Feeding behavior of the Antarctic krill, Euphausia superba DANA. II. Effects of food condition on particle selectivity
Effects of particle size distribution, total particle concentration, and animal size on selective feeding of the Antarctic krill, Euphausia superba DANA, were studied using natural particles as food. Percent particle retention efficiency calculated from the filtering rate for each particle size spec...
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Tokyo University of Fisheries
1986
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ftnipr:oai:nipr.repo.nii.ac.jp:00002035 2023-05-15T13:47:59+02:00 Feeding behavior of the Antarctic krill, Euphausia superba DANA. II. Effects of food condition on particle selectivity Haruto Ishii 1986-12 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2035 http://id.nii.ac.jp/1291/00002035/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2035&item_no=1&attribute_id=18&file_no=1 en eng Tokyo University of Fisheries https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2035 http://id.nii.ac.jp/1291/00002035/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 44, 96-106(1986-12) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2035&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1986 ftnipr 2022-11-12T19:42:52Z Effects of particle size distribution, total particle concentration, and animal size on selective feeding of the Antarctic krill, Euphausia superba DANA, were studied using natural particles as food. Percent particle retention efficiency calculated from the filtering rate for each particle size spectrum increased abruptly for large size particles. This selective feeding for large particles was apparent regardless of abundance of smaller particles. However, the minimum particle size with 50% retention efficiency (half-retention size) increased with increasing total particle concentration. These results suggest that the feeding of the krill shows intensive selection for large particles when food is abundant, but its feeding is rather passive when food is scarce. This flexible feeding seems to be an adaptive behavior to obtain the energy more effectively in the food scarce ocean. Report Antarc* Antarctic Antarctic Krill Euphausia superba Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan Antarctic The Antarctic |
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Open Polar |
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National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
Effects of particle size distribution, total particle concentration, and animal size on selective feeding of the Antarctic krill, Euphausia superba DANA, were studied using natural particles as food. Percent particle retention efficiency calculated from the filtering rate for each particle size spectrum increased abruptly for large size particles. This selective feeding for large particles was apparent regardless of abundance of smaller particles. However, the minimum particle size with 50% retention efficiency (half-retention size) increased with increasing total particle concentration. These results suggest that the feeding of the krill shows intensive selection for large particles when food is abundant, but its feeding is rather passive when food is scarce. This flexible feeding seems to be an adaptive behavior to obtain the energy more effectively in the food scarce ocean. |
format |
Report |
author |
Haruto Ishii |
spellingShingle |
Haruto Ishii Feeding behavior of the Antarctic krill, Euphausia superba DANA. II. Effects of food condition on particle selectivity |
author_facet |
Haruto Ishii |
author_sort |
Haruto Ishii |
title |
Feeding behavior of the Antarctic krill, Euphausia superba DANA. II. Effects of food condition on particle selectivity |
title_short |
Feeding behavior of the Antarctic krill, Euphausia superba DANA. II. Effects of food condition on particle selectivity |
title_full |
Feeding behavior of the Antarctic krill, Euphausia superba DANA. II. Effects of food condition on particle selectivity |
title_fullStr |
Feeding behavior of the Antarctic krill, Euphausia superba DANA. II. Effects of food condition on particle selectivity |
title_full_unstemmed |
Feeding behavior of the Antarctic krill, Euphausia superba DANA. II. Effects of food condition on particle selectivity |
title_sort |
feeding behavior of the antarctic krill, euphausia superba dana. ii. effects of food condition on particle selectivity |
publisher |
Tokyo University of Fisheries |
publishDate |
1986 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2035 http://id.nii.ac.jp/1291/00002035/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2035&item_no=1&attribute_id=18&file_no=1 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba Memoirs of National Institute of Polar Research Polar Research |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2035 http://id.nii.ac.jp/1291/00002035/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 44, 96-106(1986-12) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2035&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766248339107479552 |