Relationship between energy allocation and reproductive strategy in Trisopterus luscus

► Water content and energy are inversely related in tissues of Trisopterus luscus. ► Energy reserves in T. luscus females are mainly associated to lipids in liver. ► HSI has been detected as the best index to analyze nutritional status in pouting. ► Seasonality of energy reserves was clearly detected closely linked to sexual cycle. ► Fuel for reproduction comes essentially from stored energy.