Genomic signatures of local adaptation reveal source-sink dynamics in a high gene flow fish species.

ABSTRACT: Understanding source-sink dynamics is important for conservation management, particularly when climatic events alter species' distributions. Following a 2011 'marine heatwave' in Western Australia, we observed high recruitment of the endemic fisheries target species Choerodon rubescens, towards the cooler (southern) end of its distribution. Here, we use a genome wide set of 14 559 single-nucleotide polymorphisms (SNPs) to identify the likely source population for this recruitment event. Most loci (76%) showed low genetic divergence across the species' range, indicating high levels of gene flow and confirming previous findings using neutral microsatellite markers. However, a small proportion of loci showed strong patterns of differentiation and exhibited patterns of population structure con

SUBMITTER: Cure K 

PROVIDER: S-EPMC5561064 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature