EFFECT OF NAPTHA CONTAMINATION ON THYRIOD AND CORPUSCLES OF STANNIUS HISTOLOGY OF HETEROPNEUSTES FOSSILIS

Naptha are comprised of normal, ISO cycloparaffins and aromatic hydrocarbon C to C for H. fossilis LC50 4 12 value found to be 23.24 PPM for Naptha and mature fish were exposed for 4 weeks to LD50 value to find out prime changes in Histology of thyroid and corpuscles of stannius. The basic principal of toxicology is that a compound seek entry into the body of an animals, it is corporate into blood and ones it has reached. The circulatory stream through out the body and easily transcend through the plasma membrane the variation of the Thyroid follicles regarding their staining was possible a result of highly effected activity of thyroid but the occurrence of variation all the follicle were effected. Behaviour of thyroidal epithelium was unifor initial stage and appeared as not much district thyroidal follicles started secretion the colloid the development of the vascular at the colloidal mass, the corporates of stannius observed the renal vasculature much filled up with the blood indicating an extra ordinary rise in renal blood supply. The cells were shrunken clumbed loss of staining properties loss of cytoplasmic contents nuclei are more prominent their in early case of female. Naptha toxicity was indicating to be leas effected on male then in female.