珠江口伶仃洋海域底层游泳动物的季节变化

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Abstract

The Lingding Bay,an important area for fishery resources,has endured the deterioration of ecological environment due to human activities.In order to understand the influence of deteriorative environment on the fisheries,seasonal variations of nekton were studied based on the data from four cruises conducted from August 2009 to April 2010 in the Lingding Bay of Pearl River Estuary.A total of 92 species was identified,including 54 species of fishes,32 crustaceans and 6 cephalopods.The species richness was recorded with a maximum in summer and a minimum in winter.The species number of nekton alternated significantly from spring to summer and from winter to spring.The dominant species were stable,which were Charybdis japonica,Oratosquilla kempi and Collichthys lucidus.Among them,Charybdis japonica dominated during the whole year,with the average density occupying 8.07% 26.22% of the total density.The seasonal variations of stock biomass and density of nekton were in accordance with the temperature,with their highest values in summer and the lowest ones in winter.The variations of temperature and salinity showed a seasonal distribution,with high temperature and low salinity in summer and autumn,low temperature and high salinity in winter and spring.Temperature played an important role in the influence of stock biomass and density of nekton in the Lingding Bay.Comparing with the historical data,we find that main commercial fishes and shrimps have been miniaturized in the Lingding Bay of Pearl River Estuary.

Key words： Nekton seasonal variation Lingding Bay Pearl River Estuary

Received: 25 February 2012

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	Articles by authors
	LI Kai-zhi
	YIN Jian-qiang
	HUANG Liang-min
	HUANG Zi-rong
	LIN Qiang
	Xiong Lan-lan

Cite this article:

LI Kai-zhi,YIN Jian-qiang,HUANG Liang-min, et al. Seasonal variations of bottom nekton in the Lingding Bay of Pearl River Estuary, China[J]. , 2012, 31(1): 1-7.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2012/V31/I1/1

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[1]	. [J]. Ecological Science, 2018, 37(1): 27-34.