北海道東部沖太平洋大陸斜面における底魚類の分布パターンと優占種の食性
The distribution pattern of demersal fish and food habits of the dominant fish species were studied off the Pacific coast of eastern Hokkaido during the summer of 2003-2004 and the winter of 2005. In summer, the assemblages on the upper continental slope (<400m) were primarily dominated by single...
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北海道大学大学院水産科学研究院
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/33081 2023-05-15T18:32:52+02:00 北海道東部沖太平洋大陸斜面における底魚類の分布パターンと優占種の食性 Distribution Pattern of Demersal Fish and Food Habits of Dominant Fish Species on the Continental Slope off the Pacific Coast of Eastern Hokkaido, Japan 山内, 務巨 濱津, 友紀 大村, 敏昭 髙津, 哲也 高橋, 豊美 http://hdl.handle.net/2115/33081 jpn jpn 北海道大学大学院水産科学研究院 http://hdl.handle.net/2115/33081 北海道大学水産科学研究彙報, 58(1-2): 11-19 Demersal fish Eastern Hokkaido Continental slope Distribution pattern Food 660 bulletin (article) fthokunivhus 2022-11-18T01:01:37Z The distribution pattern of demersal fish and food habits of the dominant fish species were studied off the Pacific coast of eastern Hokkaido during the summer of 2003-2004 and the winter of 2005. In summer, the assemblages on the upper continental slope (<400m) were primarily dominated by single species such as walleye pollock Theragra chalcogramma. The assemblages on the upper-middle slope (400-700m) were dominated by threadfin hakeling Laemonema longipes, longnose eel Synaphobranchus kaupii, and soft eelpout Bothrocara molle. The assemblage on the lower-middle slope (>700m) was dominated by macrourids(chiefly, Coryphaenoides cinereus and C.pectoralis). However, in winter, the boundary between assemblages on the middle slope was obscured slightly by the bathymetric descent of threadfin hakeling from the upper-middle slopes to the lower-middle slopes. Most dominant fish species preyed primarily on nekton, micronekton and zooplankton. However, the dominant fish species utilizing common food organisms belonged to different assemblages. This pattern of assemblage structure is characteristic of weak inter-specific competition for food and appears to be an important factor underlying increased biomass of demersal fish. Article in Journal/Newspaper Theragra chalcogramma Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Pacific |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
Japanese |
topic |
Demersal fish Eastern Hokkaido Continental slope Distribution pattern Food 660 |
spellingShingle |
Demersal fish Eastern Hokkaido Continental slope Distribution pattern Food 660 山内, 務巨 濱津, 友紀 大村, 敏昭 髙津, 哲也 高橋, 豊美 北海道東部沖太平洋大陸斜面における底魚類の分布パターンと優占種の食性 |
topic_facet |
Demersal fish Eastern Hokkaido Continental slope Distribution pattern Food 660 |
description |
The distribution pattern of demersal fish and food habits of the dominant fish species were studied off the Pacific coast of eastern Hokkaido during the summer of 2003-2004 and the winter of 2005. In summer, the assemblages on the upper continental slope (<400m) were primarily dominated by single species such as walleye pollock Theragra chalcogramma. The assemblages on the upper-middle slope (400-700m) were dominated by threadfin hakeling Laemonema longipes, longnose eel Synaphobranchus kaupii, and soft eelpout Bothrocara molle. The assemblage on the lower-middle slope (>700m) was dominated by macrourids(chiefly, Coryphaenoides cinereus and C.pectoralis). However, in winter, the boundary between assemblages on the middle slope was obscured slightly by the bathymetric descent of threadfin hakeling from the upper-middle slopes to the lower-middle slopes. Most dominant fish species preyed primarily on nekton, micronekton and zooplankton. However, the dominant fish species utilizing common food organisms belonged to different assemblages. This pattern of assemblage structure is characteristic of weak inter-specific competition for food and appears to be an important factor underlying increased biomass of demersal fish. |
format |
Article in Journal/Newspaper |
author |
山内, 務巨 濱津, 友紀 大村, 敏昭 髙津, 哲也 高橋, 豊美 |
author_facet |
山内, 務巨 濱津, 友紀 大村, 敏昭 髙津, 哲也 高橋, 豊美 |
author_sort |
山内, 務巨 |
title |
北海道東部沖太平洋大陸斜面における底魚類の分布パターンと優占種の食性 |
title_short |
北海道東部沖太平洋大陸斜面における底魚類の分布パターンと優占種の食性 |
title_full |
北海道東部沖太平洋大陸斜面における底魚類の分布パターンと優占種の食性 |
title_fullStr |
北海道東部沖太平洋大陸斜面における底魚類の分布パターンと優占種の食性 |
title_full_unstemmed |
北海道東部沖太平洋大陸斜面における底魚類の分布パターンと優占種の食性 |
title_sort |
北海道東部沖太平洋大陸斜面における底魚類の分布パターンと優占種の食性 |
publisher |
北海道大学大学院水産科学研究院 |
url |
http://hdl.handle.net/2115/33081 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Theragra chalcogramma |
genre_facet |
Theragra chalcogramma |
op_relation |
http://hdl.handle.net/2115/33081 北海道大学水産科学研究彙報, 58(1-2): 11-19 |
_version_ |
1766217062074548224 |