稚オニテナガエビの成長，生残，および体組成に及ぼす片眼病除去と給餌回数の影響

A feeding trial was conducted to examine the effects of unilateral eyestalk ablation (UEA) and feeding frequencies on the growth, survival, and chemical compositions of whole body for the juvenile freshwater prawn Macrobrachium rosenbergii (0.1g mean initial wet weight) fed on a carb protein-based diet. The results demonstrated that UEA promotes the growth and the ablated prawns are able to reach commercial size (30g) 40 days earlier than intact ones. Although feeding frequencies did not affect the growth and survival of juvenile prawns significantly, ablated prawns fed twice a day produced the best results. In intact groups, feeding once a day was good enough to sustain optimal growth in the present study. Neither UEA nor feeding frequency affected the con-tents of protein, lipid, or the compositions of lipid class and fatty acid of prawn whole body. Major neutral and polar lipids were triglyceride and phosphatidylcholine, respectively, and high levels of 16:0, 18:1 and 18:2n-6 were found in whole body of both ablated and intact prawns.