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Pelleted diet with thermal treatment of ingredients for Octopus americanus : Growth performance and enzymatic activity
Author(s) -
Bastos Penélope,
Gallardo Pedro,
Rosas Carlos,
Vieira Felipe do N.,
Silva Carlos P.,
Oliveira Gabriel B.,
Brignol Fernando D.,
Guzella Luciana,
Mattioni Bruna,
Fracalossi Débora M.
Publication year - 2021
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.14968
Subject(s) - biology , caecum , food science , aquaculture , digestive enzyme , digestion (alchemy) , zoology , nutrient , enzyme , amylase , fishery , biochemistry , ecology , fish <actinopterygii> , medicine , chemistry , chromatography
The octopuses are an emergent group for marine aquaculture diversification. One of the main factors limiting their commercial production is the absence of pelleted or extruded diets that are capable of promoting adequate survival and growth. We tested a pelleted diet with ingredients dried at 40°C and a semi‐moist diet based on of raw ingredients (control diet) on the growth performance and activity of digestive enzymes in Octopus americanus subadults. Compared to the semi‐moist diet, the pelleted diet was well accepted and presented greater stability in the water and lower leaching. Both diets provided similar growth, survival, feed efficiency and conversion rates, although the total ingestion rate and protein and energy intake rates were higher in octopuses that were fed the semi‐moist diet. Furthermore, the pelleted diet stimulated higher activity of acidic proteolytic enzymes, and chymotrypsin activities in the caecum as a physiological response to improve nutrient absorption and assimilation. Therefore, such a diet could be utilized as a starting point to design formulated diets for octopus.