Distribution of squid and fish in the pelagic zone of the Cosmonaut Sea and Prydz Bay region during the BROKE-West campaign
The composition and distribution of squid and fish collected by Rectangular Midwater Trawls in the upper 200 m were investigated during the BROKE-West (Baseline Research on Oceanography, Krill and the Environment-West) survey (January-March 2006) in CCAMLR Subdivision 58.4.2 of the Southern Ocean. A...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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Language: | English |
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2010
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Online Access: | https://research.wur.nl/en/publications/distribution-of-squid-and-fish-in-the-pelagic-zone-of-the-cosmona https://doi.org/10.1016/j.dsr2.2008.02.015 |
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ftunivwagenin:oai:library.wur.nl:wurpubs/407514 2024-01-14T10:02:12+01:00 Distribution of squid and fish in the pelagic zone of the Cosmonaut Sea and Prydz Bay region during the BROKE-West campaign van de Putte, A.P. Jackson, G.D. Pakhomov, E. Florentino De Souza Silva, A.P. Volckaert, F.A.M. 2010 application/pdf https://research.wur.nl/en/publications/distribution-of-squid-and-fish-in-the-pelagic-zone-of-the-cosmona https://doi.org/10.1016/j.dsr2.2008.02.015 en eng https://edepot.wur.nl/175076 https://research.wur.nl/en/publications/distribution-of-squid-and-fish-in-the-pelagic-zone-of-the-cosmona doi:10.1016/j.dsr2.2008.02.015 info:eu-repo/semantics/restrictedAccess Wageningen University & Research Deep-Sea Research. Part II, tropical studies in oceanography 57 (2010) 9-10 ISSN: 0967-0645 antarctic mesopelagic fishes east antarctica galiteuthis-glacialis macrozooplankton community midwater food web myctophidae peninsula silverfish pleuragramma-antarcticum southern-ocean weddell sea info:eu-repo/semantics/article Article/Letter to editor info:eu-repo/semantics/publishedVersion 2010 ftunivwagenin https://doi.org/10.1016/j.dsr2.2008.02.015 2023-12-20T23:19:03Z The composition and distribution of squid and fish collected by Rectangular Midwater Trawls in the upper 200 m were investigated during the BROKE-West (Baseline Research on Oceanography, Krill and the Environment-West) survey (January-March 2006) in CCAMLR Subdivision 58.4.2 of the Southern Ocean. A total of 332 individuals were collected, with the most abundant fish species being Pleuragramma antarcticum (34%), Notolepis coatsi (27%) and Electrona antarctica (26%); and the most abundant squid being Galiteuthis glacialis (64%). Abundances of all species were among the lowest recorded using this type of gear. Cluster analysis revealed two distinct communities: a notothenioid-dominated coastal community and an oceanic community dominated by mesopelagic fish and squid. Environmental factors related to this segregation were explored using Redundancy Analysis (RDA). The notothenioid P. antarcticum was associated with shallow areas with high chlorophyll a concentrations. Larval stages of E. antarctica, N. coatsi and G. glacialis were found over deeper water and were positively correlated with higher temperatures and a deeper-reaching mixed layer. Postmetamorphic stages of E. antarctica were caught mostly after sunset and were negatively correlated with solar elevation. The observation of higher densities in the eastern part of the sampling area reflects a temporal rather than a geographical effect. Samples of the three most abundant fishes, E. antarctica, P. antarcticum and N. coatsi, were analysed for gut content. All species fed on a variety of mesozooplankton including copepods, amphipods and euphausiids, which is consistent with previous reports on similar life stages. Mean body energy density was highest for E. antarctica (27 kJ g(-1)), while it was similar for P. antarcticum and N. coatsi (22 kJ g(-1)). The high energy content emphasizing the importance as a food resource for top predators in the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctic Antarctica Cosmonaut sea E. Antarctica East Antarctica Prydz Bay Southern Ocean Weddell Sea Copepods Wageningen UR (University & Research Centre): Digital Library Antarctic Southern Ocean Weddell Sea East Antarctica Prydz Bay Weddell Deep Sea Research Part II: Topical Studies in Oceanography 57 9-10 956 967 |
institution |
Open Polar |
collection |
Wageningen UR (University & Research Centre): Digital Library |
op_collection_id |
ftunivwagenin |
language |
English |
topic |
antarctic mesopelagic fishes east antarctica galiteuthis-glacialis macrozooplankton community midwater food web myctophidae peninsula silverfish pleuragramma-antarcticum southern-ocean weddell sea |
spellingShingle |
