Asian Journal of Bio Science

T. Ramesh Kumar ¹, D. Merin Emerald ¹, Selvisabhanayakam ¹

Affiliations
1 Department of Zoology, Annamalai University, Annamalainagar (T.N.), IN

Abstract

The female reproductive system of the adult female Odontopus varicornis is composed of two ovaries, each consists of five telotrophic type of ovarioles. The ovary during fully mature turn into yellow in colour due to heavy accumulation of yolk spheres in the terminal oocytes. Telotrophic ovarioles contain a single usually huge cluster of germ cells. The cluster consists of several oocytes that are linked to a common, ovarioles located, trophic compartment, usually including numerous trophocytes. The ovary showed some remarkable changes in the insects treated with sublethal concentration of mercury (25 ppm for 48 h). In treated insects the Tunica propria and other epithelial sheath of the terminal filament exhibited disintegration of oogonial cells, nutritive cord, trophocytes and cytoplasmic vacuolization.

Keywords

Odontopus varicornis, Oogonial Cells, Nutritive Cord, Trophocytes.

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S. Milton Prabu ¹, J. Renugadevi ¹, T. Ramesh Kumar ¹

Affiliations
1 Department of Zoology, Annamalai University, Annamalainagar (T.N.), IN

Abstract

Heavy metal pollutants are generally discharged in the aquatic environment as a result of industrial processes and are causing major problems in the food chain. Pollution due to heavy metals is of serious concern and among them cadmium deserves special attention. Cadmium, a heavy metal has been recognized as one of the most toxic environmental and industrial pollutant due to the ability to induce severe alterations in various organs following either acute or chronic exposure. The present study was carried out to evaluate the protective influence of selenium against cadmium induced biochemical alterations in lipid peroxidation (LPO), reduced glutathione (GSH), glutathione peroxidase (GPx), total sulfhydryl group (TSH) and total protein in gill, liver, kidney and muscle tissues of Cirrhinus mrigala fingerlings for 30 days. A significant increase in the level of lipid peroxidation and concominant decrease in the activity of GSH, GPx, TSH and total protein levels were observed in all the tissues of cadmium (0.85 mg/l) treated group. Administration of cadmium along with the equimolar dose of selenium (0.34 mg/l), the above mentioned biochemical parameters were reverted near to their normal levels that showed the protective effect of selenium against cadmium induced toxicity.

Keywords

Cadmium, Fish, Selenium, Enzymes, Metabolism.

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