Alterações morfológicas de Tilápias do Nilo (Oreochromis niloticus) (Linnaeus, 1758) expostas às águas da represa Billings. / Morphologic alterations of Nile Tilapia (Oreochromis niloticus) (Linnaeus, 1758) exposed to waters of Billings dam.


IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia




The Billings dam shows eutrophic waters due to the large amount of sewage from urban occupation neaby, and consequently, the fish can be a public health problem. The gills and liver become target organs for the action of pollutants in the aquatic environment and may present several levels of biological organization. These biological responses to stress caused by pollutants can be used to identify early signs of damage to fish and can be called biomarkers. Thus, this project aimed to analyze the histological gills and liver of Nile Tilapia, by means of measurements, Histological Alterations Index and Assessment Medium Value; the frequency of micronuclei was done. We observed histological alterations in gills and livers of Nile Tilapia classified as mild to severe, and the presence of micronucleus. The results enable better environmental monitoring and quality control of this species.


biomarcadores biomarkers cell structure chromosomes cromossomos estrutura celular freshwater fish histological techniques nile tilapia peixes de água doce técnicas histológicas tilápia do nilo

Documentos Relacionados