光诱鱿钓渔船集鱼灯的水中照度分布及合理配置研究

Underwater irradiance and optimal allocation of fish aggregation lamps in a squid jigging ship

集鱼灯的合理配置是光诱渔业研究的重要内容,本研究中根据＂岱远渔807＂光诱渔船的集鱼灯布置参数,对该船的水中照度分布进行了理论计算。结果表明：渔船集鱼灯总功率为130 k W时,10 lx的等照度曲线水平方向最远为55 m,水深方向不超过25 m,0.1 lx的等照度曲线水平方向最远为190 m,最深可至40 m水深;当总功率减为65 k W时,等照度曲线所在水层仅减少5 m左右;以0.01 lx为诱集鱿鱼的最低照度,增加一倍的集鱼灯功率,照度在水平方向上约能增加18.6%的有效诱集距离。研究表明,从集鱼灯的配置情况来看,＂岱远渔807＂渔船目前的配置还是比较合适的,但如能将灯高增大0.5 m,照度则可增加4.1%的有效水体体积,茎柔鱼较为活跃的照度范围为0.2~1.0 lx。

Since the optimal allocation of fish aggregation lamps is a crucial factor in lighting fisheries,the illumination distribution underwater was estimated in terms of the arrangement parameters of fish aggregation lamps on a small squid jigging ship. The results showed that the iso- illuminance curve contours of 10 lx were in the depth of25 m and in horizontal direction of 55 m at most under the ship with the total output of 130 k W. The curve contours of 0. 1 lx were in 40 m vertically and 190 m horizontally at most under the ship with the total output of 130 k W.However,the curve contours was reduced by 5 m roughly in the depth at the total metal halide lamp power of 65 k W. The horizontal effective attracting distance was increased by 18. 6% at the double output from the minimal squid attracting illumination of 0. 01 lx. The findings indicate that the ＂Daiyuanyu No. 807 ＂as a conventional squid jigging ship has appropriate in configuration of fishing lamp,but if the lamps are elevated by 0. 5 m,the effective water volume will be increased by 4. 1% within the illumination between 0. 2 to 1. 0 lx at which squid Dosidicus gigas show more activity.