Abstract:
:Dispersal is an important mechanism used to avoid inbreeding. However, dispersal may only be effective for part of an individual's lifespan since, post-dispersal individuals that breed over multiple reproductive events may risk mating with kin of the philopatric sex as they age. We tested this hypothesis in black grouse Tetrao tetrix, and show that yearling females never mated with close relatives whereas older females did. However, matings were not with direct kin suggesting that short-distance dispersal to sites containing kin and subsequent overlap of reproductive lifespans between males and females were causing this pattern. Chick mass was lower when kinship was high, suggesting important fitness costs associated with inbred matings. This study shows that increased inbreeding risk might be a widespread yet rarely considered cost of ageing.
journal_name
Biol Lettjournal_title
Biology lettersauthors
Soulsbury CD,Alatalo RV,Lebigre C,Rokka K,Siitari Hdoi
10.1098/rsbl.2011.0379subject
Has Abstractpub_date
2011-12-23 00:00:00pages
853-5issue
6eissn
1744-9561issn
1744-957Xpii
rsbl.2011.0379journal_volume
7pub_type
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