Reduction of the Feeding Levels on Litopenaeus Vannamei Nursery Under Bioflock Conditions Using A Bioreactor System

Abstract

The aim of this research was to evaluate whether the feeding levels in Litopenaeus vannamei nursery can be reduced without any adverse of the shrimp growth under bioflock conditions using a bioreactor system. There were 5 different reduced feeding levels as treatments in triplicates in this study ie. 10% reduction of the feeding level (A), 15% reduction of the feeding level (B), 20% reduction of the feeding level (C), 25% reduction of the feeding level (D), and no reduction of the feeding level (E; as control). Average daily gain (ADG), survival rate and water quality parameters were observed in the study. Results of the study showed that there were no significant differences (P>0.05) in ADG and survival rates among all treatments with ranges of 0.11-0.19 g/day and 74-79%, respectively. It means that under bioflock conditions using a bioreactor system the feeding levels in the L. vannamei nursery can be reduced up to 25% without any adverse in the growth performance. However, 20% feeding level reduction is recommended to give a better growth performance of L. vannamei in nursery system with biofloc.