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A non-classical biomanipulation experiment in Gonghu Bay of Lake Taihu: control of Microcystis blooms using silver and bighead carp
Guo, Longgen; Wang, Qing; Xie, Ping; Tao, Min; Zhang, Jing; Niu, Yuan; Ma, Zhimei
2015-09-01
Source PublicationAQUACULTURE RESEARCH
ISSN1355-557X
Volume46Issue:9Pages:2211-2224
Abstract

A non-classical biomanipulation experiment was carried out in Gonghu Bay of Lake Taihu in 2009. Silver and bighead carp were stocked in a large fish enclosure to control cyanobacterial blooms. Water quality, plankton abundance, and the intracellular and extracellular microcystins (MCs) in lake water were investigated monthly in 2009. The concentrations of nitrogen nutrients were significantly lower in the fish enclosure than in the surrounding lake, while phosphorus (especially total phosphorus) concentration was higher in fish enclosure. During the blooming period, Cyanophyta contributed to more than 90% of the phytoplankton in the surrounding lake, whereas it represented only 40-80% in the fish enclosure. The phytoplankton and crustacean zooplankton biomasses and the zooplankton/phytoplankton ratios were all significantly lower in the fish enclosure than in the lake. This result suggested that silver and bighead carp can effectively suppress the phytoplankton biomass with the initial stocking density of 7.5gm(-3) for silver carp and 1.1gm(-3) for bighead carp, despite a simultaneous decrease in the grazing pressure of the zooplankton on the phytoplankton. During the blooming period, the intracellular and extracellular MCs in the fish enclosure were reduced by 93.8% and 69.8% compared with the surrounding lake. MCs content varied from 0.34 to 18.8ng (mean 4.8ng) MC-LReqg(-1) wet weight in the muscle sample of silver and bighead carp in the experimental enclosure, which suggested that these fish were safe to consume for human. However, the long-term effects of MCs on aquatic ecosystem and on public health cannot be overlooked.

SubtypeArticle
KeywordLake Taihu Silver Carp Bighead Carp Microcystis Bloom Microcystin
DOI10.1111/are.12375
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Indexed BySCI
Language英语
WOS Research AreaFisheries
WOS SubjectFisheries
WOS IDWOS:000358534500017
WOS KeywordHYPOPHTHALMICHTHYS-MOLITRIX ; ENCLOSURE EXPERIMENT ; IN-SITU ; EUTROPHIC LAKE ; ARISTICHTHYS-NOBILIS ; COMMUNITY STRUCTURE ; PHYTOPLANKTON ; FISH ; PLANKTON ; DYNAMICS
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Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/25962
Collection淡水生态学研究中心_期刊论文
AffiliationChinese Acad Sci, Inst Hydrobiol, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol China, Wuhan 430072, Peoples R China
Recommended Citation
GB/T 7714
Guo, Longgen,Wang, Qing,Xie, Ping,et al. A non-classical biomanipulation experiment in Gonghu Bay of Lake Taihu: control of Microcystis blooms using silver and bighead carp[J]. AQUACULTURE RESEARCH,2015,46(9):2211-2224.
APA Guo, Longgen.,Wang, Qing.,Xie, Ping.,Tao, Min.,Zhang, Jing.,...&Ma, Zhimei.(2015).A non-classical biomanipulation experiment in Gonghu Bay of Lake Taihu: control of Microcystis blooms using silver and bighead carp.AQUACULTURE RESEARCH,46(9),2211-2224.
MLA Guo, Longgen,et al."A non-classical biomanipulation experiment in Gonghu Bay of Lake Taihu: control of Microcystis blooms using silver and bighead carp".AQUACULTURE RESEARCH 46.9(2015):2211-2224.
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