Heavy metal contamination and health risk assessment of tiger puffer Takifugu rubripes farmed in a recirculating tank
WANG Xuankai, ZHAO Tong, YUE Yang, WANG Houyu,QU Baocheng*, XIONG Yuyu, ZHANG Yufeng
1.Key Laboratory of Environment Controlled Aquaculture, Ministry of Education (Dalian Ocean University), Dalian 116023, China; 2.Dalian Center for Certification and Food and Drug Control, Dalian 116630, China
Abstract: In order to evaluate the quality and safety of tiger puffer Takifugurubripes farmed in a recirculating tank, the contents of lead (Pb), cadmium (Cd), mercury (Hg), copper (Cu) and chromium (Cr) were determined in tiger puffer with average body weight of 2.3 g (juvenile), 1 091.4 g(sub-adult), and 1 718.1 g (adult) sampled from an industrial aquaculture enterprise in Dalian, Liaoning Province at different developmental by inductively coupled plasma mass spectrometry (ICP-MS). The results showed that the contents of different heavy metals in the body of the tiger puffer were not shown to exceed the safety standards of “National standards for food safety, limits of pollutants in food”(GB 2762—2017) and “Limits of toxic and harmful substances in non polluted food and aquatic products”(NY 5073—2006). The changes in heavy metal contents in the tiger puffer in different culture stages showed that Cu and Cr were the main metal elements enriched in liver (P<0.05) and Cr in muscle (P<0.05), without significant difference in contents of Cd, Hg, Cu and Cr in tiger puffer in different developmental stages (P>0.05), and with significant difference in the contents of Cd, Hg and Cu in different tissues (P<0.05). The assessment of heavy metal pollution in fish body showed that single factor pollution index and Nemerow comprehensive pollution index were in the non-pollution range, and according to the estimated daily intake, carcinogenic risk and non-carcinogenic risk, the contribution of daily intakes to health risks is expected to be small, cancer risk in children and adults is within acceptable limits, and non-cancer risk is negligible, but the overall health risk in children is slightly higher than that in adults. The findings indicate that the levels of heavy metals in tiger puffer can be controlled within a safe range in the recirculating aquaculture system.
2022, Vol. 37 
