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长江口沿岸碎波带仔稚鱼的种类组成及其多样性特征
引用本文:蒋日进,钟俊生,张冬良,傅萃长.长江口沿岸碎波带仔稚鱼的种类组成及其多样性特征[J].动物学研究,2008,29(3):297-304.
作者姓名:蒋日进  钟俊生  张冬良  傅萃长
作者单位:1. 上海海洋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
基金项目:国家自然科学基金 , 上海市教委一般项目 , 农业部东海区渔政渔港监督管理局项目 , 上海市重点学科建设项目
摘    要:为了进一步探明长江口沿岸碎波带仔稚鱼的种类组成和多样性特征,2006年7月-2007年6月的每月大潮期间,在长江口沿岸碎波带13个站位点的水深0.5-1.5m处,两人沿海岸平行方向步行拖曳小型拖网(1m×4m,网目1mm)采集仔稚鱼样本。周年共拖网397网次,采集到仔稚鱼49045尾。仔稚鱼隶属于31科,共84种,其中海洋性鱼类16种,河口性鱼类30种,洄游性鱼类4种,淡水性鱼类34种。洄游性鱼类刀鲚占总个体数的82.63%,为最优势种。仔稚鱼的物种数、个体数和丰度在冬季较低,以3月份最低,夏季最高。Margalef丰富度指数2006年11月—2007年4月相对较低,2006年10月最高。Shannon-Wiener多样性指数在10月最高,7月最低。Pielou均匀度指数全年较恒定,2006年7月和2007年6月相对较低。

关 键 词:长江口  碎波带  仔稚鱼  种类组成  多样性  季节动态
收稿时间:2007-12-17

Species Composition and Diversity of Fish Larvae and Juveniles in the Surf Zone of the Yangtze River Estuary
JIANG Ri-jin,ZHONG Jun-sheng,ZHANG Dong-liang,FU Cui-zhang.Species Composition and Diversity of Fish Larvae and Juveniles in the Surf Zone of the Yangtze River Estuary[J].Zoological Research,2008,29(3):297-304.
Authors:JIANG Ri-jin  ZHONG Jun-sheng  ZHANG Dong-liang  FU Cui-zhang
Institution:1. College of Aqua-life Science and Technology, Shanghai Ocean University, Shanghai 200090, China;
2. Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering,Institute of Biodiversity Science, School of Life Sciences, Fudan University, Shanghai 200433, China
Abstract:This study investigated species composition and diversity of fish larvae and juveniles in the surf zone of the Yangtze River estuary to reveal the importance of this habitat as a fish nursery ground. Fish larvae and juveniles were collected monthly at 13 stations on the spring tide during July 2006 and June 2007. Samples were conducted along the surf zone (depth of 0.5-1.5 m) using a seine net (1 m×4 m, 1 mm mesh-aperture). Each haul was made parallel to the shore for a distance of about 50 m. A total of 49 045 fish larvae and juveniles were collected representing 84 species from 31 families. They included 16 marine species, 30 estuarine species, 4 diadromous species and 34 freshwater species. Coilia nasus was the most dominant species accounting for 82.63% of the total. The number of species, individual and abundance were lower in winter with the minimum number in March and maximum in summer. The Margalef index was relatively low between November 2006 and April 2007, the highest being in October 2006. The Shannon-Wiener diversity index was the highest in October 2006 and the lowest in March 2007. The Pielou evenness index was invariable throughout the whole year and relatively low in July 2006 and June 2007.
Keywords:Yangtze River estuary  Surf zone  Fish larvae and juveniles  Species composition  Species diversity  Seasonal dynamics
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