Publication: Effective use of glucose rather than starch in formulated semimoist diets of common octopus (Octopus vulgaris)
Authors
Sánchez Morillo-Velarde, Mª Piedad ; Cerezo Valverde, Jesús ; Aguado Giménez, Felipe ; Hernández, M. D. ; García García, Benjamín
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Wiley
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Description
© 2014 John Wiley & Sons Ltd. This document is the Published version of a Published Work that appeared in final form in Aquaculture Nutrition. To access the final edited and published work see https://doi.org/10.1111/anu.12152
Abstract
The aim of the present work was to test the capacity of Octopus vulgaris to use carbohydrates supplied in three diets: a diet without added carbohydrates (diet C0: 500 g kg−1 water, 200 g kg−1 gelatine, 100 g kg−1 egg yolk powder, 50 g kg−1 freeze-dried Sardinella aurita and 150 g kg−1 freeze-dried Todarodes sagittatus) and two obtained by substituting 50 g kg−1 of T. sagittatus by glucose (diet GLU50) or by starch (diet STA50). The most stable and best-accepted diet was STA50 (SFR 1.26%BW day−1) although there were no significant differences in the growth rates obtained with the three diets: 10.12 g day−1, 9.37 g day−1 and 11.22 g day−1 for C0, GLU50 and STA50, respectively (P > 0.05). The feed efficiency indices were better for GLU50, of particular note being the protein productive value of 71.88% and a feed conversion ratio lower than 1. Protein and lipid digestibility were similar in all the three diets (96–98% for proteins and 85–94% for lipids), whereas carbohydrate digestibility was higher in GLU50 (98%) than in C0 (84%) and STA50 (0.33%). The content of carbohydrates increased in muscle and the digestive gland as a consequence of the increased carbohydrates intake.
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