诱鱼灯光场计算及其对光诱鱿鱼浮拖网作业的影响  

Light-field calculation of light-attraction lamp and discussion on its suitabilities to fishing gear and methods in light-pelagic trawl for squid

作　　者：郑国富[1] 

机构地区：[1]福建省水产研究所,厦门361012

出　　处：《台湾海峡》1999年第2期215-220,共6页Journal of Oceanography In Taiwan Strait

摘　　要：本文运用诱鱼灯光照度的有关公式，计算了光诱鱿鱼浮拖网作业中的光场分布及变化，结合鱿鱼趋光行为习性，分析现有渔具渔法的适应性。结果表明：使用１６盏锭铟灯水上灯，诱鱼最大水平距离比仅使用水下灯增加约６８０倍，但水上灯从 １６盏增加到 ４０盏时，从经济角度分析不很理想；在集鱼过程中，关闭最后一组水上灯后，应有白炽灯经过降压（至５０Ｖ）后再过渡到水下灯集鱼；导鱼灯在向网口移动的过程中应继续降低电压（至２０Ｖ）；如果导鱼灯电压只降至７０Ｖ，则应改进现有网具结构，扩大网口周长，以增加鱼群入网机会。By calculating the distribution and variation of light-field with light-attraction lamps above and underwater surface in light-pelagic trawl for squid, the suitabilities of existing fishing gear and methods are analyzed based on the phototactic behaviour of squid. The main conclusions are as follow. 1) The light-attraction distance for squid with 16 lamps above water surface increases about 680 times as against with 7 lamps underwater surface. But when lamp numbers above water surface is increased from 16 to 40, the increase ratio of light-attraction distance(only 14. 7%) is rather low. The investment to increase lamps above water surface may not be paid back. 2) It is suggested that 2 extra incandescent lamps above water surface are used to continue gathering the squid after the last group of lamps are switched off. When their volt age are gradually reduced to 50V, they are switched off and use the lamps underwater sur face instread to gather the school. 3)When the voltage of 'lamp for leading squid' is 70V, the range of squid gathering is less than that of leadline rope spread but larger than that of mouth spread of the net, so it is suggested to be continuelly reduced the voltage (the mini mum voltage is 20 V) while the 'lamp for leading squid' is moving to mouth of the net. Fur thermore, the fishing gear should be further improved.

关 键 词：鱿鱼 诱鱼灯 光场计算 光诱鱿鱼 浮拖网作业 

分 类 号：S973.4[农业科学—捕捞与储运] S972.65[农业科学—水产科学]