COMPARATIVE MORPHOLOGY OF FILTERING STRUCTURE OF FIVE SPECIES OF EUPHAUSIA (EUPHAUSIACEA, CRUSTACEA) FROM THE ANTARCTIC OCEAN (Ninth Symposium on Polar Biology)
Morphology of the filtering apparatus, in particular mesh size and filtering area, of five Euphausla species was investigated. Mesh sizes and filtering areas were measured utilizing an SEM. Among adult krill the filtering areas vary from 17.7 mm^2 in E. frigida to 276.8 mm^2 in E. superba. By applyi...
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ftnipr:oai:nipr.repo.nii.ac.jp:00005017 2023-05-15T13:49:02+02:00 COMPARATIVE MORPHOLOGY OF FILTERING STRUCTURE OF FIVE SPECIES OF EUPHAUSIA (EUPHAUSIACEA, CRUSTACEA) FROM THE ANTARCTIC OCEAN (Ninth Symposium on Polar Biology) Hae-Lip SUH Takahisa NEMOTO 1987-12 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5017 http://id.nii.ac.jp/1291/00005017/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5017&item_no=1&attribute_id=18&file_no=1 en eng Proceeding Ocean Research Institute, University of Tokyo National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5017 http://id.nii.ac.jp/1291/00005017/ AA10819561 Proceedings of the NIPR Symposium on Polar Biology, 1, 72-83(1987-12) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5017&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1987 ftnipr 2023-02-11T20:10:44Z Morphology of the filtering apparatus, in particular mesh size and filtering area, of five Euphausla species was investigated. Mesh sizes and filtering areas were measured utilizing an SEM. Among adult krill the filtering areas vary from 17.7 mm^2 in E. frigida to 276.8 mm^2 in E. superba. By applying sieve hypothesis, it is proposed that the presumptive lower limits of filterable particle sizes based on the morphology of fine filter meshes range 2-3 μm in E. superba, 8-11 μm in E. vallentini, 15-19 μm in E. frigida, 16-23 μm in E. crystallorophias and 27-39 μm in E. triacantha. In E. superba, the filter mesh sizes do not increase considerably with growth. In E. triacantha, the mean secondary setal distances increase from 28-37 μm to 41-56 μm. Species can be grouped according to the mesh sizes and filtering area; i) fine mesh filter feeder represented by E. superba; ii) medium mesh filter feeders such as E. vallentini, E. crystallorophias and E. frigida; and iii) coarse mesh filter feeder, E. triacantha. Potential food size spectra of these Euphausia species are discussed. Report Antarc* Antarctic Antarctic Ocean Polar Biology Proceedings of the NIPR Symposium on Polar Biology National Institute of Polar Research Repository, Japan Antarctic Antarctic Ocean The Antarctic |
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Open Polar |
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National Institute of Polar Research Repository, Japan |
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ftnipr |
language |
English |
description |
Morphology of the filtering apparatus, in particular mesh size and filtering area, of five Euphausla species was investigated. Mesh sizes and filtering areas were measured utilizing an SEM. Among adult krill the filtering areas vary from 17.7 mm^2 in E. frigida to 276.8 mm^2 in E. superba. By applying sieve hypothesis, it is proposed that the presumptive lower limits of filterable particle sizes based on the morphology of fine filter meshes range 2-3 μm in E. superba, 8-11 μm in E. vallentini, 15-19 μm in E. frigida, 16-23 μm in E. crystallorophias and 27-39 μm in E. triacantha. In E. superba, the filter mesh sizes do not increase considerably with growth. In E. triacantha, the mean secondary setal distances increase from 28-37 μm to 41-56 μm. Species can be grouped according to the mesh sizes and filtering area; i) fine mesh filter feeder represented by E. superba; ii) medium mesh filter feeders such as E. vallentini, E. crystallorophias and E. frigida; and iii) coarse mesh filter feeder, E. triacantha. Potential food size spectra of these Euphausia species are discussed. |
format |
Report |
author |
Hae-Lip SUH Takahisa NEMOTO |
spellingShingle |
Hae-Lip SUH Takahisa NEMOTO COMPARATIVE MORPHOLOGY OF FILTERING STRUCTURE OF FIVE SPECIES OF EUPHAUSIA (EUPHAUSIACEA, CRUSTACEA) FROM THE ANTARCTIC OCEAN (Ninth Symposium on Polar Biology) |
author_facet |
Hae-Lip SUH Takahisa NEMOTO |
author_sort |
Hae-Lip SUH |
title |
COMPARATIVE MORPHOLOGY OF FILTERING STRUCTURE OF FIVE SPECIES OF EUPHAUSIA (EUPHAUSIACEA, CRUSTACEA) FROM THE ANTARCTIC OCEAN (Ninth Symposium on Polar Biology) |
title_short |
COMPARATIVE MORPHOLOGY OF FILTERING STRUCTURE OF FIVE SPECIES OF EUPHAUSIA (EUPHAUSIACEA, CRUSTACEA) FROM THE ANTARCTIC OCEAN (Ninth Symposium on Polar Biology) |
title_full |
COMPARATIVE MORPHOLOGY OF FILTERING STRUCTURE OF FIVE SPECIES OF EUPHAUSIA (EUPHAUSIACEA, CRUSTACEA) FROM THE ANTARCTIC OCEAN (Ninth Symposium on Polar Biology) |
title_fullStr |
COMPARATIVE MORPHOLOGY OF FILTERING STRUCTURE OF FIVE SPECIES OF EUPHAUSIA (EUPHAUSIACEA, CRUSTACEA) FROM THE ANTARCTIC OCEAN (Ninth Symposium on Polar Biology) |
title_full_unstemmed |
COMPARATIVE MORPHOLOGY OF FILTERING STRUCTURE OF FIVE SPECIES OF EUPHAUSIA (EUPHAUSIACEA, CRUSTACEA) FROM THE ANTARCTIC OCEAN (Ninth Symposium on Polar Biology) |
title_sort |
comparative morphology of filtering structure of five species of euphausia (euphausiacea, crustacea) from the antarctic ocean (ninth symposium on polar biology) |
publisher |
Proceeding |
publishDate |
1987 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5017 http://id.nii.ac.jp/1291/00005017/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5017&item_no=1&attribute_id=18&file_no=1 |
geographic |
Antarctic Antarctic Ocean The Antarctic |
geographic_facet |
Antarctic Antarctic Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Ocean Polar Biology Proceedings of the NIPR Symposium on Polar Biology |
genre_facet |
Antarc* Antarctic Antarctic Ocean Polar Biology Proceedings of the NIPR Symposium on Polar Biology |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5017 http://id.nii.ac.jp/1291/00005017/ AA10819561 Proceedings of the NIPR Symposium on Polar Biology, 1, 72-83(1987-12) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5017&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766250650156400640 |