Open AccessAssessment of cholesterol requirements in the prawn, Penaeus japonicus
Author(s) -
Teshima S.,
Ishikawa M.,
Koshio S.,
Kanazawa A.
Publication year - 1997
Publication title -
aquaculture nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.941
H-Index - 79
eISSN - 1365-2095
pISSN - 1353-5773
DOI - 10.1046/j.1365-2095.1997.00097.x
Subject(s) - prawn , cholesterol , biology , penaeus , zoology , casein , body weight , dietary cholesterol , food science , endocrinology , fishery , shrimp
Two feeding experiments were conducted to assess the quantitative cholesterol requirement of the juvenile prawn, Penaeus japonicus . The prawns were fed casein‐based (experiment 1) and casein‐ or crab protein‐based (experiment 2) diets with or without supplemental cholesterol. The daily increases in quantities of body cholesterol (mg kg −1 prawn day −1 ) at maximum growth and dietary cholesterol intake over a 40‐day feeding period were determined. Prawns fed 5 g kg −1 supplemental cholesterol, regardless of protein sources, gave the highest weight gain. Body retention efficiencies of dietary cholesterol (cholesterol retained × 100/cholesterol intake) vary among prawns fed 5 g kg −1 supplemental cholesterol (diets 3, 5 and 7) but dietary cholesterol requirements expressed as mg kg −1 body weight (BW) day −1 were not significantly different (180 to 200 mg kg −1 BW day −1 ). Based on dietary cholesterol requirement, the optimum dietary cholesterol levels for the juvenile prawns were estimated in relation to feeding levels. When feeding levels were 3%, 5% and 7% of body weight, optimum dietary cholesterol levels were 5.0 to 6.0, 3.6 to 4.0, and 2.6 to 2.9 g kg −1 of dry diet, respectively. The present study showed the advantages of determining daily cholesterol requirement (mg kg −1 BW day −1 ) at maximum growth through a factorial method in determining optimum dietary cholesterol levels in P. japonicus .