We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Effects of dietary protein and lipid levels with different protein-to-energy ratios on growth performance, feed utilization and body composition of juvenile red-spotted grouper, Epinephelus akaara.
- Authors
Wang, J.T.; Han, T.; Li, X.Y.; Yang, Y.X.; Yang, M.; Hu, S.X.; Jiang, Y.D.; Harpaz, S.
- Abstract
An 8-week feeding trial was conducted to assess dietary protein and lipid levels on growth performance, feed utilization and body composition of juvenile red-spotted grouper (7.85 ± 0.03 g fish−1). Nine semi-purified diets were formulated containing varying protein levels (440-520 g kg−1, dry matter) and lipid levels (60-120 g kg−1, dry matter). The weight gain of juvenile Epinephelus akaara was affected by dietary protein ( p = .005) and its interaction with dietary lipid ( p = .020). Viscerosomatic index, intraperitoneal fat ratio and whole-body lipid level increased with increasing dietary lipid level ( p < .001). Nitrogen retention was not affected by dietary protein and lipid, while lipid retention decreased with increasing dietary lipid level ( p < .001). The plasma blood urea nitrogen increased with increasing dietary protein level ( p = .003). This study showed that diet with 520 g kg−1 protein and 60 g kg−1 lipid with 30.58 mg kJ−1 P:E provided a maximal growth for this species. Moreover, an increase in dietary lipid levels (from 60 to 90 g kg−1) could reduce the protein requirement (from 520 to 480 g kg−1) without affecting the growth performance, while higher fat deposition was observed in fish fed high-lipid diets.
- Subjects
EPINEPHELUS akaara; LOW-protein diet; BODY composition of fish; FISH feeds; FISH growth
- Publication
Aquaculture Nutrition, 2017, Vol 23, Issue 5, p994
- ISSN
1353-5773
- Publication type
Article
- DOI
10.1111/anu.12467