Gills of juvenile fish piaractus mesopotamicus as histological biomarkers for experimental sub-lethal contamination with the Organophosphorus Azodrin®400

Brazilian Archives of Biology and Technology

Cácia Aparecida Mendes Rudnicki²  Gisele Cristiane Melo²  Lucélia Donatti¹  Helena Gonçalves Kawall¹  Edith Fanta¹ 

[1] ,Universidade Federal do ParanáCuritiba PR ,Brasil

关键词: Freshwater Fish;    Organophosphorus;    Monocrotophos;    Morphology;    Branchiae;   

DOI  :  10.1590/S1516-89132009000600015

来源: SciELO

【 摘 要 】

Piaractus mesopotamicus is a freshwater native fish from rivers of the Paraná-Paraguay Basin and of the Pantanal region and has been used for repopulation programs in Brazil. Juvenile fishes were exposed to the sub-lethal dose of 1.08mg/L of the OP Azodrin®400 containing 0.43µL/L of the active principle monocrotophos for 96 h. A frequent pathology in the gills at all times of exposure was epithelial detachment, from minimal until 24 h of exposure, to intense after 48 h of contamination. Deformed pillar cells in the respiratory lamellae leading to irregular blood spaces and blood congestion, as well as hyperplasia and lamellar fusion were observed. These histopathologies suggested that 48 h after T0 was an important time when a reduction in the capability for gaseous exchange with consequent weakening of the fishes' condition could occur. This could impair growth and development of juveniles introduced in water bodies for repopulation programs.

【 授权许可】

CC BY-NC   
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