萤光拖网推广试验的研究报告

本文报道了1996—1997年萤光拖网推广试验的结果,比较和分析了不同光周期下,萤光网的作业效率变化及其对不同渔获类型的捕获效应关系。试验表明,太阳光、月光和天气变化都对萤光网的作用效率产生影响,这种影响因渔获类型的不同表现各个相同,并伴随昼夜交替而发生变化。萤光网对各类型渔获的最有利捕捞时间,大多在黄昏至夜间的低照度下;萤光网对不同捕捞对象有不同的效应,具有种间差异大,并与其生态类群存在密切联系的特点。本试验研究结果,符合于海洋动物视觉功能的特征,也符合于海洋动物生态类群的一般规律。

A Research Report on Extensin Experiments of Fluorescene twine

The results of extension experiments on trawl made of Fluorescene-Twine during 1996 to 1997 are reported in this article. Its fishing effects on different kind of Capture,as well as the variation of its efficieng are compared and analysesed according to diffirent periodicity of the light. The experiment show:the fishing efficiency is influenced by the variation of sunlight,moon light and weather. The influence is different with different kind of capture and varies between the daytime and nightime. The best efficiency on every kind of capture occurs in low illumination during the dusk and night. Its fishing effects differ greatly between every different kind of capture and connect closely to their Ecological groups. The experiment results conform to the specification of marine animal vision and the general law of Ecological groups of marine animal.