Comparative Study of Metal Accumulation in Three Fish Species (Silurus asotus, Cyprinus carpio, and Carassius auratus auratus) from the Jinsha and Tuo Rivers Located Upstream of the Yangtze River, China
The concentrations of lead, chromium, cadmium, arsenic, and mercury were analyzed in the muscle and liver (hepatopancreas) of three fish species (Silurus asotus, Cyprinus carpio, and Carassius auratus auratus) from the Jinsha and Tuo Rivers. The above mentioned metal concentrations in the muscles of the three fish species were below the permissible limits, indicating that these fishes are safe for human consumption. The concentration of mercury in the carnivorous fishes was higher than that in the omnivorous fishes. There was no significant difference in growth rate and the concentration of lead, chromium, cadmium, arsenic, and mercury among the fishes from Panzhihua and Fushun. In the two age groups, the concentration of mercury did not vary significantly with growth rate of fish. The relationship between heavy metal concentration and growth rate of fish varied with metal species, fish species, and fish tissue.
KeywordsBioaccumulation Heavy metals Fish Jinsha River Tuo River
This work was supported by the Natural Science Foundation of Chongqing (No. cstc2013jjB80008), the Fundamental Research Funds for the Central Universities (No. XDJK2016C156), the Start-up Research Grant from Qinzhou University (No. 2017KYQD107), and the Research Funds Guangxi Key Laboratory of Beibu Gulf Marine Biodiversity Conservation (No. 2018ZB03).
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