胶州湾鱼卵、仔鱼和稚鱼的分布

2003年1月-2004年1月在胶州湾海域逐月进行连续13个航次的调查,对胶州湾鱼卵、仔鱼和稚鱼的种类组成、丰度和主要种类的分布进行了研究。结果表明,采集到的鱼卵均为浮性鱼卵。鱼卵丰度最高值出现在8月(5.02粒/m3),次之为5月(4.97粒/m3)。共采集到仔、稚鱼10种,隶属9科10属,优势种为刺鱼叚虎鱼、斑鱼祭和玉筋鱼。根据出现的季节和出现时间的长短,将仔、稚鱼分为暖季类群、暖季短时类群和冷季类群三种类群。暖季类群较冷季类群占有明显的优势。暖季短时类群的种数、丰度和站位出现率都比较低。仔、稚鱼的丰度、种数的季节变化显著,最大值均出现在6月份,丰度是16.34尾/m3,种数为7种,与海水月平均温度的季节变化节律基本一致。

Distributions of Fish Eggs and Larval Fish in the Jiaozhou Bay

Based on 13 cruises of monthly data observed in the Jiaozhou Bay during January 2003 to January 2004,the species composition,abundance and main species distributions of fish eggs and larval fish in the Jiaozhou Bay were studied.It is shown from the study results that the collected fish eggs are all pelagic egg,the maximum abundance of fish eggs occurred in August(5.02 ind/m3),and the next one occurred in May(4.97 ind/m3).10 species of larval fish were identified during the field surveys,they belong to 9 fa-milies,10 genera,and the dominant species are Acanthogobius sp.,Clupanodon punctatus and Ammodytes personatus.The larval fish can be divided into three groups,warm season group,warm season and short-time group and cold season group,the warm season group was dominating over the cold season group,and the speies number,abundance and occurrence rate at sampling stations of the warm season and short-time group were comparatively low.The seasonal variations in abundance and species number of larval fish are obvious,the maximum abundance and species number all occurred in June with the maximum abundance being 16.34 ind/m3 and the maximum species number being 7,which is basically consistent with the seasonal variations in monthly mean seawater temperature.