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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Main Author: Haruto Ishii
Format: Report
Language:English
Published: Tokyo University of Fisheries 1986
Subjects:
Online Access:https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2035
http://id.nii.ac.jp/1291/00002035/
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spelling 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
institution Open Polar
collection 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
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