อิทธิพลของความเค็มและระดับของโปรตีนต่อการจัดสรรพลังงานของกุ้งกุลาดำ Penaeus monodon ในระยะวัยรุ่น / พิพัฒน์ เวฬุคามกุล = Effect of salinity and protein levels on energy budget of juvenile black tiger shrimp Penaeus monodon / Pipat Warukamkul
Effects of salinity and dietary protein on energy budget of juvenile Penaeus monodon (0.6 - 0.7 g ; 4.0 - 5.5 cm) using artificial diets were studied using 3x3 factorial design with 3 levels of salinity (10, 20 and 30 ppt) and 3 levels of dietary protein (25, 35 and 45%). Experiments were done in triplicates. Prior to the experiments, prawns were acclimatized for a month to the experimental conditions. No interaction between salinity and dietary protein was found. All 3 levels of salinity affected molting loss differently (P<0.05). Molting loss was highest at 10 ppt and decrease as salinity increased. No effect of salinity on survival rate energy of consumption, growth, ammonia excretion, respiration and fecal loss. Effect of dietary protein on growth was found (P<0.05) : the higher the dietary protein, the higher the energy for growth. No effects of dietary protein were found on energy of feed consumption, respiration, ammonia excretion, fecal loss and molting loss. Energy budget of juvenile in the suitable conditions (20 ppt with 35 ppt protein in the diet) could be explained as using energy for growth 15.39%, respiration 14.88%, ammonia excretion 0.98%, fecal loss 56.42%, molting loss 0.65% with 11.68% of energy was lost during feeding. เท the low and high salinity (10 and 30 ppt) while receiving the same level of protein in the diet, juvenile prawn will lose more energy in ammonia excretion, respiration and fecal loss with less energy available for growth.
