Deformity of agglutinated pelvic fin membrane in hatchery-reared black rockfish Sebastes inermis and its application for stock separation study

• MURAKAMI TOMOYA

  Hiroshima Prefectural Fisheries Experimental Station Graduate School of Biosphere Science, Hiroshima University

• AIDA SATOSHI

  Hiroshima Prefectural Fisheries Experimental Station

• YOSHIOKA KOUJI

  Graduate School of Biosphere Science, Hiroshima University Hiroshima Prefectural Bisan Regional Office

• UMINO TETSUYA

  Graduate School of Biosphere Science, Hiroshima University

• NAKAGAWA HEISUKE

  Graduate School of Biosphere Science, Hiroshima University

抄録

This study is the first to report on the high occurrence of agglutinated pelvic fin membrane deformities in hatchery-reared black rockfish Sebastes inermis. For 5 years, this symptom was marked in hatchery-reared fish, with 58.7% of fish deformed on average (varying between 46.7 and 72.0%). The deformity was a peculiarity in hatchery-reared fish, but is negated in wild fish, and was not related to whether the fish broodstock originated from the wild or from a hatchery. Mark-release experiments showed that deformed fish were almost the same as normal hatchery-reared fish in growth and survival rates, and, theoretically, the recapture numbers of hatchery-stocked fish, estimated by deformity, almost coincided with actual recapture numbers, confirmed by otolith tagging. The results of the present study indicate that deformity in hatchery-reared black rockfish is useful as a stock separation tool.

収録刊行物

• Ｆｉｓｈｅｒｉｅｓ　ｓｃｉｅｎｃｅ

  Ｆｉｓｈｅｒｉｅｓ　ｓｃｉｅｎｃｅ 70 (5), 839-844, 2004

  公益社団法人 日本水産学会

キーワード

• black rockfish
• deformity
• otolith tagging
• pelvic fin
• stock separation

詳細情報

• CRID: 1390282679405471872
• NII論文ID: 130003904110
• DOI: 10.1111/j.1444-2906.2004.00877.x
• COI: 1:CAS:528:DC%2BD2cXptlOrs7c%3D
• ISSN: 14442906
• ISSN: 09199268
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可