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

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

ISBN-10: 0387707204

ISBN-13: 9780387707204

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

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

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Importantly, many of these sources of error creep into our calculations even before statistical confidence interval limits are calculated. Thus, no amount of 20 Patrick T. , 1998a) can make abundance estimates and their confidence intervals any more precise when the original counts are modified upward by tens of percent to represent misidentified chimpanzee nests or to estimate the number of uncounted juveniles and infants that do not make nests. In gorilla conservation, we seem to be confronted with the problem that our western culture demands numbers, and our constituencies and the public need a “sound bite”: a number of gorillas that we believe exist in an area.

7. , 2003) demonstrating a great ape population loss of 56% between 1983 and 2000. Walsh and colleagues indicate 95% confidence intervals of between 30% and 70% decline; thus the range for a current abundance estimate falls between 31,483 and 66,226 individuals (2005a and 2005b). , 2003), a total minimum abundance estimate for Western lowland gorillas in 2005 could be as low as 27,000 individuals (2005c). 7% per annum loss) to show that the oft-quoted abundance estimate of 100,000 might have been applicable in 1987–1988, but is certainly not the case today.

For example, the percentage loss of forest from 1990 to 2000 for Cameroon, Central African Republic, Republic of Congo, Equatorial Guinea, and Gabon together was 3%, representing close to 3 million hectares of mature forest,10 with Cameroon and Equatorial Guinea leading the list with 11% and 6%, respectively. As Harcourt (1966) indicates, these rates of decline do not even capture the effects of selective logging but only losses of the larger tracts of forest. These rapid rates of deforestation appear to be linked to increases in human density and hostcountry economies, particularly their foreign debt (Harcourt, 1966; Barnes, 1990).

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Conservation in the 21st Century: Gorillas as a Case Study (Developments in Primatology: Progress and Prospects) by T.S. Stoinski, H. D. Steklis, P.T. Mehlman

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