Effective use of glucose rather than starch in formulated semimoist diets of common octopus (Octopus vulgaris) |
| |
| Authors: | P.S. Morillo‐Velarde J. Cerezo Valverde F. Aguado‐Giménez M.D. Hernández B. García García |
| |
| Affiliation: | IMIDA‐Acuicultura, Consejería de Agricultura y Agua de la Región de Murcia, Murcia, Spain |
| |
| Abstract: | The aim of the present work was to test the capacity of O. 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: 10.1 g day?1, 9.4 g day?1 and 11.2 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 72% and a feed conversion ratio lower than 1. Protein and lipid digestibility were similar in all 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. |
| |
| Keywords: | carbohydrates digestibility formulated diet growth nutrition
Octopus vulgaris
|
|
|
