Alternative reproductive tactics increase effective population size and decrease inbreeding in wild Atlantic salmon
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چکیده
منابع مشابه
Alternative reproductive tactics increase effective population size and decrease inbreeding in wild Atlantic salmon
While nonanadromous males (stream-resident and/or mature male parr) contribute to reproduction in anadromous salmonids, little is known about their impacts on key population genetic parameters. Here, we evaluated the contribution of Atlantic salmon mature male parr to the effective number of breeders (Nb) using both demographic (variance in reproductive success) and genetic (linkage disequilibr...
متن کاملDifferential reproductive success and heritability of alternative reproductive tactics in wild Atlantic salmon (Salmo salar L.).
A critical step in understanding the evolution and maintenance of alternative reproductive tactics is to obtain accurate comparisons of their fitness and to determine factors influencing individual status. In this study, we first used individual multilocus genotypic information to compare reproductive success between two alternative reproductive tactics of anadromous Atlantic salmon (Salmo sala...
متن کاملGenetic variation in threshold reaction norms for alternative reproductive tactics in male Atlantic salmon, Salmo salar.
Alternative reproductive tactics may be a product of adaptive phenotypic plasticity, such that discontinuous variation in life history depends on both the genotype and the environment. Phenotypes that fall below a genetically determined threshold adopt one tactic, while those exceeding the threshold adopt the alternative tactic. We report evidence of genetic variability in maturation thresholds...
متن کاملThe genetic basis of early-life morphological traits and their relation to alternative male reproductive tactics in Atlantic salmon.
Although heritability estimates for traits potentially under natural selection are increasingly being reported, their estimation remains a challenge if we are to understand the patterns of adaptive phenotypic change in nature. Given the potentially important role of selection on the early life phenotype, and thereby on future life history events in many fish species, we conducted a common garde...
متن کاملAn examination of genetic diversity and effective population size in Atlantic salmon populations.
Effective population size (Ne) is an important parameter in the conservation of genetic diversity. Comparative studies of empirical data that gauge the relative accuracy of Ne methods are limited, and a better understanding of the limitations and potential of Ne estimators is needed. This paper investigates genetic diversity and Ne in four populations of wild anadromous Atlantic salmon (Salmo s...
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ژورنال
عنوان ژورنال: Evolutionary Applications
سال: 2014
ISSN: 1752-4571,1752-4571
DOI: 10.1111/eva.12172