Growth and Vitamin A Enhancement Effects of Provitamin A β-Carotenoid Cassava (Manihot Esculanta Crantz) UMUCASS38 (IITA-TMS-IBAO114121), in the Practical Diets of Fingerling of African Catfish Heterobranchus longifilis

Enyidi, U.D. and Nwahiri, Jennifer (2017) Growth and Vitamin A Enhancement Effects of Provitamin A β-Carotenoid Cassava (Manihot Esculanta Crantz) UMUCASS38 (IITA-TMS-IBAO114121), in the Practical Diets of Fingerling of African Catfish Heterobranchus longifilis. International Journal of Innovative Studies in Aquatic Biology and Fisheries, 3 (1). pp. 23-37. ISSN 2454-7670

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Abstract

Cassava is the fifth globally most important staple crop but like most plant feed ingredients are deficient in vitamin A (VA). Genetically engineered provitamin A β-carotene, (proVAC) cassava may be plausible source of vitamin A and energy to those fishes that can tolerate high carbohydrate diet. The β-carotene in genetically improved cassava root can be converted by fish to vitamin A. We produced five isonitrogenous and isocalorific diets (feed 1 to feed 5 ) with non fermented proVAC cassava and β-carotene inclusion levels of F1, 20%,114.6 μg g-1, F2, 15%,85.95 μg g-1, F3, 10%,57.3 μg g-1, F4, 5%, 28.65 μg g-1 and F5 0%,0 μg g-1. African catfish Heterobranchus longifilis of average weight 1.69 ± 0.5g, were stocked at 10 fish per 15L aquaria in 3 replicates per feed type and fed ad libitum for 10 weeks. The growth and effects of the dietary provitamin A carotene on the fish were examined. Specific growth rate was best for catfish fed F4, 4.95 ± 0.10 % day-1 and reduced with increasing inclusion of proVAC cassava. The FCR was best and same for those fed 0% cassava F5, 1.72 ± 0.06 and 5% cassava F4, 1.73 ± 0.03, decreasing with reducing inclusion of proVAC cassava. The VA content of the catfish was highest for those fed with 20% 114.6μg g-1 proVAC (F1). Catfish VA content increased with increasing inclusion of proVAC cassava and β-carotene values of the diets. Gut length significantly reduced with increasing ProVAC cassava. Inclusion of proVAC cassava should not be above 5% in diets of Heterobranchus longifilis.

Item Type:	Article
Subjects:	L Education > L Education (General) Q Science > Q Science (General)
Divisions:	Faculty of Natural and Applied Sciences
Depositing User:	miss ifeoma agbo
Date Deposited:	31 May 2019 13:02
Last Modified:	31 May 2019 13:02
URI:	http://eprints.gouni.edu.ng/id/eprint/1631

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