An evaluation of replacing fish meal with cottonseed meal protein hydrolysate in diet for juvenile blunt snout bream (Megalobrama amblycephala): Growth, antioxidant, innate immunity and disease resistance. (30th August 2019)

• Record Type: Journal Article
• Authors: Yuan, Xiangyang; Jiang, Guangzhen; Cheng, Huihui; Cao, Xiufei; Shi, Huajuan; Liu, Wenbin
• Is Part Of: Aquaculture nutrition. Volume 25:Number 6(2019)
• Page Start: 1334
• Page End: 1344
• Publication Date: 2019-08-30
• Subjects: antioxidant capability -- cottonseed meal protein hydrolysate -- growth -- immunity -- Megalobrama amblycephala; Aquaculture -- Periodicals; Aquatic animals -- Feeding and feeds -- Periodicals; Fishes -- Feeding and feeds -- Periodicals; 639.3
• DOI: 10.1111/anu.12954
• Languages: English
• ISSNs: 1353-5773

Abstract

Abstract: This study evaluated effects of fishmeal replacement by cottonseed meal protein hydrolysate (CPH) on growth, antioxidant and immunity of Megalobrama amblycephala and its resistance to Aeromonas hydrophila . Fish (average weight: 38.66 ± 0.08 g) were divided into five groups and fed with five isonitrogenous (320 g/kg crude protein), isolipidic (70 g/kg crude fat) and isocaloric (17.8 MJ/kg gross energy) diets replacing fishmeal with 0%, 1%, 3%, 5% and 7% CPH, respectively. The control diet contained 60 g/kg fishmeal. Final weight and weight gain of fish fed 5% and 7% CPH were significantly lower than that of fish fed control diet ( p < 0.05). 3% CPH significantly increased total protein, globulin, acid phosphatase, C3 and C4 contents of plasma and total‐superoxide dismutase and catalase activities of liver ( p < 0.05), as well as upregulated the antimicrobial peptides 1 and 2 ( Leap‐1 and Leap‐2 ) expression levels in liver and spleen ( p < 0.05). After challenge, the lowest mortality was observed in fish fed 3% CPH, and it was significantly lower than that in fish fed the 7% CPH ( p < 0.05). In conclusion, dietary fishmeal replacement by 3% CPH could increase antioxidative capacity, as well as enhance immunity of fish.