Seasonal variation in the energy metabolism in an estuarine crab, Chasmagnathus granulata (Dana, 1851)

1. 1. The effects of seasonal variation on the carbohydrate and lipid metabolism of the Chasmagnathus granulata were investigated. 2. 2. Glycemia is high in winter and summer and low in spring and fall. 3. 3. The glycogen content in the hepatopancreas and muscle is higher in fall and winter, and decreases during spring and summer. 4. 4. The muscle lipids are higher in summer, and decrease during fall and winter whereas hepatopancreas lipids are higher except in the fall. 5. 5. The crabs show change in the metabolic pattern of lipids and carbohydrates during the seasons of the year.