Dietary supplementation of autolysed yeast enhances growth, liver functionality and intestinal morphology in African catfish

Adeoye, A.A., Obasa, S.O., Fawole, F.J., Wan, A.H.L. and Davies, S.J. (2020) Dietary supplementation of autolysed yeast enhances growth, liver functionality and intestinal morphology in African catfish. Aquaculture Nutrition.

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Abstract

A feeding trial was conducted to evaluate the potential of dietary supplementation of autolysed brewer's yeast (AY) on African catfish. The catfish (22.5 ± 1.15 g/fish, 20 fish 33 L/tank) were fed with either of diets (390 g/kg crude protein, 140 g/kg lipid) supplemented with 0, 3, 6 or 10 g/kg AY (n = 3). After 49 days of feeding, the final body weight and metabolic growth rate of the catfish fed 3 g/kg AY (3‐AY) diet were higher than those fed the control diet (p < .05). The lowest level (p < .05) of alanine transaminase was detected in the blood of the catfish fed 3‐AY diet. The mid‐intestinal histology of the catfish revealed no significant difference (p > .05) in intestinal perimeter ratio. However, an elevated (p < .05) abundance of goblet cells and intraepithelial leucocytes were found in the intestine of catfish fed 3, 6 and 10 g/kg AY diets, with the highest level of abundance recorded in the mid‐intestine of the catfish fed 3‐AY diet. The results suggest that dietary 3 g/kg autolysed brewer's yeast supplementation improves growth performance of African catfish without deleterious effect on liver functionality and gut morphology.

Item Type: Article
Keywords: Brewer’s yeast, Clarias gariepinus, functional feeds, gut morphology, health, hepatic function
Divisions: Animal Production, Welfare and Veterinary Sciences
Depositing User: Ms Kath Osborn
Date Deposited: 09 Mar 2020 14:04
Last Modified: 09 Mar 2020 14:04
URI: http://hau.repository.guildhe.ac.uk/id/eprint/17523

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