eng Ansari Education and Research Society Journal of Ultra Scientist of Physical Sciences October, 2017 29 10 292 294 http://dx.doi.org/10.22147/jusps-B/291006 860 article ALKA SINGH 1 RANU SHARMA 2 JAWED AHMED KHAN 3 Research Scholar , House no. 94, Pushpakunj Mau Road, Khandari, Agra (India) Asstt. Prof., Deptt. of Zoology, MJRP University, Jaipur (Rajasthan), (India) Professor and Head, Deptt. of Zoology, Saifia Science College, Bhopal (M.P.) (India) <p style="text-align: justify;">The present paper deals with the study of amino acids and lipid concentration in the immature and mature oocyte in the fish Heteropneustes fossilis .It was observed that the essential amino acids under the influence of gonadotrophins play a vital role in the gonadal maturation as well as in the synthesis of various enzymes needed for steroidogenesis. In the present study, the rate of incorporation of amino acids and their transformation in gonads indicate their vital role in the maturation of gonads. In addition to amino acids, the lipid fraction especially the ester cholesterol and the phospholipid were also found to play a significant role during the sequential changes which occur during maturation process of the gonads of Heteropneustes fossilis.</p> https://ultraphysicalsciences.org/paper/860/ amino acids Heteropneustes fossilis steroidogenesis fish