青鱼—鲢、鳙生态池塘浮游生物群落结构特征及其与环境因子的关系

doi:10.16378/j.cnki.1003-1111.20212

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Abstract In order to study the relationship between plankton community structure and environmental factors in the ecological culture ponds of black carp Mylopharyngodon piceus-silver carp Hypophthalmichthys molitrix and bighead carp Aristichthys nobilis from April to October 2015, the plankton and physicochemical properties of water quality were monitored in three black carp culture ponds. The results showed that a total of 112 species of phytoplankton were detected in ecological culture ponds, including Chlorophyta (47), Euglenophyta (30) and Bacillariophyta (17) being the dominant taxonomy. The dominant species were Cyclotella comta, Chlorella vulgaris and Scenedesmus armatus. The average density and biomass of phytoplankton were 3.24×10⁷ ind./L and 32.10 mg/L. A total of 96 species of zooplankton were detected, including 42 protozoa, 40 rotifers, 9 branchopods and 5 copepods. The dominant species were Anuraeopsis fissa, Polyarthra trigla Ehrenberg and Trichocerca pusilla, with average zooplankton density and biomass of 6.08×10⁴ ind./L and 5.20 mg/L. The diversity index of phytoplankton and zooplankton in different months were Shannon-Wiener′s diversity index (1.8—2.5 and 2.9—4.5), species richness index (2.5—4.9 and 1.2—4.1), and species evenness index (0.51—0.69 and 1.5—2.8). In addition, the relationship between plankton community and physicochemical factors in water was discussed through Pearson correlation analysis and redundancy analysis (RDA). It was found that pH, water temperature (T), transparency (SD) and dissolved oxygen (DO) were the main environmental factors affecting the plankton community structure in the ecological culture ponds of black carp, silver carp and bighead carp. Therefore, in actual production, the composition and quantity of plankton community structure in aquaculture water can be controlled by regulating water quality, so as to improve aquaculture yield. Meanwhile, water quality management should be strengthened in the weather of high temperature and hypoxia.

Key words： Mylopharyngodon piceus plankton community structure pond culture redundancy analysis (RDA)

Received: 21 September 2020

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	Articles by authors
	GONG Jinling
	LI Xuemei
	HE Yongfeng
	YANG Deguo
	ZHU Yongjiu

Cite this article:

GONG Jinling,LI Xuemei,HE Yongfeng, et al. Relationship between Plankton Community Structure and Environmental Factors in Ecological Culture Ponds of Black Carp Mylopharyngodon piceus-Silver Carp Hypophthalmichthys molitrix and Bighead Carp Aristichthys nobilis[J]. Fisheries Science, 2022, 41(4): 517-526.

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https://www.shchkx.com/EN/10.16378/j.cnki.1003-1111.20212 OR https://www.shchkx.com/EN/Y2022/V41/I4/517

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