光诱渔船集鱼灯的光照度分布及其适渔性能分析

Analysis on Intensity of Illumination Distribution of Gathering-fish Lamp and Its Suitable Fishing Performance in the Light-fishing Boat

本文通过对光诱渔船的集鱼灯水下照度实测和理论推导,对不同功率的灯光在水下的水平传播和垂直传播的光照度进行比较分析,探讨了不同功率灯光水下光照度对鲐鯵等中上层鱼类和头足类的适渔性。结果表明,灯光在水下的水平和垂直传播过程中,受媒质的影响,光照度不断减弱,但较大功率的灯光衰减较缓,在水下传播范围大,水层深。由于鲐鯵鱼类和头足类在微光下均有趋光习性,因此诱集效果较好。但是,随着水平面距离的增大,较大功率灯光的光照优势逐步减少。

The spot experiments and theory calculation of underwater intensity of illumination distribution of gathering - fish lamp on light -fishing vessel were carried out. The level and vertical diffusion of different power light were analyzed and compared. The suitable fishing performance of intensity of illumination of different power on pelagic fish, for example, Decapterus maruadsi, Pneumatophorus japonicus and Cephalopod, were discussed. The results show that the intensity of illumination was constantly lowered since the light was influenced by medium when it was flatly and vertically diffused. However, the light with larger power was more tardily lessened and it was diffused underwater more extension and more deepness. Since Decapterus maruadsi, Pneumatophorus japonicus and Cephalopod have phototaxy under shimmer, the effect of light with more power on gathering fish is better. However, with the distance increasing, the advantage of light with more power is reduced gradually.