Complex postglacial recolonization inferred from population genetic structure of mottled sculpinCottus bairdiiin tributaries of eastern Lake Michigan, U.S.A.
Gene Flow
0106 biological sciences
Michigan
Fishes
Genetic Variation
DNA, Mitochondrial
01 natural sciences
Perciformes
Lakes
Phylogeography
Genetics, Population
Rivers
Animals
14. Life underwater
Microsatellite Repeats
DOI:
10.1111/jfb.13101
Publication Date:
2016-09-12T08:12:57Z
AUTHORS (4)
ABSTRACT
This study used analyses of the genetic structure of a non‐game fish species, the mottled sculpinCottus bairdiito hypothesize probable recolonization routes used by cottids and possibly other Laurentian Great Lakes fishes following glacial recession. Based on samples from 16 small streams in five major Lake Michigan, U.S.A., tributary basins, significant interpopulation differentiation was documented (overallFST= 0·235). Differentiation was complex, however, with unexpectedly high genetic similarity among basins as well as occasionally strong differentiation within basins, despite relatively close geographic proximity of populations. Genetic dissimilarities were identified between eastern and western populations within river basins, with similarities existing between eastern and western populations across basins. Given such patterns, recolonization is hypothesized to have occurred on three occasions from more than one glacial refugium, with a secondary vicariant event resulting from reduction in the water level of ancestral Lake Michigan. By studying the phylogeography of a small, non‐game fish species, this study provides insight into recolonization dynamics of the region that could be difficult to infer from game species that are often broadly dispersed by humans.
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