摘要
2004年3月-2005年3月,按月在长江口沿岸碎波带沿海岸平行方向,用小型拖网共采集到仔稚鱼6 892尾,属于23科,约50种。其中科的刀鲚占总个体数的55.19%,其后依次为银飘鱼(16.99%)、鱼(10.94%)、纹缟虾虎鱼(3.92%)、斑尾刺虾虎鱼(2.67%)、鳜(1.68%)、少鳞(1.68%)、普氏细棘虾虎鱼(0.99%)、弹涂鱼(0.99%)、黄鳍刺虾虎鱼(0.89%),这10种的个体数占据了总捕获个体数的96%。长江口沿岸碎波带中,既生活着洄游性鱼类和河口性鱼类仔稚鱼,还生活着近岸海水鱼类和淡水鱼类仔稚鱼。该水域仔稚鱼的种类和平均密度具有季节性变化趋势。根据在长江口沿岸碎波带仔稚鱼的出现和季节性变化规律,对该水域的仔稚鱼资源提出了保护措施。
A total of 6 892 fish larvae and juveniles, representing over 50 species from 23 families, were collected by monthly seine net in the surf zone of the Yangtze River estuary from March 2004 to March 2005. The most dominant species, Coilia nasus, was accounted for 55.19%, and then Pseudolaubuca sinensis （ 16.99% ）, Liza haernatocheila （10.94%）, Tridentiger trigonocephalus （3.92%）, Acanthogobius ommaturus （2.67%）, Siniperca chuatsi （ 1.68% ）, SiUago japonica （ 1.68% ）, Acentrogobius pflaumii （0.99%）, Periophthalmus modestus （0.99%）, Acanthogobius flavimanus （0.89%）. These 10 species were accounted for 96% in the total abundance. In the surf zone of the Yangtze River estuary, there were not only the fish larvae and juveniles of migrating fishes and estuary fishes, but also the fish larvae and juveniles of coastal marine fishes and freshwater fishes. And the number of species and mean density showed seasonal tendencies. According to the regulation of seasonal occurrences of fish larvae and juveniles in the surf zone of the Yangtze River estuary, some protective measure for fish larvae and juveniles resources were offered.
出处
《上海水产大学学报》
CSCD
北大核心
2005年第4期375-382,共8页
Journal of Shanghai Fisheries University
基金
上海水产大学校长基金(科04-90)
农业部海洋与河口渔业重点开放实验室开放课题(技04-21)
上海市重点学科建设项目(Y1101)
中国水产科学研究院渔业水体净化技术和系统研究重点开放实验室项目(2004-16)
关键词
长江口
碎波带
仔稚鱼
种类组成
季节性变化
the Yangtze River estuary
the surf zone
fish larvae and juveniles
species composition
seasonal occurrence
