福建诏安湾春、秋季鱼卵和仔稚鱼种类组成及数量变化

Species composition and quantity variation of fish eggs,larvae and juveniles in Zhao'an Bay,Fujian during spring and autumn

2012年10月和2014年5月在诏安湾海域进行了鱼卵、仔稚鱼的调查,对诏安湾秋季和春季的鱼卵和仔稚鱼的种类组成、数量和分布进行了研究。结果表明,本调查海域共鉴定的鱼卵7种、仔稚鱼7种,隶属于10科10属;秋季共采集到鱼卵31个和仔稚鱼47尾,密集区出现在湾口的西屿北侧海域,春季共采集到鱼卵662个和仔稚鱼69尾,密集区主要分布在诏安湾中部偏北海域和湾口西屿西侧海域。秋季主要优势种为隆头鱼科鱼类、美肩鳃鳚,春季主要优势种为黄姑鱼、红鳍笛鲷和美肩鳃鳚。与东山湾相比,春季诏安湾鱼卵密度明显较大、仔稚鱼资源密度略低;秋季两个海湾的鱼卵、仔稚鱼数量均处于低水平;两个海湾的产卵时期主要在春季。

The surveys of fish eggs, spring （October, 2012） and autumn well as quantity of temporal - spatial larvae and juveniles were carried out in Zhao＇an Bay of Fujian during （May, 2014）. The compositions of fish eggs, larvae and juveniles, as distribution in Zhao＇an Bay were studied. The results showed that 7 species of fish eggs, 7 species of larvae and juveniles had been indentified, belonging to 10 genera, 10 families. In autumn, a total of 31 fish eggs and 47 larvae and juveniles were collected, which intensive areas were at north side of West Island in bay mouth. In spring, a total of 662 fish eggs and 69 larvae and juveniles were collected, which intensive areas were at north - central waters and west side of West Island. The dominant species were Labridae sp. , Omobranchus elegans in autumn, while which were Nibea albiflora, Lutjanus erythropterus and Omobranchus elegans in spring. Compared with the data of Dongshan Bay, the mean densities of fish eggs were obviously greater, while the mean densities of fish larvae and juveniles were slightly lower in spring. The quantity of fish eggs, larvae and juveniles in the two bays were both at low level in autumn, which indicated spawning season of two bays was the same in spring.