Development of the Size Selectivity Theory of Angling Gear

钓鱼用具尺寸选择性理论的发展

基本信息

批准号：
05806025
负责人：
SHIMIZU Susumu
金额：
$ 1.22万
依托单位：
Hokkaido University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05806025/
关键词：
Angling Gear Size Selectivity Modeling Hooking Process Hook Size Hook Shape Bait Size 釣針餌魚群行動サクラマス魚の行動

项目摘要

In this study, the influence of fish size and the influence of the characteristics of the main components of angling gear were investigated. A relation between those factors and size selectivity was found, so the size selectivity theory of angling gear was developed.1) The entering process of a hook into the model of a mouth cavity occurred by fluid resistance. The maximum entering distance of a big hook or a big bait in the model was longer than a small one. But the ratio of entrance of a big hook was lower than for a small one. Considering the ratio of entrance, the total average of the maximum entering distance of the big hook was shorter than for the small one.2) For the long type hook, the maximum entering distance changed when the shank touched the upper part of the entrance of the model. For the round type hook, it did not appear that the maximum entering distance changed when the shank touched the entrance. And this hook had an advantage for hooking because the hook point easily touched the upper inside of the model.3) It was shown that a suitable bait size existed for a given fish size, according to the hard entering coefficient estimated by angling experiments. Bait size was related to the hard entering coefficient. Because there was not a simple relation, such as liner, it was difficoult to construct a mathematical model.4) As the limit of entering distance was introduced in the stochastic model of the hooking mechanism, this model could be fit on many more cases of angling phenomenon. The relation between the limit of the entering distance and size or shape of a mouth cavity, a hook, and a bait will have to be investigated in the future.

在这项研究中，研究了鱼大小的影响以及钓鱼齿轮主要组成部分的特征的影响。发现了这些因素与尺寸选择性之间的关系，因此开发了钓鱼齿轮的尺寸选择性理论。1）钩子进入嘴腔模型的过程是流体抗性发生的。大钩或大诱饵的最大输入距离比小钩子长。但是，大钩的入口比小于一个小钩子。考虑到入口的比率，大钩的最大输入距离的总平均值比长钩子的小钩子短。对于圆形钩子，当小腿触摸入口时，最大输入距离似乎没有变化。而且该钩子具有钩的优势，因为钩子很容易触摸模型的鞋面。3）表明，根据钓鱼实验估计的硬进入系数，存在适当的诱饵尺寸。诱饵大小与硬进入系数有关。由于没有简单的关系，例如衬里，因此很难构建数学模型。4）由于钩钩机制的随机模型中引入了进入距离的极限，因此该模型可能适合更多的垂钓现象案例。将来必须研究进入距离，钩子和诱饵的距离，大小或形状的极限之间的关系。