Evaluación de Diferentes Niveles de Fitasa Aplicados Mediante Aspersión Líquida al Alimento de Oreochromis sp ( Tilapia Roja ) en Estado Juvenil

Abstract

At the Jacalurco Fish Culture Experimental Station, located in the Prish Madre Tierra of the Canton Mera, Pastaza Province, the evaluation of different phytase levels (T0 Testigo; T1 500 IU; T2 1000 IU y T3 1500 IU) applied through liquid sprinkling to the feed of Oreochromis sp (red tilapia) at the young state was carried out. For the variable determination 240 tilapias were used under a completely at random design with 3 replications per treatment. In the size and weight gain there were highly significant differences (P<0.01), between treatments T1 being the best treatment with valus of 40, 95 cm and 153, 66 g, respectively. The total feed consumption had no significant differences with a mean of 450 g; in the alimentary conversion significant differences were obtained (P<0.05) T1 being the best with an index of 1, 09. The best benefit / cost was obtained upon 500 IU phytase with a value of $ 2, 07 and a profit of $ 1, 07. It is therefore recommended to include 500 IU phytase through sprinkling on the balanced feed of red tilapia, as the best responses were obtained in the productive parameters.