Relatório do estágio pré-profissional numa empresa avícola, Boane-Maputo caso de estudo: Influência da idade matriz e do ovo sobre parâmetros de incubação e viabilidade de pintos Ross

Abstract

This Final Course Project was developed within the scope of the curricular internship carried out in a poultry company specializing in the incubation of fertile eggs, with the objective of consolidating theoretical knowledge with practical experience and developing professional skills. The internship was carried out at the poultry company in the incubation sector in the district of Boane, in the province of Maputo, where a case study was conducted to evaluate the influence of the age of the breeder and the egg on incubation parameters and viability of Ross chicks. Productive data from 2376 eggs grouped into two productive phases were analyzed: beginning/peak of laying, peak/persistence of laying and egg age of 8 and 9 days. Statistical analysis was performed using descriptive statistics and analysis of variance, followed by the Tukey HSD test (p < 0.05). The interaction between laying phase and egg age was significant (p < 0.001) for all variables. Eggs from the IPPEP-9 combination had an average weight 3.37 g lower than those from the IPPEP-8 combination. The hatching rate was higher in eggs from full-stage breeder hens (PPEP). Prolonged storage reduced the weight of chicks in the PPEP phase by 1.29 g, however, the same did not happen in chicks from the IPPEP phase. In general, the IPPEP-9 combination showed a lower egg weight, opposite to the chick weight, which was higher, while the PPEP-9 combination showed a higher egg weight, contrary to the chick weight, which was lower. Regarding hatching, the PPEP phase showed better results compared to the IPPEP phase, therefore the differences observed between the treatments are not exclusively attributable to storage time, and may reflect biological characteristics of the different batches of breeder hens evaluated. It was concluded that the influence of the age of the breeding stock and the egg storage period is not uniform, being modulated by the physiological maturity of the breeders.(TRADUÇAO NOSSA)