Download Conservation in the 21st Century: Gorillas as a Case Study by T.S. Stoinski, H. D. Steklis, P.T. Mehlman PDF

By T.S. Stoinski, H. D. Steklis, P.T. Mehlman

ISBN-10: 0387707204

ISBN-13: 9780387707204

This quantity identifies the first difficulties confronted in holding wild populations of gorillas all through Africa, pinpointing new methods to fixing those difficulties and outlining the elevated position that zoos can play in gorilla conservation. It comprises the in-depth services of box scientists in various disciplines to debate present conservation threats, novel methods to conservation, and capability options.

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Additional resources for Conservation in the 21st Century: Gorillas as a Case Study (Developments in Primatology: Progress and Prospects)

Sample text

6) and would not have represented the highest densities and abundances of Grauer’s gorillas at that time. Obviously, there are numerous caveats to this oversimplified comparison of two different measures of loss. First, Walsh and colleagues measured great apes together; there could easily be a differential decline between gorillas and chimpanzees. Second, and even more importantly, loss of occupancy range is not a good proxy measure for declines in abundance, since, in the remaining occupancy areas, the density of Grauer’s gorillas may have also declined significantly.

2. Threats to the Bwindi and Virunga Gorillas These are isolated island populations in upland areas surrounded by some of the highest human densities found on the African continent with extremely poor, agricultural-based local economies. ). While these gorillas are no longer hunted for their meat in this region, they are, however, the focus of illegal animal trafficking. This threat, in which members of a group are killed and wounded (with the group sometimes disintegrating as a result) in an effort to trap an infant for the black market, is particularly severe for the Virunga population.

These sources of bias are present in all transect methodologies even before we consider adjustments based on misidentifying chimpanzee nests or the inability to detect immatures not making nests. 7. Summary of Case Study As this case study of Grauer’s gorillas demonstrates, there are many sources of error associated with estimates of gorilla distribution and abundance. With respect to gorilla distribution, we have seen that studies have a tendency to focus on areas where their surveys occurred, but in combining their findings with other studies in review-oriented articles, there is a tendency to over-extrapolate distribution in their study zone, while under-representing distributions outside their study zone, probably due to incomplete knowledge of other zones or a reliance on questionable results from other surveys.

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