The Effects Of Dietary Lipid Level And Source On The Growth And Body Composition Of The Malaysian Mahseer
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Date
2010-04
Authors
Anak Andin, Victor Charlie
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Abstract
The Malaysian mahseer, Tor tambroides is regarded as a highly valued fish in
the country. Popular among sport fishing enthusiast and serve as a delicacy in many
parts of this country, the Malaysian mahseer can fetch a very high price in the
market, there is very limited studies on the nutrition, especially lipid studies, on the
fish. The present study was conducted to determine the best lipid level inclusion in
the fish's diet and also a follow up study on the effect of different lipid source on the
growth and body composition ofthe Malaysian mahseer.
A 13-week feeding trial was conducted using Malaysian mahseer fingerlings
fed six different diets with different lipid level (0%, 3%, 6%, 9%, 12% or 15% added
lipid). The fish was distributed into triplicate each treatment in a series of glass tank
and was fed close to apparent satiation. Fish fed diets with 0% added lipid showed
lower growth compared to fish fed diets with lipid added, and increase in lipid level
from 3% to 15% added lipid however did not affect growth. Body lipid composition
and intraperitoneal index (lPF) increase with dietary lipid level. The data showed the
Malaysian mahseer requires low lipid level (3% - 6%) in their diet.
A follow up study was done using seven different treatments compri'sing of
cod liver oil (CLO), sunflower oil (SFO), canola oil (CO), palm oil (PO), poultry fat
(PF) and two different oil mixes of CLO and SFO with omega-3 : omega--6 ratio of
0,6 (MI) and 0.3 (M2). Fish fed SFO, PO, PF and M2 showed significantly higher
(P<O.05) growth rate compared to CO with PF and M2 giving the best growth
performance. Higher growth rate in fish fed SFO and M2 compared to CLO and Ml
indicated that higher omega-3 in the diet depresses growth of this fish. Fatty acid
profile of the liver and muscle mirrored the lipid source with CLO fed fish having the
highest omega-3 content. The Malaysian mahseer also showed acceptance towards
poultry fat and palm oil without compromising growth, and is a potentially cheaper
lipid source for the Malaysian mahseer feeds.
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Keywords
Biological Sciences , Malaysian Mahseer