Open AccessEffects of replacement of fishmeal with cottonseed protein concentrate on the growth, intestinal microflora, haematological and antioxidant indices of juvenile golden pompano ( Trachinotus ovatus )
Author(s) -
Shen Jianfei,
Liu Hongyu,
Tan Beiping,
Dong Xiaohui,
Yang Qihui,
Chi Shuyan,
Zhang Shuang
Publication year - 2020
Publication title -
aquaculture nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.941
H-Index - 79
eISSN - 1365-2095
pISSN - 1353-5773
DOI - 10.1111/anu.13069
Subject(s) - biology , fish meal , cottonseed meal , zoology , feed conversion ratio , food science , glutathione peroxidase , antioxidant , superoxide dismutase , soybean meal , biochemistry , fishery , fish <actinopterygii> , body weight , ecology , raw material , endocrinology
Abstract A 56‐day feeding trial was conducted to investigate the effects of replacing fish meal with cottonseed protein concentrate (CPC) (free gossypol < 7.9 mg/kg) in the diets on the growth, intestinal microflora, haematological and antioxidant indices of juvenile golden pompano ( Trachinotus ovatus ). Six diets were designed: fishmeal diets (FM) which contained 340 g/kg fishmeal, as well as five CPC diets, each with differing CPC concentrations (120, 240, 360, 480 and 600 g/kg) to replace the fish meal. The weight gain rate (WGR) and specific growth rate (SGR) showed no significant difference among groups ( p > .05) with the dietary CPC level ranged from 0 to 360 g/kg. Serum cholesterol (CHO) of C36 and triglyceride (TG) levels of C36 and C12 were significantly higher than the FM ( p < .05). Total protein (TP) levels of C12 were significantly lower than the FM ( p < .05). Among the treatments, C36 had higher glutathione peroxidase (GSH‐PX) and total superoxide dismutase (T‐SOD) than FM ( p < .05). From the data analysis of 16s sequencing, with increasing CPC concentration, the proportion of harmful microbial taxa ( Proteobacteria and Vibrio ) increased. The results of this study support that CPC products are acceptable in practical diets for golden pompano. And the optimal dietary CPC replacement of golden pompano was estimated to be 259.3 g/kg.