Avaliação de vísceras de frangos de crescimento lento selecionados e não selecionados e de crescimento rápido

Abstract

It is known that different selection pressures, management and nutrition can lead to differences in the development of the viscera of fast growing and slow growing chickens selected and not selected. The objective of this study was to compare the weight of the heart, gizzard, liver and intestine, as well as the length of intestine and cecum among these three classes of broilers. For this purpose, data were collected from 117 unselected slow growth, 120 selected slow growth and 118 fast growing broilers slaughtered and marketed by an establishment at Triângulo Mineiro. The evaluation of the effect of the slaughter batch and the broiler class on the measured traits was performed considering the significance level of 5%. Statistical differences were found for both effects tested on all evaluated traits. For the gizzard, unselected slow growing birds presented higher values of weight. Fast growing birds presented lower relative heart weight when compared to selected and slow growing birds. For liver weight, the fast growing birds had the highest values of relative weight when compared to the other birds evaluated. The weight and length of the intestine and the cecum were higher for the selected fast and slow growing birds. Unselected fast and slow growing birds showed greater divergences and, the selected slow growing birds appear as an intermediate group.FR