技术变化如何提高印度洋鱼渔业鱼类聚合装置生产率
Alex N Tidd1, Laurent Floc'h2, Taha Imzilen2
1MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Sète, France. alex.tidd@ird.fr.
Scientific reports
|October 19, 2023
概括
过度的捕捞能力威胁着渔业. 漂流鱼聚合装置 (DFAD) 提高了金枪鱼捕捞的生产率,需要更好地基于投入的管理,以防止黄鱼和鱼的过度捕捞.
科学领域:
- 渔业科学 渔业科学
- 海洋生态海洋生态学
- 资源管理 资源管理
背景情况:
- 过度的捕捞能力对全球渔业的长期可持续性构成重大威胁.
- 使用输入-输出分析估计经济生产效率对于识别产能过剩至关重要.
- 在公海金枪鱼渔业中漂流鱼聚合装置 (DFAD) 的增加加剧了关于潜在过度捕捞的争论.
研究的目的:
- 分析法国鱼船队在印度洋西部捕捞热带金枪鱼的生产效率的相对变化.
- 为了比较两个不同的捕捞策略之间的效率动态:浮物捕捞 (FOB) 和自由游泳学校捕捞 (FSC).
- 为改善基于投入的管理策略提供见解,以减轻过度捕捞风险.
主要方法:
- 使用数据包装分析 (DEA) 来评估生产效率.
- 分析使用了1992-2019年的金枪鱼捕获量和努力数据.
- 对两个捕捞策略的效率变化进行了评估:基于浮物体 (FOB) 和自由游泳学校 (FSC).
主要成果:
- 漂浮物体捕捞 (FOB) 显示出3.6%-1年 (从2007年至2019年为8.0%-1年) 的显著生产率增长,主要是由于技术变化.
- 自由游泳学校 (FSC) 渔业的生产率增长率较低,为2.1%-1年,这是由于创新和提高效率的结合.
- 虽然FOB渔业的投入使用效率保持相对稳定,但其整体生产率激增凸显了技术进步的影响.
结论:
- 该研究强调了DFADs对渔业生产率的巨大影响,特别是对于FOB战略.
- 在FOB和FSC策略之间存在不同的效率动态,因此需要量身定制的管理方法.
- 建议立即实施改进的以投入为基础的管理,以应对该地区对黄鱼和鱼的过度捕捞风险.
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