高压钠灯在阿拉伯海鸢乌贼钓捕中的应用效果

The fishing efficiency of high pressure sodium lamp to the Symlectoteuthis oualaniensis in Arab Sea

20 0 3年 10月 ,在阿拉伯海鸢乌贼渔场中对鱿钓船的舷侧水中光照度进行了实测。本文结合试验船的尺寸数据和当时的渔获生产统计数据 ,对使用高压钠灯 (也称变色灯 )时的光照度分布及其使用前后的钓捕效果进行了比较分析。在 12 0盏× 2kW金属卤化物灯作用下 ,在距船右舷 3 0m的垂直断面 ,0 0 1lx的等光照度曲线在 5 5m水层附近 ;但在 2 0盏× 5 0 0W高压钠灯作用下 ,0 0 1lx的等光照度曲线在 2 0m水层附近。采用高压钠灯可以使鱿鱼聚集密度增大 ,钓捕深度变浅 ,从而提高渔获效率 ,其每小时平均产量比采用高压钠灯前高 1～ 6 5倍。

Experiments of high pressure sodium lamp on the spot were carried out in the fisheries studies of the Symlectoteuthis oualaniensis fishing ground in the Arab Sea in Octomber 2003. According to the dimension of the ship and the products, the irradiating distribution of the high pressure sodium lamp and the fishing efficiency were studied. When the output of metal halide lamps is 240 kW, the iso-illuminance curve of 0.01 lx is in the depth of 55 m. When the output of high pressure sodium lamp is 10 kW, the iso-illuminance curve of 0.01 lx is in the depth of 20 m. When using high pressure sodium lamp, the density of squid will increase, the fishing layer will be shallower, and the fishing efficiency will be better, and the average product per hour will be 1 to 6.5 times than before.