南海头足类资源开发利用研究

南海头足类资源丰富 ,文献报道的种类有 89种。在水深 40m以浅海域分布数量较多的种类为杜氏枪乌贼Loligoduvaucelii(Orbigny) ,在水深 40m以深海域分布数量较多的种类为中国枪乌贼L .chinensis(Gray)。渔汛期为夏、秋季。统计历年生产资料表明 ,头足类的年产量和占渔获物比例有逐年上升的趋势。随着底拖网捕捞技术的提高 ,头足类的密度指数有所增加 ,但并不说明头足类的资源就很丰富。若不注意合理开发利用 ,将导致头足类资源的衰退。限制和废除损害头足类资源的渔具十分重要。

A STUDY ON EXPLOITATION OF CEPHALOPODA STOCK IN SOUTH CHINA SEA

The South China Sea is rich in cephalopod resources. So far, a total number of 89 species have been reported. Loligo duvaucelii Orbigny and Loligo chinensis Gray are respectively the dominant species within and deeper than water depth of 40m on the continental shelf. The fishing seasons are summer and autumn. It is revealed by the commercial catch statistics that the annual catch of cephalopod and its percentage in total marine catch have been increasing from year to year. The increment of cephalopod catch should be attributed to the improvement of demersal trawl fishing techniques, and would not necessarily mean the increment of the cephalopod abundance. On the contrary, the resources will be depleted if the fishing intensity is exploited irrationally. It is very important to restrict and abandon the gears that damage the stocks of cephalopod.