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Do relatives like to stay closer?: spatial organization and genetic relatedness in a mountain roe deer population

Biosa, Daniela and Grignolio, Stefano and Sica, Nicoletta and Pagon, Nives and Scandura, Massimo and Apollonio, Marco (2015) Do relatives like to stay closer?: spatial organization and genetic relatedness in a mountain roe deer population. Journal of Zoology, Vol. 296 (1), p. 30-37. eISSN 1469-7998. Article.

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DOI: 10.1111/jzo.12214

Abstract

The fine-scale genetic structure of mammal populations arises from the social and spatial behaviour of individuals. In wild ungulates gene flow is usually mediated by males, being the dispersing sex. The roe deer Capreolus capreolus represents an exception: males and females disperse in similar proportions as juveniles, but are subsequently mostly sedentary as adults, while mechanisms for inbreeding avoidance are more complex and not fully known. We investigated the seasonal variation in the relationship between genetic relatedness and spatial behaviour in a sample of 69 roe deer, monitored from 2002 to 2010 in a high-density population in Italy. Genetic and spatial analyses, based on individual positions, did not reveal any population structure, neither in the whole sample, nor in the two sexes separately. Our results are coherent with the absence of a sex bias in roe deer dispersal and suggest the existence of a high gene flow across a continuous forest habitat, thus preventing the onset of population structuring at a local scale. We found that genetic relatedness tended to increase with home range proximity, but mostly in winter. Nevertheless, when the extent of overlap between seasonal home ranges with respect to genetic relatedness was considered, males and females seemed to preferably share their home range with relatives of the same sex, reducing the overlap with relatives of the opposite sex during the rutting period. We conclude that home range rearrangements during the breeding season may afford a certain level of spatial segregation between closely related potential mates, thus reducing inbreeding risk.

Item Type:Article
ID Code:10993
Status:Published
Refereed:Yes
Uncontrolled Keywords:Capreolus capreolus, social organization, microsatellites, spatial behaviour, genetic structure
Subjects:Area 05 - Scienze biologiche > BIO/05 Zoologia
Divisions:001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Scienze della Natura e del Territorio
Publisher:Blackwell / Wiley
eISSN:1469-7998
Copyright Holders:© 2015 The Zoological Society of London
Deposited On:05 Jun 2015 12:50

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