Abstract:
:Although poaching (illegal killing) is an important cause of death for large carnivores globally, the effect of lethal management policies on poaching is unknown for many populations. Two opposing hypotheses have been proposed: liberalizing killing may decrease poaching incidence ('tolerance hunting') or increase it ('facilitated poaching'). For gray wolves in Wisconsin, USA, we evaluated how five causes of death and disappearances of monitored, adult wolves were influenced by policy changes. We found slight decreases in reported wolf poaching hazard and incidence during six liberalized killing periods, but that was outweighed by larger increases in hazard and incidence of disappearance. Although the observed increase in the hazard of disappearance cannot be definitively shown to have been caused by an increase in cryptic poaching, we discuss two additional independent lines of evidence making this the most likely explanation for changing incidence among n = 513 wolves' deaths or disappearances during 12 replicated changes in policy. Support for the facilitated poaching hypothesis suggests the increase (11-34%) in disappearances reflects that poachers killed more wolves and concealed more evidence when the government relaxed protections for endangered wolves. We propose a refinement of the hypothesis of 'facilitated poaching' that narrows the cognitive and behavioral mechanisms underlying wolf-killing.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Santiago-Ávila FJ,Chappell RJ,Treves Adoi
10.1038/s41598-020-70837-xsubject
Has Abstractpub_date
2020-08-17 00:00:00pages
13881issue
1issn
2045-2322pii
10.1038/s41598-020-70837-xjournal_volume
10pub_type
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