Browsing by Subject "Formulated diet"

Now showing 1 - 4 of 4
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    A simple format feed to test the acceptability of ingredients for common octopus (Octopus vulgaris Cuvier, 1797)
    (Wiley, 2015-03-10) Sánchez Morillo-Velarde, Mª Piedad; Cerezo Valverde, Jesús; García García, Benjamín; Biología Celular e Histología
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    Effective use of glucose rather than starch in formulated semimoist diets of common octopus (Octopus vulgaris)
    (Wiley, 2014-08-12) Sánchez Morillo-Velarde, Mª Piedad; Cerezo Valverde, Jesús; Aguado Giménez, Felipe; Hernández, M. D.; García García, Benjamín; Biología Celular e Histología
    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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    Performance of formulated diets with different level of lipids and glutamate supplementation in Octopus vulgaris
    (Wiley, 2013-11-07) Cerezo Valverde, Jesús; Hernández, María Dolores; Aguado Giménez, Felipe; Sánchez Morillo-Velarde, Mª Piedad; García García, Benjamín; Biología Celular e Histología
    Growth, feed efficiency and proximate and lipid class composition of subadults Octopus vulgaris (788 ± 133 g; 18.5°C) fed formulated diets of low lipid (LL: 8 g kg−1) and high lipid levels (HL: 84 g kg−1) and each one of these with three different levels of glutamate supplementation (0, 5 and 20 g kg−1) were compared. All the animals accepted the diets with a survival of 100%. The addition of glutamate did not stimulate feeding rates in any of the assays (2.48–2.64 and 1.86–2.01%Body weight day−1 for LL and HL, respectively; P > 0.05). The best growth, feed efficiency and protein productive value were observed in the groups fed 5 or 20 g kg−1 glutamate supplementation at both lipid levels, with significant differences for LL diet (P < 0.05). A better feed efficiency was achieved with the HL diet (14.6–27.5% vs. 2.5–19.2% for LL diet). There were no significant differences in the proximate composition of carcass (animal excluding the digestive gland). However, a substantial amount of lipids accumulated in the digestive gland, mainly triglycerides, was detected as a consequence of higher lipid ingestion or glutamate supplementation. It was notable the lower percentages of phosphatidylethanolamine and phosphatidylcholine in the digestive gland of animals with best growth.
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    Utilization of diets with different fish oil content in common octopus (Octopus vulgaris Cuvier, 1797) and resulting changes in its biochemical composition
    (Wiley, 2015-10-27) Sánchez Morillo-Velarde, Mª Piedad; Cerezo Valverde, Jesús; García García, Benjamín; Biología Celular e Histología
    The aim of the present work was to obtain the lipid utilization of Octopus vulgaris supplying formulated semi-moist diets with different contents in cod oil (reduced from water content): 0 g kg−1 (A0, 138 g kg−1 lipids DW; N = 4), 100 g kg−1 (A100, 286 g kg−1 lipids DW; N = 6) and 200 g kg−1 (A200, 388 g kg−1 lipids DW; N = 6). The rest of the ingredients were constant in the three diets: 200 g kg−1 gelatin, 100 g kg−1 egg yolk powder, 150 g kg−1 freeze-dried Todarodes sagittatus and 50 g kg−1 freeze-dried Sardinella aurita). Survival was 100% with the three diets. The highest absolute feeding (15.8 ± 1.2 g day−1), growth (9.6 ± 1.4 g day−1; 0.91% BW day−1) and feed efficiency rates (60.3%) were obtained with diet A0. This diet also showed greater retention of lipid and protein than A100 and A200. Protein digestibility was above 95% in all of the diets. Only diet A0 led to a high lipid digestibility coefficient (81.25%), which fell drastically to 12.3% in A200. It was notable the high polar lipid digestibility rates (83–89%) respect to neutral lipids (2–87%) in all diets. The best results were obtained with lipid feeding rates of around 1 g day−1 and a suitable lipid content on 130–140 g kg−1 DW in formulated diets for O. vulgaris.