Some observations on the feeding activity of Antarctic krill in the Indian Sector of the Antarctic Ocean
The BIOMASS FIBEX Cruise of R/V KAIYO MARU in the Indian Sector of the Antarctic Ocean was conducted from 11 November, 1980 to 18 March, 1981. The investigation could be subdivided into three stages on the basis of the area and the duration : Investigation I (11-26 December, 1980; Long. 60-85°E), In...
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National Institute of Polar Research
1983
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ftdoajarticles:oai:doaj.org/article:6ecc9bf980f44f95b0b5028b041441a7 2023-05-15T13:39:51+02:00 Some observations on the feeding activity of Antarctic krill in the Indian Sector of the Antarctic Ocean Shozo Sawamoto Tsukasa Kikuno JunIchi Sugai Yuzo Komaki 1983-01-01T00:00:00Z https://doi.org/10.15094/00008336 https://doaj.org/article/6ecc9bf980f44f95b0b5028b041441a7 EN JA eng jpn National Institute of Polar Research https://doi.org/10.15094/00008336 https://doaj.org/toc/0085-7289 https://doaj.org/toc/2432-079X doi:10.15094/00008336 0085-7289 2432-079X https://doaj.org/article/6ecc9bf980f44f95b0b5028b041441a7 Antarctic Record, Iss 77, Pp 44-54 (1983) Geography (General) G1-922 article 1983 ftdoajarticles https://doi.org/10.15094/00008336 2022-12-30T22:07:33Z The BIOMASS FIBEX Cruise of R/V KAIYO MARU in the Indian Sector of the Antarctic Ocean was conducted from 11 November, 1980 to 18 March, 1981. The investigation could be subdivided into three stages on the basis of the area and the duration : Investigation I (11-26 December, 1980; Long. 60-85°E), Investigation II (16-30 January, 1981; Long. 30-55°E) and Investigation III (31 January-6 February, 1981; Long. 60-70°E). Feeding activity of the Antarctic krill, Euphausia superba DANA, was studied regarding the sexual maturation by examining the digestive tract contents. It seemed that feeding of the krill was active two times a day. In Investigation I the active period of feeding was between 00 and 03h and 12 and 15h or between 12 and 18h in both sexes. With the advance of time (Investigation III) the active period of feeding was different between sexes, and the feeding activity varied little in mature female. From the present examination it was difficult to confirm the relation between the population density causing vertical migration and the feeding activity. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctic Ocean Euphausia superba Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Indian Antarctic Ocean |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Japanese |
topic |
Geography (General) G1-922 |
spellingShingle |
Geography (General) G1-922 Shozo Sawamoto Tsukasa Kikuno JunIchi Sugai Yuzo Komaki Some observations on the feeding activity of Antarctic krill in the Indian Sector of the Antarctic Ocean |
topic_facet |
Geography (General) G1-922 |
description |
The BIOMASS FIBEX Cruise of R/V KAIYO MARU in the Indian Sector of the Antarctic Ocean was conducted from 11 November, 1980 to 18 March, 1981. The investigation could be subdivided into three stages on the basis of the area and the duration : Investigation I (11-26 December, 1980; Long. 60-85°E), Investigation II (16-30 January, 1981; Long. 30-55°E) and Investigation III (31 January-6 February, 1981; Long. 60-70°E). Feeding activity of the Antarctic krill, Euphausia superba DANA, was studied regarding the sexual maturation by examining the digestive tract contents. It seemed that feeding of the krill was active two times a day. In Investigation I the active period of feeding was between 00 and 03h and 12 and 15h or between 12 and 18h in both sexes. With the advance of time (Investigation III) the active period of feeding was different between sexes, and the feeding activity varied little in mature female. From the present examination it was difficult to confirm the relation between the population density causing vertical migration and the feeding activity. |
format |
Article in Journal/Newspaper |
author |
Shozo Sawamoto Tsukasa Kikuno JunIchi Sugai Yuzo Komaki |
author_facet |
Shozo Sawamoto Tsukasa Kikuno JunIchi Sugai Yuzo Komaki |
author_sort |
Shozo Sawamoto |
title |
Some observations on the feeding activity of Antarctic krill in the Indian Sector of the Antarctic Ocean |
title_short |
Some observations on the feeding activity of Antarctic krill in the Indian Sector of the Antarctic Ocean |
title_full |
Some observations on the feeding activity of Antarctic krill in the Indian Sector of the Antarctic Ocean |
title_fullStr |
Some observations on the feeding activity of Antarctic krill in the Indian Sector of the Antarctic Ocean |
title_full_unstemmed |
Some observations on the feeding activity of Antarctic krill in the Indian Sector of the Antarctic Ocean |
title_sort |
some observations on the feeding activity of antarctic krill in the indian sector of the antarctic ocean |
publisher |
National Institute of Polar Research |
publishDate |
1983 |
url |
https://doi.org/10.15094/00008336 https://doaj.org/article/6ecc9bf980f44f95b0b5028b041441a7 |
geographic |
Antarctic The Antarctic Indian Antarctic Ocean |
geographic_facet |
Antarctic The Antarctic Indian Antarctic Ocean |
genre |
Antarc* Antarctic Antarctic Krill Antarctic Ocean Euphausia superba |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctic Ocean Euphausia superba |
op_source |
Antarctic Record, Iss 77, Pp 44-54 (1983) |
op_relation |
https://doi.org/10.15094/00008336 https://doaj.org/toc/0085-7289 https://doaj.org/toc/2432-079X doi:10.15094/00008336 0085-7289 2432-079X https://doaj.org/article/6ecc9bf980f44f95b0b5028b041441a7 |
op_doi |
https://doi.org/10.15094/00008336 |
_version_ |
1766125462272081920 |