Interannual variability in reproductive traits of the Patagonian toothfish Dissostichus eleginoides around the sub-Antarctic island of South Georgia
Commercial fisheries data, collected as part of an observer programme and covering the period 1997–2014, were utilized in order to define key reproductive traits and spawning dynamics of the Patagonian toothfish Dissostichus eleginoides at South Georgia. Multi-year spawning site fidelity of D. elegi...
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2017
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Online Access: | https://pure.uhi.ac.uk/en/publications/0b209e58-6d45-4fd5-89d5-37ba60dae234 https://doi.org/10.1111/jfb.13344 |
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ftuhipublicatio:oai:pure.atira.dk:publications/0b209e58-6d45-4fd5-89d5-37ba60dae234 2024-02-04T09:55:33+01:00 Interannual variability in reproductive traits of the Patagonian toothfish Dissostichus eleginoides around the sub-Antarctic island of South Georgia Brigden, Katie Marshall, Tara Scott, Beth E Young, Emma Brickle, Paul 2017-07-09 https://pure.uhi.ac.uk/en/publications/0b209e58-6d45-4fd5-89d5-37ba60dae234 https://doi.org/10.1111/jfb.13344 eng eng info:eu-repo/semantics/closedAccess Brigden , K , Marshall , T , Scott , B E , Young , E & Brickle , P 2017 , ' Interannual variability in reproductive traits of the Patagonian toothfish Dissostichus eleginoides around the sub-Antarctic island of South Georgia ' , Journal of Fish Biology , vol. 91 , no. 1 , pp. 278-301 . https://doi.org/10.1111/jfb.13344 article 2017 ftuhipublicatio https://doi.org/10.1111/jfb.13344 2024-01-11T23:21:37Z Commercial fisheries data, collected as part of an observer programme and covering the period 1997–2014, were utilized in order to define key reproductive traits and spawning dynamics of the Patagonian toothfish Dissostichus eleginoides at South Georgia. Multi-year spawning site fidelity of D. eleginoides was revealed through the identification of previously unknown spawning hotspots. Timing of female spawning was shown to have shifted later, leading to a shorter spawning duration. A decrease in length and mass of female and male spawning fish and a reduced number of large spawning fish was found, evidence of a change in size structure of spawning D. eleginoides. During the study period fewer later maturity stage females (including spawning stage) were observed in conjunction with increased proportions of early stage female D. eleginoides. The findings are discussed in the context of reproductive success, with consideration of the possible effects such spawning characteristics and behaviours may have on egg and larval survival. This work presents the first long-term assessment of D. eleginoides spawning dynamics at South Georgia and provides valuable knowledge for both the ecology of the species and for future fisheries management of this commercially important species. Article in Journal/Newspaper Antarc* Antarctic Patagonian Toothfish University of the Highlands and Islands: Research Database of UHI Antarctic Journal of Fish Biology 91 1 278 301 |
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Open Polar |
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University of the Highlands and Islands: Research Database of UHI |
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ftuhipublicatio |
language |
English |
description |
Commercial fisheries data, collected as part of an observer programme and covering the period 1997–2014, were utilized in order to define key reproductive traits and spawning dynamics of the Patagonian toothfish Dissostichus eleginoides at South Georgia. Multi-year spawning site fidelity of D. eleginoides was revealed through the identification of previously unknown spawning hotspots. Timing of female spawning was shown to have shifted later, leading to a shorter spawning duration. A decrease in length and mass of female and male spawning fish and a reduced number of large spawning fish was found, evidence of a change in size structure of spawning D. eleginoides. During the study period fewer later maturity stage females (including spawning stage) were observed in conjunction with increased proportions of early stage female D. eleginoides. The findings are discussed in the context of reproductive success, with consideration of the possible effects such spawning characteristics and behaviours may have on egg and larval survival. This work presents the first long-term assessment of D. eleginoides spawning dynamics at South Georgia and provides valuable knowledge for both the ecology of the species and for future fisheries management of this commercially important species. |
format |
Article in Journal/Newspaper |
author |
Brigden, Katie Marshall, Tara Scott, Beth E Young, Emma Brickle, Paul |
spellingShingle |
Brigden, Katie Marshall, Tara Scott, Beth E Young, Emma Brickle, Paul Interannual variability in reproductive traits of the Patagonian toothfish Dissostichus eleginoides around the sub-Antarctic island of South Georgia |
author_facet |
Brigden, Katie Marshall, Tara Scott, Beth E Young, Emma Brickle, Paul |
author_sort |
Brigden, Katie |
title |
Interannual variability in reproductive traits of the Patagonian toothfish Dissostichus eleginoides around the sub-Antarctic island of South Georgia |
title_short |
Interannual variability in reproductive traits of the Patagonian toothfish Dissostichus eleginoides around the sub-Antarctic island of South Georgia |
title_full |
Interannual variability in reproductive traits of the Patagonian toothfish Dissostichus eleginoides around the sub-Antarctic island of South Georgia |
title_fullStr |
Interannual variability in reproductive traits of the Patagonian toothfish Dissostichus eleginoides around the sub-Antarctic island of South Georgia |
title_full_unstemmed |
Interannual variability in reproductive traits of the Patagonian toothfish Dissostichus eleginoides around the sub-Antarctic island of South Georgia |
title_sort |
interannual variability in reproductive traits of the patagonian toothfish dissostichus eleginoides around the sub-antarctic island of south georgia |
publishDate |
2017 |
url |
https://pure.uhi.ac.uk/en/publications/0b209e58-6d45-4fd5-89d5-37ba60dae234 https://doi.org/10.1111/jfb.13344 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Patagonian Toothfish |
genre_facet |
Antarc* Antarctic Patagonian Toothfish |
op_source |
Brigden , K , Marshall , T , Scott , B E , Young , E & Brickle , P 2017 , ' Interannual variability in reproductive traits of the Patagonian toothfish Dissostichus eleginoides around the sub-Antarctic island of South Georgia ' , Journal of Fish Biology , vol. 91 , no. 1 , pp. 278-301 . https://doi.org/10.1111/jfb.13344 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1111/jfb.13344 |
container_title |
Journal of Fish Biology |
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91 |
container_issue |
1 |
container_start_page |
278 |
op_container_end_page |
301 |
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1789959568535584768 |