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- Title
Effects of dietary inclusion of soybean meal and cholesterol on the growth, cholesterol status and metabolism of the giant grouper (Epinephelus lanceolatus).
- Authors
Wu, Tsung‐Meng; Jiang, Jhih‐Jie; Lu, Ruo‐Mei; Lin, Yu‐Hung
- Abstract
The study evaluated effects of cholesterol supplementation in a diet with high soybean meal (SBM) on the growth and cholesterol metabolism of giant grouper (Epinephelus lanceolatus). All‐fish‐meal diet was used as control. The diet including SBM (replaced 50% of the fish meal protein, SBM diet) and the SBM diet supplemented with 10 g/kg cholesterol (SBM + cholesterol) were used as experimental diets. Three diets were each fed to triplicate groups of juvenile grouper (initial body weight: 12.39 ± 0.36 g) in a recirculating aquaculture system for 8 weeks. Grouper fed the control diet showed higher (p <.05) weight gain, feed intake, feed efficiency and protein efficiency ratio than the other two dietary treatments. Hepatic cholesterol concentrations and 3‐hydroxy‐3‐methylglutaryl coenzyme A reductase gene expressions were higher in fish fed the control diet than fish fed the control diet and SBM + cholesterol diet. Hepatic cholesterol 7α‐hydroxylase gene expression was higher in fish fed the SBM + cholesterol diet than that in fish fed the control diet. Results indicate that giant grouper on a diet low in cholesterol can regulate cholesterol synthesis, suggesting that the reduced dietary cholesterol intake in the fish fed diet containing SBM is sufficiently compensated by increased cholesterol synthesis.
- Subjects
CHOLESTEROL metabolism; SOYBEAN meal; CHOLESTEROL content of food; HIGH cholesterol diet; DIETARY cholesterol; EPINEPHELUS
- Publication
Aquaculture Nutrition, 2020, Vol 26, Issue 2, p351
- ISSN
1353-5773
- Publication type
Article
- DOI
10.1111/anu.12997