Population genomics and environmental adaptation in the sea scallop, Placopecten magellanicus, detected using RAD-seq derived SNPs and experimental larval rearing

Wyngaarden, Mallory Van (2017) Population genomics and environmental adaptation in the sea scallop, Placopecten magellanicus, detected using RAD-seq derived SNPs and experimental larval rearing. Masters thesis, Memorial University of Newfoundland.

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Abstract

Understanding the scale of connectivity and adaptation among marine populations can inform fisheries conservation and management. We used a combination of advanced genomic techniques and experimental methods to determine the scale of connectivity and adaptation in the sea scallop, Placopecten magellanicus. Restriction-site Associated DNA sequencing genotyped 7163 SNPs in 245 individuals across 12 populations in the Northwest Atlantic. Subsequent analysis of these data identified a strong separation between populations north and south of Nova Scotia and identified an association between population structure and the coldest temperatures experienced by scallop populations. Common garden experiments on a northern and southern populations found that larvae from the north grew more quickly overall, potentially an adaptive strategy to the northern winter. These observations contribute to growing evidence of fine-scale population structure and adaptation in marine systems and support the hypothesis that a combination of limited dispersal and adaptive differentiation drives sea scallop population structure.

Item Type: Thesis (Masters)
URI: http://research.library.mun.ca/id/eprint/12538
Item ID: 12538
Additional Information: Includes bibliographical references (pages 127-140).
Keywords: sea scallop, RAD-seq, population genomics, landscape genomics, connectivity, single nucleotide polymorphism, adaptation, larval rearing, population structure, dispersal
Department(s): Science, Faculty of > Biology
Date: January 2017
Date Type: Submission
Library of Congress Subject Heading: Placopecten magellanicus -- Genetics -- Nova Scotia; Animal population genetics

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