不同倾角的秋刀鱼集鱼灯箱照度实验比较研究

秋刀鱼是西北太平洋北部温带水域的主要捕捞对象之一,集鱼灯灯光配置是秋刀鱼高效捕捞技术的重要内容。本文通过模拟灯箱光学特性实验,利用Matlab7.0软件建立秋刀鱼集鱼灯箱照度分布模型,对不同倾角的秋刀鱼集鱼灯箱的照度分布进行了研究。结果表明:当秋刀鱼集鱼灯倾角为30°、45°及60°时,集鱼灯箱的地面照度大小随地面距离的增加而减少,并且不同倾角时的集鱼灯箱地面照度分布之间存在显著差异,照度分布衰减程度也随灯箱倾角的增加而递减;不同倾角时的照度光场波动也存在差异,30°倾角时的集鱼灯灯光照度光场波动变化大于45°和60°倾角时的照度光场波动变化,而照度等位线密集度也随着倾角角度的增加而降低;秋刀鱼集鱼灯灯箱倾角为60°时,其照度分布和光场波动较稳定,诱集区域较大。

Comparative experiment of aggregation light for Pacific saury fishery at different inclinations

Pacific saury Cololabis saira is one of main fishing targets in the temperate waters of the northern Northwest Pacific Ocean, and fishing lamp lighting configuration is an important content of efficient fishing technology for saury fishery. Through the imitating experiment of the optical properties of lamp boxes, the paper structure the illuminate distribution models of saury aggregation lights using Matlab7.0 software and analyze the light illumination effects of fish aggregation lamp boxes under different inclination scenarios. The results show that, when the angle of fish aggregation lamp boxes was 30°, 45°, and 60°, the ground illumination of saury aggregation lamp boxes decreases as the increasing of ground distance, and there were significant differences between ground illumination distribution in different inclinations, the attenuation degree of illumination distribution also decreased with the increasing of light box angle. Significant difference on fluctuation of light field can be found between the illuminations under different inclinations. The fluctuation of light field for the illumination under 30° inclination was remarkable than those under 45° and 60° inclinations. The density of illumination isoline decreases as the increasing of inclination angles. When the angle of fish aggregation lamp box was 60°, the distribution of illumination and the fluctuation of light fields were relatively stable, and the larger area conducive to aggregating saury can be found.