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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Biological Sciences , Malaysian Mahseer
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