10.5061/DRYAD.P9B8K
Jeffery, Nicholas W.
Fisheries and Oceans Canada
DiBacco, Claudio
Fisheries and Oceans Canada
Wringe, Brendan F.
Fisheries and Oceans Canada
Stanley, Ryan R.E.
Fisheries and Oceans Canada
Hamilton, Lorraine C.
Bedford Institute of Oceanography
Ravindran, Praveen N.
Dalhousie University
Bradbury, Ian R.
Fisheries and Oceans Canada
Data from: Genomic evidence of hybridization between two independent
invasions of European green crab (Carcinus maenas) in the Northwest
Atlantic
Dryad
dataset
2017
invasion genomics
Carcinus maenas
green crab
2017-03-22T13:50:38Z
2017-03-22T13:50:38Z
en
https://doi.org/10.1038/hdy.2017.22
15949026 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Invasive species have been associated with significant negative impacts in
their introduced range often outcompeting native species, yet the
long-term evolutionary dynamics of biological invasions are not well
understood. Hybridization, either among waves of invasion or between
native and introduced populations, could alter the ecological and
evolutionary impacts of invasions yet has rarely been studied in marine
invasive species. The European green crab (Carcinus maenas) invaded
eastern North America twice from northern and southern locations in its
native range. Here we examine the frequency of hybridization among these
two distinct invasions at locations from New Jersey, USA to Newfoundland,
Canada using restriction-site associated DNA sequencing (RAD-seq),
microsatellite loci, and COI mtDNA sequences. We used Bayesian clustering
and hybrid assignment analyses to investigate hybridization between the
northern and southern populations. Of the samples analyzed, six locations
contained at least one hybrid individual, while two locations were
characterized by extensive hybridization, with 95% of individuals
collected from Placentia Bay, Newfoundland being hybrids (mostly F2), and
90% of individuals from Kejimkujik, Nova Scotia being classified as
hybrids, mostly backcrosses to the northern ecotype. The presence of both
F2 hybrids and backcrossed individuals suggests that these hybrids are
viable and introgression is occurring between invasions. Our results
provide insight into the demographic and evolutionary consequences of
hybridization between independent invasions, and will inform the
management of green crabs in eastern North America.
Microsat_GenepopGenepop file of all microsatellite alleles for green
crabgreen_crab_RAD_FilteredGenepop file of RAD-seq derived loci after
filtering for missing data and individuals with low
coverage.FinalMicrosat_Renamed_Genepop_ForSim_S1R1_NHNewHybrids file of
simulated individuals for power analyses using microsatellite
dataSimulated_RAD_Data_ForNewHybridsSimulated Pure 1, Pure 2, F1, F2, and
BC1 and BC2 individuals using the top 200 high Fst low linkage
disequilibrium loci for testing power of the SNP
panel.Final_Renamed_Genepop_ForSim_200_Loci_Panel_S1R1_NH.txt
Eastern North America
Northwest Atlantic