Genetic diversity in fishes is influenced by habitat type and life‐history variation

Alexander S. Martinez; Janna R. Willoughby; Mark R. Christie

doi:10.1002/ece3.4661

journal article Open Access Nov 11, 2018

Genetic diversity in fishes is influenced by habitat type and life‐history variation

Alexander S. Martinez

Janna R. Willoughby

Mark R. Christie

Ecology and Evolution Vol. 8 No. 23 pp. 12022-12031 · Wiley

View at Publisher Save 10.1002/ece3.4661

Abstract

AbstractPopulations of fishes are increasingly threatened by over‐exploitation, pollution, habitat destruction, and climate change. In order to better understand the factors that can explain the amount of genetic diversity in wild populations of fishes, we collected estimates of genetic diversity (mean heterozygosity and mean rarefied number of alleles per locus) along with habitat associations, conservation status, and life‐history information for 463 fish species. We ran a series of phylogenetic generalized least squares models to determine which factors influence genetic diversity in fishes after accounting for shared evolutionary history among related taxa. We found that marine fishes had significantly higher genetic diversity than freshwater fishes with marine fishes averaging 11.3 more alleles per locus than their freshwater counterparts. However, contrary to our expectations, genetic diversity was not found to be lower in threatened versus not‐threatened fishes. Finally, we found that both age at maturity and fecundity were negatively related to genetic variation in both marine and freshwater fishes. Our results demonstrate that both life‐history characteristics and habitat play a role in shaping patterns of genetic diversity in fishes and should be considered when prioritizing species for conservation.

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References

Details

Published: Nov 11, 2018
Vol/Issue: 8(23)
Pages: 12022-12031
License: View

Authors

A

Alexander S. Martinez

Department of Biological Sciences Purdue University West Lafayette Indiana

J

Janna R. Willoughby

Department of Biological Sciences Purdue University West Lafayette Indiana; Department of Forestry and Natural Resources Purdue University West Lafayette Indiana

M

Mark R. Christie

Department of Biological Sciences Purdue University West Lafayette Indiana; Department of Forestry and Natural Resources Purdue University West Lafayette Indiana

Funding

Great Lakes Fishery Commission Award: 2016_CHR_54053

Department of Biological Sciences, Purdue University

Department of Forestry and Natural Resources, Purdue University

Cite This Article

Alexander S. Martinez, Janna R. Willoughby, Mark R. Christie (2018). Genetic diversity in fishes is influenced by habitat type and life‐history variation. Ecology and Evolution, 8(23), 12022-12031. https://doi.org/10.1002/ece3.4661

Genetic diversity in fishes is influenced by habitat type and life‐history variation

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