Flatfish tagging survey for monitoring the spawning migration

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Uploaded by on Jan 21, 2009

産卵回遊中のヒラメの天然水域における行動調査:深度・温度記録計を親魚に取り付けて海に放します。野外での行動記録を得ます。タグ取り付け時に、個体の生殖腺の発達ステ­ージを把握しておくために、卵巣から卵細胞を採取して、後で卵細胞の発達ステージと卵径などを計測します。採血もしています。

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