摘要
智利外海茎柔鱼是我国鱿钓船的主要捕捞对象之一，集鱼灯灯光配置是高效捕捞技术的重要内容。本文根据智利外海茎柔鱼作业渔场的实测灯光强度，推算其灯光衰减系数。同时，在理论上建立灯光水中照度计算模式，并以“新世纪52号”鱿钓渔船为例进行灯光配置的分析与探讨。研究结果认为，智利外海金属卤化物灯的水中衰减系数为0．2。分析表明，随着鱿钓船集鱼灯灯高的增加，照度0．1～10lx之间的诱集水体体积（下称为“有效体积”）不断增加，但增加幅度呈递减趋势，目前该船的灯高（6．5m）较为合适；集鱼灯间距在0．55m时所对应的有效体积最大，建议该船的灯距可从0．5m增大到0．55m；随着集鱼灯总功率的增加，有效体积不断增加，并在300kW附近达到最大值，而后随着总功率的增加而减少，建议该船集鱼灯总功率可从360kW降到300kW。研究表明，不同作业海域和不同钓捕对象对鱿钓船集鱼灯有着不同的要求和配置，集鱼灯总功率并不是越大越好。
Dosidicus gig, as is one of important fishing targets in the Chinese squid jigging fishery which is distributed in the high seas off Chile. Effective utilization of fish-attracting light power is an important aspect of fishing techniques. In the paper, light attenuation coefficient is estimated based on the in suit measurement of light intensity in the squid fishing ground off the coast of Chile. Meanwhile, the calculation model of underwater light illumination is established theoretically, and the ＂Xinshji No. 52＂ squid fishing vessels is considered as an example to analyses effective utilization of fish-attracting light power. The results show that the light attenuation coefficient of metal halide lights equals to 0.2 in the water. With the lights moving up, the suitable illumination volume between 0.1 and 10 lx （called the ＂effective volume＂） increases continuously, but the increasing ratio displays a downward trend, it is appropriate for the vessel to set the height of lights at 6.5 m. Effective volume can be maximized by setting lights distance at 0.55 m, therefore, it is proposed that lights distance increase from 0.5 m to 0.55 m in the vessel. Effective volume increases with total power of fish attracting lights, and reaches the maximum at total power of 300 kW. It is recommended that the total power of the vessel reduce from 360 kW to 300 kW. The setting and requirements of fish-attracting light can be modified according to fishing area and fishing target. It is not advisable to put more and more power on fish-attracting light.
出处
《水产学报》
CAS
CSCD
北大核心
2008年第2期279-286,共8页
Journal of Fisheries of China
基金
农业部公海渔业探捕项目(06-65)
上海市重点学科建设项目(T1101)
关键词
茎柔鱼
集鱼灯
灯光配置
鱿钓渔船
智利外海
Dosidicus gigas
fish-attracting light
effective utilization
squid jigging vessel
the high seas offChile
