Selenite and Selenate Effects on Mercury (Hg2+) Uptake and Distribution in Tilapia, Oreochromis niloticus L., Assessed by Chronic Bioassay

Autor(es)

Carvalho, G. G. A. ^{[1, 2]} ; de Franca, J. G. ^[3] ; Dias, D. C. ^[3] ; Lombardi, J. V. ^[4] ; de Paiva, M. J. R. ^[4] ; Carvalho, S. ^[3] ; Sarries, G. A. ^[5] ; Ferreira, J. R. ^{[4, 1]}

Afiliação do(s) autor(es)

^[1] Nucl Energy Ctr Agr, Analyt Chem Lab, BR-13400970 Piracicaba, SP - Brazil

^[2] Univ Metodista Piracicaba, Fac Hlth Sci, BR-13400911 Piracicaba, SP - Brazil

^[3] UNESP, Aquaculture Ctr, BR-14884900 Jaboticabal, SP - Brazil

^[4] Fishery Inst APTA SAA SP, BR-05001900 Sao Paulo - Brazil

^[5] ESALQ USP, Dept Math & Stat, BR-13418900 Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Bulletin of Environmental Contamination and Toxicology; v. 82, n. 3, p. 300-304, MAR 2009.
• Citações Web of Science: 10

Resumo

Aquatic organisms are considered excellent biomarkers of mercury (Hg) occurrence in the environment. Selenium (Se) acts in antagonism to this metal, stimulating its elimination, and reducing its toxicity. In this paper, tilapia (Oreochromis niloticus) were chronically acclimated in sub-lethal Hg(2+), Hg(2+) + Se(4+) and Hg(2+) + Se(6+) concentrations. Distribution and bioaccumulation of both elements were evaluated in fish tissues. The kidney was the main target of the Hg and Se uptake, and the presence of Hg induced the Se hepatic elimination. The Hg bioaccumulation in the gill, spleen and heart were higher in the presence of Se(6+) than in the presence of Se(4+). (AU)

• Processo FAPESP: 00/14460-3 - Considerações biogeoquímicas e ecotoxicológicas relativas ao Hg e ao Se, presentes nas represas de Barra Bonita e Bariri, São Paulo, SP
• Beneficiário: José Roberto Ferreira
• Modalidade de apoio: Auxílio à Pesquisa - Regular