Retrospective genomics highlights changes in genetic composition of tiger sharks (Galeocerdo cuvier) and potential loss of a south-eastern Australia population
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...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2022-04-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-10529-w |
| _version_ | 1818278477834485760 |
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| author | Alice Manuzzi Belen Jiménez-Mena Romina Henriques Bonnie J. Holmes Julian Pepperell Janette Edson Mike B. Bennett Charlie Huveneers Jennifer R. Ovenden Einar E. Nielsen |
| author_facet | Alice Manuzzi Belen Jiménez-Mena Romina Henriques Bonnie J. Holmes Julian Pepperell Janette Edson Mike B. Bennett Charlie Huveneers Jennifer R. Ovenden Einar E. Nielsen |
| author_sort | Alice Manuzzi |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-12T23:18:04Z |
| format | Article |
| id | doaj.art-609c396b95bc49558354132b11f03bcd |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-12T23:18:04Z |
| publishDate | 2022-04-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-609c396b95bc49558354132b11f03bcd2022-12-22T00:08:23ZengNature PortfolioScientific Reports2045-23222022-04-0112111410.1038/s41598-022-10529-wRetrospective genomics highlights changes in genetic composition of tiger sharks (Galeocerdo cuvier) and potential loss of a south-eastern Australia populationAlice Manuzzi0Belen Jiménez-Mena1Romina Henriques2Bonnie J. Holmes3Julian Pepperell4Janette Edson5Mike B. Bennett6Charlie Huveneers7Jennifer R. Ovenden8Einar E. Nielsen9National Institute of Aquatic Resources, Technical University of DenmarkNational Institute of Aquatic Resources, Technical University of DenmarkNational Institute of Aquatic Resources, Technical University of DenmarkSchool of Science, Technology & Engineering, University of the Sunshine CoastPepperell Research and ConsultingQueensland Brain Institute, The University of QueenslandSchool of Biomedical Sciences, The University of QueenslandCollege of Science and Engineering, Flinders UniversityMolecular Fisheries Laboratory, School of Biomedical Sciences, The University of QueenslandNational Institute of Aquatic Resources, Technical University of DenmarkAbstract 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.https://doi.org/10.1038/s41598-022-10529-w |
| spellingShingle | Alice Manuzzi Belen Jiménez-Mena Romina Henriques Bonnie J. Holmes Julian Pepperell Janette Edson Mike B. Bennett Charlie Huveneers Jennifer R. Ovenden Einar E. Nielsen Retrospective genomics highlights changes in genetic composition of tiger sharks (Galeocerdo cuvier) and potential loss of a south-eastern Australia population Scientific Reports |
| title | Retrospective genomics highlights changes in genetic composition of tiger sharks (Galeocerdo cuvier) and potential loss of a south-eastern Australia population |
| title_full | Retrospective genomics highlights changes in genetic composition of tiger sharks (Galeocerdo cuvier) and potential loss of a south-eastern Australia population |
| title_fullStr | Retrospective genomics highlights changes in genetic composition of tiger sharks (Galeocerdo cuvier) and potential loss of a south-eastern Australia population |
| title_full_unstemmed | Retrospective genomics highlights changes in genetic composition of tiger sharks (Galeocerdo cuvier) and potential loss of a south-eastern Australia population |
| title_short | Retrospective genomics highlights changes in genetic composition of tiger sharks (Galeocerdo cuvier) and potential loss of a south-eastern Australia population |
| title_sort | retrospective genomics highlights changes in genetic composition of tiger sharks galeocerdo cuvier and potential loss of a south eastern australia population |
| url | https://doi.org/10.1038/s41598-022-10529-w |
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