Effects of Fasting on Intermediary Metabolism Enzymes in the Liver and Muscle of Rainbow Trout

Fish can go through periods of feed deprivation, either due to natural causes influenced by temperature or management techniques in animal production, affecting their energy metabolism differently, depending on the duration fasting days and water temperature. This study showed effect different before slaughter rainbow trout analyzing intermediary metabolic enzymes muscle liver. For this purpose, a non-fasting group was compared with that fasted for 5, 10, 20 (55, 107, 200 degree (°C d), respectively). A first phase increased activity involved glycolysis observed, increasing hexokinase enzyme pyruvate kinase As progressed, gluconeogenic glycogenolytic pathways liver such as lactate dehydrogenase glycogen phosphorylase regarding no group. After (200 °C lipogenic protein related depletion leading significant changes metabolism. Therefore, prolonged high may compromise supply vital development trout.