Genetic structure of Patagonian toothfish populations from otolith DNA
© Antarctic Science Ltd 2016. The Patagonian toothfish, Dissostichus eleginoides, is a valuable fishery species and has a discontinuous distribution across the Southern Ocean. Identification of the genetic stock structure of toothfish would allow evaluation of the suitability of the spatial scale at...
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CAMBRIDGE UNIV PRESS, 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
2016
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Online Access: | https://hdl.handle.net/20.500.11937/72059 https://doi.org/10.1017/S0954102016000183 |
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ftcurtin:oai:espace.curtin.edu.au:20.500.11937/72059 2023-06-11T04:06:50+02:00 Genetic structure of Patagonian toothfish populations from otolith DNA Toomey, L. Welsford, D. Appleyard, S. Polanowski, A. Faux, C. Deagle, B. Belchier, M. Marthick, J. Jarman, Simon 2016 restricted https://hdl.handle.net/20.500.11937/72059 https://doi.org/10.1017/S0954102016000183 unknown CAMBRIDGE UNIV PRESS, 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA http://hdl.handle.net/20.500.11937/72059 doi:10.1017/S0954102016000183 Journal Article 2016 ftcurtin https://doi.org/20.500.11937/7205910.1017/S0954102016000183 2023-05-30T19:54:49Z © Antarctic Science Ltd 2016. The Patagonian toothfish, Dissostichus eleginoides, is a valuable fishery species and has a discontinuous distribution across the Southern Ocean. Identification of the genetic stock structure of toothfish would allow evaluation of the suitability of the spatial scale at which fisheries management operates. Genetic subdivision seems likely given the species distribution. Population genetics studies of this species have been performed; however, they have been limited by sample size, spatial coverage and/or the type of markers investigated. As a potential solution, we developed methods for extracting toothfish DNA from otoliths that are available in large numbers from collections held at several research institutes. Genetic differentiation between the three oceanic sectors was investigated. Four mitochondrial and four nuclear markers with multiple single nucleotide polymorphisms were sequenced by high throughput sequencing for samples from six locations. Genetic differentiation was found between three sectors with nuclear markers. However, only the Pacific sector was differentiated from other sectors with mitochondrial markers. This study demonstrates the usefulness of otolith DNA as a means of increasing sample sizes for population genetics research of fish. Additionally, the combination of nuclear and mitochondrial markers may allow insight into how the observed differences in movements between male and female toothfish impact population structure. Article in Journal/Newspaper Antarc* Antarctic Patagonian Toothfish Southern Ocean Curtin University: espace Antarctic Pacific Southern Ocean Antarctic Science 28 5 347 360 |
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© Antarctic Science Ltd 2016. The Patagonian toothfish, Dissostichus eleginoides, is a valuable fishery species and has a discontinuous distribution across the Southern Ocean. Identification of the genetic stock structure of toothfish would allow evaluation of the suitability of the spatial scale at which fisheries management operates. Genetic subdivision seems likely given the species distribution. Population genetics studies of this species have been performed; however, they have been limited by sample size, spatial coverage and/or the type of markers investigated. As a potential solution, we developed methods for extracting toothfish DNA from otoliths that are available in large numbers from collections held at several research institutes. Genetic differentiation between the three oceanic sectors was investigated. Four mitochondrial and four nuclear markers with multiple single nucleotide polymorphisms were sequenced by high throughput sequencing for samples from six locations. Genetic differentiation was found between three sectors with nuclear markers. However, only the Pacific sector was differentiated from other sectors with mitochondrial markers. This study demonstrates the usefulness of otolith DNA as a means of increasing sample sizes for population genetics research of fish. Additionally, the combination of nuclear and mitochondrial markers may allow insight into how the observed differences in movements between male and female toothfish impact population structure. |
format |
Article in Journal/Newspaper |
author |
Toomey, L. Welsford, D. Appleyard, S. Polanowski, A. Faux, C. Deagle, B. Belchier, M. Marthick, J. Jarman, Simon |
spellingShingle |
Toomey, L. Welsford, D. Appleyard, S. Polanowski, A. Faux, C. Deagle, B. Belchier, M. Marthick, J. Jarman, Simon Genetic structure of Patagonian toothfish populations from otolith DNA |
author_facet |
Toomey, L. Welsford, D. Appleyard, S. Polanowski, A. Faux, C. Deagle, B. Belchier, M. Marthick, J. Jarman, Simon |
author_sort |
Toomey, L. |
title |
Genetic structure of Patagonian toothfish populations from otolith DNA |
title_short |
Genetic structure of Patagonian toothfish populations from otolith DNA |
title_full |
Genetic structure of Patagonian toothfish populations from otolith DNA |
title_fullStr |
Genetic structure of Patagonian toothfish populations from otolith DNA |
title_full_unstemmed |
Genetic structure of Patagonian toothfish populations from otolith DNA |
title_sort |
genetic structure of patagonian toothfish populations from otolith dna |
publisher |
CAMBRIDGE UNIV PRESS, 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA |
publishDate |
2016 |
url |
https://hdl.handle.net/20.500.11937/72059 https://doi.org/10.1017/S0954102016000183 |
geographic |
Antarctic Pacific Southern Ocean |
geographic_facet |
Antarctic Pacific Southern Ocean |
genre |
Antarc* Antarctic Patagonian Toothfish Southern Ocean |
genre_facet |
Antarc* Antarctic Patagonian Toothfish Southern Ocean |
op_relation |
http://hdl.handle.net/20.500.11937/72059 doi:10.1017/S0954102016000183 |
op_doi |
https://doi.org/20.500.11937/7205910.1017/S0954102016000183 |
container_title |
Antarctic Science |
container_volume |
28 |
container_issue |
5 |
container_start_page |
347 |
op_container_end_page |
360 |
_version_ |
1768379008114753536 |