Evaluation of fermented date palm seed meal with Aspergillus oryzae on the growth, digestion capacity and immune response of Nile tilapia (Oreochromis niloticus). (27th January 2020)

• Record Type: Journal Article
• Authors: Dawood, Mahmoud A. O.; Eweedah, Nabil M.; Khalafalla, Malik M.; Khalid, Ahmed
• Is Part Of: Aquaculture nutrition. Volume 26:Number 3(2020)
• Page Start: 828
• Page End: 841
• Publication Date: 2020-01-27
• Subjects: Aspergillus oryzae -- digestive enzymes -- immunity -- Nile tilapia -- oxidative status -- palm dates; Aquaculture -- Periodicals; Aquatic animals -- Feeding and feeds -- Periodicals; Fishes -- Feeding and feeds -- Periodicals; 639.3
• DOI: 10.1111/anu.13042
• Languages: English
• ISSNs: 1353-5773

Abstract

Abstract: Five diets were prepared to include date palm seed meal (DSM) fermented with Aspergillus oryzae (ASP) at 0, 50, 100, 150 and 200 g/kg diet and fed for Nile tilapia (26.93 ± 0.01 g) for 8 weeks. Fermented DSM significantly affected the final weight, weight gain and specific growth rate in a dose‐dependent manner ( p = .001) with insignificant differences in feed conversion ratio ( p > .05). Dietary fermented DSM significantly increased the lipase, amylase and protease activities ( p = .008, p = .001 and p = .01, respectively) and the Hb, RBCs and WBCs ( p = .001, p = .005, and p = .009, respectively). The intestinal villus length and number of goblet cells were significantly affected by fermented DSM inclusion ( p < .05). Additionally, the total protein, albumin and globulin significantly affected by the inclusion of fermented DSM in a dose‐dependent manner ( p = .04, p = .045, and p = .03, respectively). Furthermore, dietary fermented DSM significantly altered the phagocytic index, phagocytic activity and lysozyme activity ( p = .001, p = .045 and p = .04, respectively). Based on the polynomial regression analysis, the inclusion of fermented DSM at 103.3–164.8 g/kg diet can be used effectively in tilapia diets for improving the growth, digestion activity and immune response.