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.

福建省海洋捕捞业发展很快,但近年来发生很大变化,2000年全省渔船52718艘、64万总吨、172.5万KW,其中捕捞渔船37733艘、55.85万总吨、152.27万KW.比1985年捕捞渔船增加38.4%、吨位增90.9%、功率增174.8%,海洋捕捞专业劳力22.41万人.多年来由于重生产轻管理,渔船发展无序,许多安全隐患在渔村经济体制改变后明显地暴露出来,沉船伤亡事故频发,急需引起各级政府严重关注.我省海捕渔船安全隐患主要有自然条件、渔船设备、人员素质、管理等四个方面原因.