Estudo da densidade de criação como ferramenta para avaliar bem-estar de galinhas poedeiras em sistema automatizado

Abstract

The improvement of Brazilian poultry is due to technological, genetic as well as nutritional and health factors, which contribute to the evolution of the sector in the country. Egg production has been increasing significantly and 99.5% of the eggs produced are for internal consumption and linked to this, consumption per capita increases progressively. This growth is related to the breeding model, which is, in an intensive way in cages, which allows to create high numbers of birds in a reduced space. Breeding in cages is predominant in the country's poultry production, but it has been the target of criticism since the increase in density has a direct relationship with the well-being of laying hens. The aim of this study was to report the effect of density on the mortality rate of laying hens of the lines Lohmann Lsl lite lote and Lohmann Brown lite, reared in conventional cage systems. Through the analysis of the data it was observed that the decrease in the density of birds per cage reflected in a drop in the mortality of the flock, and the Lohmann Lsl lite lineage had a drop in the mortality rate of 0.07% whereas the laying hens Lohmann Brown lite had a fall of 0.76% in mortality, being more significant. Therefore, after analysis carried out in a 2x2 factorial arrangement, two lines and two densities, it is concluded that the density shows interference for the different lines, with the two factors acting in an integrated manner.