Abstract

EXPOSURE OF SILVER NANOPARTICLES IN GLYCOGEN CONTENT TO FRESHWATER FISH “CYPRINUS CARPIO”

*Dr. Y. Thangam, P. Ranganayaki and Dr. M. Rabeeth

Abstract

Background: The term nano-silver refers to the nanoparticulate size of the silver nanoparticles particles. Silver to 100μm breaks to silver nanoparticles. Silver nanoparticles in the aquatic environment is estimated to about 0.01 μgL-1. Nanosilver has a more active surface area and better porosity than commercial silver. Traditional methods in toxicology research and assessments have focused mostly on biochemical agents in glycogen level. Widely used nanoparticles, such as silver nanoparticles, most likely enter the ecosystem and may produce a biochemical and physiological response in many animals, possibly altering their fitness and might ultimately change the glycogen level. Silver nanoparticles used as biomarkers for monitoring environmental quality, water pollution and the health condition of aquatic organisms. Objective: The change leads to toxicity in biochemical level and changes occurs in glycogen content. Blood hepatic glycogen can be utilized as a parameter of stress response, as it is rapid, practicable and quantitative reported that blood glycogen appeared to be sensitive indicator of environmental stress in fish and it has been widely monitored to study stress in fish. Material & Methods: Estimation of muscle glycogen was done by anthrone method (samseifter et al., 1949). Results: Silver nanoparticles in glycogen content exhibited a significant decrease throughout the study period. Conclusion: The action of silver nanoparticles is most likely on the gill surfaces resulting in impaired gas exchange. Nanosilver concentrations and the expected future use of nanosilver undoubtedly result in decreased environmental concentrations. Also the examined concentration of silver nanoparticles in the present study is low when exposed to fish Cyprinus carpio in the environment. The decrease in glycogen content due to silver nanoparticles exposure in fish might be due to an enzyme metabolite named plasmatic pyruvate. Decreased of glycogen level in fish Cyprinus carpio exposed to silver nanoparticles may also be due to the absence of metabolite in liver.

Keywords: Silver nanoparticles, Cyprinus carpio, glycogen content.