Caracterización morfológica de los ovinos mestizos en la estación experimental Pastaza.

Abstract

In Pastaza Experimental Station -ESPOCH was carried out the morphological characterization of tropical sheep of the Blackbelly and Pelibuey breeds according to their categories. Twenty-four crossbred sheep of both breeds with similar ages and categories were used, during 90 days of experimentation where a Completely Random Design in Bifactorial Arrangement was used, where Factor A corresponded to the breeds (P1: Pelibuey and B1: Blackbelly, and the Factor B to the Categories (Ma: Maltona, Mo: Maltón and O: Sheep), each treatment with 4 repetitions, considering each sheep as an experimental unit. The variables evaluated were 20 zoometric and 1 body characteristic (descriptive statistics), 7 zoometric indices (ADEVA). There were no significant differences in the interaction. In Factor A, the best results were the Pelibuey (Corporal I.: 100.62%) and Blackbelly (Metacarpal: 9.96%) breeds. No significant differences were found for the other variables. In Factor B the best results were in Maltona (I. Thoracic: 96.91%; I. Metacarpal: 10.14%), in Maltón (I. Body: 103.73%; I. Metacarpal: 9.92%; I.L.P.R. Thorax: 39.78 %) and in Sheep (I. Body: 99.27 %; I. Thoracic: 91.10 %; ILP.R. Thorax: 37.33 %). The rest did not register significant differences. Once all the variables were analyzed, it was concluded that crossbred sheep are considered long-lined, dolichocephalic, short-lived, concavilineous, ellipometric and for wool purposes, this may be due to the genetic content, productive-sanitary management and environment. It was recommended to carry out conservation and genetic updating programs with the purpose of being able to maintain the qualities of the ideal standard of the breeds in the Pastaza Experimental Station.