Evidence of historical isolation and genetic structuring among broadnose sevengill sharks (Notorynchus cepedianus) from the world’s major oceanic regions

Cosmopolitan marine pelagic species display variable patterns of population connectivity among the world’s major oceans. While this information is crucial for informing management, information is lacking for many ecologically important species, including apex predators. In this study we examine patt...

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Bibliographic Details
Published in:Reviews in fish biology and fisheries 2021-06, Vol.31 (2), p.433-447
Main Authors: Schmidt-Roach, Alicia C. J., Bruels, Christine C., Barnett, Adam, Miller, Adam D., Sherman, Craig D. H., Ebert, David A., Schmidt-Roach, Sebastian, da Silva, Charlene, Wilke, Christopher G., Thorburn, Craig, Mangel, Jeffrey C., Ezcurra, Juan Manuel, Irigoyen, Alejo, Jaureguizar, Andrés Javier, Braccini, Matias, Alfaro-Shigueto, Joanna, Duffy, Clinton, Shivji, Mahmood S.
Format: Article
Language:English
Subjects:
Apexes
Bayesian analysis
Biomedical and Life Sciences
Cosmopolitan species
Deoxyribonucleic acid
Divergence
DNA
Fish populations
Freshwater & Marine Ecology
Gene flow
Genetic structure
Glacial periods
Haplotypes
Information management
Life Sciences
Marine fishes
Mitochondrial DNA
Notorynchus cepedianus
Ocean basins
Oceans
Original Research
Pelagic fisheries
Phylogenetics
Phylogeny
Pleistocene
Populations
Predators
Probability theory
Regions
Sharks
Statistical inference
Zoology
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Summary:Cosmopolitan marine pelagic species display variable patterns of population connectivity among the world’s major oceans. While this information is crucial for informing management, information is lacking for many ecologically important species, including apex predators. In this study we examine patterns of genetic structure in the broadnose sevengill shark, Notorynchus cepedianus across its global distribution. We estimate patterns of connectivity among broadnose sevengill shark populations from three major oceanic regions (South Atlantic, Oceania and Eastern Pacific) by contrasting mitochondrial and nuclear DNA haplotype frequencies. We also produced time calibrated Bayesian Inference phylogenetic reconstructions to analyses global phylogeographic patterns and estimate divergence times among distinctive shark lineages. Our results demonstrate significant genetic differentiation among oceanic regions ( Φ ST  = 0.9789, P  
ISSN:0960-3166
1573-5184
DOI:10.1007/s11160-021-09651-1