Premium
Availability of potato protein concentrate as an alternative protein source to fish meal in greater amberjack ( Seriola dumerili ) diets
Author(s) -
Takakuwa Fumiaki,
Suzuri Keinosuke,
Horikawa Takao,
Nagahashi Kunpei,
Yamada Shinichi,
Biswas Amal,
Tanaka Hideki
Publication year - 2020
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.14480
Subject(s) - biology , fish meal , feed conversion ratio , protein efficiency ratio , meal , food science , dietary protein , zoology , weight gain , net protein utilization , fish <actinopterygii> , body weight , fishery , endocrinology
Potato protein concentrate (PPC) is a promising candidate as a fish meal (FM) substitute because it has high protein and essential amino acid content. In the present study, we replaced FM in greater amberjack diets with PPC to investigate the effect on growth and feed utilization. Four isonitrogenous, isolipidic and isocaloric experimental diets were prepared by substituting 0, 20, 40 and 60% of FM protein with PPC (Control, P20, P40 and P60 respectively). The in vitro protein digestibility of protein in PPC was 88.8%, relative to 100% protein in the FM. The in vitro protein digestibility of protein in the experimental diets also decreased with increasing PPC and was lowest at 84.2% in P60. After the 7‐week feeding trial, final body weight, weight gain and thermal growth coefficient tended to decrease with increasing PPC and were significantly lower in P60 than in the control ( p < .05). Further, fish fed with diets P40 and P60 showed significantly lower feed conversion and protein efficiency ratios than the control group ( p < .05). In conclusion, the results suggest that PPC can replace up to 20% of FM in the diet of greater amberjack without compromising the growth performance or feed efficiency.