Title: | Replacing fsh meal with rapeseed meal: potential impact
on the growth performance, proftability measures, serum biomarkers,
antioxidant status, intestinal morphometric analysis, and water
quality of Oreochromis niloticus and Sarotherodon galilaeus fngerlings |
Authors: | Eman A. Sallam1 · Aya F. Matter2 · Liza S. Mohammed3 · Aya E. Azam4 · Ahmed Shehab5 · Mohamed Mohamed Soliman6 |
Year: | 2021 |
Keywords: | Rapeseed meal · Supplementation · Growth performance · Antioxidant activities · Comparative impacts |
Journal: | Veterinary Research Communications |
Volume: | Not Available |
Issue: | Not Available |
Pages: | Not Available |
Publisher: | Not Available |
Local/International: | International |
Paper Link: | Not Available |
Full paper | Aya Elsayed_1.pdf |
Supplementary materials | Not Available |
Abstract: |
The aim of this study was to assess the impact of using rapeseed meal as a partial replacement for fsh meal in the diet of farmed tilapia. We evaluated the efect of this replacement on growth performance, proftability, serum biomarkers, antioxidant status, gut morphology, and water quality. A total of 960 apparently healthy Oreochromis niloticus (O. niloticus) and Sarotherodon galilaeus (S. galilaeus) fngerlings were randomly distributed into four dietary treatment groups for each tilapia species (triplicate design, 120 fsh/group, and 40 fsh/replicate). The diets consumed by these groups were formulated to replace fsh meal (FM) with rapeseed meal (RM) at 0%, 10%, 20%, and 30%, respectively, for 12 consecutive weeks. Results indicated that replacing RM in the diet of S. galilaeus (up to 20%) and O. niloticus (up to 10%) resulted in increased growth performance parameters, including fnal weight, weight gain, length, length gain, weight gain rate, and specifc growth rate (SGR), and return parameters such as a total return and relative return compared to the control group. Moreover, an increase in RM up to 30% improved net proft and increased the mucosal length, intestinal villi length, and the number of goblet cells compared with results in its relative control groups. Additionally, we observed a signifcant increase in serum and liver AST and ALT with increased RM replacement. With respect to water parameters, we observed a signifcant diference in the ammonia levels, turbidity, and conductivity with the changes to the percentage of RM in the diets. As for the efect on each species, O. niloticus showed a more signifcant increase in all examined parameters compared to results in S. galilaeus. In summary, up to 10% RM can be used to replace FM without any adverse efects on the growth performance, proftability measures, intestinal morphometric analysis, or water quality |