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サツキマスの飼育

 以前触れた、サツキマスに関する記事です。

世界最南端のトッテモ珍しいサケが日本に住んでいる

 可動堰に伴い長良川のサツキマスが絶滅するのでは、という記事から出発され、その保護策の一つとして飼育を試みたレポートです。遡上中のサケが餌を実際に食べるのか、という問題があるため、試行錯誤をされて、数十匹の食餌と飼育に成功されたそうです。後段から、実際に水槽の中にいるマスの写真を見て、おぉ、となります。
 確かに、私もサケについて調べはじめたときは、川に上るとサケは餌を食べないとものの本には書いてありました。また、ルアー釣りでサクラマスが釣れるのだから、餌を食べるとも書いてありました。これまで見落とされてきた理由についても考察されていますが、確かに餌に比して魚の量が多いし、特にサケの場合は遡上から産卵までの期間短いということもあるのでしょうかね。
 ひとまず紹介まで。

2004 07 06 01:35 PM | 固定リンク

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