Journal
MOLECULAR ECOLOGY
Volume 19, Issue 19, Pages 4228-4241Publisher
WILEY
DOI: 10.1111/j.1365-294X.2010.04806.x
Keywords
amplified fragment length polymorphism; dispersal; isolation by distance; marine fish; microsatellites
Funding
- NSERC
- Canadian Department of Fisheries and Oceans Biotechnology Strategy
- Dalhousie Graduate Scholarship
- Patrick Lett Funding
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Genetic variation was assessed in Atlantic wolffish, Anarhichas lupus, across the North Atlantic Ocean using microsatellite and amplified fragment length polymorphism (AFLP) markers. Despite unusual life history attributes such as large benthic eggs, large larvae, a limited pelagic stage and relatively sedentary adults, which suggest potential for strong population structure, range-wide F-ST values were comparable to other marine fishes (< 0.035). Nevertheless, both significant genetic differentiation among regions and isolation by distance were observed, suggesting limited dispersal in this species. AFLP loci, evaluated on a subset of samples, revealed slightly higher F-ST values, but similar patterns of differentiation and isolation-by-distance estimates, compared to microsatellites. The genetic structure of Atlantic wolffish has likely been shaped by its post-glacial history of recolonization, North Atlantic current patterns and continuity of habitat on continental shelves.
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