Comparação do desempenho reprodutivo entre monta natural e inseminação artificial de reprodutores de frangos de corte da linhagem cobb

Abstract

This report describes the activities carried out during the internship from January to April 2022, in a poultry company in Maputo Province and a case study. The internship was objectives to consolidate theoretical and practical knowledge about the breeding of chickens and broiler chickens. In broiler chickens, the creation of a batch consisting of 15,000 birds from 0 to 28 days, in which productive performance was evaluated using the Efficiency Index Productive (IEP). The productive performance showed that the IEP was 408.71 at 28 days, considered good productive performance. In broiler breeders, monitoring was carried out of daily management activities and a case study was developed with the objective of evaluate the reproductive performance of breeders subjected to natural mating (G1) and artificial insemination (G2). For the study, 30 males and 400 females were used, with 32 weeks of age, randomly divided into two groups, G1 being composed of 200 females and 20 males, and G2 for 200 females and 10 males. The birds were subjected to natural breeding and artificial insemination for one week, during which the laying rate was observed, results were 31.5% (442 eggs) G1 and 24.9% (349 eggs) G2. Eggs collected during this period were stored and preserved at a temperature of 16 o C for 7 days. Of these eggs were 440 eggs from natural breeding (G1) and 339 from artificial insemination (G2) were incubated, where they were The following parameters were evaluated, Fertility Rate (TF), Hatching Rate (TE) and hatchability. The results obtained a TF of 59.8% (263 eggs) G1 and 83.2% (282 eggs) G2; TE 46.6% (205 eggs) G1 and 44.8% (152 eggs) and hatchability 77.9% G1 and 53.9% for G2. Data analysis was carried out using the Chi-square method at a significance level of 5%. Where differences were observed significant differences in the fertility rate and hatchability (p<0.001) of the two groups, and no significant differences between groups regarding hatching rate (p>0.05). Fertility showed was better in G2 compared to G1, and the laying, hatching and hatchability rates were better in G1 in relation to G2, however, these rates are below recommended. On the other hand, the rate of late mortality in this study, reached 69.3% and 56.8% for artificial insemination and mounting natural, respectively. In general, failures in the management of breeders, inconsistencies in the practice of incubation, excess weight in breeders, among other factors, may have contributed contributed to low reproductive outcomes(TRADUÇÃO NOSSA)