Efecto de la inclusión de mananoligosacáridos y glutamina sobre parámetros productivos y económicos de alevinos de trucha arcoiris (Oncorhynchus mykiss)

29 páginas : ilustracionesWhit the aim to evaluate the effect of the inclusion of mannoligosaccharides (MOS) and glutamine (GLU) on productive and economic parameters of rainbow trout fingerlings (Oncorhynchus mykiss), an experiment was carried out in the municipality of Monguí - Boyacá, in a commercial production using 72.051 fingerlings of 8 weeks of age with an average weight of 0.42 g, all females, which were randomly distributed in 32 channels of 0.20 m3, where the parameters of water quality remained optimal for the species (10.02 ° C ± 1.028 temperature and 7.23 ± 0.377 ppm dissolved oxygen). The experimental period lasted 30 days, during which 4 treatments were evaluated (Control treatment (CON): Balanced feed of 50% crude protein (PC) without additives, treatment 2: Balanced feed of 50% PC + MOS at 0.5%; treatment 3: 50% balanced food PC + 0.5% GLU; treatment 4: 50% balanced food PC + 0.5% MOS + 0.5% GLU.) Each with 8 repetitions, food was supplied to Apparent satiety 9 times a day, starting at 8am every hour until 4pm. Weekly weighings and control of feed consumption were carried out to determine productive parameters, as well as a partial budget analysis in order to determine the gross margin of partial income of each treatment. Significant differences (P <0.05) in feed consumption between GLU and control treatment were observed, being lower in the first (0.030 Vs 0.033); The feeding rate was reduced by the GLU (2.99) and MOS (2.99) treatments compared to the control treatment. Likewise, differences were found in the retention efficiency of the MOS treatment when compared to the control either energy (32.40 Vs 26.58) and protein (47.4 Vs and 39.5). Within the analysis of partial budgets when calculating the unit cost of the supplementation ($ / produced alevino), no significant differences were found when comparing the control treatment ($ 3.43) with MOS ($ 3.87) and GLU ($ 3.92), but there are differences when it is compared with MOS + GLU which presented the highest cost ($ 4.54). In conclusion, supplementation with MOS increases the energy efficiency and protein in the trout fingerlings, while the addition of GLU decreases the life rate without affecting the growth of the animals in comparison with the controlled diet, which potentiates the use of this additive to improve the efficiency of the system. Both MOS and GLU can be used to offset the cost per finger produced if they are used independently.Con el objetivo evaluar el efecto de la inclusión de mananoligosacaridos (MOS) y glutamina (GLU) sobre los parámetros productivos y económicos de alevinos de trucha arcoíris (Oncorhynchus mykiss) se realizó un experimento en el municipio de Monguí - Boyacá, en un sistema de producción comercial utilizando 72.051 alevinos de 8 semanas de edad con un peso promedio de 0,42 g , en su totalidad hembras, las cuales fueron distribuidas aleatoriamente en 32 canaletas de 0.20 m3, donde los parámetros de calidad de agua se mantuvieron óptimos para la especie (10.02°C± 1.03 de temperatura y 7.23± 0.38 ppm de oxígeno disuelto). El periodo experimental tuvo una duración de 30 días, tiempo en el cual se evaluaron 4 tratamientos (Tratamiento control (CON): Alimento balanceado de 50% proteína bruta (PB) sin aditivos; tratamiento 2: Alimento balanceado de 50% PC + MOS al 0.5%; tratamiento 3: Alimento balanceado de 50% PC + GLU al 0.5%; tratamiento 4: Alimento balanceado de 50% PC + MOS al 0.5% + GLU al 0.5%.) cada uno con 8 repeticiones, el alimento fue suministrado a saciedad aparente 9 veces al día, a partir de las 8am cada hora hasta las 4pm. Se realizaron pesajes semanales y control del consumo de alimento para determinación de parámetros productivos, así como, un análisis de presupuesto parcial con el fin de determinar el margen bruto de ingreso parcial de cada tratamiento. Fueron observadas diferencias significativas (P