厦门南部海域春季鱼卵、仔稚鱼种类组成与数量分布

根据2013年4月在厦门南部海域的调查资料,对其鱼卵和仔稚鱼的种类组成与数量分布特点进行初步研究和探讨.结果表明,本调查海域春季共出现鱼卵和仔稚鱼21种,其中鱼卵14种,仔稚鱼9种.21个种类隶属于16科.鱼卵、仔稚鱼数量主要以黄姑鱼（Nibea albifora）、青鳞小沙丁鱼（Sardinella zunasi）和鰕虎鱼科（Gobiidae sp.）为主;春季水平拖网鱼卵和仔稚鱼平均密度分别为107.7 ind/网和1.0ind/网,垂直拖网鱼卵和仔稚鱼平均密度分别为0.69 ind/m3和0.47 ind/m3;春季鱼卵数量分布以浯屿岛东侧的11站位和小金门岛北侧的9站位较为集中,仔稚鱼以下鸡屿北侧的4站位和大担岛东南侧的12站位较为集中.比较以往的研究成果,随着厦门南部海域的高度开发利用,海域生态环境已发生很大变化,导致鱼卵、仔稚鱼种类数明显减少,主要优势种也发生较大变化.

Species composition and quantity distribution of fish eggs,larvae and juveniles in south of Xiamen in spring

The surveys of species composition and distribution of fish eggs, larvae and juveniles were carried out in south of Xiamen in spring 2013. The results showed that there were 21 species, 16 families of fish eggs, larvae and juveniles had been indentified, including 14 species of fish eggs and 9 species of fish larvae and juveniles. Fish eggs, larvae and juveniles in south of Xiamen in spring were mainly consists of Nibea albi- fora, Sardinella zunasi and Gobiidae sp. For fish eggs, larvae and juveniles in south of Xiamen in spring, the mean densities were 107.7 ind/net and 1.0 ind/net by horizontal trawling, and 0. 69 ind/m3 and 0.47 ind/m3 by vertical trawling. Intensive areas of fish eggs were station 11 （ east of Wuyu Island） and station 9 （ north of Little Kinmen Island） , while fish larvae and juveniles mainly distributed in station 4 （ north of Xia- jiyu Island） and station 12 （southeast of Dadan Island）. Compared with the past, with vigorous development of south sea area of Xiamen, environment had greatly varied, the species numbers of ichthyoplankton had decreased, and the dominant species had changed.