Effects of dietary inactive yeast cell wall on growth performance, survival rate, and immune parameters in pacificwhite shrimp (Litopenaeus vannamei) was investigated. Three dosages of inactive yeast cell wall (0, 1, and 2 g kg-1) weretested in three replicate groups of juvenile shrimps with an average initial weight of 7.15±0.05 g for four weeks. There wasno significant difference in final weight, survival rate, specific growth rate, feed conversion ratio, feed intake, proteinefficiency ratio, and apparent net protein utilization of each treatments. However, different levels of inactive yeast cell wallshowed an effect on certain immune parameters (p<0.05). Total hemocyte counts, granular hemocyte count, and bacterialclearance were better in shrimp fed diets supplemented with 1 and 2 g kg-1 inactive yeast cell wall as compared with thecontrol group.
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