Optimum Digestible Energy to Protein Ratio in Diets for the Korean Rockfish Sebastes schlegeli
Year: 1993
Type: article
Abstract: In order to determine the optimum digestible energy to protein (DE/P) ratio in diets for Korean rockfish, Sebastes schlegeli, 45% and 40% protein diets with graded levels of DE/P ratio were fed to average 36 g and 80 g fish, respectively. The DE/P ratios in the 45 % protein diets ranged from 7.4 to 10.0 kcal/g protein, while those in the 40 % protein diets varied between 7.5 and 8.9 kcal/g protein. Both in the 45% and 40% protein diets, the changes in the DE/P ratios did not affect either the daily weight gain or the feed efficiency. However daily protein retention, daily energy retention, nutrient utilization and chemical composition in carcass varied depending on the DE/P ratios. Thus based on these parameters as criteria, the optimum DE/P ratio for both the 40% and 45% protein diets, estimated to be about 8kcal/g protein. DE/P ratios more than 8 kcal/g protein, led to the deposition of a large amount of body fat, especially in the viscera. Any protein-sparing effect was not observed with the increase of the energy content in the diets. Apparent digestibility coefficients determined by the indirect method, using Cr₂O₃ as an indicator, were around 90%, 98% and 70% for protein, lipid and digestible carbohydrate respectively, without any distinct differences between the diets.
Source: 한국양식학회지
Language: English
Subfield: Aquatic Science
Domain: Life Sciences
SDGs: Zero hunger, Life below water
Open Access status: diamond
OpenAlex ID: W2199096296