2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/24/2018 | 2:00 PM - 2:15 PM | ASSESSMENT OF GENETIC DIVERSITY AND STRUCTURE AMONG POPULATIONS OF EPIOBLASMA TRIQUETRA (BIVALVIA: UNIONIDAE) IN THE LAURENTIAN GREAT LAKES WATERSHED | 410 A
ASSESSMENT OF GENETIC DIVERSITY AND STRUCTURE AMONG POPULATIONS OF EPIOBLASMA TRIQUETRA (BIVALVIA: UNIONIDAE) IN THE LAURENTIAN GREAT LAKES WATERSHED
The endangered freshwater mussel Epioblasma triquetra (Snuffbox) has the largest distribution of any other species in its critically imperiled genus. The Great Lakes populations of E. triquetra are among the most important remaining strongholds for this species. Using eight polymorphic microsatellite loci, this study examined the genetic diversity and structure of E. triquetra (n = 234) at twelve locations where they are known to be extant in the Great Lakes region. Genetic structure followed the geographic distribution of sampling locations in the three regions sampled: the Green Bay drainage; the Grand River drainage, Michigan; and the Huron-Erie corridor, USA and Canada. The genetic structure found is likely due to three separate post-glacial colonization events by E. triquetra into the Great Lakes. Only one of the twelve sampling locations (Embarrass River, WI) showed evidence of a recent bottleneck and no populations showed evidence of significant inbreeding. The strong large-scale pattern of genetic structure and diversity observed for E. triquetra in the Great Lakes region suggests that conservation efforts and management decisions should take genetic profiles into context before facilitating admixture among populations via translocations and/or hatchery propagation of juveniles.
- Population
- Great Lakes
- Conservation
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Presenters/Authors
Caitlin Beaver
(), Central Michigan University, beave1c@cmich.edu;
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Daelyn A. Woolnough
(), Central Michigan University, wooln1d@cmich.edu;
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David T. Zanatta
(), Central Michigan University, zanat1d@cmich.edu;
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