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Trends in numbers of petrels attracted to artificial lights suggest population declines in Tenerife, Canary Islands

AuthorsRodríguez, Airam ; Rodríguez, Beneharo; Lucas, Matthew P.
KeywordsCanary Islands
light pollution
population size
rescue campaigns
Issue DateJan-2012
PublisherBritish Ornithologists' Union
CitationIbis Volume 154, Issue 1, pages 167–172, January 2012
AbstractThe secretive breeding behaviour of petrels makes monitoring their breeding populations challenging. To assess population trends of Cory’s Shearwater Calonectris diomedea, Bulwer’s Petrel Bulweria bulwerii and Macaronesian Shearwater Puffinus baroli in Tenerife from 1990 to 2010, we used data from rescue campaigns that aim to reduce the mortality of fledgling petrels attracted to artificial lights as proxies for trends in breeding population size. Despite increases in human population size and light pollution, the number of rescued fledglings of Cory’s Shearwater and Bulwer’s Petrel increased and remained stable, respectively, whereas numbers of rescued Macaronesian Shearwaters sharply declined. In the absence of more accurate population estimates, these results suggest a worrying decline in the Macaronesian Shearwater’s breeding population.
Publisher version (URL)http://onlinelibrary.wiley.com/doi/10.1111/j.1474-919X.2011.01175.x/pdf
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