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荒川へサケの稚魚放流

 そろそろ、サケの稚魚放流に関わるニュースが出始めてきました。この時期の風物詩ですね(私だけかもしれませんが…)。
 多くの川は毎年のように記事を見ている河川なのですが、そんな中で、ちょっと気になる川での稚魚放流が。

リンク: 荒川へサケの稚魚放流.

 荒川って?と思い、記事をみると東京を流れる荒川でした。


5日、荒川の千住新橋下流のわんど広場でサケの稚魚が放流された。親子で育つわらべの会(桑原照雄代表)を中心に、五反野小学校おやじの会(近藤尚登会長)が協力した。
稚魚は3~7センチくらい わらべの会が12月3日に配布した卵は過去最高の1万2千個。区内23小学校と2幼稚園、葛飾区西小菅小に配布され、子どもたちが各家庭でふ化し稚魚になるまでを観察した。
(中略)
 参加者は放流後、サケゴミをこんなに集めたよが棲めるようなきれいな荒川に、それには河川敷もきれいにとゴミ拾いをした(写真右下)。その後、柔らかな早春の光の中で、わらべの会が用意したトン汁を食べて散会となった。荒川への放流は7回目。

とのこと。
 記事中のインタビュー部分にもあるように、基本的には子供向けの”生命の神秘を知ってもらうこと”と”環境教育”のためにサケの稚魚育成、放流が行われているようですね。
 東京だと、気温が少し高めですから、育てるのが難しいのかもしれませんが、教科書の写真などでよく見るサケの稚魚(あの、さいのうがあるやつですね、って今の教科書にもっているのかしら)を直接見て、育てられるのですから、よい経験とはいえるのでしょうね。
 ところで、この稚魚、どこから来たのですかね。この当たりも気になるのですが、記者さんはさほど興味はなさそう。近辺ですと、茨城那珂川あたりですかね。
 というのも、荒川は、実は日本で最初に稚魚を放流した河川として知られていて、明治時代の初期に試験的に放流が行われていました。たぶん、当時はもっときれいだった荒川でも、確か数匹の回帰がみられただけだったということで(埼玉県庁にそういう行政記録が残っています)、はたして、この事業はどの程度意味があるのか、実は気になったりします。回帰がほとんど見込めない川で、稚魚を放流する事業をするというのははたしてどういう意味があるのだろうか、最後は親がちゃんと戻ってきた、というところまでいかないと、教育的な側面でも大きな効果は望めないような気がするのですが…、それは斜にかまえすぎですかね^^;

2006 02 16 06:20 AM | 固定リンク

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» 鮭の稚魚 その5 無事放流したでぇ〜 from PERFECT EMPTY BLOG
=== 「パパこれ頼むね〜。」で始まったこのシリーズ、ちと受けは悪かったが、今回が最終回や。今日が放流日やからの。 === [[attached(1,center)]] === 今朝水槽から取り出した鮭を見て次男のやつ「おぉ〜、けっこう大きくなってるじゃん。」やて。ったく世話もせんといい気なもんやで。 === === 鮭を放流する場所行って愕然としてもうた。計測やっとらん・・・。5年前はやっとったんにいつから廃止になったんや?計測係のおっさんの度肝抜く言う夢は絶たれてもうた。 === ..... 続きを読む

受信: Mar 6, 2006 10:39:39 AM

コメント

こんにちは~。私も先日卵から育てた鮭を放流してきました。関係記事をトラックバックさせていただきます。

投稿者: ECCENTRIC (Mar 6, 2006 10:37:41 AM)

お返事が大変遅くなってしまいました。申し訳ありません。
無事鮭が成長したようですね。8cmですか。かなり大きいですね。写真ではよくわかりませんがパーマーク(胴体にでる楕円形の斑紋)も出ているようですし、立派な子供のサケ?ですね。

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