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Living on the edge: assessing the extinction risk of critically endangered Bonelli's eagle in Italy.

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Living on the edge: assessing the extinction risk of critically endangered Bonelli's eagle in Italy.

dc.contributor.author	López López, Pascual
dc.contributor.author	Sarà, Maurizio
dc.contributor.author	Di Vittorio, M.
dc.date.accessioned	2020-04-08T17:03:24Z
dc.date.available	2020-04-08T17:03:24Z
dc.date.issued	2012
dc.identifier.citation	López López, Pascual Sarà, Maurizio Di Vittorio, M. 2012 Living on the edge: assessing the extinction risk of critically endangered Bonelli's eagle in Italy. Plos One 7 5 e37862
dc.identifier.uri	https://hdl.handle.net/10550/73850
dc.description.abstract	Background The population of Bonelli's eagle (Aquila fasciata) has declined drastically throughout its European range due to habitat degradation and unnatural elevated mortality. There are less than 1500 breeding pairs accounted for in Europe, and the species is currently catalogued as Critically Endangered in Italy, where the 22 territories of Sicily, represent nearly 95% of the entire Italian population. However, despite national and European conservation concerns, the species currently lacks a specific conservation plan, and no previous attempts to estimate the risk of extinction have been made. Methodology/Principal Findings We incorporated the most updated demographic information available to assess the extinction risk of endangered Bonelli's eagle in Italy through a Population Viability Analysis. Using perturbation analyses (sensitivity and elasticity), and a combination of demographic data obtained from an assortment of independent methods, we evaluated which demographic parameters have more influence on the population's fate. We also simulated different scenarios to explore the effects of possible management actions. Our results showed that under the current conditions, Bonelli's eagle is expected to become extinct in Italy in less than 50 years. Stand-alone juvenile mortality was the most critical demographic parameter with the strongest influence on population persistence with respect to other demographic parameters. Measures aimed at either decreasing juvenile mortality, adult mortality or decreasing both juvenile and adult mortality resulted in equivalent net positive effects on population persistence (population growth rate λ>1). In contrast, changes aimed at increasing breeding success had limited positive effects on demographic trends. Conclusions/Significance Our PVA provides essential information to direct the decision-making process and exposes gaps in our previous knowledge. To ensure the long-term persistence of the species in Italy, measures are urgently needed to decrease both adult mortality due to poaching and juvenile mortality due to nest plundering, the top ranking mortality causes.
dc.language.iso	eng
dc.relation.ispartof	Plos One, 2012, vol. 7, num. 5, p. e37862
dc.subject	Zoologia
dc.subject	Biodiversitat
dc.subject	Biologia
dc.title	Living on the edge: assessing the extinction risk of critically endangered Bonelli's eagle in Italy.
dc.type	journal article	es_ES
dc.date.updated	2020-04-08T17:03:24Z
dc.identifier.doi	10.1371/journal.pone.0037862
dc.identifier.idgrec	137054
dc.rights.accessRights	open access	es_ES