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Retrospective genomics highlights changes in genetic composition of tiger sharks (Galeocerdo cuvier) and potential loss of a south-eastern Australia population2.19 MB
Published VersionCC BY V4.0, Open Access
Journal article
Retrospective genomics highlights changes in genetic composition of tiger sharks (Galeocerdo cuvier) and potential loss of a south-eastern Australia population
Scientific Reports, Vol.12, pp.1-14
2022
Abstract
Over the last century, many shark populations have declined, primarily due to overexploitation in commercial, artisanal and recreational fisheries. In addition, in some locations the use of shark control programs also has had an impact on shark numbers. Still, there is a general perception that populations of large ocean predators cover wide areas and therefore their diversity is less susceptible to local anthropogenic disturbance. Here we report on temporal genomic analyses of tiger shark (Galeocerdo cuvier) DNA samples that were collected from eastern Australia over the past century. Using Single Nucleotide Polymorphism (SNP) loci, we documented a significant change in genetic composition of tiger sharks born between ~1939 and 2015. The change was most likely due to a shift over time in the relative contribution of two well-differentiated, but hitherto cryptic populations. Our data strongly indicate a dramatic shift in the relative contribution of these two populations to the overall tiger shark abundance on the east coast of Australia, possibly associated with differences in direct or indirect exploitation rates.
Details
- Title
- Retrospective genomics highlights changes in genetic composition of tiger sharks (Galeocerdo cuvier) and potential loss of a south-eastern Australia population
- Authors
- Alice Manuzzi (Corresponding Author) - Technical University of DenmarkBelen Jiménez-Mena (Author) - Technical University of DenmarkRomina Henriques (Author) - Technical University of DenmarkBonnie Holmes (Author) - University of the Sunshine Coast, Queensland, School of Science, Technology and EngineeringJulian Pepperell (Author) - Pepperell Research and Consulting (Noosaville, Australia)Janette Edson (Author) - The University of QueenslandMike B Bennett (Author) - The University of QueenslandCharlie Huveneers (Author) - Flinders UniversityJennifer R Ovenden (Author) - The University of QueenslandEinar Eg Nielsen (Author) - Technical University of Denmark
- Publication details
- Scientific Reports, Vol.12, pp.1-14
- Publisher
- Nature Publishing Group
- Date published
- 2022
- DOI
- 10.1038/s41598-022-10529-w
- ISSN
- 2045-2322
- Copyright note
- Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
- Organisation Unit
- University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 99629434002621
- Output Type
- Journal article
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