Acute Toxicity by Water Containing Hexavalent or Trivalent Chromium in Native Brazilian Fish, Piaractus mesopotamicus: Anatomopathological Alterations and Mortality

Autor(es)

Castro, Marcello Pardi ^[1] ; de Moraes, Flavio Ruas ^[1] ; Fujimoto, Rodrigo Yudi ^[2] ; da Cruz, Claudinei ^[3] ; de Andrade Belo, Marco Antonio ^[4] ; Engracia de Moraes, Julieta Rodini ^[1]

Afiliação do(s) autor(es)

^[1] Fac Ciencias Agr & Vet UNESP, Dept Patol Vet, BR-14884900 Jaboticabal, SP - Brazil

^[2] Brazilian Agr Res Corp EMBRAPA, Sergipe - Brazil

^[3] Ctr Studies & Res Environm Matol, Jaboticabal - Brazil

^[4] Univ Camilo Castelo Branco, Lab Anim Pharmacol & Toxicol, Descalvado - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Bulletin of Environmental Contamination and Toxicology; v. 92, n. 2, p. 213-219, FEB 2014.
• Citações Web of Science: 19

Resumo

This study evaluated the toxicity of hexavalent and trivalent compounds of chromium to the pacu, Piaractus mesopotamicus, in acute exposures of 96 h through mortality and histopathological responses. Hexavalent potassium dichromate was more toxic than trivalent compounds of chromium chloride, chromium oxide and chromium carbochelate. Sufficient mortalities occurred only with potassium dichromate to yield an LC50 value at 124.2 mg L-1. Hexavalent chromium caused reversible and irreversible lesions, which may affect organ functionality. Histopathological evaluation showed that trivalent chromium caused lesions of lower severity. Pacu subjected to different concentrations of chromium carbochelate showed no histopathological changes in the kidneys, liver, skin and gills, being similar to those of the control fish. Among the three sources of Cr3+, only chromium chloride at 200 mg L-1 resulted in mortality, which reached 100 % within the first 18 h. These findings confirm that trivalent chromium, when administered within recommended levels, may be used safely in aquaculture. (AU)

• Processo FAPESP: 05/57989-8 - Avaliação da resposta inflamatória de Piaractus mesopotamicus, Holmberg 1887 suplementados com diferentes níveis de cromo trivalente na dieta
• Beneficiário: Marcello Pardi de Castro
• Modalidade de apoio: Bolsas no Brasil - Mestrado