Open AccessPartial and total replacement of fishmeal by a blend of animal and plant proteins in diets for Seriola dumerili : Effects on performance and nutrient efficiency
Author(s) -
MongeOrtiz R.,
TomásVidal A.,
GallardoÁlvarez F.J.,
Estruch G.,
GodoyOlmos S.,
JoverCerdá M.,
MartínezLlorens S.
Publication year - 2018
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.12655
Subject(s) - fish meal , biology , corn gluten meal , feed conversion ratio , food science , protein efficiency ratio , nutrient , meal , zoology , amino acid , plant protein , antinutrient , biochemistry , fish <actinopterygii> , body weight , fishery , endocrinology , ecology , phytic acid
A 154‐day trial was performed to assess the use of an alternative protein blend (corn gluten, krill and meat meal) as a substitute for fishmeal in diets for juvenile yellowtail, using four isolipidic (140 g/kg) and isoenergetic diets (24 MJ/kg) with the same digestible protein content (50%). The control diet was FM 100, without replacement, and in FM 66, FM 33 and FM 0, fishmeal was replaced at 33 g/kg, 66 g/kg and 100 g/kg, respectively. At the end of the experiment, no differences in growth parameters were observed. Fish fed the FM 0 diet exhibited the lowest survival (23%). This high mortality may be due to different factors, such as a dietary amino acid imbalance or some antinutrient factors contained in the alternative ingredients. Feed intake, feed conversion ratio, digestible protein intake and protein efficiency ratio were similar in all diets. However, digestible energy intake and protein efficiency retention were lowest in fish fed the FM 0 diet. Apparent digestibility coefficients for protein, energy and amino acids diminished as a substitution for fishmeal increased. Significant differences were observed in the diet whole‐fish body profile amino acid retention ( AAR ) ratio for the seven essential amino acids. In summary, total fishmeal replacement by the blend assayed was not feasible for yellowtail. The FM 66 diet resulted in good growth, high survival and good nutrient efficiency.