With increasing population India is facing a very serious problem of food resources. However in India a large number of peoples from different society depend upon non-vegetarian fish diet. Compared to other animals fish possess relatively greater amount of muscular tissues and therefore rich source of nutrition.
In the present study seasonal variation of biochemical composition were evaluated in liver, muscles and ovary of M. seenghala. In liver the glucose content was found to vary considerably from season to season. Highest level of glucose was recorded in the month of January, which gradually reduces. The lowest glucose level was recorded in June and then again increases in the month of December. Muscular tissue constitutes about 40% of the body weight and it is therefore the largest single tissue component of the body, which can suddenly change its metabolism manifold depending on its state of activity. The activity of muscles is major determinant of metabolic requirements of the body and all the circulatory and other adjustment related to this. The occurrence of carbohydrates in the muscles is not constant. The highest amount of glucose in the in the ovary and its lowest level in liver can be rerecorded during the spawning phase. The lowest glucose level in the ovary and its highest level in the liver are noted in the resting /spent phase. Glycogen quantity changes with maturation cycle of the ovary. The lowest quantity of glycogen was observed in stage II and in the following state. Glycogen content reaches to its maximum in stage IV. Highest level of glucose was recorded in ovary in the month of July, which gradually reduces, and lowest recorded in January.