Cantaxantina e 25-hidroxicolecalciferol e seus efeitos sobre os aspectos reprodutivos de galos

Abstract

In order to evaluate the performance and seminal characteristics of the White Plymouth Rock roosters, fed with diets containing canthaxanthin and 25-hydroxycholecalciferol (25-OH-D3), an experiment was conducted at the Laboratory of Poultry Department of Animal Science at The Federal University of Santa Maria. 80 White Plymouth Rock roosters from 40 to 59 weeks of age were used in this study. Birds were submitted to four treatments: T1 = control diet, T2 = control diet + Canthaxanthin, T3 = control diet + 25-OH-D3, T4 = control diet + Canthaxanthin + 25-OH-D3. A completely randomized design was used with four treatments with 20 replications of one bird. The experimental phase (140 days) was divided into five periods of 28 days to evaluate the performance of birds. The parameters evaluated were: body weight and food intake (measured at the end of each period), motility, vigor, sperm concentration and morphological anomalies (two times per period, with an interval of 14 days). Data were transformed to adjustment the normality and after they were subjected to analysis of variance. The differences between treatments were compared by Tukey test at 10% significance level. The average feed intake during the experimental period was lower in birds fed 25-OH-D3 than males fed with canthaxanthin and 25-OH-D3 diet, but the body weight was similar. The supplementation of 25-OH-D3 and canthaxanthin in diets improved the sperm concentration significantly. Males fed with diets with 25-OH-D3 and, Canthaxanthin and 25-OH-D3 had the lowest level of morphological anomalies in the semen. Canthaxanthin, 25-OH-D3, and Canthaxanthin and 25-OH-D3 when added to the diet improves the sperm motility and vigor of roosters.