The Dietary Mixture of Betaine, Lactic Acid Bacteria, and Exogenous Digestive Enzymes Enhanced the Growth Performance, Intestinal Health, and Immunity of Nile Tilapia (Oreochromis niloticus) Grown in Outdoor Concrete Tanks
Author's Department
Center for Applied Research on the Environment & Sustainability
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https://doi.org/10.2478/aoas-2022-0056
Document Type
Research Article
Publication Title
Annals of Animal Science
Publication Date
Winter 1-1-2023
doi
10.2478/aoas-2022-0056
Abstract
It has been illustrated that using mixtures of feed additives is more efficient than using individual additives in aquaculture. Hence, this study aimed to study a dietary mixture of betaine, lactic acid bacteria, and exogenous digestive enzymes (ble) on the growth perfor-mance, digestion capacity, intestinal health, and blood indices of Nile tilapia reared outdoors in concrete tanks. Five diets were prepared where the basal diets were mixed with BLE at 0, 0.25, 0.5, 0.75, and 1%. After 90 days, the growth performance of Nile tilapia fed BLE was markedly enhanced in fish fed 0.25 and 0.5% of BLE, while the feed conversion ratio (FCR) was reduced (P<0.05). The lipase activ-ity was significantly higher in tilapia fed BLE at 0.25, 0.5, and 0.75% than 0 and 1%. The amylase activity was meaningfully increased by 0.5% of BLE than 0, 0.25, 0.75, and 1%. The protease activity was significantly higher in tilapia fed BLE at 0.25 and 0.5 than 0, 0.75, and 1% (P<0.05). The intestine of fish fed on BLE showed an increase in intestinal villi density. The villi length, width, and the number of goblet cells were markedly higher in the anterior, middle, and posterior segments of the intestines of tilapia fed ble than in the control group (P<0.05). Further, fish fed BLE had higher intestinal morphometry indices and count of goblet cells than the control. Significantly fish fed 0.25, and 0.5% of BLE had higher hemoglobulin, and hematocrit levels than fish fed 0, 0.75, and 1%. While, fish fed 0.5% had higher red blood cells than fish fed the remaining BLE levels (P<0.05). On the other hand, no marked effects for BLE supplementation were seen on the alanine aminotransferase (alT), aspartate aminotransferase (asT), total protein, albumin, globulin, creatinine, uric acid, and urea. The regression analysis showed that the maximum dose of BLE supplementation to achieve the highest final weight and the lowest FCR is 0.46% and 0.42%, respectively
First Page
205
Last Page
213
Recommended Citation
Magouz, Fawzy I., Salem, Mahmoud F.I., Ali, Hesham A.S. and Dawood, Mahmoud A.O.. "The Dietary Mixture of Betaine, Lactic Acid Bacteria, and Exogenous Digestive Enzymes Enhanced the Growth Performance, Intestinal Health, and Immunity of Nile Tilapia (Oreochromis niloticus) Grown in Outdoor Concrete Tanks" Annals of Animal Science, vol.23, no.1, 2023, pp.205-213. https://doi.org/10.2478/aoas-2022-0056