Winter Flounder Larval Genetic Population Structure in Narragansett Bay,RI: Recruitment to Juvenile Young-of-the-Year |
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| Authors: | Larry Buckley Jeremy Collie Lisa A E Kaplan Joseph Crivello |
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| Institution: | (1) Graduate School of Oceanography, University of Rhode Island, 230 Coastal Road, Narragansett, RI 02882, USA;(2) School of Health Sciences, Quinnipiac University, 275 Mount Carmel Ave., Hamden, CT 06518-1908, USA;(3) Physiology and Neurobiology, University of Connecticut, Room 633, 75 North Eagleville Rd., Storrs, CT 06269-3156, USA |
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| Abstract: | The genetic population structure of winter flounder larvae was examined in Narragansett Bay, RI. Winter flounder larvae collected
from 20 stations within Narragansett Bay and one station outside of the Bay were analyzed for six microsatellite loci. When
analyzed by geographic collection sites, there were 16 distinct genetic populations of winter flounder larvae (R
ST values from 0.1 to 0.6). The presence of distinct genetic populations was supported by assignment of individual larvae to
populations by Bayesian analysis. Bayesian analysis resulted in 14 distinct genetic populations that overlapped with the geographically
distributed populations (R
ST values from 0.1 to 0.6). Young-of-the-year juveniles collected in the same year as the larvae were also analyzed at the same
six microsatellite loci. Juveniles were assigned to larvae populations by both a Bayesian approach and a neural network approach.
Juveniles collected from within Narragansett Bay were found to arise from geographically adjacent Narragansett Bay winter
flounder larval populations (>99%), suggesting no widespread movement of juveniles away from spawning grounds. These results
are discussed in the context of winter flounder population biology in Narragansett Bay, RI. |
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