By Yanyan Dong
This e-book provides the findings of the learn, and provides research of either its methodological and policy-related implications. at the technique part, it assesses and validates the valuation workshop strategy; appraises the impression of distance on willingness to pay and the impression of the respondents’ skill to pay. From a coverage viewpoint, the e-book examines the attitudes and choice of respondents on trade-offs among monetary development and ecological use.
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Extra resources for Contingent Valuation of Yangtze Finless Porpoises in Poyang Lake, China
Naito, Y. (2002). Diving behavior of freshwater finless porpoises (Neophocaena phocaenoides) in an oxbow of the Yangtze River. ICES Journal of Marine Science, 59, 438–443. Amano, M. (2002). Finless porpoise (Neophocoena phocaenoides). In W. F. Perrin, R. B. Wursig, & J. G. M. ), Encyclopedia of marine mammals (pp. 432–435). San Diego: Academic. , & Groombridge, B. ). (1996). 1996 IUCN red list of threatened animals. Gland: IUCN. , & Pfluger, A. (2006, May 24). The pilot Yangtze freshwater dolphin expedition report.
High density dredging projects have been the principal cause of the death of the local wildlife population, including the YFPs. Sand mining increases the turbidity of lake water, so that the porpoises cannot see as far they once could and have to rely on their highly-developed sonar systems to avoid obstacles and to search food. Large ships enter and leave the lake at the rate of two a minute and such a high density of shipping causes great noise pollution. The YFPs’ sonar systems are badly disturbed by this, as it means that they have difficulty hearing their food and escaping from danger, and also cannot swim freely from one bank to the other (Zhang 2007).
02 porpoise/km at present, which indicates that the YFPs in this section appear to be at the highest risk of disappearing. If the porpoises in this subsection were to die off, the habitat range of YFPs would shrink by 400 km, or about 24 % (Zhao et al. 2008). The last survey in the section between Wuhan and Yueyang, as the one between Dongting Lake and Poyang Lake (Barrett et al. 085 individual/km, respectively. Additionally, the observations conducted in 2005–2006 indicated that the density of the YFPs in Poyang Lake is considerably higher than that in the adjacent section of the Yangtze River (Wang et al.