Application of standard method for extensive estimation of ghost-fishing mortality to international fishing ground

国际渔场鬼鱼死亡率粗略估计标准方法的应用

• 批准号: 21580231
• 负责人: MATSUOKA Tatsuro
• 金额: $ 3.08万
• 依托单位: Kagoshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21580231/
• 关键词: ゴーストフィッシング; 逸失漁具; 漁業; 資源管理

On-board survey of the fishing gear loss rate in the crab trap fishing ground in the Sea of Japan, interview surveys of fishing gear loss rates in 3 countries and under-water observation of the consequent changesin entry and death of crabs in deliberately-set derelict traps were conducted. The ghost-fishing mortality in a trap was represented with an experimental and theoretical equation as; f_g(t) = a(1-c^t)・(1-b)^t. Annual gear loss rates were 0.2 in Japanese crab-trap fisheryat the Sea of Japan, 0 in coastal fisheries in Thailand and Tanzania, while 0.08 to 0.23 in coastal fisheries in Southern Kyushu. Escape-ring as a countermeasure against ghost fishing was proved to have an additional function to increase large individuals in catch.

对日本海捕蟹器渔场的渔具损失率进行了船上调查，对3个国家的渔具损失率进行了访谈调查，并对故意设置的捕蟹器中螃蟹进入和死亡的变化进行了水下观察。本文用实验和理论方程描述了诱捕器中幽灵鱼的死亡率：f_g（t）= a（1-c^t）·（1-B）^t。在日本海的日本捕蟹笼渔业中，年渔具损失率为0.2，在泰国和坦桑尼亚的沿海渔业中为0，而在南九州的沿海渔业中为0.08至0.23。逃逸环作为一种对抗幽灵捕鱼的措施，被证明具有增加大个体渔获量的附加功能。