Beneficial effects of dietary supplemented Parachlorella kessleri strain KNK-A001 on pacific white shrimp (Litopenaeus vannamei) and kuruma shrimp (Marsupenaeus japonicus)

Abstract

We studied about supplemental effects of a dry powdered microalga Parachlorella kessleri (KNK-A001) for two shrimp species. As a result it was found that dietary supplementation of 0.005% KNK-A001 showed a tendency to improve growth performance of pacific white shrimp (Litopenaeus vannamei). Furthermore, kuruma shrimp (Marsupenaeus japonicus) fed diet containing 0.05% KNK-A001 showed significantly higher survival rate than control without KNK-A001 in WSSV challenge trial. Increased hemocyte cell density was observed in the hemolymph obtained from the shrimp fed 0.05% KNK-A001, and superoxide anion producing activity of the hemocytes was also increased as compared to the control. These results suggested that KNK-A001 had the beneficial effects on shrimp species.