The Impact of Planktivorous Fishes on Microcystin Concentrations in Meiliang Bay, Lake Taihu, China

Hua Yang Donghu Experimental Station of Lake Ecosystems State Key Laboratory for Freshwater Ecology and Biotechnology of China, Institute of Hydroiology Chinese Academy of Sciences, Wuhan, 430072, P. R. China

Ping Xie Donghu Experimental Station of Lake Ecosystems State Key Laboratory for Freshwater Ecology and Biotechnology of China, Institute of Hydroiology Chinese Academy of Sciences, Wuhan, 430072, P. R. China

Zhixin Ke Donghu Experimental Station of Lake Ecosystems State Key Laboratory for Freshwater Ecology and Biotechnology of China, Institute of Hydroiology Chinese Academy of Sciences, Wuhan, 430072, P. R. China

Yaqin Liu Donghu Experimental Station of Lake Ecosystems State Key Laboratory for Freshwater Ecology and Biotechnology of China, Institute of Hydroiology Chinese Academy of Sciences, Wuhan, 430072, P. R. China

Shikai Wu Donghu Experimental Station of Lake Ecosystems State Key Laboratory for Freshwater Ecology and Biotechnology of China, Institute of Hydroiology Chinese Academy of Sciences, Wuhan, 430072, P. R. China

Jun Xu Donghu Experimental Station of Lake Ecosystems State Key Laboratory for Freshwater Ecology and Biotechnology of China, Institute of Hydroiology Chinese Academy of Sciences, Wuhan, 430072, P. R. China

Longgen Guo Donghu Experimental Station of Lake Ecosystems State Key Laboratory for Freshwater Ecology and Biotechnology of China, Institute of Hydroiology Chinese Academy of Sciences, Wuhan, 430072, P. R. China

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ABSTRACT

In an eight-month enclosure experiment in Meiliang Bay of Lake Taihu, a shallow subtropical lake in China, silver carp (Hypophthalmichthys molitrix) and bighead carp (Aristichthys nobilis) collectively reduced cyanobacterial biomass. Microcystin concentration was six times higher in the 0.35 km² control enclosure (without fish) than in two similar-sized enclosures that had been stocked with both carp species. Furthermore, toxic Microcystis spp. increased microcystin production when exposed to silver carp and bighead carp.

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The Impact of Planktivorous Fishes on Microcystin Concentrations in Meiliang Bay, Lake Taihu, China

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The Impact of Planktivorous Fishes on Microcystin Concentrations in Meiliang Bay, Lake Taihu, China

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