关于不可能增加MSY在多站点沙菲尔渔业模型的不可能
Pierre Auger1, Tri Nguyen-Huu1,2, Doanh Nguyen-Ngoc3
1IRD, Sorbonne Université, Unité de Modélisation Mathématique et Informatique des Systèmes Complexes, UMMISCO, F-93143, Bondy, France.
Mathematical biosciences and engineering : MBE
|March 14, 2025
概括
连接渔业的最大可持续产量 (MSY) 低于或等于孤立的渔场. 最佳的渔业努力将舰队集中在丰富的地点,最大限度地减少MSY的总努力.
科学领域:
- 渔业科学 渔业科学
- 生态建模 生态建模
- 资源管理 资源管理
背景情况:
- 渔业通常具有空间结构,资源分布在多个地点.
- 了解渔业努力如何影响多地渔业对于可持续管理至关重要.
研究的目的:
- 分析一个多地点渔业模型的最大可持续产量 (MSY).
- 调查空间分布和渔业努力对MSY的影响.
- 评估利用海洋保护区 (MPA) 尽量减少渔业活动的战略.
主要方法:
- 开发了一个多站点的Schaefer渔业模型,具有后勤增长和差异化的渔业努力.
- 分析了连接和孤立站点MSY之间的关系.
- 研究了MSY平等的理想免费分配 (IFD) 条件.
- 检查了MPA对捕鱼力度优化的影响.
主要成果:
- 连接多站点的MSY小于或等于孤立站点的MSY总和.
- 在理想的免费分配 (IFD) 下,在MSY中实现了平等,其中鱼类在各个地点的访问是统一的.
- 对于任何数量的地点和不同的捕捞力度,一般化MSY计算.
- 海洋保护区可以在战略上使用,以最大限度地降低MSY的捕捞力度.
结论:
- 将渔船集中在最丰富的地区,同时将其他地区指定为海洋保护区,将实现MSY所需的总渔业努力降至最低.
- 理想的免费分配 (IFD) 是最大限度地提高连接多地渔业产量的关键.
- 管理策略必须考虑到空间动态和不同的渔业压力.
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