plSSN : 0374-8111 | elSSN : 2287-8815
plSSN : 0374-8111 | elSSN : 2287-8815
plSSN : 0374-8111elSSN : 2287-8815
Evaluation of Schizochytrium Meal as a Fish Meal Replacer in the Dietof the Pacific White Shrimp Penaeus vannamei
송상현1†·Saumya Poorni1†·김수혁1·이영미2·조국진2·이경준1,3*
1제주대학교 해양생명과학과, 2CJ 제일제당, 3기당해양과학원 수산생물연구소
In this study, we evaluated the effects of replacing fish meal (FM) with Schizochytrium meal (SCM) on the growth, digestion, immunity and antioxidant capacity of Pacific white shrimp Penaeus vannamei. The basal (Con) diet contained 10% FM. Four experimental diets were formulated by replacing FM in the Con diet with increasing levels of SCM (25%, 50%, 75% and 100%). A total of 500 shrimp (1.90 g) were randomly distributed into 20 tanks (240 L) in quadruplicate groups per dietary treatment and fed the diets six times a day for 4 weeks. Growth performance was maintained up to 50% replacement level, whereas a significant reduction was observed at higher replacement levels (P<0.05). Trypsin activity decreased with the inclusion of SCM (P<0.05), whereas chymotrypsin, lipase and α-amylase activities were not significantly affected by the dietary treatments (P>0.05). Innate immune responses were not significantly affected by the dietary treatments (P>0.05), whereas antioxidant enzyme activities were significantly higher in the SC75 group than in the Con group (P<0.05). In conclusion, SCM can replace up to 50% of dietary FM without adversely affecting the growth performance of P. vannamei. However, higher replacement levels reduced growth and altered antioxidant activity, suggesting metabolic imbalance.
Microalgae, Schizochytrium, Fish meal substitute, Pacific white shrimp, Sustainable aquaculture