东海头足类的数量分布与可持续利用

The Quantity Distribution and Sustainable Use of Cephalopod in the East China Sea

根据1994年6月~1996年5月和2004~2006年对东海大陆架25°30′N^33°30′N,128°00′E以西海域调查资料,对头足类的数量分布进行研究。结果表明:头足类数量分布高峰期出现在夏季,渔获率为26.9 kg.h-1,其次是秋季,为16.5 kg.h-1,春季最低,只有8.7 kg.h-1。其渔获量分布以6~12月密度较高,密集中心出现在舟山渔场东南部和鱼山渔场、温台渔场外侧水深80~100 m海域。东海实施伏季底拖网休渔制度后,头足类产卵场得到保护,但头足类夏季高峰失去利用,渔获率下降了14.7%。建议调整作业结构,调整捕捞季节,在夏季高峰季节发展光诱作业和鱿钓作业,上半年进行养护,集中在下半年进行利用,以提高头足类资源的产业效益。

Base on the investigating data in the west sea area of continental shelf of the East China Sea （25°30＇--33°30＇N, 128°00＇E） from June 1994 to April 1996 and from 2004 to 2006, We studied the quantity distribution of cephalopod. In summer the cephalopod capture rate was 26.9 kg·h^-1 and this season was fastigium of quantity distribution, next in autumn（16.5 kg·h^-1）, the lowest was in spring, only 8.7 kg·h^-1. From June to December, the catch was higher than that in other times, the denseness center appeared in the Southeast area of Zhoushan fishing ground, Yushan fishing ground, and outboard sea area with the depth of 80-100 m in Wentai fishing ground. After enforcing the Summer Closed Fishing, the spawning area of cephalopod had been protected, but we couldn＇t make use of the summer fastigium, with the catch rate decrease with 14.7 %. It was suggested that the capture structure and capture period would be adjusted for enhancing the use efficiency of cephalopod, such as developing the lightinginducement capture and squid jigging capture in summer, as conservation in the first half year and exploiting in the second half year