Lateral Distribution And Belly Flap & Fillet Chemical Composition Of Dogfish (Squalus Acanfhias L.)

Abstract

The chemical composition of lateral distribution and belly flap and fillet of dogfish was determined for a number of fsh between April 1991 and May 1993. The chemical con]- position of fish largely influenced by species, sex stage of maturation, season of capture, size, and the feeding habits of the fish. Three other factors which also affect the chcmical ccmposition are method of sample preparation (i.e. which part of the fish is taken, and the homogeneity of the sample), the method of analysis, and the freshness of fish. The mean values for proximate composition of front, middle and rear part of dogfish (in dwb) were 83.8 %, 84.1, 100 % crude protein, 31.87 %, 32.27 %, 18.19 % lipid, and 4.20 %, 4.31 %, 4.94 %ash for the male, while the female contain 81.6 %, 77.4 %, 88.8 % crude protein, 37.67 %, 45.44 %, 29.2 % lipid, and 4.38 %, 3.78 %, 4.07 %, respectively. It was found that the female dogfish had a higher lipid content and a lower moisture content than the male fish. The lipid content of all the fish decreased towards the tail and water content increased. The protein content of the fillet was 'higher than that of the beUy flap, the latter having a higher lipid content.