Panorama de um rebanho de ovinos das raças Lacaune e East Friesian sob seleção para produção de leite

Abstract

For the improvement of milk production in sheep occurs, it becomes essential to have an efficient control of the activity. The individual control enables the assessment of animals of greater production and consequently in the direction of these mating systems and selection of discharges in genetic improvement programs. The aim of this study is to conduct a study on the outlook of a flock of sheep of the Lacaune and East Friesian breeds under selection for milk production. Breed and parity separated the animals. The evaluation was perform using the linear fit of the lactation curves and subsequent application of mathematics to obtain integral equations and graphs of average production. It was observe that the Lacaune breed of sheep in the herd are prevalent, more concentrated in the first lactation orders. It was further observed that the Lacaune breed sheep show higher production per day, less decrease after peak production and more persistent East Friesian sheep, 0.26 and 0.23; -0.0005 And -0.0197; 7.61 and 4.19, respectively. Conclude that there is a need in the continuity of the control and measurement of lactations, genealogy, reproductive used, type of gestation and birth weight of lambs to be able to implement breeding programs on the property and that this study allowed for an examination herd, for subsequent comparison with more accurate genetic evaluation work to be carried out on site during the years.