Conservation Genetics of Clinch Dace Chrosomus sp. cf. saylori

Clinch Dace (Chrosomus sp. cf. saylori) is a newly recognized and yet-undescribed species of minnow with a restricted and fragmented distribution in the upper Tennessee River basin in southwestern Virginia, USA. We collected Clinch Dace from seven streams and observed variations at nine selectively...

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Bibliographic Details
Published inFishes Vol. 8; no. 7; p. 365
Main Authors Bourquin, Rebecca, Moore, Michael J., Orth, Donald J., Hallerman, Eric M.
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.07.2023
Subjects
Alleles
Bayesian analysis
Bayesian theory
Chrosomus
Cluster analysis
Coefficients
Conservation
Conservation genetics
Creeks & streams
DNA
effective population size
Endangered & extinct species
Genetic analysis
genetic differentiation
Genetic divergence
Genetic drift
Genetic processes
genetic variation
Genetics
Inbreeding
management units
Markov analysis
microsatellite repeats
Microsatellites
minnows
Population genetics
Probability theory
River basins
Tennessee River
variance
Virginia
watersheds
Wildlife conservation
United States > US
Virginia
Clinch River
Tennessee River
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Summary:Clinch Dace (Chrosomus sp. cf. saylori) is a newly recognized and yet-undescribed species of minnow with a restricted and fragmented distribution in the upper Tennessee River basin in southwestern Virginia, USA. We collected Clinch Dace from seven streams and observed variations at nine selectively neutral microsatellite DNA loci to infer population genetic processes and identify units for conservation management. Bayesian cluster analysis showed that three of the seven surveyed populations were genetically distinct, while the other four populations showed signs of recent admixture. Estimated effective population sizes and m-ratios were low within most populations, suggesting loss of alleles due to recent genetic drift. Positive FIS values, high average individual inbreeding coefficients, and high degrees of inferred relatedness among individuals suggested that inbreeding is taking place in some populations. FST values were high, and analysis of molecular variance indicated genetic divergence among populations. These indicators suggest that Clinch Dace populations are subject to the genetic processes that are characteristic of small and isolated populations.
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ISSN:2410-3888
2410-3888
DOI:10.3390/fishes8070365