Nutritive value of corn gluten meal and sesame seed meal in feed for hybrid tilapia, (Oreochromis niloticus x Oreochromis aureus) [electronic resource].

Includes references.

Feeding experiments were conducted with hybrid tilapia in net enclosures to examine the potential use of corn gluten meal and sesame seed meal as a partial replacement of dietary protein. Two dietary protein levels were gradually replaced (40, 60, 80%) by corn gluten meal or sesame seed meal. The experimental diets were fed to groups of hybrid tilapia of 41.5 ± 0.9g initial body weight at a rate 3% of total fish biomass 14 days per 15 days for 150 days. Average water temperature through out the experimental period was 29 °C. Results revealed that. hybrid specific tilapia fed a diet containing 40% corn gluten meal had best percentage weight gain and growth rate compared to control diets. Final body weight was distinctly higher for fish fed com gluten meal than sesame seed meal. Average amounts of feed consumed as affected by protein level increased with increasing dietary protein level from 25 to 30%. With each decrease in percentage corn gluten meal and with sesame seed meal in the diets. the feed conversion ratio of hybrid tilapia was improved gradually. Increasing percentage of test plant protein sources fed had positive significant (P<0.05) effect on hepatosomatic index. The triglyceride contents of the serum decreased significantly (P<0.05) as the percentage of corn gluten meal or sesame seed meal increased in the diet. Evidence is presented to show that corn gluten meal promoted reasonable growth to hybrid tilapia when providing 40 aod 60% of both dietary protein level (25 aod 30%), while sesame seed meal might have been performed more favourably if the diet contributes more than 40% of the total protein when dietary protein level was 25%.

Summary in Arabic.

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