Restricted matrilineal gene flow and regional differentiation among Atlantic salmon (Salmo salar L.) populations within the Bay of Fundy, eastern Canada

Matrilineal phylogenetic divergence among Atlantic salmon stocks of the Bay of Fundy in south eastern Canada is investigated. Sequence variation in two regions of the mitochondrial ND1 gene, encompassing 710 base pairs, is described for 168 salmon from 11 rivers. Mean overall haplotype and nucleotid...

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Bibliographic Details
Published in:Heredity
Main Authors: Verspoor, E, O'Sullivan, M, Arnold, AL, Knox, D, Amiro, PG
Format: Article in Journal/Newspaper
Language:English
Published: 2002
Subjects:
Atlantic salmon
mitochondrial DNA
phylogeography
regional divergence
Canada
Salmo salar
Online Access:https://pure.uhi.ac.uk/en/publications/6400648e-7c87-4876-b3a5-9937344778b8
https://doi.org/10.1038/sj.hdy.6800166
Description
Summary:Matrilineal phylogenetic divergence among Atlantic salmon stocks of the Bay of Fundy in south eastern Canada is investigated. Sequence variation in two regions of the mitochondrial ND1 gene, encompassing 710 base pairs, is described for 168 salmon from 11 rivers. Mean overall haplotype and nucleotide diversity (h and pi) observed are 0.5014 and 0.00095, respectively. Nested clade analysis (NCA) and molecular analysis of variance (AMOVA) both point to highly restricted gene flow among rivers and show the haplotype distribution to be geographically structured. Variation among predefined regions of the Bay (16% ) is greater than among populations within these regions (14% ) The main regional differentiation occurs between rivers of the geographically isolated inner Minas Basin and those elsewhere in the Bay. Differentiation most probably reflects the pattern and nature of the historical processes associated with post-glacial colonisation of the area by salmon following the last Pleistocene glacial maximum c. 18000 yrs BP.

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