To clarify the aspect concerning the accumulation and diminution of fat in various parts accompanying the growth of cultured red sea bream, using fish aged 0, 1, and 2, physique and fat contents in muscle parts, visceral parts, hepatopancreas, dorsal white muscle, and the whole body were measured monthly over a year.According to this survey the following results were confirmed.

As a part of a study on the improvement of flesh texture in cultured red sea bream, we examined whether body density was useful to estimate the body fat content in live fish.A significant negative correlation was seen between body fat content (BF) and body density (BD) for cultured red sea bream aged one and two years as shown below.BD=-0.0018BF+1.0997 (n=97; p<0.001)The deviation of body density from this regression line, the residual value for each fish, was effected by the muscle ratio in the whole body. These results indicate that body density is useful not only to estimate the body fat content but also to surmise the relative level of muscle ratio in live fish.