Distribution of larval and juvenile pelagic squids in the Kerguelen Axis region: oceanographic influence on size structure and evidence of spawning locations
Pelagic squids are a key component in Southern Ocean ecosystems. Most species have a circumpolar distribution that is patchy in relation to major oceanographic features. However, little is known regarding where and when they spawn, or subsequently, what environmental predictors drive the size distri...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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Online Access: | https://doi.org/10.1016/j.dsr2.2019.07.003 http://ecite.utas.edu.au/134581 |
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ftunivtasecite:oai:ecite.utas.edu.au:134581 2023-05-15T18:24:58+02:00 Distribution of larval and juvenile pelagic squids in the Kerguelen Axis region: oceanographic influence on size structure and evidence of spawning locations Lin, D Walters, A Bestley, S Zhu, G Chen, X Trebilco, R 2019 https://doi.org/10.1016/j.dsr2.2019.07.003 http://ecite.utas.edu.au/134581 en eng Pergamon-Elsevier Science Ltd http://dx.doi.org/10.1016/j.dsr2.2019.07.003 Lin, D and Walters, A and Bestley, S and Zhu, G and Chen, X and Trebilco, R, Distribution of larval and juvenile pelagic squids in the Kerguelen Axis region: oceanographic influence on size structure and evidence of spawning locations, Deep-Sea Research Part II, 174 Article 104615. ISSN 0967-0645 (2019) [Refereed Article] http://ecite.utas.edu.au/134581 Biological Sciences Ecology Marine and estuarine ecology (incl. marine ichthyology) Refereed Article PeerReviewed 2019 ftunivtasecite https://doi.org/10.1016/j.dsr2.2019.07.003 2022-09-05T22:16:57Z Pelagic squids are a key component in Southern Ocean ecosystems. Most species have a circumpolar distribution that is patchy in relation to major oceanographic features. However, little is known regarding where and when they spawn, or subsequently, what environmental predictors drive the size distribution particularly during early life stages. Here, we relate the size distribution of larval and juvenile squids to the oceanographic conditions around the southern Kerguelen Plateau. This is an important foraging area for many predators of squid, but there has been very little sampling effort for squids to date in that area. Seven squid species from six families were captured using depth-stratified mid-water trawls. The squids had a mantle length (ML) ranging from 7.3 to 680.1 mm, and were at their larval and juvenile form with the exception of two larger mature Galiteuthis glacialis (431.4 mm and 680.1 mm ML). Squids at stages 0 to I were predominant (ML < 100 mm), with a single size mode for each species, suggesting that these species may use the plateau as a spawning and/or nursery ground. Larger individuals (>100 mm ML, above maturity stage I) were generally observed more in the southeast of the study domain. Squid size was positively associated with lower minimal water column temperature, higher surface chlorophyll- a concentration, and both the deepest and shallowest layers of the water column. The spatial distribution may be adaptive, helping to reduce inter- and intra-species competition and increase survivorship during early life stages. The reported relationships provide important new insights into the biophysical drivers of pelagic squid habitats around the Southern Ocean. These data significantly increase the known range of several Southern Ocean species and present implications for spawning habitat that warrant further investigation. Article in Journal/Newspaper Southern Ocean eCite UTAS (University of Tasmania) Kerguelen Southern Ocean Deep Sea Research Part II: Topical Studies in Oceanography 174 104615 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Biological Sciences Ecology Marine and estuarine ecology (incl. marine ichthyology) |
spellingShingle |
Biological Sciences Ecology Marine and estuarine ecology (incl. marine ichthyology) Lin, D Walters, A Bestley, S Zhu, G Chen, X Trebilco, R Distribution of larval and juvenile pelagic squids in the Kerguelen Axis region: oceanographic influence on size structure and evidence of spawning locations |
topic_facet |
Biological Sciences Ecology Marine and estuarine ecology (incl. marine ichthyology) |
description |
Pelagic squids are a key component in Southern Ocean ecosystems. Most species have a circumpolar distribution that is patchy in relation to major oceanographic features. However, little is known regarding where and when they spawn, or subsequently, what environmental predictors drive the size distribution particularly during early life stages. Here, we relate the size distribution of larval and juvenile squids to the oceanographic conditions around the southern Kerguelen Plateau. This is an important foraging area for many predators of squid, but there has been very little sampling effort for squids to date in that area. Seven squid species from six families were captured using depth-stratified mid-water trawls. The squids had a mantle length (ML) ranging from 7.3 to 680.1 mm, and were at their larval and juvenile form with the exception of two larger mature Galiteuthis glacialis (431.4 mm and 680.1 mm ML). Squids at stages 0 to I were predominant (ML < 100 mm), with a single size mode for each species, suggesting that these species may use the plateau as a spawning and/or nursery ground. Larger individuals (>100 mm ML, above maturity stage I) were generally observed more in the southeast of the study domain. Squid size was positively associated with lower minimal water column temperature, higher surface chlorophyll- a concentration, and both the deepest and shallowest layers of the water column. The spatial distribution may be adaptive, helping to reduce inter- and intra-species competition and increase survivorship during early life stages. The reported relationships provide important new insights into the biophysical drivers of pelagic squid habitats around the Southern Ocean. These data significantly increase the known range of several Southern Ocean species and present implications for spawning habitat that warrant further investigation. |
format |
Article in Journal/Newspaper |
author |
Lin, D Walters, A Bestley, S Zhu, G Chen, X Trebilco, R |
author_facet |
Lin, D Walters, A Bestley, S Zhu, G Chen, X Trebilco, R |
author_sort |
Lin, D |
title |
Distribution of larval and juvenile pelagic squids in the Kerguelen Axis region: oceanographic influence on size structure and evidence of spawning locations |
title_short |
Distribution of larval and juvenile pelagic squids in the Kerguelen Axis region: oceanographic influence on size structure and evidence of spawning locations |
title_full |
Distribution of larval and juvenile pelagic squids in the Kerguelen Axis region: oceanographic influence on size structure and evidence of spawning locations |
title_fullStr |
Distribution of larval and juvenile pelagic squids in the Kerguelen Axis region: oceanographic influence on size structure and evidence of spawning locations |
title_full_unstemmed |
Distribution of larval and juvenile pelagic squids in the Kerguelen Axis region: oceanographic influence on size structure and evidence of spawning locations |
title_sort |
distribution of larval and juvenile pelagic squids in the kerguelen axis region: oceanographic influence on size structure and evidence of spawning locations |
publisher |
Pergamon-Elsevier Science Ltd |
publishDate |
2019 |
url |
https://doi.org/10.1016/j.dsr2.2019.07.003 http://ecite.utas.edu.au/134581 |
geographic |
Kerguelen Southern Ocean |
geographic_facet |
Kerguelen Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
http://dx.doi.org/10.1016/j.dsr2.2019.07.003 Lin, D and Walters, A and Bestley, S and Zhu, G and Chen, X and Trebilco, R, Distribution of larval and juvenile pelagic squids in the Kerguelen Axis region: oceanographic influence on size structure and evidence of spawning locations, Deep-Sea Research Part II, 174 Article 104615. ISSN 0967-0645 (2019) [Refereed Article] http://ecite.utas.edu.au/134581 |
op_doi |
https://doi.org/10.1016/j.dsr2.2019.07.003 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
174 |
container_start_page |
104615 |
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1766206058612654080 |