Avaliação dos efeitos da inoculação in ovo de taurina e glicina sobre o pintinho de um dia

Abstract

The study evaluated the effects of in ovo glycine and taurine inoculation on day-old chicks. Given the increasing pressure for higher productive efficiency in poultry science and the critical importance of the perinatal period for future performance, the potential of these amino acids as metabolic modulators applied during the embryonic stage was investigated. A total of 42 fertile eggs from the Hy-Line W-80 strain were randomly distributed into three experimental groups: control (buffered saline), glycine (3 mg/egg), and taurine (95 mg/egg). Between the 18th and 19th days of incubation, 100 µL of the respective solutions were administered into the amniotic cavity. After hatching, body weight, neonatal quality, and hatchability were evaluated. Data were analyzed using [ANOVA/t-test] with a 5% significance level. The results demonstrated that in ovo inoculation of glycine and taurine did not negatively affect embryonic development. No significant differences were observed in body weight at hatch between the treated groups and the control (p > 0.05). The hatchability rate was 100% in the Control and Glycine groups, whereas the Taurine group showed a rate of 85.7%, with no statistically significant difference. Mean body weights remained similar across groups, indicating the absence of a direct effect of these amino acids on late embryonic growth under the experimental conditions adopted. It was concluded that the technique proved to be safe, although it did not promote significant changes in initial performance at hatch.