Influence of genetic dissimilarity in the reproductive success and mate choice of brown trout – females fishing for optimal MHC dissimilarity
2007 (English)In: Journal of Evolutionary Biology, ISSN 1010-061X, E-ISSN 1420-9101, Vol. 20, no 5, 1859-1869 p.Article in journal (Refereed) Published
We examined the reproductive success of 48 adult brown trout (Salmo trutta L.) which were allowed to reproduce in a stream that was controlled for the absence of other trout. Parentage analyses based on 11 microsatellites permitted us to infer reproductive success and mate choice preferences in situ. We found that pairs with intermediate major histocompatibility complex (MHC) dissimilarity mated more often than expected by chance. It appears that female choice was the driving force behind this observation because, compared with other individuals, males with intermediate MHC dissimilarity produced a larger proportion of offspring, whereas female reproductive output did not show this pattern. Hence, rather than seeking mates with maximal MHC dissimilarity, as found in several species, brown trout seemed to prefer mates of intermediate MHC difference, thus supporting an optimality-based model for MHC-dependent mate choice.
Place, publisher, year, edition, pages
2007. Vol. 20, no 5, 1859-1869 p.
brown trout, disassortative mating, mate choice, MHC class IIβ, microsatellite, optimal outbreeding, reproductive output, reproductive success, Salmo trutta
IdentifiersURN: urn:nbn:se:uu:diva-97245DOI: 10.1111/j.1420-9101.2007.01380.xISI: 000249166200022PubMedID: 17714303OAI: oai:DiVA.org:uu-97245DiVA: diva2:172100