Mercury in wild animals and fish and health risk for indigenous Amazonians
Débora Francielly de Oliveira, Bruno Soares de Castro, Maria Cristina Nery do Nascimento Recktenvald, Walkimar Aleixo da Costa Júnior, Fábio Ximenes da Silva, Cristiano Lucas de Menezes Alves, Josiel Dimas Froehlich, Wanderley Rodrigues Bastos, Ari Miguel Teixeira Ott
Abstract
Total mercury (T-Hg) was determined in fish and wild animal meat consumed in indigenous villages in the Brazilian Amazon region, where there is no history of gold mining. The analyses were performed in an atomic absorption spectrophotometer by generation of cold vapour. Regardless of the dietary habit, 42.0% of the fish had levels of T-Hg higher than the values considered as safe for human health by the World Health Organisation. Exposure to mercury in the villages was higher due to the consumption of fish compared to the consumption of meat of wild animals. Carnivorous species showed a higher concentration of T-Hg, both in fish and in wild animals. It is preferred to consume meat from fish and non-predatory wild animals, which can reduce the risk of diseases resulting from high concentrations of mercury in the body of the studied indigenous people.