Journal
AQUACULTURE RESEARCH
Volume 53, Issue 17, Pages 6254-6263Publisher
WILEY
DOI: 10.1111/are.16098
Keywords
body composition; Caranx ignobilis; feed utilization; growth; lipid; protein
Categories
Funding
- Curtin University
Ask authors/readers for more resources
This study assessed the effects of dietary protein and lipid levels on the growth and body composition of juvenile giant trevally. The results showed that feeding the fish with a diet containing 52% protein and 10% lipid resulted in the highest growth performance and feed utilization.
An 8-week feeding study was carried out to assess the effects of dietary protein and lipid levels on growth, feed utilization and body composition of juvenile giant trevally (Caranx ignobilis Forsskal, 1775). Six diets were produced with three crude protein levels of 42%, 47%, 52% and two crude lipid levels of 10% and 18% in a 3 x 2 factorial design. Treatments were named by their protein and lipid levels, viz. P42:L10, P42:L18, P47:L10, P47:L18, P52:L10 and P52:L18, corresponding P/E of 20.23, 18.73, 22.31, 20.81, 24.63 and 22.12 g/MJ respectively. Growth performance in terms of length, final body weight and specific growth rate were the highest (p < 0.05) when juveniles were fed P52:L10 with P/E of 24.63 g/MJ. The same diet also resulted in the highest effective feed utilization in terms of feed intake and feed conversion ratio. Crude protein in whole body increased when dietary protein or dietary lipid increased from 42% to 52% and 10% to 18% respectively. Significantly increased levels of amino acids in fish's body, including alanine, aspartic acid, glutamine, serine, leucine, threonine, valanine and arginine, were observed in fish fed 52% protein. Increasing dietary lipid from 10% to 18% led to reduced levels of alanine, glutamine, leucine, threonine, valine and arginine in fish. The result suggests that P52:L10 diet with P/E ratio of 24.63 g/MJ subjects the growth requirement of juvenile giant trevally.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available