紀伊水道東部海域における稚アユ資源量の推定

• 吉本 洋

  和歌山県農林水産総合技術センター水産試験場

• 高橋 芳明

  和歌山県農林水産総合技術センター水産試験場

書誌事項

タイトル別名

• Estimation of Population Size of Juvenile Ayu in the Eastern Coastal Waters Facing Kii Channel
• キイスイドウ トウブ カイイキ ニ オケル チアユ シゲンリョウ ノ スイテイ

抄録

Using the method of DeLury, the initial population size (N₀) of marine juvenile ayu (Plecoglossus altivelis altivelis) in the eastern coastal waters of Kii Channel was estimated as 376-4949 (×10⁴) from 1991 to 2004. Annual estimations of the initial population size (N₀) fluctuated widely, indicating that the stock is in an unstable condition. Exploitation rate (C/N₀) ranged from 0.65 to 0.87, and was over 0.7 in most years. Significant positive correlations were found between the initial population size (N₀) and total catch in number of individuals (C), as well as between the initial population size (N₀) and remaining number of individuals (N₀-C) . As the annual quantity of down-wept ayu larvae in the Hidaka River increased the following year's initial population size (N₀) tended to increase. These results suggest that increasing the quantity of down-wept larvae and catch control of juveniles are effective to maintain stability of the stock.

収録刊行物

• 水産増殖

  水産増殖 54 (3), 341-346, 2006

  日本水産増殖学会

キーワード

• <I>Plecoglossus altivelis altivelis</I>
• Ayu
• DeLury's method
• Population size

詳細情報

• CRID: 1390001204718030976
• NII論文ID: 10018255506
• NII書誌ID: AN00124667
• DOI: 10.11233/aquaculturesci1953.54.341
• ISSN: 21850194
• ISSN: 03714217
• NDL書誌ID: 8522154
• Web Site: https://agriknowledge.affrc.go.jp/RN/2010731261
• Web Site: http://id.ndl.go.jp/bib/8522154
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8522154
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • IRDB
  • NDL
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可