5 Works

Data from: Oceanographic variation influences spatial genomic structure in the sea scallop, Placopecten magellanicus

Mallory Van Wyngaarden, Paul V. R. Snelgrove, Claudio DiBacco, Lorraine C. Hamilton, Naiara Rodriguez-Ezpeleta, Luyao Zhan, Robert Beiko, Ian R. Bradbury & Robert G. Beiko
Environmental factors can influence diversity and population structure in marine species and accurate understanding of this influence can both improve fisheries management and help predict responses to environmental change. We used 7163 SNPs derived from restriction site-associated DNA sequencing genotyped in 245 individuals of the economically important sea scallop, Placopecten magellanicus, to evaluate the correlations between oceanographic variation and a previously identified latitudinal genomic cline. Sea scallops span a broad latitudinal area (>10 degrees), and...

Data from: Temporal dynamics of the genetic clines of invasive European green crab (Carcinus maenas) in eastern North America

Sarah J. Lehnert, Claudio DiBacco, Nicholas W. Jeffery, April M.H. Blakeslee, Jonatan Isaksson, Joe Roman, Brendan F. Wringe, Ryan R.E. Stanley, Kyle Matheson, Cynthia H. McKenzie, Lorraine C. Hamilton, Ian R. Bradbury, Ryan R. E. Stanley & April M. H. Blakeslee
Two genetically distinct lineages of European green crabs (Carcinus maenas) were independently introduced to eastern North America, the first in the early 19th century and the second in the late 20th century. These lineages first came into secondary contact in southeastern Nova Scotia, Canada (NS), where they hybridized, producing latitudinal genetic clines. Previous studies have documented a persistent southward shift in the clines of different marker types, consistent with existing dispersal and recruitment pathways. We...

Data from: Genomic signatures of population bottleneck and recovery in Northwest Atlantic pinnipeds

Kristina M. Cammen, Thomas F. Schultz, W. Don Bowen, Michael O. Hammill, Wendy B. Puryear, Jonathan Runstadler, Frederick W. Wenzel, Stephanie A. Wood & Michael Kinnison
Population increases over the past several decades provide natural settings in which to study the evolutionary processes that occur during bottleneck, growth, and spatial expansion. We used parallel natural experiments of historical decline and subsequent recovery in two sympatric pinniped species in the Northwest Atlantic, the gray seal (Halichoerus grypus atlantica) and harbor seal (Phoca vitulina vitulina), to study the impact of recent demographic change in genomic diversity. Using restriction siteā€associated DNA sequencing, we assessed...

Data from: Estimating the relative fitness of escaped farmed salmon offspring in the wild and modeling the consequences of invasion for wild populations

Emma V.A. Sylvester, Brendan F. Wringe, Steven J. Duffy, Lorraine C. Hamilton, Ian A. Fleming, Marco Castellani, Paul Bentzen, Ian R. Bradbury & Emma V. A. Sylvester
Throughout their native range, wild Atlantic salmon populations are threatened by hybridization and introgression with escapees from net-pen salmon aquaculture. Although domestic-wild hybrid offspring have shown reduced fitness in lab and field experiments, consequential impacts on population abundance and genetic integrity remain difficult to predict in the field, in part because the strength of selection against domestic offspring is often unknown and context-dependent. Here we follow a single large escape event of farmed Atlantic salmon...

Data from: Genome-wide evidence of environmentally mediated secondary contact of European green crab (Carcinus maenas) lineages in eastern North America

Nicholas W. Jeffery, Ian R. Bradbury, Ryan R.E. Stanley, Brendan F. Wringe, Mallory Van Wyngaarden, J. Ben Lowen, Cynthia H. McKenzie, Kyle Matheson, Philip S. Sargent, Claudio DiBacco & Ryan R. E. Stanley
Genetic-environment associations are increasingly revealed through population genomic data and can occur through a number of processes, including secondary contact, divergent natural selection, or isolation-by-distance. Here we investigate the influence of the environment, including seasonal temperature and salinity, on the population structure of the invasive European green crab (Carcinus maenas) in eastern North America. Green crab populations in eastern North America are associated with two independent invasions, previously shown to consist of distinct northern and...

Registration Year

  • 2018

Resource Types

  • Dataset


  • Bedford Institute of Oceanography
  • Dalhousie University
  • Fisheries and Oceans Canada
  • Memorial University of Newfoundland
  • University of Massachusetts Amherst
  • Duke University
  • University of Vermont
  • University of Maine
  • East Carolina University
  • Northeast Fisheries Science Center