SCSIO OpenIR  > 热带海洋环境国家重点实验室(LTO)
Phytoplankton growth on organic nutrients from trash fish
Gao, YL; Yin, KD; He, L; Harrison, PJ;
AbstractTrash fish is common feed for caged fish in marine aquaculture. Most feed is not eaten and enters the water surrounding fish farms. The organic matter in trash fish is a nutrient source contributing to aquatic eutrophication impacts such as algal blooms and low oxygen. The objective of this study was to examine whether phytoplankton utilized organic matter of trash fish directly. Fifteen microalgae species were cultured in the medium made of open oceanic water with f/2 enrichment (Treatment A, f/2 medium), with only silicate added (Treatment B, for diatom species) and with fish tissue+silicate (Treatment C). Four species grew significantly faster on fish tissue than in f/2 medium, another 4 species had similar growth rates between the two treatments (A and C). Growth rates of Pyramimonas sp. on different amount of fish tissue appeared to increase initially with increasing added fish tissue weight, reached a maximum at an intermediate amount of fish tissue additions. Time course of batch culture of Chaetoceros curvisetus showed that the species was capable of utilizing organic nitrogen released from fish tissue and grew well. Dissolved organic nitrogen (DON) was lower in the batch culture with algae and fish tissue than that with fish tissue but without algae in the medium, which indicated a direct utilization of DON during algal growth. These results indicated that fish tissue could be a direct nutrient source to support phytoplankton growth and coastal management needs to pay attention to organic contamination from trash fish.
Department[Yin, Kedong; He, Lei] Sun Yat Sen Univ, Sch Marine Sci, Guangzhou 510275, Guangdong, Peoples R China; [Gao, Yongli] Chinese Acad Sci, State Key Lab Trop Oceanog, S China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China; [Yin, Kedong] Griffith Univ, Environm Futures Ctr, Nathan, Qld 4111, Australia; [Harrison, Paul J.] Hong Kong Univ Sci & Technol, Div Environm, Kowloon, Hong Kong, Peoples R China
KeywordAlgal Growth Dissolved Organic Matter Eutrophication Pollution
Subject AreaEcology ; Environmental Sciences ; Marine & Freshwater Biology ; Water Resources
Funding ProjectLTO
WOS IDWOS:000306323300017
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Recommended Citation
GB/T 7714
Gao, YL,Yin, KD,He, L,et al. Phytoplankton growth on organic nutrients from trash fish[J]. AQUATIC ECOSYSTEM HEALTH & MANAGEMENT,2012,15(2):234-240.
APA Gao, YL,Yin, KD,He, L,Harrison, PJ,& growth on organic nutrients from trash fish.AQUATIC ECOSYSTEM HEALTH & MANAGEMENT,15(2),234-240.
MLA Gao, YL,et al."Phytoplankton growth on organic nutrients from trash fish".AQUATIC ECOSYSTEM HEALTH & MANAGEMENT 15.2(2012):234-240.
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