Historic hybridization and introgression between two iconic Australian anemonefish and contemporary patterns of population connectivity
Endemic species on islands are considered at risk of extinction for several reasons, including limited dispersal abilities, small population sizes, and low genetic diversity. We used mitochondrial DNA (D-Loop) and 17 microsatellite loci to explore the evolutionary relationship between an endemic ane...
| Main Authors: | , , , |
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| Format: | Journal Article |
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John Wiley & Sons
2012
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| Online Access: | http://onlinelibrary.wiley.com/doi/10.1002/ece3.251/pdf http://hdl.handle.net/20.500.11937/21559 |
| _version_ | 1848750623236816896 |
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| author | van der Meer, M. Jones, G. Hobbs, Jean-Paul Van Herwerden, L. |
| author_facet | van der Meer, M. Jones, G. Hobbs, Jean-Paul Van Herwerden, L. |
| author_sort | van der Meer, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Endemic species on islands are considered at risk of extinction for several reasons, including limited dispersal abilities, small population sizes, and low genetic diversity. We used mitochondrial DNA (D-Loop) and 17 microsatellite loci to explore the evolutionary relationship between an endemic anemonefish, Amphiprion mccullochi (restricted to isolated locations in subtropical eastern Australia) and its more widespread sister species, A. akindynos. A mitochondrial DNA (mtDNA) phylogram showed reciprocal monophyly was lacking for the two species, with two supported groups, each containing representatives of both species, but no shared haplotypes and up to 12 species, but not location-specific management units (MUs). Population genetic analyses suggested evolutionary connectivity among samples of each species (mtDNA), while ecological connectivity was only evident among populations of the endemic, A. mccullochi. This suggests higher dispersal between endemic anemonefish populations at both evolutionary and ecological timeframes, despite separation by hundreds of kilometers. The complex mtDNA structure results from historical hybridization and introgression in the evolutionary past of these species, validated by msat analyses (NEWHYBRIDS, STRUCTURE, and DAPC). Both species had high genetic diversities (mtDNA h > 0.90, p= 4.0%; msat genetic diversity, gd > 0.670). While high gd and connectivity reduce extinction risk, identifying and protecting populations implicated in generating reticulate structure among these species should be a conservation priority. |
| first_indexed | 2025-11-14T07:39:46Z |
| format | Journal Article |
| id | curtin-20.500.11937-21559 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:39:46Z |
| publishDate | 2012 |
| publisher | John Wiley & Sons |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-215592019-02-19T04:27:17Z Historic hybridization and introgression between two iconic Australian anemonefish and contemporary patterns of population connectivity van der Meer, M. Jones, G. Hobbs, Jean-Paul Van Herwerden, L. Lord Howe Island extinction risk Great Barrier Reef isolated islands coral reef fish Amphiprion endemism Endemic species on islands are considered at risk of extinction for several reasons, including limited dispersal abilities, small population sizes, and low genetic diversity. We used mitochondrial DNA (D-Loop) and 17 microsatellite loci to explore the evolutionary relationship between an endemic anemonefish, Amphiprion mccullochi (restricted to isolated locations in subtropical eastern Australia) and its more widespread sister species, A. akindynos. A mitochondrial DNA (mtDNA) phylogram showed reciprocal monophyly was lacking for the two species, with two supported groups, each containing representatives of both species, but no shared haplotypes and up to 12 species, but not location-specific management units (MUs). Population genetic analyses suggested evolutionary connectivity among samples of each species (mtDNA), while ecological connectivity was only evident among populations of the endemic, A. mccullochi. This suggests higher dispersal between endemic anemonefish populations at both evolutionary and ecological timeframes, despite separation by hundreds of kilometers. The complex mtDNA structure results from historical hybridization and introgression in the evolutionary past of these species, validated by msat analyses (NEWHYBRIDS, STRUCTURE, and DAPC). Both species had high genetic diversities (mtDNA h > 0.90, p= 4.0%; msat genetic diversity, gd > 0.670). While high gd and connectivity reduce extinction risk, identifying and protecting populations implicated in generating reticulate structure among these species should be a conservation priority. 2012 Journal Article http://hdl.handle.net/20.500.11937/21559 http://onlinelibrary.wiley.com/doi/10.1002/ece3.251/pdf John Wiley & Sons restricted |
| spellingShingle | Lord Howe Island extinction risk Great Barrier Reef isolated islands coral reef fish Amphiprion endemism van der Meer, M. Jones, G. Hobbs, Jean-Paul Van Herwerden, L. Historic hybridization and introgression between two iconic Australian anemonefish and contemporary patterns of population connectivity |
| title | Historic hybridization and introgression between two iconic Australian anemonefish and contemporary patterns of population connectivity |
| title_full | Historic hybridization and introgression between two iconic Australian anemonefish and contemporary patterns of population connectivity |
| title_fullStr | Historic hybridization and introgression between two iconic Australian anemonefish and contemporary patterns of population connectivity |
| title_full_unstemmed | Historic hybridization and introgression between two iconic Australian anemonefish and contemporary patterns of population connectivity |
| title_short | Historic hybridization and introgression between two iconic Australian anemonefish and contemporary patterns of population connectivity |
| title_sort | historic hybridization and introgression between two iconic australian anemonefish and contemporary patterns of population connectivity |
| topic | Lord Howe Island extinction risk Great Barrier Reef isolated islands coral reef fish Amphiprion endemism |
| url | http://onlinelibrary.wiley.com/doi/10.1002/ece3.251/pdf http://hdl.handle.net/20.500.11937/21559 |