29年間の禁漁期終了前後のサクラマスとブラウントラウトの生息個体数変化
書誌事項
- タイトル別名
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- Changes in Number of Masu Salmon and Brown Trout before and after the Termination of a 29-year Closed Fishing Period
- 29ネンカン ノ キンリョウキ シュウリョウ ゼンゴ ノ サクラマス ト ブラウントラウト ノ セイソク コタイスウ ヘンカ
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We evaluated the effects of recreational fishing on masu salmon and brown trout in Chitose River, Hokkaido. The fish in the river, which had been closed for 29 years, were counted two years before the opening and soon after. We found that salmon ≥ 1+ in age decreased after the river was opened, but there was no significant difference in the number of trout the same age. In the study area, numerous anglers were observed. The results suggest that opening the river after it had been closed for a long time led to a disproportionate decrease in salmon.
収録刊行物
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- 水産増殖
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水産増殖 62 (2), 203-206, 2014
日本水産増殖学会
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詳細情報 詳細情報について
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- CRID
- 1390282679697080064
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- NII論文ID
- 130005078194
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- NII書誌ID
- AN00124667
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- ISSN
- 21850194
- 03714217
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- NDL書誌ID
- 025614122
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- IRDB
- NDL
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可