鮻鱼稚鱼在沿岸碎波带的出现和滞留时间  

Occurrence and stay period of the juvenile Liza haematocheila in the surf zone of Yangtze Estuary

作　　者：钟俊生[1] 傅萃长[2] 郁蔚文[3] 吴美琴[1] 张增频 龚小玲[1] 胡芬5 

机构地区：[1]上海水产大学生命科学与技术学院,上海200090 [2]复旦大学生物多样性和生态工程教育部重点实验室,上海200433 [3]中国水产科学研究院渔业机械研究所,上海200092 [4]江西鹰潭供电公司,鹰潭335000

出　　处：《上海水产大学学报》2006年第3期281-285,共5页Journal of Shanghai Fisheries University

基　　金：农业部海洋与河口渔业重点开放实验室开放课题(技04-21);上海水产大学校长基金(科04-90);上海市重点学科建设项目资助(Y1101)

摘　　要：2004年3—8月在长江口沿岸碎波带5个站位用小型拖网（1m×4m，网目1mm）采集到鮻鱼稚鱼754尾，平均密度为10．9尾／网次，以6月的出现尾数最多，5月份最少。平均密度以St．2最高（80．6尾／网次）。通过研究St．2鮻鱼稚鱼的平均体长及生长规律，其平均体长呈逐月递增趋势，表明该鱼以沿岸碎波带作为其保育场。对205尾鮻鱼稚鱼的耳石日生长轮的观察结果，其日轮数与体长呈对数相关，并由耳石日轮数推算出其为3—6月孵化的个体。孵化后约20～46d的个体在沿岸碎波带水域进行短期生活。鮻鱼稚鱼在保育场的生长规律揭示了在进行海岸工程时必须强调对生态环境和水生生物保护的重要性。A total of 754 individuals （average density： 10.9 ind./haul） of Liza haematocheila juveniles were collected by a seine net（ 1 m × 4 m, mesh-aperture 1 mm）in the surf zone of Yangtze Estuary from March to August 2004. The highest abundance occurred in June and the least was in May. The highest density occurred at station 2 （80.6 ind./haul） which was a small and open beachland. Juvenile stage of the species used the surf zone as a nursery ground in which their average body length showed the increasing tendency monthly. Based on observing the otolith daily-rings of 205 individuals, the relation between otolith ring numbers and body length showed the logarithmic relation. Hatching dates estimated by otolith daily-rings were distributed from March to June. Liza haematocheila juveniles （20 - 46 days old） spent a short term in the surf zone. It is necessary to emphasize the environmental ecology of fish larvae and juveniles when reconstructing the sea coast in future.

关 键 词：鮻鱼 稚鱼 耳石 日龄 保育场 

分 类 号：S932.4[农业科学—渔业资源]