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Toxicity Induced Historical Changes In Gills Of Oreochromis Sp. by Exposed To Clove Oil

Histopathological changes in gills of Oreochromis sp. exposed for 96 hr with three different concentrations of clove oil, 48 mg/L, 65 mg/L and 81 mg/L were examined in this study. These concentrations were selected by 25% lower and 25% higher than LC50 value (65 mg/L). The gills were fixed in 10% FAA (formalin acetic acid) for histological observation. Severe lesions such as lamella fusion, telangiectasis and oedema were observed at 48 mg/L. At the concentration of 65 mg/L the gills exhibited the occurrence of oedema and necrosis whereas at 81 mg/L, lifting of lamella epithelium and necrosis were noticeable.


Marina Hassan

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