水槽実験によるトヤマエビ<i>Pandalus hypsinotus</i>に対するかご漁具の網目選択性の推定

DOI 日本農学文献記事索引 Web Site オープンアクセス

書誌事項

タイトル別名
  • Estimating Pot Mesh Selectivity for Corn Stripe Shrimp <i>Pandalus hypsinotus</i> by Water Tank Experiment
  • 水槽実験によるトヤマエビPandalus hypsinotusに対するかご漁具の網目選択性の推定
  • スイソウ ジッケン ニ ヨル トヤマエビ Pandalus hypsinotus ニ タイスル カゴギョグ ノ アミメ センタクセイ ノ スイテイ

この論文をさがす

抄録

<p>The stock level of cone stripe shrimp Pandalus hypsinotus in Funka-Bay of Hokkaido has been estimated to be medium level in recent years; however, because most of the catch is occupied by small individuals, the protection of young shrimp is still an important issue. In this study, we investigated mesh selectivity for several stretched mesh size (32, 35, 39, 43, 46, 52, 65 mm) by water tank experiment. For each experiment, 15 bred shrimps were released into experimental area which installed two netting panels as partitions. The number of shrimps that passed or not passed (retention) the panel during night was recorded, and their carapace length was measured. The retention rate of shrimp in each mesh size decreased as the mesh size expanded: 0.99 (32 mm mesh size) to 0.37 (65 mm mesh size). From the master curve of mesh selectivity, the retention rate of 20 mm carapace length (recruitment size) was estimated as 0.71 at 32 mm mesh size used in the current commercial fishery. The mesh size at which 50% retention length (L50) is 20 mm was estimated to be 35.8 mm.</p>

収録刊行物

関連プロジェクト

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