正常与发病对虾养殖池塘浮游藻种类组成和异养细菌数量比较

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Abstract

The species composition of phytoplankton and heterotrophic bacteria number in the normal shrimp culturing ponds were compared to those in the disease-occurred ponds by trawling method and spread plate method.The results showed that 40 species of phytoplankton in 31 genera were observed,which belonged to Bacillariophyta,Chlorophyta,Cyanophyta,Pyrrophyta,Euglenophyta, Cryptophyta and Xanthophyta;however,only Scenedesmus dimorphus(Turp.) Kutz.and Oscillatoria sp.were observed in the four studied ponds.There were more phytoplankton classes and species in the normal shrimp culturing ponds than the diseased-occurred ponds.The abundances of Cyanophyta species were 6.16% and 9.77% respectively in the two normal shrimp culturing ponds and lower than those in the two disease-occurred ponds(18.85% and 43.38%),while the diversity and evenness indexes of phytoplankton in the two normal shrimp culturing ponds were higher.The similarities of phytoplankton community between different ponds were not related to the occurrence of diseases.The total number of heterotrophic bacteria in the disease-occurred ponds was higher than that in the normal shrimp culturing ponds.

Key words： Litopenaeus vannemei pond phytoplankton heterotrophic bacteria

Received: 25 August 2011

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	Articles by authors
	GUO Zhi-xun
	ZHANG Han-hua
	FENG Juan
	WANG Rui-xuan
	LIU Dong-hui
	LI Zhuo-jia

Cite this article:

GUO Zhi-xun,ZHANG Han-hua,FENG Juan, et al. Comparison of species composition of phytoplankton and heterotrophic bacteria number between normal shrimp culturing ponds and disease-occurred ponds[J]. , 2011, 30(4): 369-374.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2011/V30/I4/369

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