论文部分内容阅读
本文利用2001~2005年东海区底层拖网调查资料,分析了东海刺鲳的资源状况和数量分布。结果表明,东海刺鲳近年来资源数量稳定而且缓慢增长,2001~2005年平均资源密度为1.49kg/h,从数量分布来看,8、9月是刺鲳分布范围最广、资源密度最高的月份,主要分布海域为鱼山、江外和长江口渔场。分析4个季节刺鲳的分布水深变化情况表明,主要分布水深为50~90m,刺鲳分布具有季节移动现象,夏季最靠近近海。刺鲳的群体结构不稳定,以幼鱼和1龄鱼为主。
In this paper, we use the data of bottom trawl survey in the East China Sea from 2001 to 2005 to analyze the resource status and quantity distribution of the stingray. The results showed that the resources of Stichopus pilosula increased steadily and slowly in recent years, and the average resource density was 1.49 kg / h in 2001-2005. From the perspective of population distribution, the distribution of sturgeon in August and September was the most widespread and the highest in resource density In January, the main sea areas for the distribution are Yuanshan, Jiangou and Changjiang Estuary fisheries. Analysis of the distribution of water depth changes in the four seasons shows that the main distribution of water depth is 50 ~ 90m, the distribution of seabream has a seasonal movement phenomenon, the summer is closest to the offshore. Stingray group structure is unstable, with juvenile fish and 1-year-old fish.