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首页> 外文学位 >A sustainable fishery management study: The yellowfin tuna fishery in the western and central Pacific Ocean.
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A sustainable fishery management study: The yellowfin tuna fishery in the western and central Pacific Ocean.

机译：可持续渔业管理研究：太平洋中西部的黄鳍金枪鱼渔业。

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摘要

The yellowfin tuna population has been experiencing a significant decrease since far-sea fishery entered the West Central Pacific Ocean (WCPO) region in the 1950s. The development of the fish stock and the influence of fishing must be studied carefully. I start this study with the yellowfin tuna stock assessment. I combine the logistic growth function from the Schaefer model and the framework of an age-structure model to analyze the stock assessment. The total stock is separated into two subgroups by age (immature and mature). In the second part of this study, a two-cohort dynamic model is constructed to investigate the relationship between these two age groups. The Vector Auto-Regression (VAR) method is applied to this model using WCPO data from 1950 to 2004. The result suggests that the immature fish stock is extremely important to sustain a steady-state total fish population in the long term. The model is then expanded to include the influence of fishing in the third part of the study. A 3*3 differential equation system is built through application of the optimal control theory to examine the relationship between the total catch and the fish stock when the fish are exploited by a present-value-maximizing fishery. The numerical analysis shows that the total catch and the catch ratio between immature and mature fish are both important variables for a sustainable steady-state between the fish stock and the fishery.
机译：自1950年代远海渔业进入中西部太平洋（WCPO）地区以来，黄鳍金枪鱼种群一直在大幅减少。必须仔细研究鱼类种群的发展和捕鱼的影响。我从黄鳍金枪鱼种群评估开始这项研究。我结合了Schaefer模型的逻辑增长函数和年龄结构模型的框架来分析库存评估。总存货按年龄（未成熟和成熟）分为两个子组。在本研究的第二部分中，构建了两个队列的动态模型来研究这两个年龄组之间的关系。使用1950年至2004年的WCPO数据，将矢量自回归（VAR）方法应用于该模型。结果表明，不成熟的鱼类种群对于长期维持稳态总鱼类种群极为重要。然后对该模型进行扩展，以将捕鱼的影响纳入研究的第三部分。通过应用最优控制理论建立了一个3 * 3微分方程系统，以研究当值最大化的渔业开发鱼类时总捕捞量与鱼类种群之间的关系。数值分析表明，未成熟鱼与成熟鱼之间的总捕捞量和捕捞率都是维持鱼类种群和渔业可持续稳定状态的重要变量。

著录项

  • 作者

    Chang, Kuo-Liang.;

  • 作者单位

    The University of Utah.;

  • 授予单位 The University of Utah.;
  • 学科 Economics Agricultural.; Agriculture Fisheries and Aquaculture.
  • 学位 Ph.D.
  • 年度 2007
  • 页码 180 p.
  • 总页数 180
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 农业经济;水产、渔业;
  • 关键词

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