to prevent further loss of genetic diversity. Before this species is extinct in the wild, it is crucial that additional individuals are included in the captive population.
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