雑魚川源流域におけるニジマスとイワナの生態的特徴

• 北野, 聡

• 河合, 吉図

• 井田, 秀行

書誌事項

タイトル別名

• Ecological aspects of rainbow trout and white-spotted char in a headwater tributary of Zako stream, central Japan.
• ザコガワ ゲンリュウイキ ニ オケル ニジマス ト イワナ ノ セイタイテキ トクチョウ

抄録

Diet, growth and sexual maturity of introduced rainbow trout (Oncorhynchus mykiss) were studied in a headwater tributary of Zako stream, central Japan, where white-spotted char (Salvelinus leucomaenis) were indigenous. Sexually matured rainbow trout (22-26 cm TL and age 3 + ) were caught in mid-April. They fed primary on aquatic invertebrates, but fries of native char were also detected in the trout diet. Our results suggest that introduced rainbow trout may be crucial competitor and predator suppressing native char populations.

Article

信州大学教育学部附属志賀自然教育研究施設研究業績 40: 9-13(2003)

収録刊行物

• 信州大学教育学部附属志賀自然教育研究施設研究業績

  信州大学教育学部附属志賀自然教育研究施設研究業績 40 9-13, 2003-03-25

  信州大学教育学部

詳細情報

• CRID: 1050001338913172992
• NII論文ID: 110004677873
• NII書誌ID: AA11520449
• ISSN: 03899128
• HANDLE: 10091/2061
• NDL書誌ID: 6519731
• Web Site: https://soar-ir.repo.nii.ac.jp/records/2222
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6519731
• 本文言語コード: ja
• 資料種別: departmental bulletin paper
• データソース種別:
  • IRDB
  • NDL
  • CiNii Articles