TWO SERIES OF MACROZOOPLANKTON CATCHES WITH THE N70V NET IN THE INDIAN SECTOR OF THE ANTARCTIC OCEAN (Ninth Symposium on Polar Biology)
Two series of macrozooplankton catches using the Discovery pattern N70V net were studied as a supplement to the previous report by the present author. These samples revealed that both standing crops and individual numbers of three copepod species, Calanus propinquus, Calanoides acutus and Rhincalanu...
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ftnipr:oai:nipr.repo.nii.ac.jp:00005018 2023-05-15T13:49:02+02:00 TWO SERIES OF MACROZOOPLANKTON CATCHES WITH THE N70V NET IN THE INDIAN SECTOR OF THE ANTARCTIC OCEAN (Ninth Symposium on Polar Biology) カワムラ アキト Akito KAWAMURA 1987-12 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5018 http://id.nii.ac.jp/1291/00005018/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5018&item_no=1&attribute_id=18&file_no=1 en eng Proceeding Faculty of Fisheries, Hokkaido University National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5018 http://id.nii.ac.jp/1291/00005018/ AA10819561 Proceedings of the NIPR Symposium on Polar Biology, 1, 84-89(1987-12) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5018&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1987 ftnipr 2023-02-11T20:10:44Z Two series of macrozooplankton catches using the Discovery pattern N70V net were studied as a supplement to the previous report by the present author. These samples revealed that both standing crops and individual numbers of three copepod species, Calanus propinquus, Calanoides acutus and Rhincalanus gigas, were extremely poor in comparison with any other comparable data. The results again make us confirm a possible change of major herbivorous copepod populations in the sizes and/or community structures. These changes are perhaps a phenomenon related to gradual changes in quantitative relationships of relative biomass size between Euphausia superba and their predators, especially through the intense exploitation of rorqual whales during the past several decades, which resulted in a 'surplus' in krill population. A possible intensified competition for food between herbivorous copepods and E. superba is discussed as the subject of feeding strategies. Report Antarc* Antarctic Antarctic Ocean Euphausia superba Polar Biology Proceedings of the NIPR Symposium on Polar Biology Copepods National Institute of Polar Research Repository, Japan Antarctic Antarctic Ocean Indian Rorqual ENVELOPE(-62.311,-62.311,-65.648,-65.648) The Antarctic |
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Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
Two series of macrozooplankton catches using the Discovery pattern N70V net were studied as a supplement to the previous report by the present author. These samples revealed that both standing crops and individual numbers of three copepod species, Calanus propinquus, Calanoides acutus and Rhincalanus gigas, were extremely poor in comparison with any other comparable data. The results again make us confirm a possible change of major herbivorous copepod populations in the sizes and/or community structures. These changes are perhaps a phenomenon related to gradual changes in quantitative relationships of relative biomass size between Euphausia superba and their predators, especially through the intense exploitation of rorqual whales during the past several decades, which resulted in a 'surplus' in krill population. A possible intensified competition for food between herbivorous copepods and E. superba is discussed as the subject of feeding strategies. |
format |
Report |
author |
カワムラ アキト Akito KAWAMURA |
spellingShingle |
カワムラ アキト Akito KAWAMURA TWO SERIES OF MACROZOOPLANKTON CATCHES WITH THE N70V NET IN THE INDIAN SECTOR OF THE ANTARCTIC OCEAN (Ninth Symposium on Polar Biology) |
author_facet |
カワムラ アキト Akito KAWAMURA |
author_sort |
カワムラ アキト |
title |
TWO SERIES OF MACROZOOPLANKTON CATCHES WITH THE N70V NET IN THE INDIAN SECTOR OF THE ANTARCTIC OCEAN (Ninth Symposium on Polar Biology) |
title_short |
TWO SERIES OF MACROZOOPLANKTON CATCHES WITH THE N70V NET IN THE INDIAN SECTOR OF THE ANTARCTIC OCEAN (Ninth Symposium on Polar Biology) |
title_full |
TWO SERIES OF MACROZOOPLANKTON CATCHES WITH THE N70V NET IN THE INDIAN SECTOR OF THE ANTARCTIC OCEAN (Ninth Symposium on Polar Biology) |
title_fullStr |
TWO SERIES OF MACROZOOPLANKTON CATCHES WITH THE N70V NET IN THE INDIAN SECTOR OF THE ANTARCTIC OCEAN (Ninth Symposium on Polar Biology) |
title_full_unstemmed |
TWO SERIES OF MACROZOOPLANKTON CATCHES WITH THE N70V NET IN THE INDIAN SECTOR OF THE ANTARCTIC OCEAN (Ninth Symposium on Polar Biology) |
title_sort |
two series of macrozooplankton catches with the n70v net in the indian sector of the antarctic ocean (ninth symposium on polar biology) |
publisher |
Proceeding |
publishDate |
1987 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5018 http://id.nii.ac.jp/1291/00005018/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5018&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(-62.311,-62.311,-65.648,-65.648) |
geographic |
Antarctic Antarctic Ocean Indian Rorqual The Antarctic |
geographic_facet |
Antarctic Antarctic Ocean Indian Rorqual The Antarctic |
genre |
Antarc* Antarctic Antarctic Ocean Euphausia superba Polar Biology Proceedings of the NIPR Symposium on Polar Biology Copepods |
genre_facet |
Antarc* Antarctic Antarctic Ocean Euphausia superba Polar Biology Proceedings of the NIPR Symposium on Polar Biology Copepods |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5018 http://id.nii.ac.jp/1291/00005018/ AA10819561 Proceedings of the NIPR Symposium on Polar Biology, 1, 84-89(1987-12) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5018&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766250650334658560 |