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杭州湾北部水域仔稚鱼组成的月度及年间比较
引用本文:胡敏,钟俊生,唐子涵,闫欣,仇延舫,侯世挺.杭州湾北部水域仔稚鱼组成的月度及年间比较[J].上海海洋大学学报,2017,26(1):103-112.
作者姓名:胡敏  钟俊生  唐子涵  闫欣  仇延舫  侯世挺
作者单位:上海海洋大学,上海海洋大学
基金项目:国家科技支撑项目(2012BAC07B03);上海市海洋局项目(沪海科2015-02)
摘    要:2014年6月至2015年5月在杭州湾北部水域设置10个站点,按月以大型仔稚鱼网对该水域进行仔稚鱼资源调查,并与2013年1-12月的研究结果对比,旨在探明杭州湾北部水域仔稚鱼资源的年变动。本研究共采集仔稚鱼96 118尾,平均密度为0.79 ind./m3,隶属于23科55种,个体数、种类数和平均密度均小于2013年。两年共有种类有46种,且优势种均为髭缟虾虎鱼(Tridentiger barbatus)、棘头梅童鱼(Collichthys lucidus)和凤鲚(Coilia mystus)。两年间仔稚鱼发育阶段组成,均以前弯曲期仔鱼为主。对两年仔稚鱼密度分布分析表明,各站位仔稚鱼密度分布差异显著(P0.05);月份间仔稚鱼密度分布差异不显著(P0.05)。多样性分析表明两年多样性指数季节性变化明显,均在夏季较高、冬季较低。本次调查夏季Margalef丰富度指数(D)、Shannon-Wiener指数(H')和Pielou均匀度指数(J')均高于2013年夏季。

关 键 词:杭州湾  仔稚鱼  种类组成  年度变化
收稿时间:2016/4/19 0:00:00
修稿时间:2016/5/17 0:00:00

Monthly and annual comparison of fish larvae and juveniles composition in the north of Hangzhou Bay
HU Min,ZHONG Junsheng,TANG Zihan,YAN Xin,QIU Yanfang and HOU Shiting.Monthly and annual comparison of fish larvae and juveniles composition in the north of Hangzhou Bay[J].Journal of Shanghai Ocean University,2017,26(1):103-112.
Authors:HU Min  ZHONG Junsheng  TANG Zihan  YAN Xin  QIU Yanfang and HOU Shiting
Institution:Shanghai Ocean University,Shanghai Ocean University
Abstract:To clarify the annual changes of fish larvae and juveniles resource, monthly collections were held by a larva net in the north of Hangzhou Bay from June in 2014 to May in 2015. There were 10 sampling stations in this study. A total of 96 118 individuals were caught which belonged to 23 families and 55 species.The average density was 0.79ind./m3. 46 common species occurred in both years, while the abundance, species richness and average density were lower in 2014-2015. Tridentiger barbatus, Collichthys lucidus and Coilia mystus predominated in both two years. Development stage showed a similar tendency and pre-flexion larvae were dominant in 2 years. The density was significantly different(P<0.05) among stations and not significantly different(P>0.05) among months. The number of Margalef richness index(D) demonstrated distinct seasonal variations:they were higher in summer and lower in winter.The results of Margalef richness index(D), Shannon-Wiener diversity index(H'') and Pielou evenness index(J'') in summer of this research were higher than in 2013.
Keywords:Hangzhou Bay  fish larvae and juveniles  species composition  annual changes
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