Optimal Protein-Lipid Level And Replacement Of Fish Meal With Plant Protein Sources In Feeds Formulated For Pangasianodon Hypophthalmus (Sauvage, 1878)
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Date
2011-06
Authors
Phumee, Preeda
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
The present investigation was carried out to evaluate protein requirement and
the nutritional quality of soybean and animal grade Spirulina (Spirulina platensis) on
sutchi catfish, Pangasianodon hypohpthalmus. A series of three experiments were
carried out. Firstly, to determine the optimal dietary protein to lipid ratio followed by
the determination of the optimum replacement level of fish meal with soybean meal
and finally the evaluation of the nutritional quality of a combination of soybean meal
and Spirulina to replace fish meal. In the first study, triplicate groups of ten fish
(3.69 ± 0.18 g/fish) were fed twice daily for eight weeks with each of the eight
isoenergetic diets comprising a combination of four protein levels (25%, 30%, 35%,
or 40%) and two lipid levels (6% or 12%), respectively. The results showed that, the
growth performance of fish was affected by dietary protein and lipid ratio. At the
same protein level, increased dietary lipid levels resulted in increased growth and
feed utilization. Body protein content increased while body lipid content decreased
with increase in dietary protein levels. The results revealed the presence of a proteinsparing
effect of lipid as fish fed on 30% protein and 12% lipid diet had growth and
feed utilization comparable to those fed on 40% protein and 12% lipid diet. In the
second experiment, the triplicate groups of 15 fish (6.10 ± 0.16 g/fish) were fed eight
isonitrogenous (30% CP) and isoenergetic (18MJ kg-1) diets which contained 0% -
100% dietary protein from Argentine soybean meal (SBM) in replacement of fish
meal, for twelve weeks. Growth performance, feed utilization, dry matter and protein
digestibility worsened with the increase in soybean meal.
Description
Keywords
Protein-Lipid Level , Pangasianodon Hypophthalmus (Sauvage, 1878)