Hematological parameters in Nile Tilápia, Oreochromis niloticus exposed to sub-letal concentrations of mercury

Autor(es)

Nilton Massuo Ishikawa ^[1] ; Maria José Tavares Ranzani-Paiva ^[2] ; Julio Vicente Lombardi ^[3] ; Cláudia Maris Ferreira ^[4]

Afiliação do(s) autor(es)

^[1] UNESP. Centro de Aqüicultura

^[2] Instituto de Pesca SAA-APTA. Instituto de Pesca SAA-APTA - Brasil

^[3] Instituto de Pesca SAA-APTA. Instituto de Pesca SAA-APTA - Brasil

^[4] Instituto de Pesca SAA-APTA. Instituto de Pesca SAA-APTA - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Archives of Biology and Technology; v. 50, n. 4, p. 619-626, 2007-07-00.

Resumo

Mercury toxicity in tilapia, Oreochromis niloticus, (Linnaeus, 1758) was investigated by the hematological parameters after long-term (14 days) exposure to various Hg concentrations (0.02, 0.002, 0.0002mg/L Hg). Test groups were set up with three replicates for each concentration, plus the control group. Blood samples were collected from six individuals for each concentration at 0, 3, 7, 10 and 14 days of exposure. The hematological parameters analyzed were: total red blood cell count (RBC), hemoglobin concentration (Hb), hematocrit (Ht), mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), mean corpuscular hemoglobin concentration (MCHC), total white blood cell count (WBC) and differential leukocyte counts and total thrombocyte count (Tr). There were no significant differences among the mean hematological values at the different Hg concentrations indicating that Hg at the concentrations studied was not toxic to tilapia. (AU)

• Processo FAPESP: 04/01236-9 - Efeitos da contaminacao alimentar por metilmercurio em peixes (oreochromis niloticus) e sua consequente contaminacao em mamiferos (ratos wistar).
• Beneficiário: Maria José Tavares Ranzani de Paiva
• Modalidade de apoio: Auxílio à Pesquisa - Regular