王迎宾,刘群

• 1:中国海洋大学水产学院
• 2:中国海洋大学水产学院 山东青岛266003
• 3:山东青岛266003

摘要(Abstract)：

根据已开发鱼类种群的自然死亡率(M)在鱼类资源评估中的重要作用,讨论了1种应用实际种群分析(VPA)(亦即世代分析方法)估算鱼类自然死亡率的方法。文中假设了捕捞努力量(E)已知和未知2种情况,并同时求出了其他种群参数,如可捕系数,补充量等。在蒙特卡罗模拟分析中,假设了4种模拟渔业(管理良好的渔业,掠夺式渔业,恢复性渔业和稳定性渔业)对该方法进行了验证。并将von-Bertalanffy生长方程(VBGF)引入VPA模型来估算鱼类的自然死亡率。当C V等于20%时,在4种模拟渔业中鱼类各龄自然死亡率(Ma)的EP均小于10%。在已知单位捕捞努力量渔获量数据时,计算北大西洋长鳍金枪鱼(Thunnus alalunga)的M等于0.119,这个结果比先前假定的值(0.3)小,但考虑到该鱼种所承受的高的捕捞压力作者认为该估计值是合理的。

关键词(KeyWords)： 自然死亡率;实际种群分析;模拟分析;长鳍金枪鱼

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(30271025)资助

作者(Author): 王迎宾,刘群

DOI: 10.16441/j.cnki.hdxb.2005.05.006

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