A field reciprocal transplant experiment reveals asymmetric costs of migration between lake and river ecotypes of three-spined sticklebacks (Gasterosteus aculeatus).

Détails

ID Serval
serval:BIB_3F66C7719513
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
A field reciprocal transplant experiment reveals asymmetric costs of migration between lake and river ecotypes of three-spined sticklebacks (Gasterosteus aculeatus).
Périodique
Journal of Evolutionary Biology
Auteur(s)
Kaufmann J., Lenz T.L., Kalbe M., Milinski M., Eizaguirre C.
ISSN
1420-9101 (Electronic)
ISSN-L
1010-061X
Statut éditorial
Publié
Date de publication
2017
Peer-reviewed
Oui
Volume
30
Numéro
5
Pages
938-950
Langue
anglais
Résumé
Theory of local adaptation predicts that nonadapted migrants will suffer increased costs compared to local residents. Ultimately this process can result in the reduction of gene flow and culminate in speciation. Here, we experimentally investigated the relative fitness of migrants in foreign habitats, focusing on diverging lake and river ecotypes of three-spined sticklebacks. A reciprocal transplant experiment performed in the field revealed asymmetric costs of migration: whereas mortality of river fish was increased under lake conditions, lake migrants suffered from reduced growth relative to river residents. Selection against migrants thus involved different traits in each habitat but generally contributed to bidirectional reduction in gene flow. Focusing particularly on the parasitic environments, migrant fish differed from resident fish in the parasite community they harboured. This pattern correlated with both cellular phenotypes of innate immunity as well as with allelic variation at the genes of the major histocompatibility complex. In addition to showing the costs of migration in three-spined sticklebacks, this study highlights the role of asymmetric selection particularly from parasitism in genotype sorting and in the emergence of local adaptation.

Mots-clé
Animal Migration, Animals, Ecosystem, Ecotype, Lakes, Rivers, Smegmamorpha, ecotype, immigrant inviability, local adaptation, parasite, reproductive isolation, stickleback
Pubmed
Web of science
Création de la notice
28/02/2017 20:35
Dernière modification de la notice
03/03/2018 16:25
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