Autor(es): Pignati, Marina Te?filo ; Pezzuti, Juarez Carlos Brito ; Souza, Larissa Costa de ; Lima, Marcelo de Oliveira ; Pignati, Wanderlei Antonio ; Mendes, Rosivaldo de Alc?ntara
Data: 2018
Origem: Oasisbr
Assunto(s): Merc?rio / toxicidade; Intoxica??o por Merc?rio / microbiologia; Polui??o de Rios / an?lise; Hepat?citos / an?lise; Monitoramento Ambiental; Tartarugas / metabolismo; Regi?o Norte (BR); Rio Xingu (PA); Bacia do Rio Xingu
This research was funded by the CAPES [Foundation for the Improvement of Personnel in Higher Education] ?Governance, Management and Conflicts and the Handling of Natural Resources in the Amazon Region?
Universidade Federal do Par?. Programa de P?s-gradua??o em Zoologia. Bel?m, PA, Brazil / Museu Paraense Em?lio Goeldi. CZO. Bel?m, PA, Brazil.
Universidade Federal do Par?. N?cleo de Altos Estudos Amaz?nicos. Bel?m, PA, Brazil.
Minist?rio da Sa?de. Secretaria de Vigil?ncia em Sa?de. Instituto Evandro Chagas. Laborat?rio de Toxicologia. Ananindeua, PA, Brasil.
Minist?rio da Sa?de. Secretaria de Vigil?ncia em Sa?de. Instituto Evandro Chagas. Laborat?rio de Toxicologia. Ananindeua, PA, Brasil.
Universidade Federal de Mato Grosso. Instituto de Sa?de Coletiva. Cuiab?, MT, Brazil.
Minist?rio da Sa?de. Secretaria de Vigil?ncia em Sa?de. Instituto Evandro Chagas. Laborat?rio de Toxicologia. Ananindeua, PA, Brasil.
Abstract: Many studies on mercury contamination in aquatic biota deal with the effect of consuming metal-contaminated organisms on human health. In this study, we examined the factors that cause mercury contamination in Podocnemis unifilis in the Xingu River Basin of Mato Grosso and Par? States, Brazil. We quantified by atomic absorption spectroscopy with cold vapor the total mercury (THg) content in the liver and muscle samples of 50 Podocnemis unifilis specimens collected from the basin. The liver and muscle samples contained 134.20 ? 119.30 ng g?1 THg and 24.86 ? 26.36 ng g?1 THg, respectively. Each chelonian or meal has, on average, 5.34? more Hg than the highest level established as acceptable. From the results it can be inferred that, given the weekly consumption of chelonians, the riverine and indigenous communities in the Xingu River Basin are at risk of chronic consumption of Hg in amounts beyond the acceptable limit. The potential high risk to the health of this population is evident; however, the risk classification needs to be further studied
