河川調査

四十八瀬川自然村河川部会の四十八瀬川の四季定期３定点（上・中・下流）春の河川調査を６日に実施。水流は 減水状態。

昨年、増水の頻度が多かった割には 極端な増水がなく、１２月調査では、カジカの当歳魚を 多く観察、今回の調査でも その幼魚が、上・中・下流とも 例年になく、多く、採捕されました。

更に 抱卵したカジカも採捕され、間もなく始まる孵化後の大増水がないことを祈るばかりです。

また、水生昆虫などの底生生物の採捕も多く確認されました。

 

 

 

 

 

 

 

 

 

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すべてのリアクション:

6比内 護、川口 和夫、他4人