Desenvolvimento ponderal e medidas biométricas na estimativa de peso vivo em ovinos Poll Dorset

Abstract

Was evaluated in this study the use of biometrics during the growing breed lambs Poll Dorset, in order to estimate the live weight. In this way the collections were made from birth to 165 days with an interval of 15 days between assessments. 12 lambs were used, 7 males and 5 females born between July and September 2014. The study generated 720 observations of checks and biometric measurements. Each measurement girth measures were taken (PT) using graduated tape measure in centimeters, body length (CC), withers height (WH), hip height (AG) using a hipometer, and finally were heavy. The data were submitted to variance analysis with 5% significance level, the Pearson correlation analysis with 5% probability and from these correlations was generated scatter plots and estimated regression equations. The weight development featured animals with homogeneous racial pattern. The thoracic perimeter (PT) (0.88) was the characteristic most associated with 5 body weight in vivo. The regression equations reaffirmed the high relationship between heart girth and body weight, which was 94%. We conclude that the knowledge of the weight development showed a racial standard, the thoracic perimeter is highly associated with body weight and regression equations generated from biometric measurements are used to estimate the body weight of the breed Poll Dorset sheep.