Abundance of blue whales off Chile from the 1997/98 SOWER survey

 

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dc.contributor.author Branch, Trevor A
dc.contributor.author Zerbini, Alexandre N
dc.contributor.author Findlay, Ken
dc.date.accessioned 2016-03-11T13:13:31Z
dc.date.available 2016-03-11T13:13:31Z
dc.date.issued 2007
dc.identifier.citation Branch, T. A., Zerbini, A. N., & Findlay, K. (2007). Abundance of blue whales off Chile from the 1997/98 SOWER survey. IWC Paper. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/17641
dc.description.abstract The 1997/98 SOWER survey in Chile searched the region from 18°30′S to 38°S. Although the primary intention of the surveys was to maximize blue whale encounters, survey coverage was sufficient to estimate abundance using line transect methods. The baseline abundance estimate, excluding transit legs, was 452 (CV = 0.56, 95% CI: 160–1300). This abundance estimate is negatively biased because inshore regions including Chiloé Island and the Gulf of Corcovado, where blue whales are now known to aggregate, were outside the survey area. If it is conservatively assumed that the baseline estimate applied to the entire population, then the population was at a minimum of 7–23% of pre-exploitation levels in 1997. en_ZA
dc.language eng en_ZA
dc.subject blue whales en_ZA
dc.subject Chile en_ZA
dc.subject 1997/98 SOWER survey en_ZA
dc.title Abundance of blue whales off Chile from the 1997/98 SOWER survey en_ZA
dc.type Working Paper en_ZA
dc.date.updated 2016-03-08T09:07:37Z
uct.type.publication Research en_ZA
uct.type.resource Discussion paper en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Marine Resource Assessment and Management Group en_ZA
uct.type.filetype Text
uct.type.filetype Image


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