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Objective To analyze the content characteristics of copper (Cu), zinc (Zn), mercury (Hg), lead (Pb), cadmium (Cd) and arsenic (As) in the dorsal and abdominal muscles of wild and farmed Larimichthys crocea, and carry out the food health threat and risk assessment. Methods The content of 6 kinds of heavy metals were determined by inductively coupled plasma mass spectrometry and atomic fluorescence spectrometry in the dorsal and abdominal parts of wild [(35.16±4.62) cm in length and (510.68±33.74) g in weight] and farmed [(32.90±1.11) cm in length and (454.19±20.03) g in weight] Larimichthys crocea. The pollution index method and health risk assessment were used for analysis. Results The average content of Hg, As, Cu and Zn in the dorsal and abdominal of wild and farmed Larimichthys crocea were 0.128, 0.032, 4.179 and 5.526 mg/kg, and 0.023, 0.195, 4.106 and 5.389 mg/kg, respectively. Pb and Cd were not detected. Based on the single heavy metal pollution index, Cu, Zn, Pb, Cd in the dorsal and abdominal of wild and farmed Larimichthys crocea and Hg in the dorsal and abdominal of farmed Larimichthys crocea were pollution-free levels. There was slight pollution of Hg and As in the abdomen part of wild Larimichthys crocea, and mild pollution of Hg in the dorsal of wild Larimichthys crocea. Serious pollution level of As was found in the dorsal and abdominal of the farmed Larimichthys crocea. The comprehensive pollution index value of 6 kinds of heavy metals in the muscle of wild Larimichthys crocea was less than 1, which were pollution-free. And comprehensive pollution index value in the muscle tissue of farmed Larimichthys crocea was between 1.0<PI≤2.0, which were mildly polluted. Conclusion The content of heavy metals in the dorsal and abdominal muscles of wild Larimichthy crocea don’t exceed the detection standard, and the As element in the dorsal and abdominal muscles of farmed Larimichthys crocea exceeds the standard. There is no obvious health risk for the wild and farmed Larimichthys crocea muscles. This study systematically reveals the problem of As enrichment in farmed Larimichthys crocea, and early warning of feed or environmental risks; through the two-dimensional assessment of pollution index and health risk, the safety evaluation model of aquatic products is constructed. The research results have practical guiding significance for improving China’s aquaculture standards and improving the quality and safety supervision level of aquatic products.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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