Work

Effect of fish meal replacement with guar meal concentrate on growth, food conversion, digestive enzyme activity and intestinal histology of Gilthead sea bream (Spars aurata)

Year: 2025

Type: article

Abstract: The present study conducted to evaluate the effects of guar meal concentrate (Gmc) as substitute of fish meal on growth, digestive enzymes activity, and intestinal histological of seabream ( Sparus aurata ). Fish fed four experimental diets with a protein level set at 45 % for 12 weeks by replacing the 0 % (Gu0), 10 % (Gu1), 20 % (Gu2), and 30 % (Gu3) of fish meal with Gmc. The results showed that fish fed Gu2 elevated growth and feed utilization indices, respectively. Linear regression analysis revealed a significant negative relationship between Gmc inclusion and specific growth rate, and a positive relationship with feed conversion ratio. The protein body composition content rose when fish fed Gu2 and the lowest body lipid content noticed when seabream fed Gu0, the activity of the digestive enzymes lipase and amylase were reduced when seabream were fed Gmc at all levels. According to this trial, it is advantageous to supplement seabream diets with 10–12 % Gmc in formulated and balanced diets.

Source: Animal Feed Science and Technology

DOI: 10.1016/j.anifeedsci.2025.116605

Authors: Mohamed M. Toutou, M.H. Habashy, Hien Van Doan, Ehab El-Haroun

Institutions: National Institute of Oceanography and Fisheries, Alexandria University, United Arab Emirates University

Language: English

Topic: Aquaculture Nutrition and Growth

Subfield: Aquatic Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDGs: Life below water, Zero hunger

Open Access status: hybrid

Estimated APC paid: $3,250