Histopathological changes in the gill, liver and kidney of pacu (Piaractus mesopotamicus, Holmberg, 1887) exposed to various concentrations of trichlorfon

Histopathological effects of Cyperdicot and vitamin E supplementation on selected organs of Clarias gariepinus (Burchell, 1822) reared in a tropical fish farm in Nigeria

“…These vacuolar degenerating of glomerular tuft, shrinkage of some glomeruli and dilatation of others, increased Bowman's capsule space, cloudy swelling of some epithelial tubules and dilatation of tubules lumens and obstruction observed are in agreement with the changes in the kidney of freshwater fish (Piaractus mesopotamicus) exposed to organophosphate insecticide (Mataqueiro et al, 2009). The shrinkage in renal corpuscles clearly indicated that treated fish adopt some other routes of nitrogen excretion while the dilation of the renal corpuscles may be due to an increase in the filtration rate and consequently in urine volume, which may be a mechanism used by fish to overcome the toxic effect of the pesticide (Roy and Bhattacharya, 2006).…”

Respiratory toxicity of cyanobacterial aphantoxins from Aphanizomenon flos-aquae DC-1 in the zebrafish gill

“…However, these alterations may also impact gas exchange and decrease O 2 absorption, thereby inhibiting the processes of oxidative metabolism . Therefore, the results of the present study in combination with previous research suggest that the structural alterations in the gills of zebrafish exposed to aphantoxins may represent an important protective mechanism against toxicantinduced injury (Mataqueiro et al, 2009). …”

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

“…The species chosen is a native teleost fish of the Parana-Paraguay Basin, and is of importance in Brazil for human consumption, angling and aquaculture. The pacu has proven to be a good bioindicator of water quality, being seriously affected by compounds such as organophosphates (Mataqueiro et al 2009).…”