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Shoot, shovel and shut up: cryptic poaching slows restoration of a large carnivore in Europe

Liberg, Olof; Chapron, Guillaume; Wabakken, Petter; Pedersen, Hans Christian; Hobbs, N. Thompson; Sand, Håkan
Journal article, Peer reviewed
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Liberg.pdf (395.6Kb)
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http://hdl.handle.net/11250/134548
Utgivelsesdato
2012
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  • Artikkel - fagfellevurdert vitenskapelig / Articles - peer-reviewed [2295]
Originalversjon
Liberg, O., Chapron, G., Wabakken, P., Pedersen, H.-C., Hobbs, N. T., & Sand, H. (2012). Shoot, shovel and shut up: cryptic poaching slows restoration of a large carnivore in Europe. Proceedings of the Royal Society of London. Biological Sciences, 279(1730), 910-915. doi: http://dx.doi.org10.1098/rspb.2011.1275   10.1098/rspb.2011.1275
Sammendrag
Poaching is a widespread and well-appreciated problem for the conservation of many threatened species. Because poaching is illegal, there is strong incentive for poachers to conceal their activities, and consequently, little data on the effects of poaching on population dynamics are available. Quantifying poaching mortality should be a required knowledge when developing conservation plans for endangered species but is hampered by methodological challenges. We show that rigorous estimates of the effects of poaching relative to other sources of mortality can be obtained with a hierarchical state–space model

combined with multiple sources of data. Using the Scandinavian wolf (Canis lupus) population as an

illustrative example, we show that poaching accounted for approximately half of total mortality and more than two-thirds of total poaching remained undetected by conventional methods, a source of mortality we term as ‘cryptic poaching’. Our simulations suggest that without poaching during the past decade, the population would have been almost four times as large in 2009. Such a severe impact of poaching on population recovery may be widespread among large carnivores. We believe that conservation strategies for large carnivores considering only observed data may not be adequate and should be revised by including and quantifying cryptic poaching.
Beskrivelse
The updated version of the article will always be available here: http://rspb.royalsocietypublishing.org/content/279/1730/910.full.pdf+html
Utgiver
The Royal Society
Tidsskrift
Proceedings of the Royal Society of London. Biological Sciences

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