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Published February 9, 2023 | Version v1
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Data for: From rivers to ocean basins: The role of ocean barriers and philopatry in the genetic structuring of a cosmopolitan coastal predator

Authors/Creators

  • 1. Commonwealth Scientific and Industrial Research Organisation
  • 2. University of Tasmania
  • 3. Charles Darwin University
  • 4. Independent Reseacher*
  • 5. Florida International University
  • 6. Universidade Federal do Ceará
  • 7. South China Agricultural University
  • 8. University of KwaZulu-Natal
  • 9. Oceanographic Research Institute*
  • 10. Mississippi State University
  • 11. University of Costa Rica
  • 12. Blue Resources Trust
  • 13. University of the South Pacific
  • 14. Pelagios-Kakunja*
  • 15. James Cook University
  • 16. Universidad Veritas
  • 17. University of Tokyo
  • 18. Elasmo Project
  • 19. University of Reunion Island
  • 20. Department of Industry, Tourism and Trade*
  • 21. MigraMar*
  • 22. Elasmobranch Research*
  • 23. National Museum of Natural History
  • 24. Florida Museum of Natural History
  • 25. Environment Seychelles*
  • 26. University of Southern Mississippi
  • 27. University of La Réunion
  • 28. New South Wales Department of Primary Industries
  • 29. University of the Ryukyus
  • 30. University of Queensland

Description

The Bull Shark (Carcharhinus leucas) faces varying levels of exploitation around the world due to its coastal distribution. Information regarding population connectivity is crucial to evaluate its conservation status and local fishing impacts. In this study, we sampled 922 putative Bull Sharks from 19 locations in the first global assessment of population structure of this cosmopolitan species. Using a recently developed DNA-capture approach (DArTcap), samples were genotyped for 3,400 nuclear markers. Additionally, full mitochondrial genomes of 384 Indo-Pacific samples were sequenced. Reproductive isolation was found between and across ocean basins (eastern Pacific, western Atlantic, eastern Atlantic, Indo-West Pacific) with distinct island populations in Japan and Fiji. Bull Sharks appear to maintain gene flow using shallow coastal waters as dispersal corridors, whereas large oceanic distances and historical land-bridges act as barriers. Females tend to return to the same area for reproduction, making them more susceptible to local threats and an important focus for management actions. Given these behaviours, the exploitation of Bull Sharks from insular populations, such as Japan and Fiji, may instigate local decline that cannot readily be replenished by immigration, which can in turn affect ecosystem dynamics and functions. These data also supported the development of a genetic panel to ascertain the population of origin, which will be useful in monitoring the trade of fisheries products and assessing population-level impacts of this harvest.

Notes

Raw data are provided in Excell .csv file. Quality-filtered SNP data are provied as .Rdata. All analyses were performed in R 4.0.2, mainly using the following packges: radiator, adegenet, stratag, diveRsity, and rubias.

Funding provided by: Sea World Research and Rescue Foundation
Crossref Funder Registry ID: http://dx.doi.org/10.13039/100009034
Award Number: 27

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Devloo-Delva-et-al._Supplementary_material.pdf

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Additional details

Related works

Is derived from
10.5061/dryad.4qrfj6qdg (DOI)