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三层刺网是历来在沿岸使用的底刺网的一种。关于这种网具,除进行过划艇刺网的选择应用、鲑鳟三层刺网的适用试验及三层刺网的渔获试验外,其渔获的选择应用尚未研究过。三层刺网通常被认为是一种与个体大小无关,渔获选择作用少的刺网,其渔获性能比普通的单层底刺网显著。本研究为调查三层刺网的渔获选择应用,首先就其内层网衣网目的大小对渔获的个体大小的影响分析而得出以下实际结果。
The three-layer gillnet is a type of gillnet that has traditionally been used along the coast. About this kind of nets, in addition to the selection and application of rowing gill nets, three-layer gill nematocyst for salmon test and three-layer nematocyst catch experiment, the selection of its catch has not been studied. The three-layer gillnet is generally considered to be a gillnet that has little to do with the size of the individual and less selective catches, and its catching performance is more pronounced than that of an ordinary monolayer gillnet. In order to investigate the selection and application of three layer gill nets, we first analyzed the effect of the size of the inner layer mesh on the size of the individual catches and obtained the following practical results.