Local genetic patchiness but no regional differences between Indo-West Pacific populations of the dogtooth tuna Gymnosarda unicolor
Physical barriers can have profound impacts on dispersal in marine species. Here, we investigate population structure and levels of relatedness among individuals of the coral reef associated fish, the dogtooth tuna Gymnosarda unicolor, collected from 15 sites across the Indo-West Pacific region. We...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
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Inter-Research
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/34548 |
| _version_ | 1848754252575408128 |
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| author | Bentley, B. Harvey, Euan Newman, Stephen Welch, D. Smith, A. Kennington, W. |
| author_facet | Bentley, B. Harvey, Euan Newman, Stephen Welch, D. Smith, A. Kennington, W. |
| author_sort | Bentley, B. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Physical barriers can have profound impacts on dispersal in marine species. Here, we investigate population structure and levels of relatedness among individuals of the coral reef associated fish, the dogtooth tuna Gymnosarda unicolor, collected from 15 sites across the Indo-West Pacific region. We screened 92 individuals for genetic variation at 13 nuclear microsatellite loci and the cytochrome c oxidase subunit 1 (COI) mitochondrial DNA (mtDNA) gene. We detected no genetic differentiation between ocean basins or between sites within ocean basins, suggesting G. unicolor possesses a highly mobile larval or juvenile stage. In addition, the lack of deep evolutionary mtDNA divergences suggests gene flow was also not limited historically. However, comparisons of relatedness between pairs of individuals revealed that individuals collected from the same site were more related to each other, on average, than individuals collected from different sites. Such patterns are consistent with chaotic genetic patchiness, a possible consequence of high variance in reproductive success and patchy, local recruitment. |
| first_indexed | 2025-11-14T08:37:27Z |
| format | Journal Article |
| id | curtin-20.500.11937-34548 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:37:27Z |
| publishDate | 2014 |
| publisher | Inter-Research |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-345482017-09-13T15:14:32Z Local genetic patchiness but no regional differences between Indo-West Pacific populations of the dogtooth tuna Gymnosarda unicolor Bentley, B. Harvey, Euan Newman, Stephen Welch, D. Smith, A. Kennington, W. Microsatellites Gymnosarda unicolor Ephemeral genetic patchiness Spatial genetic structure mtDNA Physical barriers can have profound impacts on dispersal in marine species. Here, we investigate population structure and levels of relatedness among individuals of the coral reef associated fish, the dogtooth tuna Gymnosarda unicolor, collected from 15 sites across the Indo-West Pacific region. We screened 92 individuals for genetic variation at 13 nuclear microsatellite loci and the cytochrome c oxidase subunit 1 (COI) mitochondrial DNA (mtDNA) gene. We detected no genetic differentiation between ocean basins or between sites within ocean basins, suggesting G. unicolor possesses a highly mobile larval or juvenile stage. In addition, the lack of deep evolutionary mtDNA divergences suggests gene flow was also not limited historically. However, comparisons of relatedness between pairs of individuals revealed that individuals collected from the same site were more related to each other, on average, than individuals collected from different sites. Such patterns are consistent with chaotic genetic patchiness, a possible consequence of high variance in reproductive success and patchy, local recruitment. 2014 Journal Article http://hdl.handle.net/20.500.11937/34548 10.3354/meps10819 Inter-Research restricted |
| spellingShingle | Microsatellites Gymnosarda unicolor Ephemeral genetic patchiness Spatial genetic structure mtDNA Bentley, B. Harvey, Euan Newman, Stephen Welch, D. Smith, A. Kennington, W. Local genetic patchiness but no regional differences between Indo-West Pacific populations of the dogtooth tuna Gymnosarda unicolor |
| title | Local genetic patchiness but no regional differences between Indo-West Pacific populations of the dogtooth tuna Gymnosarda unicolor |
| title_full | Local genetic patchiness but no regional differences between Indo-West Pacific populations of the dogtooth tuna Gymnosarda unicolor |
| title_fullStr | Local genetic patchiness but no regional differences between Indo-West Pacific populations of the dogtooth tuna Gymnosarda unicolor |
| title_full_unstemmed | Local genetic patchiness but no regional differences between Indo-West Pacific populations of the dogtooth tuna Gymnosarda unicolor |
| title_short | Local genetic patchiness but no regional differences between Indo-West Pacific populations of the dogtooth tuna Gymnosarda unicolor |
| title_sort | local genetic patchiness but no regional differences between indo-west pacific populations of the dogtooth tuna gymnosarda unicolor |
| topic | Microsatellites Gymnosarda unicolor Ephemeral genetic patchiness Spatial genetic structure mtDNA |
| url | http://hdl.handle.net/20.500.11937/34548 |