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长江口南支仔稚鱼数量随潮汐变化的研究
引用本文:侯世挺,钟俊生,王晓东,钱伟兵,罗一鸣.长江口南支仔稚鱼数量随潮汐变化的研究[J].上海海洋大学学报,2018,27(2):250-258.
作者姓名:侯世挺  钟俊生  王晓东  钱伟兵  罗一鸣
作者单位:上海海洋大学水产与生命学院;崇明县农业委员会执法大队
基金项目:国家科技支撑计划项目(2012BAC07B03);上海市海洋局项目(沪海科2015-02)
摘    要:2015年3月至2016年3月,在长江口南支江面上设置8个站位点,每月大潮期间用大型仔稚鱼网(1.3 m口径,0.5 mm网目)进行水平拖网,年间共拖网171网次,共采集仔稚鱼74 689尾,隶属于12科39种,5月到9月的丰富度较高,涨潮时的丰富度大于退潮,物种数以6、7月最多,密度以7月最高。贝氏(Hemiculter bleekeri,53.4%)为最优势种,其次为子陵吻虾虎鱼(Rhinogobius giurinus,12.65%),翘嘴鲌(Culter alburnus,8.38%),鳊鱼(Parabramis pekinensis,7.18%)、青鱼(Mylopharyngodon piceus,6.55%)和有明银鱼(Salanx ariakensis,4.63%)。涨潮时全年共渔获仔稚鱼39种,退潮时共渔获23种,并且各月份涨潮时的种类数均大于退潮时的种类数,St.6至St.8各站点涨潮时的密度均大于退潮时的密度。在St.7站位点进行中层拖网,在种类组成上与表层差异不明显,但多样性均不如表层。

关 键 词:长江口  仔稚鱼  种类组成  潮汐变化
收稿时间:2017/3/28 0:00:00
修稿时间:2017/5/3 0:00:00

The study on the amount changes of fish larvae during flood and ebb in the south branch of Yangtze River Estuary
HOU Shiting,ZHONG Junsheng,WANG Xiaodong,QIAN Weibing and LUO Yiming.The study on the amount changes of fish larvae during flood and ebb in the south branch of Yangtze River Estuary[J].Journal of Shanghai Ocean University,2018,27(2):250-258.
Authors:HOU Shiting  ZHONG Junsheng  WANG Xiaodong  QIAN Weibing and LUO Yiming
Institution:College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China,College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China,College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China,Law Enforcement Team, Agriculture Commission of Chongming County, Shanghai 202150, China and College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China
Abstract:To clarify the amount changes of fish larvae during flood and ebb in the south branch of Yangtze River Estuary, 8 stations were set in the south branch of Yangtze River Estuary, and the trawling was performed in the surface monthly by a larval net (1.3 m mouth-diameter,mesh 0.5 mm)during March 2015 to March 2016. A total of 74 689 individuals were collected in the 171 trawls, belonging to 39 species, 12 families. The richness during May to September is higher, while the richness is higher in the flood tide than the ebb tide. The species number during June to July is the highest, the density of fish larvae is the highest in July. Hemiculter bleekeri(53.4%) is the dominant species, followed by Rhinogobius giurinus(12.65%), Culter alburnus(8.38%),Parabramis pekinensis(7.18%),Mylopharyngodon piceus(6.55%),Salanx ariakensis(4.63%). In the throughout flood and ebb tide survey, 39 species were collected at flood tide, while 23 species in the ebb. The species number is higher at flood tide in each month, and the density of fish larvae is also higherat flood tide at each station of St.6 to St.8. The trawl was performed in the middle layer at St.7, as the result, the species composition of fish larvae has no significant difference with the surface layer at St.7, while the diversity is lower than the surface layer.
Keywords:Yangtze River Estuary  fish larvae  species composition  tidal variation
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