Long-term species balance in sympatric populations: implications for Atlantic salmon and brown trout

The factors determining regional adaptation in salmonids are still unclear, but it is known that changes in their habitat imply changes in their population structure. In this preliminary study we integrate habitat data, molecular analyses (from both nuclear microsatellite and mitochondrial loci) and...

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Bibliographic Details
Published in:Frontiers of biogeography 2014-09, Vol.6 (3)
Main Authors: Horreo, Jose Luis, Turrero, Pablo, Perez, Juliana, García-Vázquez, Eva
Format: Article
Language:English
Subjects:
archaeological vertebrae
biogeography
demography
life-history traits
Salmo salar
Salmo trutta
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Summary:The factors determining regional adaptation in salmonids are still unclear, but it is known that changes in their habitat imply changes in their population structure. In this preliminary study we integrate habitat data, molecular analyses (from both nuclear microsatellite and mitochondrial loci) and life-history traits (measured on archaeological vertebrae and modern scales) of two sympatric salmonid species: Atlantic salmon and brown trout. We propose that water temperature and geological characteristics changed the biogeographic patterns of these species through asymmetric migration and different (but complementary) population growth rates. As a consequence, differences in a life-history trait (mean number of years at sea) and population sizes were detected between regions, suggesting a process of substitution of Atlantic salmon by brown trout.
ISSN:1948-6596
1948-6596
DOI:10.21425/F56322565