Feeding ecology of Antarctic toothfish, Dissostichus mawsoni in the subarea 88.3 (Bellingshausen Sea and eastern Amundsen Sea) of the Southern Ocean
Understanding feeding ecology is essential for ecosystem-based management. As dietary data can show differences depending on the spatiotemporal and ontogenetic aspects of the sample, the results should be derived based on various size classes and samples over a wide spatiotemporal range. Morphologic...
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Frontiers Media S.A.
2023
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Online Access: | https://doi.org/10.3389/fmars.2023.1240569 https://doaj.org/article/3d74f26fbfad429b8dc80a1503273901 |
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ftdoajarticles:oai:doaj.org/article:3d74f26fbfad429b8dc80a1503273901 2024-01-14T09:59:09+01:00 Feeding ecology of Antarctic toothfish, Dissostichus mawsoni in the subarea 88.3 (Bellingshausen Sea and eastern Amundsen Sea) of the Southern Ocean Gi Chang Seong Sangdeok Chung Do-Gyun Kim Da Yeon Kang Suyeon Jin Gun Wook Baeck 2023-12-01T00:00:00Z https://doi.org/10.3389/fmars.2023.1240569 https://doaj.org/article/3d74f26fbfad429b8dc80a1503273901 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2023.1240569/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1240569 https://doaj.org/article/3d74f26fbfad429b8dc80a1503273901 Frontiers in Marine Science, Vol 10 (2023) Antarctic toothfish feeding ecology Southern Ocean CCAMLR food web Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2023 ftdoajarticles https://doi.org/10.3389/fmars.2023.1240569 2023-12-17T01:43:53Z Understanding feeding ecology is essential for ecosystem-based management. As dietary data can show differences depending on the spatiotemporal and ontogenetic aspects of the sample, the results should be derived based on various size classes and samples over a wide spatiotemporal range. Morphological analysis of the stomach contents of Dissostichus mawsoni, a piscivore, collected at depths of 603–2,113 m in subarea 88.3 during the Antarctic summer fishing seasons from 2016 to 2020 was used to assess the dietary composition according to the research block, fishing season, depth, and size. Here, we used 1,639 D. mawsoni specimens with a total length range of 44.5–189.0 cm. The dietary composition of D. mawsoni did not show significant differences by fishing season but differed with research block, depth, and size. Macrouridae dominated research blocks 88.3_1 and 88.3_3; Nototheniidae dominated research blocks 88.3_2 and 88.3_6; and Channichthyidae dominated research blocks 88.3_4 and 88.3_5. The proportion of Nototheniidae decreased as depth increased, whereas the consumption of Channichthyidae increased gradually with depth in research blocks 88.3_3 and 88.3_4. The proportion of Channichthyidae decreased as body size increased, whereas the consumption of Macrouridae increased gradually with body size in both blocks 88.3_3 and 88.3_4. During the study period, the dietary composition of D. mawsoni in both blocks 88.3_3 and 88.3_4 did not show significant temporal differences, suggesting that these data could be used as a baseline for identifying future environmental changes in the region. This study provides information on the relationships between various species and benthic fish fauna, which are essential for ecosystem-based management. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctic Toothfish Bellingshausen Sea Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean The Antarctic Amundsen Sea Bellingshausen Sea Frontiers in Marine Science 10 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctic toothfish feeding ecology Southern Ocean CCAMLR food web Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
Antarctic toothfish feeding ecology Southern Ocean CCAMLR food web Science Q General. Including nature conservation geographical distribution QH1-199.5 Gi Chang Seong Sangdeok Chung Do-Gyun Kim Da Yeon Kang Suyeon Jin Gun Wook Baeck Feeding ecology of Antarctic toothfish, Dissostichus mawsoni in the subarea 88.3 (Bellingshausen Sea and eastern Amundsen Sea) of the Southern Ocean |
