Vol. 2, Issue 6 (2017)
Histopathological changes in the eyes, gills and muscles of Indian major carp Catla catla (Hamilton, 1822) exposed to Cadmium nanoparticles
Author(s): S Sangeetha, S Deeparani
Abstract: Heavy metals are essential for aquatic animals in lower concentration. However, at high concentration levels, they accumulate in different organs, damage tissues and interfere with the normal growth and proliferation. More than one hundred million people are at high risk of elevated cadmium exposure, mainly via drinking water, as well as by the air born metalloid in the areas with coal burning and industrial emissions. Consumption of the cadmium through contaminated fishes collected from the polluted waters might also contribute to bioaccumulation of cadmium in human beings. In the present study the toxicity of Cadmium nanoparticle exposure was experimented in Indian major carp, Catla catla. The LC50 value was assessed as 20ppm/kg of body weight. The histological changes in the eyes, gills and muscles were studied. The eye tissues showed disorganization of corneal cuticle and formation of corneal cones and constriction of internal and external medulla and complete disorganization of basement. The changes observed in the gill of Catla catla were swelling, fusion of lamellae, severe erosions of epithelial layer and high mucus secretion. While muscle tissues showed marked thickening and separation of muscle bundles, haemolysis, necrosis, lesions with reduced compactness and pronounced intramuscular oedema with minor dystrophic changes.