Influence Of Dietary Plant Oils On Growth Performance, Muscle And Liver Fatty Acid Composition And Lipogenic Enzyme Activities Of Two Pangasiid Species
Loading...
Date
2010-05
Authors
Asdari, Roslianah
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
The study was conducted to determine the possibility of plant oils to substitute
fish oil in the diets for Pangasionodon hypophthalmus (Sauvage, 1878) and Pangasius
nasutus (Bleeker, 1863) on growth performance, nutrient utilization, body indices and
muscle and liver fatty acid composition. The effect of fish oil substitution by crude palm
oil in the diets for P. hypophthalmus (Sauvage, 1878) juvenile on lipogenic enzyme
activities was also investigated. In the first experiment, four isonitrogenous (300 g kg-1
crude protein), isoenergetic (21 kJ g-1) experimental diets were formulated to contain
fish oil (FO), soybean oil (SBO), crude palm oil (CPO) and linseed oil (LO),
respectively, as lipid sources each at inclusion level of 120 g kg-1 and fed to triplicate
groups of 15 juvenile iridescent shark, P. hypophthalmus (Sauvage, 1878) (mean weight
10.00 ± 0.70 g) and triplicate groups of 10 juvenile P. nasutus (Bleeker, 1863) (mean
weight 10.66 ± 0.04 g) to apparent satiation twice daily for 12 weeks. The study has
demonstrated the possibility of 100% substitution of FO with vegetable oils such as
CPO, SBO and LO in the diet of juvenile P. hypophthalmus and P. nasutus with
positive effect on growth, and that crude palm oil and soybean oil are the most suitable
vegetable oils as lipid sources in the diet for juvenile P. hypophthalmus and P. nasutus,
since better growth performance was recorded in fish maintained on these oil-based
diets for 12 weeks. The study also highlighted the requirements for n-3 and n-6 fatty
acids series in terms of lower n-3/n-6 ratio, to promote better growth at the juvenile
stage of P. hypophthalmus and P. nasutus.
Description
Keywords
Dietary Plant Oils , Pangasiid Species