Data from: Geographic extent of introgression in Sebastes mentella and its effect on genetic population structure

Genetic population structure is often used to identify management units in exploited species, but the extent of genetic differentiation may be inflated by geographic variation in the level of hybridization between species. We identify the genetic population structure of Sebastes mentella and investi...

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Bibliographic Details
Main Authors: Saha, Atal, Johansen, Torild, Hedeholm, Rasmus, Nielsen, Einar E., Westgaard, Jon-Ivar, Hauser, Lorenz, Planque, Benjamin, Cadrin, Steven X., Boje, Jesper
Format: Dataset
Language:unknown
Published: 2016
Subjects:
Redfish
oceanic
1992
2012
Hybrid-zone
incipient speciation
Sebastes mentella
Arctic
Greenland
Irminger Sea
East Greenland
North Atlantic
Northwest Atlantic
Online Access:https://zenodo.org/record/4995550
https://doi.org/10.5061/dryad.94d1s
Description
Summary:Genetic population structure is often used to identify management units in exploited species, but the extent of genetic differentiation may be inflated by geographic variation in the level of hybridization between species. We identify the genetic population structure of Sebastes mentella and investigate possible introgression within the genus by analyzing 13 microsatellites in 2,562 redfish specimens sampled throughout the North Atlantic. The data support an historical divergence between the "shallow" and "deep" groups, beyond the Irminger Sea where they were described previously. A third group, "slope," has an extended distribution on the East Greenland Shelf, in addition to earlier findings on the Icelandic slope. Furthermore, S. mentella from the Northeast Arctic and Northwest Atlantic waters are genetically different populations. In both areas, interspecific introgression may influence allele frequency differences among populations. Evidence of introgression was found for almost all the identified Sebastes gene pools, but to a much lower extent than suggested earlier. Greenland waters appear to be a sympatric zone for many of the genetically independent Sebastes groups. This study illustrates that the identified groups maintain their genetic integrity in this region despite introgression. Sebastes_raw_dataData includes two sub-sets: 1. Data used to study genetic structure of S. mentella (mentella genotypes) and 2. data used for studying introgression (Sebastes genotypes). Biological data are shown in subsequent sheets.

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