| Summary: | A long-held, but poorly tested, assumption in natural populations is that individuals that disperse into new areas for reproduction are at a disadvantage compared to individuals that reproduce in their natal habitat, underpinning the eco-evolutionary processes of local adaptation and ecological speciation. Here, we capitalize on fine-scale population structure and natural dispersal events to compare the reproductive success of local and dispersing individuals captured on the same spawning ground in four consecutive parent-offspring cohorts of wild Atlantic salmon (Salmo salar). Parentage analysis conducted on adults and juvenile fish showed that local females and males had 9.6 and 2.9 times higher reproductive success than dispersers, respectively. Our results reveal how higher reproductive success in local spawners compared to dispersers may act in natural populations to drive population divergence and promote local adaptation over microgeographic spatial scales without clear morphological differences between populations. AdultsThis file contains all phenotypic and reproductive success data, and population assignment details for each individual adult salmon sampled at the main study site, lower Utsjoki, over for cohort years (2011-15), and the secondary site, Akujoki, for 2011 cohort year.Microsatellite genotypesThis file contains all microsatellite genotype data for adults and offspring used in parentage assignments, for all years and sampling locations. Microsatellite loci are listed in two columns, (a) for the first allele and (b) for the second allele.Genotypes.csvMateChoiceThis file contains data for each pair of adults identified from offspring parentage assignments as having mated together. These data were used to test for assortative mating and other aspects of mate choice.Parentage AssignmentsThis file contains the output of the pedigree fit, i.e. parentage assignments, for all sampled offspring. For ease of interpretation, the origin (local or disperser) and the natal population of the mother and ...
|
|---|