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大原川のサケ

 別ブログにも書いたのですが、本日まで三陸に出張でした。サケ関連ではなかったのですが、時間に余裕があったので、ちょっとサケも。
ooharaurai.jpg
 見て来たのは雄勝町を流れる大原川の様子です。記録上はそれほどの遡上はないようなのですが、時期が良かったのか、行って見ると、ウライの周囲には大量の鮭が泳ぎ、さらにウライの上流側にもくぐり抜けたのか、上流川でもたくさんのサケがいました。
 さらに良く見ていると、産卵行動に入っている雌もちらほら。明らかに尾を使って河床を掘っています。オス同士も体をつつき合う仕草をみせることもありますし、メスの奪い合いをしているのかもしれません。これを見ていると、ウライの下流川でも自然産卵が結構あるようです。
 川が小さく、透明度も高いので鮭の生態を見るには最適の川かも知れません。

oohara.jpg

 写真は鮭の姿ですが、こんな感じで悠然と泳いでいます。産卵行動に入った雌も撮影にチャレンジしたのですが、写真はイマイチでした。こっちは次回に乞うご期待?ということで。

2004 11 26 09:57 PM | 固定リンク

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