ORIENTAL JOURNAL OF CHEMISTRY www.orientjchem.org An International Open Access, Peer Reviewed Research Journal ISSN: 0970-020 X CODEN: OJCHEG 2019, Vol. 35, No.(3): Pg. 1220-1226 This is an Open Access article licensed under a Creative Commons license: Attribution 4.0 International (CC- BY). Published by Oriental Scientific Publishing Company © 2018 The Effect of Ultraviolet Light Exposure on Proximate Composition, Amino Acid, Fatty Acid and Micronutrients of Cold Water Fish, “Barilius vagra” VIVEK SHARMA 1 *, ABHISHEK SRIVASTAVA 1 and VINOD KUMAR VASHISTHA 1 1 Department of Chemistry, G. L. A. University, Mathura, Uttar Pradesh-281406, India. *Corresponding author E-mail: vivek.sharma@gla.ac.in http://dx.doi.org/10.13005/ojc/350344 (Received: May 17, 2019; Accepted: June 17, 2019) ABSTRACT Barilius vagrahas reached a position of importance in the hierarchy of class because of high abundance of protein and minerals. The effect of ultraviolet radiations on minerals, amino acid and fat content in fish, Barilius vagra was investigated at different time intervals (1 h, 11 h, and 21 h). It was observed that UV radiations have no significant effect on composition of minerals, but total crude fat, crude protein and nitrogen content decreases significantly with increase in exposure time of UV radiation. The decrease in percentage of crude fat, crude protein, and nitrogen, after 21 h of irradiation was found to be 3.621, 8.22 and 3.568 respectively. Also the amino acid content in fish scale observed to decrease on exposure to UV light and the maximum decrease was observed in Valine after 21 h of ultraviolet exposure. The exposure to UV light shows a reduction in the weight of powdered scale. Therefore, assimilation of a small quantity of small fishes can considerably enhance the biological value of the diet and subsidize to momentous advances in nutritional security. Keywords: Ultraviolet Irradiation, Crude protein, Amino acid, Crude fat, Barilius vagrahas. INTRODUCTION Fishes are considered as a significant cradle of animal protein and other minerals needed for growth of healthy body 21 . Fishes also comprise a significant amount of unsaturated fat, vitamins, and other essential nutrients. Amongst, all animal protein white-fleshed fish contain lower fat content. Oily fishes contain high amount of unsaturated fat (omega-3 fatty acids) and less amount of saturated fat (omega-6 fatty acids) in comparison to red meat 4 .In India, there are about 2246 indigenous fish species have been reported, out of which 765 are fresh water including 450 as small indigenous fish (SIFs). In general, the fish having a length of 5 to 25 cm are considered as SIFs 5,15 . The SIFs encompass an important class of total finfish and shellfish population and subsidize considerably to the nutritious as well as means of support for the rural frame. They are appeared to be a rich source of nutrients and micronutrients. The SIFs deliver essential minerals to human nourishment as they are