Journal article
Genomic population structure of great hammerhead sharks (Sphyrna mokarran) across the Indo-Pacific
Marine & Freshwater Research, Vol.75(6), pp.1-10
2024
Appears in UniSC Supported Open Access Outputs
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
- Authors
- Naomi Brunjes (Corresponding Author) - University of the Sunshine CoastSamuel M. Williams (Author) - University of the Sunshine CoastAlexis Levengood - University of the Sunshine CoastMatt Broadhurst (Author) - New South Wales Department of Primary IndustriesVincent Raoult (Author) - Macquarie UniversityAlistair Harry (Author) - Department of Primary Industries and Regional DevelopmentMatias Braccini (Author) - Department of Primary Industries and Regional DevelopmentMadeline E Green (Author) - University of TasmaniaJulia Spaet (Author) - University of CambridgeMichael Travers (Author) - Department of Primary Industries and Regional DevelopmentBonnie Holmes (Author) - University of the Sunshine Coast
- Publication details
- Marine & Freshwater Research, Vol.75(6), pp.1-10
- Publisher
- CSIRO Publishing
- Date published
- 2024
- DOI
- 10.1071/MF23236
- ISSN
- 1448-6059
- Copyright note
- © 2024 The Author(s) (or their employer(s)). Published by CSIRO Publishing. This is an open access article distributed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND)
- Data Availability
- The datasets generated during or analysed during the current study are available from the corresponding author on reasonable request.
- 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.
- Organisation Unit
- School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 991008895302621
- Output Type
- Journal article
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