北部日本海中層に生息するスケトウダラの春季と秋季における食性

• 小岡 孝治

  北海道大学水産学部

• 高津 哲也

  北海道大学水産学部

• 亀井 佳彦

  北海道大学水産学部

• 中谷 敏邦

  北海道大学水産学部

• 高橋 豊美

  北海道大学水産学部

書誌事項

タイトル別名

• Food Habits of Walleye Pollock Inhabiting the Mesopelagic Zone in the Northern Japan Sea in Spring and Autumn.
• ホクブ ニホンカイ チュウソウ ニ セイソクスル スケトウダラ ノ シュンキ

抄録

The diet and feeding intensity of walleye pollock Theragra chalcogramma were investigated in April and October 1993, and in April 1994. Specimens ranging from 262 to 456mm in standard length were sampled with a mid-water trawl off Hiyama Subprefecture and Aomori Prefecture in the northern Japan Sea. The main food items were large-sized zooplankton. In April, pollock fed chiefly on euphausiids (Thysanoessa longipes), chaetognaths, and hyperiid amphipods (Themisto japonica). In October, the main food organisms were hyperiid amphipods (T. japonica). Stomach-content weight indices indicated that the feeding intensity of pollock was stronger in April (after spawning) than in October (before spawning). The numerical compositions of food categories in April differed among sampling stations. Such differences were not observed in October. It seems likely that the distinct variation of diets in April is ascribed to geographic differences in zooplankton composition in the mesopelagic zone.

収録刊行物

• 日本水産学会誌

  日本水産学会誌 63 (4), 537-541, 1997

  公益社団法人 日本水産学会

キーワード

• スケトウダラ
• 食性
• 摂餌強度
• 日本海
• オキアミ類
• 毛顎類
• 端脚類

詳細情報

• CRID: 1390001206411824512
• NII論文ID: 10004851403
• NII書誌ID: AN00193422
• DOI: 10.2331/suisan.63.537
• ISSN: 1349998X
• ISSN: 00215392
• HANDLE: 2115/38819
• NDL書誌ID: 4258508
• Web Site: https://agriknowledge.affrc.go.jp/RN/2030570423
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4258508
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可