江苏沿岸中华小公鱼仔稚鱼的分布特征及其与环境的关系

Abundance and distribution of larvae and juveniles of Stolephorus chinensis in the coast of Jiangsu Province and its relationship with environmental factors

根据2006-2007年"苏通渔01110"渔船按季度对江苏省沿岸海域(119°00′-123°00′E、31°40′-35°50′N)进行仔稚鱼种类组成及数量分布的调查。从中对筛选出的中华小公鱼(Stolephorus chinensis)仔稚鱼资源空间分布及其与环境关系进行了探讨。结果表明:夏季共采集到443尾,平均每站为36.9尾,以前弯曲期仔鱼为主;秋季共采集417尾,平均每站为34.8尾,以后弯曲期仔鱼和稚鱼为主。结合环境数据和历史调查资料分析表明,低盐度的水域更适合中华小公鱼的个体生长;水温和盐度的变化影响了该调查海域优势种鳀鱼的分布,显示了中华小公鱼在该海域内的数量优势作用。

The spatial and temporal distribution of the early life stages of Stolephorus chinensis survey were carried out by the boat ＂Sutong Yu No. 01110＂ along the coast of Jiangsu Province during 2006 and 2007. Sampling regions were 119°00′-123°00′E、31°40′-35°50′N . The abundance of larvae and juveniles were investigated by horizontal towing on the sea surface at a speed of 1 -2kn at each sampling station. The towing time was 10 minutes. In summer , a total of 443 larvae and juveniles of Stolephorus chinensis were collected , the average density was 36.9 ind. / station , the dominant stage was pre-flexion. In autumn, a total of 417 larvae and juveniles of Stolephorus chinensis were collected , the average density was 34.8 ind. / station , the dominant stages were post-flexion and juveniles. The composition differences between summer and autumn in this species showed that the stages and abundance of fish larvae and juveniles were related to temperature and salinity changes. It will have some effect on the ichthyoplankton composition in the coast of Jiangsu Province.