Senn, Helen, Ghazali, Muhammad, Kaden, Jennifer, Barclay, David, Harrower, Ben, Campbell, R D, Macdonald, David W and Kitchener, Andrew C (2018) Distinguishing the victim from the threat: SNP‐based methods reveal the extent of introgressive hybridization between wildcats and domestic cats in Scotland and inform future in situ and ex situ management options for species restoration. Evolutionary applications. ISSN 1752-4571

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The degree of introgressive hybridization between the Scottish wildcat and domestic cat has long been suspected to be advanced. Here, we use a 35‐SNP‐marker test, designed to assess hybridization between wildcat and domestic cat populations in Scotland, to assess a database of 295 wild‐living and captive cat samples, and test the assumptions of the test using 3,097 SNP markers generated independently in a subset of the data using ddRAD. We discovered that despite increased genetic resolution provided by these methods, wild‐living cats in Scotland show a complete genetic continuum or hybrid swarm structure when judged against reference data. The historical population of wildcats, although hybridized, clearly groups at one end of this continuum, as does the captive population of wildcats. The interpretation of pelage scores against nuclear genetic data continues to be problematic. This is probably because of a breakdown in linkage equilibrium between wildcat pelage genes as the two populations have become increasingly mixed, meaning that pelage score or SNP score alone is poor diagnostic predictors of hybrid status. Until better tools become available, both should be used jointly, where possible, when making management decisions about individual cats. We recommend that the conservation community in Scotland must now define clearly what measures are to be used to diagnose a wildcat in the wild in Scotland, if future conservation action is to be effective.

Item Type: Article
Additional Information: Online Version of Record before inclusion in an issue
Uncontrolled Keywords: captive populations; carnivores; conservation management; invasive species
Subjects: A General Works > AS Academies and learned societies (General)
D History General and Old World > DA Great Britain
G Geography. Anthropology. Recreation > GE Environmental Sciences
Q Science > QL Zoology
Theme: Understanding the natural world
Department: Natural Sciences
Funders: Scottish Government Rural and Environment Science Analytical Services Division, Grant/Award Number: CR/2014/17, Heritage Lottery Fund, Royal Zoological Society of Scotland, Scottish Natural Heritage
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Depositing User: Ross Anderson
Date Deposited: 20 Dec 2018 12:06
Last Modified: 20 Dec 2018 12:06

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