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Estimation of the dietary vitamin K requirement of juvenile Penaeus chinensis using menadione

, : Estimation of the dietary vitamin K requirement of juvenile Penaeus chinensis using menadione. Aquaculture 126(1-2): 129-135

A 12-week feeding trial was conducted to estimate the optimum dietary vitamin K requirement of juvenile Penaeus chinensis. Purified diets with 8 levels (0, 5, 10,20, 50, 80, 160 and 320 mg/kg) of supplemental menadione were fed to triplicate groups of 18 shrimp stocked in each aquarium. Results indicated that shrimp fed the diet supplemented with 160 mg vitamin K/kg had significantly (P lt 0.05) higher weight gain, feed efficiency ratio (FER) and protein efficiency ratio (PER) than shrimp fed diets supplemented with 5-50 mg vitamin K/kg and the unsupplemented control group. Total plasma prothrombin concentration was highest in shrimp fed the diet supplemented with 320 mg vitamin K/kg, followed by shrimp fed the 80 and 160 mg vitamin K/kg, then the 5-50 mg vitamin K/kg diets. All groups had significantly higher prothrombin levels than the unsupplemented control group. Second-order regression of weight gain, FER and PER on concentrations of dietary menadione suggest that the optimum dietary vitamin K requirement for maximum growth of P. chinensis is about 185 mg/kg diet.

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Accession: 002373441

DOI: 10.1016/0044-8486(94)90254-2

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