Dietary Copper Requirement of Penaeus vannamei.

摘要: The dietary copper requirement of Penaeus vannamei juveniles was investigated using casein/ gelatin based semi-purified diets under controlled laboratory conditions. Twenty-day-old P. postlarvae were fed the basal diet lacking supplementation but containing 2.0mg Cu/kg for a 10-day period to reduce tissue stores copper. After conditioning, six replicate groups juvenile shrimp (mean weight 0.057g) each graded levels supplemental (0, 4, 8, 16, 32, 64, or 128mg diet) duration 42-day feeding trial. Weight gain (percent gain) ranged from 2.88g (5, 064%) without (2mg total 3.5g (6, 177%) supplemented with 64mg Cu/kg. increased in response up 32mg diet, indicating no more than 34mg diet. In addition depressed growth, copper-deficient had enlarged hearts and hemolymph, carapace, hepatopancreas. There clear indication that adversely affected growth survival.