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首页> 外文期刊>日本水産学会誌 >Searching for optimum management procedures by quantifying management objectives for Japanese domestic fishery stocks without stock biomass estimation
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Searching for optimum management procedures by quantifying management objectives for Japanese domestic fishery stocks without stock biomass estimation

机译:通过衡量日本国内渔业股票的管理目标,寻求优化管理程序,没有股票生物量估计

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摘要

This study explored optimum sets of coefficients used in the management procedure (MP) currently applied to the fishery stocks in Japan when estimates of the total stock biomass are not available. The MP determines annual allowable biological catch (ABC) every year using the trend of relative stock abundance and the estimated current stock status categorized into "high", "middle", and "low". We conducted extensive population dynamics simulations with a variety of uncertainty of population parameters, observation errors, and historical trends of relative stock abundances under the MP. Performance of the MP varied with the combination of adjusting coefficients used in the MP (management rules). We quantified the difference by using scores given to each simulation result under a single management objective arbitrarily given. The total scores calculated among the different management rules illustrated the trade-off between the average catch and risk of over-fishing, and provided a single optimum management rule that maximized the score. We also observed, even under the same management objective, how the optimum management rule depends on simulation parameters, the methods used to estimate current stock status, and years to be considered in calculating ABC.
机译:本研究探讨了当前应用于日本渔业股票的管理程序(MP)中使用的最佳系数集合,当时股票生物质的估算不可用。 MP每年使用相对股票丰富的趋势和分类为“高”,“中间”和“低”的趋势每年确定每年的年度允许的生物捕获(ABC)。我们对MP下的人口参数,观察错误和相对股票丰富的历史趋势进行了广泛的人口动态模拟。 MP的性能随MP中使用的调整系数的组合而变化(管理规则)。我们通过在任意给出的单个管理目标下使用给予每个模拟结果的分数来量化差异。不同管理规则中计算的总分数说明了平均捕获和过度捕捞风险之间的权衡,并提供了一个最佳管理规则,最大化了得分。我们还观察到,即使在相同的管理目标下,最佳管理规则如何取决于仿真参数,用于估计当前库存状态的方法,以及在计算ABC时考虑的年份。

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  • 来源
    《日本水産学会誌》 |2015年第2期|共13页
  • 作者单位

    Fisheries Res Agcy Natl Res Inst Fisheries Sci Yokohama Kanagawa 2368648 Japan;

    Fisheries Res Agcy Natl Res Inst Fisheries Sci Yokohama Kanagawa 2368648 Japan;

    Fisheries Res Agcy Seikai Natl Fisheries Res Inst Nagasaki 8512213 Japan;

    Fisheries Res Agcy Seikai Natl Fisheries Res Inst Nagasaki 8512213 Japan;

    Fisheries Res Agcy Hokkaido Natl Fisheries Res Inst Kushiro Hokkaido 0850802 Japan;

    Fisheries Res Agcy Tohoku Natl Fisheries Res Inst Hachinohe Aomori 0310841 Japan;

    Fisheries Res Agcy Natl Res Inst Far Seas Fisheries Shimizu Shizuoka 4248633 Japan;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 jpn
  • 中图分类 水产、渔业;
  • 关键词

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