Analyses of the sediment toxicity of Monjolinho River, São Carlos, São Paulo State, Brazil, using survey, growth and gill morphology of two fish species (Danio rerio and Poecilia reticulata)

Brazilian Archives of Biology and Technology

Aline Fernanda Campagna²  Renata Fracácio¹  Beatriz Kawamura Rodrigues¹  Márcia Noélia Eler¹  Nelsy Fenerich Verani¹  Evaldo Luiz Gaeta Espíndola¹ 

[1] ,USP Faculdade de Zootecnia e Engenharia de Alimentos Pirassununga SP ,Brasil

关键词: Sediment Toxicity;    Danio rerio;    Monjolinho River;    Poecilia reticulata;   

DOI  :  10.1590/S1516-89132008000100023

来源: SciELO

【 摘 要 】

The objective of this work was to evaluate the toxicity of the sediments of the Monjolinho River (São Carlos - São Paulo/Brazil), through partial chronic toxicity bioassays with juveniles of D. rerio and P. reticulata. Histological analyses of the gills and biometric measurements were conducted to detect the possible deleterious effects that caused the death. In all points the sampled the alterations were found in the gills (hyperplasia, fusion of secondary lamellas and dilation of blood vessels), with the most intense lesions (second stage) occurring at the point two. The biometric analysis pointed to inadequate conditions for the growth of the test-organisms when exposed to the sediment samples. These results showed that the conditions of these environments were not suitable for the survival and growth of these fishes.

【 授权许可】

CC BY-NC   
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