Journal article
Genomic population structure of great hammerhead sharks (Sphyrna mokarran) across the Indo-Pacific
Marine and freshwater research, Vol.75(6), pp.1-11
04/2024
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Abstract
Context: Currently, little information exists describing the population structure of great hammerhead sharks (Sphyrna mokarran) in Australian waters.
Aims: This study used single nucleotide polymorphisms to investigate fine-scale population structure in S. mokarran across the Indo-Pacific.
Methods: DNA was extracted from 235 individuals across six Australian locations and a Red Sea outgroup. Population parameters were calculated and visualised to test structuring across locations.
Key results: No fine-scale population structuring was observed for S. mokarran across the Indo-Pacific. However, population structuring occurred for all Australian locations when compared to the Red Sea outgroup.
Conclusions: Findings suggest a single stock is most likely for S. mokarran found in Australian waters. Results provide key information for understanding the broad range movements of S. mokarran and help to define the scale of management required to preserve genetic diversity in this species. The structuring between Australia and the Red Sea indicates limited gene flow and movement.
Implications: Results indicate that large-scale movements of S. mokarran could be occurring to facilitate genetic mixing. Future research focusing on individual tagging to corroborate movements would be highly beneficial to determine how far (and often) individuals are dispersing, and to note where cross-jurisdictional management, including from neighbouring regions in the Indo-West Pacific-Oceania region, are most critical.
Details
- Title
- Genomic population structure of great hammerhead sharks (Sphyrna mokarran) across the Indo-Pacific
- Creators
- Naomi L. Brunjes - Univ Sunshine Coast, Sch Sci Technol & Engn, Sippy Downs, Qld 4556, AustraliaSamuel M. Williams - University of the Sunshine CoastAlexis L. Levengood - Univ Sunshine Coast, Sch Sci Technol & Engn, Sippy Downs, Qld 4556, AustraliaMatt K. Broadhurst - The University of QueenslandVincent Raoult - Macquarie UniversityAlastair V. Harry - Govt Western Australia, Western Australian Fisheries & Marine Res Labs, Dept Primary Ind & Reg Dev, North Beach, WA 6920, AustraliaMatias Braccini - Government of Western AustraliaMadeline E. Green - University of TasmaniaJulia L. Y. Spaet - University of CambridgeMichael J. Travers - Government of Western AustraliaBonnie J. Holmes - University of the Sunshine Coast
- Publication Details
- Marine and freshwater research, Vol.75(6), pp.1-11
- Publisher
- CSIRO Publishing
- Number of pages
- 10
- Grant note
- Funding for this research was provided by the Thomas Davies Research Grant for Marine, Soil and Plant Biology (Australian Academy of Science), the Winifred Violet Scott Charitable Trust, the Jock Clough Marine Foundation, and the Queensland Department of Agriculture and Fisheries.
- Identifiers
- 991013382051702368
- Copyright
- © 2024 The Author(s) (or their employer(s)).
- Academic Unit
- Faculty of Science and Engineering; National Marine Science Centre
- Language
- English
- Resource Type
- Journal article