Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2016, Vol. 32 ›› Issue (32): 34-41.doi: 10.11924/j.issn.1000-6850.casb16080023

Special Issue: 水产渔业

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Effects of Dissolved Oxygen, Alkalinity, Total Suspended Solid on Concentrations of Heavy Metals in Water and Muscle of Tilapia (Oreochromis niloticus) in Recirculating Aquaculture Systems

Wang Zhenhua1,2,3, Guan Chongwu2, Song Hongqiao2, Ye Xueping1   

  1. (1Ministry of Agriculture, Key Laboratory of Healthy Freshwater Aquaculture, Zhejiang Institute of Freshwater Fisheries, Huzhou Zhejiang 313001; 2Fishery Machinery and Instrument Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200092; 3College of Environmental Science and Engineering, Tongji University, Shanghai 200092)
  • Received:2016-08-04 Revised:2016-11-01 Accepted:2016-08-25 Online:2016-11-15 Published:2016-11-15

Abstract: To investigate the effects of water parameters on the concentrations of heavy metals in water and fish muscle in recirculating aquaculture systems (RAS), using tilapia (Oreochromis niloticus) weighed (57.9±0.87) g as experimental creature, we conducted a 60-day experiment in 8 small RASs simulating the actual work condition with changing several water parameters including alkalinity, dissolved oxygen (DO) and total suspended solid (TSS). The results showed that at the end of the experiment, alkalinity had obvious effect on the content of Cu, Zn in water and content of Zn in muscles; dissolved oxygen had obvious effect on the content of Cu in water and contents of Cu, Zn in muscles; TSS had no significant effect on contents of heavy metals in both water and muscles. However, in such experimental conditions, the contents of heavy metals in the muscle (the edible part of fish) of tilapia were under the limits of the national and industrial standards.

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