Dietary Vitamin B6 Requirement of the Pacific White Shrimp, Litopenaeus vannamei, at Low Salinity

The dietary requirement of vitamin B6 (pyridoxine) of Pacific white shrimp, Litopenaeus vannamei, at 3‰ salinity was evaluated by examining the growth responses, survival, and amino transferase activities. The basal diet was formulated using vitamin-free casein as the protein source. Six levels (0, 35, 70, 105, 140, and 200 mg/kg diet) of vitamin B6 were added to the basal diet, yielding the final vitamin B6 contents of 2.17, 32.43, 65.79,...