BODY COMPOSITION AND CALORIFIC VALUE OF A TELEOSTEAN FISH Glossogobius gutum (HAMILTON,1822) IN YAMUNA RIVER AT MAKHDUMPUR, JEHANABAD, INDIA

The present study deals with variation in body composition of a teleostean fish ,Glossogobius gutum (Ham.) in relation to body length , weight and season .The body composition of fish in terms of moisture, Proteins, lipids , carbohydrates and ash content were observed 80.16 %, 15.55%, 1.15%, 0.89% and 2.26% respectively. The moisture content showed inverse relationship with body size and body weight which were varied from 75.40 to 84.66% in large ( standard length 16.0 cm & weight 46.0 ± 0.280 g) and small size fishes ( Standard length 6.0 cm & weight 4.0 ± 830 g) respectively . The other body components of the fish also showed variation such as Proteins 12.20 to 18.80% , lipids 0.60 to 1.90% , carbohydrates 0.70 to1.10% and ash content 1.83 to 2.80% from small size ( Standard length 6.0 cm & weight 4.0 ± 830 g) to large size fishes ( standard length 16.0 cm & weight 46.0 ± 0.280 g) respectively .The calorific values showed slight variation with respect to season which was maximum in winter (4 Kcal/g ) and minimum during monsoon (3.6 Kcal/g). The sulphur containing amino acids cysteine and methionine were found in bound form in liver and whereas methionine and basic amino acid histidine were present in bound form in muscles .