Open AccessGrowth and physiological responses of juvenile amberjack ( Seriola dumerili ) fed pellet diets bound by different binders
Author(s) -
Yokoyama Saichiro,
Asada Yuya,
Ishikawa Manabu,
Koshio Shunsuke
Publication year - 2020
Publication title -
journal of the world aquaculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0893-8849
DOI - 10.1111/jwas.12731
Subject(s) - biology , pellet , juvenile , zoology , food science , dry matter , feed conversion ratio , ingestion , body weight , biochemistry , ecology , endocrinology
Appropriate binders have not yet been determined in pellet feed for amberjack Seriola dumerili juveniles. This study aimed to assess the influence of binders (activated gluten [AG], guar gum [GG], and carboxymethylcellulose [CMC]) on growth, feed ingestion, gastric emptying time (GET), digestibility, intestinal histology, body composition, and blood chemical constituents of amberjack juvenile. Dry pellets bound by supplementing different binders (3% AG, 2.5% AG combined with 0.5% GG [AG + GG], and 3% CMC) were fed to fish (mean body weight ± SD = 52.5 ± 0.6 g) for 30 days. After feeding, fish fed the AG diet exhibited growth, protein and dry matter digestibility, and feed utilization levels significantly ( p < .05) higher than those of fish fed the AG + GG and CMC diets. Moreover, GET in fish fed the AG + GG and CMC diets were slower than those from fish in the AG group. These responses appeared to be associated with the viscosity of binders and diets. In fish fed the AG + GG and CMC diets, several blood indices were significantly ( p < .05) lower than those in fish fed the AG diet. These results suggest that AG is a candidate binder in pellet feed for amberjack juvenile.