漁獲の割合は漁獲競争を遅らせる
Anna M Birkenbach1,2, David J Kaczan1,2, Martin D Smith1,3
1Nicholas School of the Environment, Duke University, Durham, North Carolina 27708, USA.
Nature
|April 6, 2017
まとめ
漁獲シェアは市場ベースの管理手段で 漁業シーズンを効果的に延長し アメリカの漁業における競争競争を減少させます この研究は,漁業管理におけるキャッチシェアの利点を証明しています.
科学分野:
- 海洋生物学
- 漁業科学
- 環境経済学
背景:
- 漁業における"コモンズの悲劇"は 漁業の季節を縮小し 生態学的損害,経済的損失,安全上のリスクを引き起こします
- 漁獲分は,個人に漁獲総量の一部の権利を与えることで,これを緩和し,理論的には"漁獲競争"を終わらせることを提案しています.
研究 の 目的:
- 自然実験を体系的に分析し,米国の39の漁業における"漁獲競争"を減少させるという仮説を検証する.
- 漁業シーズンのダイナミクスを変化させるのに有効なキャッチシェアに関する経験的証拠を提供すること.
主な方法:
- 自然実験のデザインを用いて,個別にマッチしたコントロール漁業とキャッチシェアで処理された漁業を比較した.
- 政策変更前の分析と後の分析
- 集団モデルと個々の治療対照群のメタ解析を用いた平均的な政策治療効果の推定.
主要な成果:
- 捕獲量が分析された米国の漁業全体で漁業期間を大幅に延長するという強力な証拠が見つかりました.
- "漁獲競争"を効果的に終わらせることができるという理論と一致しています.
結論:
- 釣りシーズンを延長し,漁業管理における"釣り競争"の悪影響を軽減するための効果的な手段です.
- この発見は,同様の課題に直面している他の漁業における市場ベースの管理戦略の拡大を支持しています.
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