Evaluation of fishing power for the purpose of standardizing fishing efforts between fisheries

捕捞能力评估，以规范渔业间的捕捞努力

基本信息

批准号：
11660184
负责人：
TOKAI Tadashi
金额：
$ 1.66万
依托单位：
Tokyo University of Fisheries
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11660184/
关键词：
fishing effort fishing power fishing efficiency fishing gear selectivity catchability standardization of catch per unit effort 漁獲強度

项目摘要

For the purpose of reduction in excess fishing capacity, it is indispensable to evaluate fishing power of fishing methods and fisheries. However, fishing power has been evaluated without distinguishing fishing gear selectivity from catching efficiency. This study arranged terminology in terms of fishing power, and presented methods for standardizing catch per unit effort (CPUE) and for estimating fishing gear selectivity and relative fishing intensity including catchability, sampling effort, fishing effort and so on.First, fishing efficiency, catchability and fishing effort were defined clearly. The Tauchi fishing power index that fishing scientists and technologists used to employ for evaluating fishing power can remove effects of temporal and spatial change in resources structure on CPUE, and is hence useful to standardize CPUE, which is similar to standardization by GLM.Second, the SELECT model analysis with fishing effort data can estimate parameters of fishing gear selectivity and catchability at the same time. The split parameter in' the SELECT model was expressed as relative fishing intensity. We successfully modified the SELECT model to analyze the data from paired gear tests with change in sampling effort.Third, the SELECT model was also enlarged for analyzing data in comparative fishing experiments with over-3 fishing gears.Finally, for gillnet as a representative fishing method, effect of mesh size and twine thickness on fishing gear selectivity and catching efficiency was studied. And fishing methods and performance were examined in conger-eel fisheries as an example of multi-fisheries (e.g. longline, trawl, trap-net and tube-pot) and the fisheries management was discussed.

为了减少过度捕捞能力，评估捕鱼方法和渔业的捕鱼能力是必不可少的。但是，已经评估了捕鱼能力，而没有区分渔具选择性与捕获效率。这项研究在捕鱼能力方面安排了术语，并提出了标准化单位捕捞量（CPUE）的方法（CPUE）以及估算渔具的选择性和相对捕鱼强度，包括捕获性，采样工作，钓鱼工作等。首先，钓鱼效率，捕获性和钓鱼工作得到了清晰定义。捕鱼科学家和技术人员用于评估捕捞能力的塔奇捕鱼能力指数可以消除资源结构对CPUE的时间和空间变化的影响，因此对于标准化CPUE非常有用，CPUE与GLM.Second相似，与GLM.Second相似，捕捞工作的选择模型分析可以在同一时间估算捕捞齿轮的选择性和捕获能力的参数。选择模型中的拆分参数表示为相对捕捞强度。我们成功地修改了选择模型，以分析配对齿轮测试的数据，并进行了采样工作的变化。三分之二的模型也被放大，用于分析具有超过3钓鱼齿轮的比较捕捞实验中的数据。吉尔奈特作为代表性捕鱼方法，网格尺寸的效果以及捕捞齿轮的效果和捕捞能力的效果和捕获效果的研究。在Conger-Eel渔业中检查了捕鱼方法和性能，以此作为多名生物（例如Longline，Trawl，Trawl，Trap-Net和Tube-Pot）的一个例子，并讨论了渔业管理。