Abstract
Despite long planktonic durations, many species of broadcast spawning invertebrates exhibit genetic structure at small spatial and temporal scales. Amplified fragment length polymorphisms were used to assess genetic variation in the sea scallop, Placopecten magellanicus, among four inshore and one offshore location in the Gulf of Maine and temporal genetic variation among age classes of sea scallops at one site. Our results indicated that genetic structure for P. magellanicus exists on smaller spatial scales (tens to hundreds of kilometers) than expected given the 40-day planktonic larval period. In addition, genetic differences among age classes may be influenced by inter-annual differences in larval supply or reproductive success. Future genetic studies should sample multiple age classes prior to comparison among locations.
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Acknowledgments
We thank the Maine Department of Marine Resources and the National Marine Fisheries Service for collecting sea scallop tissues used for this study. Fragment analyses were conducted at the University of Maine DNA Sequencing Facility and the Cornell University Life Sciences Core Laboratories Center. We are grateful also for laboratory assistance from L. Donnelly, A. McGowan, B.-A. Pomerleau, Z. Salahuddin, and L. Wahl. The manuscript was improved substantially by comments from J. Muhlin, C. Riginos, and two anonymous reviewers. This research was supported by a Maine Sea Grant award to PDR and National Science Foundation Graduate Research and GK-12 Fellowships to EFO.
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Owen, E.F., Rawson, P.D. Small-scale spatial and temporal genetic structure of the Atlantic sea scallop (Placopecten magellanicus) in the inshore Gulf of Maine revealed using AFLPs. Mar Biol 160, 3015–3025 (2013). https://doi.org/10.1007/s00227-013-2291-8
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DOI: https://doi.org/10.1007/s00227-013-2291-8