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题名: PHOTOSYNTHETIC ACTIVITY OF Microcystis IN FISH GUTS AND ITS IMPLICATION FOR FEASIBILITY OF BLOOM CONTROL BY FILTER-FEEDING FISHES
作者: Wang, Zhicong1; Li, Zhongjie1; Zhou, Yiyong1; Li, Dunhai1
关键词: Microcystis bloom ; filter-feeding fish ; microcystin ; photosynthetic activity
刊名: FRESENIUS ENVIRONMENTAL BULLETIN
发表日期: 2015
卷: 24, 期:7, 页:2384-2393
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
英文摘要: In a background of increasingly frequent and intensive Microcystis blooms occurred in eutrophic lakes, many countries, particularly China, have used filter-feeding fish to control algal blooms according to non-traditional biomanipulation theory. However, there is little information concerning the potential photosynthetic activity of cyanobacteria in the guts of planktivorous fishes. To make a scientific assessment of this algal control technology, we evaluated the effects of digestion by two fish species, silver carp and bighead carp, on the growth potential of Microcystis blooms in terms of photosynthetic activity, metabolic activity, up-floating velocity, morphological size, and toxin production. The results showed that: 1) the potential photosynthetic activity of Microcystis dropped significantly in fish foreguts after ingestion, but gradually increased and recovered in the midgut and hindgut; 2) digestion by planktivorous fish could significantly decrease the colonial size and up-floating velocity of Microcystis; 3) selective digestion by bighead carp caused a sharp rise in cellular microcystin levels; and 4) Microcystis retained a high growth potential after digestion by filter-feeding fish. These results indicate that planktivorous fish could be used for controlling blooms due to the degree of digestion and long retention of Microcystis in fish guts, but the controlling effect was limited because the potential photosynthesis activity of algae gradually recovered along the gut sections and the digested algae could grow normally after subsequent release into lakes. In addition to being less effective at controlling algal blooms than silver carp, the digestion process in bighead carp might confer an advantage to toxic Microcystis species.
关键词[WOS]: LAKE TAIHU ; BIGHEAD CARP ; SILVER CARP ; IN-SITU ; AERUGINOSA ; CHINA ; FLUORESCENCE ; REMOVAL ; GROWTH
语种: 英语
项目资助者: National Science Foundation of China(41230748 ; State Key Laboratory of Freshwater Ecology and Biotechnology(2011FBZ15) ; Major Science and Technology Program for Water Pollution Control and Treatment(2012ZX07103-004-02) ; 31300391)
WOS记录号: WOS:000363071700015
ISSN号: 1018-4619
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/27333
Appears in Collections:水环境工程研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China
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