A genomic assessment of movement and gene flow around the South Florida vicariance zone in the migratory coastal blacknose shark, Carcharhinus acronotus

View Researcher's Other Codes

Disclaimer: The provided code links for this paper are external links. Science Nest has no responsibility for the accuracy, legality or content of these links. Also, by downloading this code(s), you agree to comply with the terms of use as set out by the author(s) of the code(s).

Please contact us in case of a broken link from here

Authors Miguel Baltazar-Soares, Arne Biastoch, Chris Harrod, Reinhold Hanel, Lasse Marohn, Enno Prigge, Derek Evans, Kenneth Bodles, Erik Behrens, Claus W. Böning, Christophe Eizaguirre
Journal/Conference Name Marine Genomics
Paper Category
Paper Abstract South Florida has been identified as a genetic break for multiple mobile marine taxa but the mechanisms that impede gene flow largely remain unknown. To understand how South Florida functions as a barrier for blacknose shark, a highly migratory species that has genetically diverged Atlantic and Gulf populations, patterns of genetic variation were assessed in 212 individuals sampled from the Atlantic, eastern Gulf, and Florida Keys at 2213 nuclear-encoded SNP-containing loci. Results support divergence between the Gulf and Atlantic (FST ~ 0.002, P < 0.05), and 51 individuals caught in the Keys were assigned to the Gulf, as compared to only two individuals that assigned to the Atlantic, indicating that Florida Keys is largely composed of Gulf individuals. Further, two to three migrants were identified, all of which were Gulf individuals captured in the Atlantic. The results indicate that South Florida does not prevent individual movement between the Gulf and Atlantic and that the Keys may be a seasonal mixing zone. However, the Gulf and Atlantic remain genetically independent, suggesting that region-specific reproductive behavior/compatibility, or aspects of movement ecology, such as swimming energetics or temperature-driven interannual variability in migratory range, may maintain divergence rather than a physical barrier in South Florida.
Date of publication 2014
Code Programming Language R
Comment

Copyright Researcher 2022