topic_facet |
Antarctic toothfish feeding ecology Southern Ocean CCAMLR food web Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Understanding feeding ecology is essential for ecosystem-based management. As dietary data can show differences depending on the spatiotemporal and ontogenetic aspects of the sample, the results should be derived based on various size classes and samples over a wide spatiotemporal range. Morphological analysis of the stomach contents of Dissostichus mawsoni, a piscivore, collected at depths of 603–2,113 m in subarea 88.3 during the Antarctic summer fishing seasons from 2016 to 2020 was used to assess the dietary composition according to the research block, fishing season, depth, and size. Here, we used 1,639 D. mawsoni specimens with a total length range of 44.5–189.0 cm. The dietary composition of D. mawsoni did not show significant differences by fishing season but differed with research block, depth, and size. Macrouridae dominated research blocks 88.3_1 and 88.3_3; Nototheniidae dominated research blocks 88.3_2 and 88.3_6; and Channichthyidae dominated research blocks 88.3_4 and 88.3_5. The proportion of Nototheniidae decreased as depth increased, whereas the consumption of Channichthyidae increased gradually with depth in research blocks 88.3_3 and 88.3_4. The proportion of Channichthyidae decreased as body size increased, whereas the consumption of Macrouridae increased gradually with body size in both blocks 88.3_3 and 88.3_4. During the study period, the dietary composition of D. mawsoni in both blocks 88.3_3 and 88.3_4 did not show significant temporal differences, suggesting that these data could be used as a baseline for identifying future environmental changes in the region. This study provides information on the relationships between various species and benthic fish fauna, which are essential for ecosystem-based management. |
format |
Article in Journal/Newspaper |
author |
Gi Chang Seong Sangdeok Chung Do-Gyun Kim Da Yeon Kang Suyeon Jin Gun Wook Baeck |
author_facet |
Gi Chang Seong Sangdeok Chung Do-Gyun Kim Da Yeon Kang Suyeon Jin Gun Wook Baeck |
author_sort |
Gi Chang Seong |
title |
Feeding ecology of Antarctic toothfish, Dissostichus mawsoni in the subarea 88.3 (Bellingshausen Sea and eastern Amundsen Sea) of the Southern Ocean |
title_short |
Feeding ecology of Antarctic toothfish, Dissostichus mawsoni in the subarea 88.3 (Bellingshausen Sea and eastern Amundsen Sea) of the Southern Ocean |
title_full |
Feeding ecology of Antarctic toothfish, Dissostichus mawsoni in the subarea 88.3 (Bellingshausen Sea and eastern Amundsen Sea) of the Southern Ocean |
title_fullStr |
Feeding ecology of Antarctic toothfish, Dissostichus mawsoni in the subarea 88.3 (Bellingshausen Sea and eastern Amundsen Sea) of the Southern Ocean |
title_full_unstemmed |
Feeding ecology of Antarctic toothfish, Dissostichus mawsoni in the subarea 88.3 (Bellingshausen Sea and eastern Amundsen Sea) of the Southern Ocean |
title_sort |
feeding ecology of antarctic toothfish, dissostichus mawsoni in the subarea 88.3 (bellingshausen sea and eastern amundsen sea) of the southern ocean |
publisher |
Frontiers Media S.A. |
publishDate |
2023 |
url |
https://doi.org/10.3389/fmars.2023.1240569 https://doaj.org/article/3d74f26fbfad429b8dc80a1503273901 |
geographic |
Antarctic Southern Ocean The Antarctic Amundsen Sea Bellingshausen Sea |
geographic_facet |
Antarctic Southern Ocean The Antarctic Amundsen Sea Bellingshausen Sea |
genre |
Amundsen Sea Antarc* Antarctic Antarctic Toothfish Bellingshausen Sea Southern Ocean |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctic Toothfish Bellingshausen Sea Southern Ocean |
op_source |
Frontiers in Marine Science, Vol 10 (2023) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2023.1240569/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1240569 https://doaj.org/article/3d74f26fbfad429b8dc80a1503273901 |
op_doi |
https://doi.org/10.3389/fmars.2023.1240569 |
container_title |
Frontiers in Marine Science |
container_volume |
10 |
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1788056813995819008 |