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Morillo-Velarde P.S.,IMIDA Acuicultura Consejeria de Agricultura y Agua de la Region de Murcia Murcia Spain | Cerezo Valverde J.,IMIDA Acuicultura Consejeria de Agricultura y Agua de la Region de Murcia Murcia Spain | Aguado-Gimenez F.,IMIDA Acuicultura Consejeria de Agricultura y Agua de la Region de Murcia Murcia Spain | Hernandez M.D.,IMIDA Acuicultura Consejeria de Agricultura y Agua de la Region de Murcia Murcia Spain | Garcia Garcia B.,IMIDA Acuicultura Consejeria de Agricultura y Agua de la Region de Murcia Murcia Spain
Aquaculture Nutrition | Year: 2015

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. © 2015 John Wiley & Sons Ltd. Source

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