The genetic structure of fish: differences in the intraspecific distribution of biochemical genetic variation between marine, anadromous, and freshwater species

The genetic structure of fish: differences in the intraspecific distribution of biochemical... Biochemical genetic markers have been increasingly used for inferences on the population genetic structure of various fish, but little attention has been paid to relative differences in the distribution of variability within species in different groups of fish. Nested gene diversity analyses of multiple locus electrophoretic data from the literature for 19 species (6 marine species, 4 anadromous salmonids, and 9 freshwater species (5 salmonids)), mainly from Scandinavia and North America, show that (i) average heterozygosity is higher in marine species than in freshwater species, (ii) the average fraction of the total gene diversity allocated between localities increases in the order marine (1.6%), anadromous (3.7%), and freshwater species (29.4%), and (iii) the fraction of the total gene diversity associated with differences between geographic clusters of localities is generally smaller than that between localities within clusters. This finding is consistent with that the differentiation observed in most species is of postglacial origin, and that the timespan available since deglaciation has been too short to result in the accumulation of substantial differences between clusters. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Fish Biology Wiley

The genetic structure of fish: differences in the intraspecific distribution of biochemical genetic variation between marine, anadromous, and freshwater species

Journal of Fish Biology, Volume 26 (6) – Jun 1, 1985

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Publisher
Wiley
Copyright
Copyright © 1985 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0022-1112
eISSN
1095-8649
DOI
10.1111/j.1095-8649.1985.tb04309.x
Publisher site
See Article on Publisher Site

Abstract

Biochemical genetic markers have been increasingly used for inferences on the population genetic structure of various fish, but little attention has been paid to relative differences in the distribution of variability within species in different groups of fish. Nested gene diversity analyses of multiple locus electrophoretic data from the literature for 19 species (6 marine species, 4 anadromous salmonids, and 9 freshwater species (5 salmonids)), mainly from Scandinavia and North America, show that (i) average heterozygosity is higher in marine species than in freshwater species, (ii) the average fraction of the total gene diversity allocated between localities increases in the order marine (1.6%), anadromous (3.7%), and freshwater species (29.4%), and (iii) the fraction of the total gene diversity associated with differences between geographic clusters of localities is generally smaller than that between localities within clusters. This finding is consistent with that the differentiation observed in most species is of postglacial origin, and that the timespan available since deglaciation has been too short to result in the accumulation of substantial differences between clusters.

Journal

Journal of Fish BiologyWiley

Published: Jun 1, 1985

References

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