Optimizing betaine supplementation level in soybean meal-based diets to enhance feed intake and growth performance of juvenile grouper, Epinephelus fuscoguttatus

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From: Advances in Environmental Biology(Vol. 9, Issue 17 S3)
Publisher: American-Eurasian Network for Scientific Information
Document Type: Report
Length: 3,290 words
Lexile Measure: 1480L

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Abstract :

The present study was conducted to determine the optimum supplementation level of betaine in the diets with high soybean meal (SBM) inclusion level of formulated diet for the juvenile grouper, Epinephelus fuscoguttatus. The feed intake and growth performance of fish fed 40% SBM protein-based diets containing different supplementation levels of betaine (0, 0.5, 1.0, and 1.5%) were evaluated through an 8week feeding trial. In general, the fish fed with all levels of betaine-supplemented SBM-based diets attained higher feed intake (32.1-36.9 g/ fish), weight gain (124.3-139.0 %), specific growth rate (1.4-1.5 %/ d), and survival (80.6-91.7 %) than those without the supplementation (25.9 g/ fish, 100.5 %, and 1.2 %/ d, respectively), although these results (except for the survival) were poorer than those fed with the fish meal-based diet (47.2 g/ fish, 171.6 %, and 1.7 %, respectively). Of all of the betaine-supplemented treatments, fish fed with SBM-based diet containing 1.0 % betaine achieved the best performance in all of the parameters mentioned above. Therefore, the optimum betaine supplementation level in the high SBM-based diet for the juvenile grouper was determined at 1.0 %. Keywords: Betaine, Soybean meal, Feed intake, Growth performance, Juvenile grouper, Epinephelus fuscoguttatus

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Gale Document Number: GALE|A440552414