Trace elements accumulation and health risk assessment of Chinese mitten crab (Eriocheir sinensis) from monoculture and rice-crab co-culture mode

Tang, Shi-Zhan; Song, Dan; Bai, Shu-Yan; Huang, Xiao-Li; Chen, Zhong-Xiang; Wang, Peng; Qin, Dong-Li

doi:10.1016/j.jfca.2023.105640

Cited by 3 publications

(2 citation statements)

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“…When As concentration in water is low, crabs are often the dominant species for As accumulation [ 26 ]; however, when the As concentration in water is high, crabs can rapidly accumulate large amounts of As, leading to significant acute As toxic effects. Previous studies have also shown that As is the most harmful heavy metal in crabs [ 8 , 16 , 27 ].…”

Section: Resultsmentioning

confidence: 99%

“…Total As analysis was carried out as follows: 0.2 g of each sample was accurately weighed on an analytical balance and digested with 2.5 mL of 65% nitric acid, 0.5 mL of 37% hydrochloric acid, and 7.0 mL of ultrapure water. Microwave digestion steps were followed Tang et al (2023) [16]. After digestion, the solution was transferred to a 50 mL volumetric flask, and 0.5 mL of internal standard solution (100 µg/L) was added to a fixed volume of 50 mL.…”

Section: Arsenic Speciation Analysismentioning

confidence: 99%

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Toxic Effects of Arsenic on Four Freshwater Aquatic Species and Its Transformation Metabolism in Crucian Carp (Carassius auratus)

Tang,

Gao,

Qin

et al. 2024

Toxics

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Inorganic arsenic is a well-known carcinogen that is much more toxic than its organic counterpart. While much is known about the accumulation and transformation of arsenic in marine organisms, little is known regarding these processes in freshwater aquatic species. In this study, the acute toxicity and toxicological effects of inorganic arsenic on four freshwater organisms (Cyprinus carpio, Misgurnus anguillicaudatus, Pseudorasbora parva, Eriocheir sinensis) commonly found in rice-fish farming systems were investigated. The organisms exhibited different levels of sensitivity to inorganic arsenic, with crustaceans being more sensitive than fish. Fish were found to be more tolerant to As(V) than As(III). The study also investigated the accumulation, transformation, and release of inorganic arsenic in crucian carp, an omnivorous species with high environmental tolerance. The fish accumulated As(III) rapidly in various tissues, and were able to transport it to other tissues through gills, intestines, and skin. The accumulated As(III) was converted into less toxic forms, such as monomethylarsonic acid (MMA) and dimethylarsinic acid (DMA), via methylation. The fish also converted As(III) into arsenate (AsV) via enzymatic and oxidative reactions. After the transferal to clean water, the forms of arsenic in the various tissues decreased rapidly, but the rates of excretion of the four forms of arsenic were not the same among the different tissues. Our results suggest that crucian carp can reduce the environmental toxicity of As(III) at certain concentrations by transforming it into less toxic forms within their bodies.

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