antarctic mesopelagic fishes east antarctica galiteuthis-glacialis macrozooplankton community midwater food web myctophidae peninsula silverfish pleuragramma-antarcticum southern-ocean weddell sea van de Putte, A.P. Jackson, G.D. Pakhomov, E. Florentino De Souza Silva, A.P. Volckaert, F.A.M. Distribution of squid and fish in the pelagic zone of the Cosmonaut Sea and Prydz Bay region during the BROKE-West campaign |
topic_facet |
antarctic mesopelagic fishes east antarctica galiteuthis-glacialis macrozooplankton community midwater food web myctophidae peninsula silverfish pleuragramma-antarcticum southern-ocean weddell sea |
description |
The composition and distribution of squid and fish collected by Rectangular Midwater Trawls in the upper 200 m were investigated during the BROKE-West (Baseline Research on Oceanography, Krill and the Environment-West) survey (January-March 2006) in CCAMLR Subdivision 58.4.2 of the Southern Ocean. A total of 332 individuals were collected, with the most abundant fish species being Pleuragramma antarcticum (34%), Notolepis coatsi (27%) and Electrona antarctica (26%); and the most abundant squid being Galiteuthis glacialis (64%). Abundances of all species were among the lowest recorded using this type of gear. Cluster analysis revealed two distinct communities: a notothenioid-dominated coastal community and an oceanic community dominated by mesopelagic fish and squid. Environmental factors related to this segregation were explored using Redundancy Analysis (RDA). The notothenioid P. antarcticum was associated with shallow areas with high chlorophyll a concentrations. Larval stages of E. antarctica, N. coatsi and G. glacialis were found over deeper water and were positively correlated with higher temperatures and a deeper-reaching mixed layer. Postmetamorphic stages of E. antarctica were caught mostly after sunset and were negatively correlated with solar elevation. The observation of higher densities in the eastern part of the sampling area reflects a temporal rather than a geographical effect. Samples of the three most abundant fishes, E. antarctica, P. antarcticum and N. coatsi, were analysed for gut content. All species fed on a variety of mesozooplankton including copepods, amphipods and euphausiids, which is consistent with previous reports on similar life stages. Mean body energy density was highest for E. antarctica (27 kJ g(-1)), while it was similar for P. antarcticum and N. coatsi (22 kJ g(-1)). The high energy content emphasizing the importance as a food resource for top predators in the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
van de Putte, A.P. Jackson, G.D. Pakhomov, E. Florentino De Souza Silva, A.P. Volckaert, F.A.M. |
author_facet |
van de Putte, A.P. Jackson, G.D. Pakhomov, E. Florentino De Souza Silva, A.P. Volckaert, F.A.M. |
author_sort |
van de Putte, A.P. |
title |
Distribution of squid and fish in the pelagic zone of the Cosmonaut Sea and Prydz Bay region during the BROKE-West campaign |
title_short |
Distribution of squid and fish in the pelagic zone of the Cosmonaut Sea and Prydz Bay region during the BROKE-West campaign |
title_full |
Distribution of squid and fish in the pelagic zone of the Cosmonaut Sea and Prydz Bay region during the BROKE-West campaign |
title_fullStr |
Distribution of squid and fish in the pelagic zone of the Cosmonaut Sea and Prydz Bay region during the BROKE-West campaign |
title_full_unstemmed |
Distribution of squid and fish in the pelagic zone of the Cosmonaut Sea and Prydz Bay region during the BROKE-West campaign |
title_sort |
distribution of squid and fish in the pelagic zone of the cosmonaut sea and prydz bay region during the broke-west campaign |
publishDate |
2010 |
url |
https://research.wur.nl/en/publications/distribution-of-squid-and-fish-in-the-pelagic-zone-of-the-cosmona https://doi.org/10.1016/j.dsr2.2008.02.015 |
geographic |
Antarctic Southern Ocean Weddell Sea East Antarctica Prydz Bay Weddell |
geographic_facet |
Antarctic Southern Ocean Weddell Sea East Antarctica Prydz Bay Weddell |
genre |
Antarc* Antarctic Antarctica Cosmonaut sea E. Antarctica East Antarctica Prydz Bay Southern Ocean Weddell Sea Copepods |
genre_facet |
Antarc* Antarctic Antarctica Cosmonaut sea E. Antarctica East Antarctica Prydz Bay Southern Ocean Weddell Sea Copepods |
op_source |
Deep-Sea Research. Part II, tropical studies in oceanography 57 (2010) 9-10 ISSN: 0967-0645 |
op_relation |
https://edepot.wur.nl/175076 https://research.wur.nl/en/publications/distribution-of-squid-and-fish-in-the-pelagic-zone-of-the-cosmona doi:10.1016/j.dsr2.2008.02.015 |
op_rights |
info:eu-repo/semantics/restrictedAccess Wageningen University & Research |
op_doi |
https://doi.org/10.1016/j.dsr2.2008.02.015 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
57 |
container_issue |
9-10 |
container_start_page |
956 |
op_container_end_page |
967 |
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1788057094648233984 |