Isoleucine improved growth performance, and intestinal immunological and physical barrier function of hybrid catfish Pelteobagrus vachelli × Leiocassis longirostris

• Published in: Fish & shellfish immunology 2021-02, Vol.109, p.20-33
• Main Authors: Zhao, Ye, Yan, Ming-Yao, Jiang, Qin, Yin, Long, Zhou, Xiao-Qiu, Feng, Lin, Liu, Yang, Jiang, Wei-Dan, Wu, Pei, Zhao, Juan, Jiang, Jun
• Format: Article
• Language: English
• Subjects: Amino Acids, Essential - administration & dosage; Amino Acids, Essential - metabolism; Animal Feed - analysis; Animals; Antioxidant capacity; Apoptosis - immunology; beta-Defensins - immunology; beta-Defensins - metabolism; Catfishes - growth & development; Catfishes - immunology; Diet - veterinary; Dietary Supplements - analysis; Dose-Response Relationship, Drug; Growth performance; Hybrid catfish; Hybridization, Genetic; Innate immunity; Intestinal barrier function; Intestines - immunology; Isoleucine; Isoleucine - administration & dosage; Isoleucine - metabolism; Random Allocation; Signal Transduction - immunology
• ISSN: 1050-4648; 1095-9947
• DOI: 10.1016/j.fsi.2020.09.035

This study was performed to determine effects of dietary isoleucine (Ile) on growth performance, and intestinal immunological and physical barrier function of hybrid catfish Pelteobagrus vachelli × Leiocassis longirostris. Six hundred and thirty fish (33.11 ± 0.09 g) were randomly divided into seven experimental groups with three replicates each, and respectively fed seven diets with 5.0, 7.5, 10.0, 12.5, 15.0, 17.5, and 20.0 g Ile kg−1 diets for 8 weeks. The results showed improvement of growth performance, feed intake, feed utilization, relative gut length (RGL), and intestinal fold height and width by dietary Ile (P