RESUMO
The fertile egg transport is a crucial issue in the Brazilian broiler aviculture chain. Therefore, many agents intrinsically connected to this process such as the mechanical vibrations, can jeopardize the integrity of this fragile load. Given to this threatening problem the aim of this research was to assess the quality of fertile eggs exposed to different simulated conditions of mechanical vibrations. A mechanical agitator was developed to reproduce the treatments of this study, which were formed by 2 vibration levels. An inferior (instantaneous acceleration, up to 5 m s-2) and a superior (instantaneous acceleration above 10 m/s2), in which they were applied in 2 exposition times, a minimum (60 minutes) and a maximum (180 minutes), making the treatments T1, T2, T3, T4. The assay was conducted in a random modeling in 4 complete blocks that represented the factorial repetitions 2 x 2 +1, with an additional treatment (control). In the total, 2016 eggs from the same batch of matrixes (Cobb-500) in the peak egg reproduction (32-35 weeks) were used. From these eggs, 1920 were exposed to the 4 factorial treatment vibrations (480 eggs per treatment), meanwhile, the remaining 96 were used as control treatment. Among the vibrated eggs, 96 per treatment were sampled in order to be analyzed. In addition, some factors were verified: the diameter and the egg yolk height (EYD and EYH), the d
O artigo não apresenta resumo em português.
RESUMO
Mechanical vibrations resulted from transportation are mentioned to be a high hazardous issue of integrity and physiology found in biological systems. Fertile eggs that are transported from broiler farm to hatcheries are susceptible to harmful results, and it is still unknown all the possible effects in embryo development. Thus, the goal of this study was to evaluate the loss during hatching and in the quality of broiler chicks, after fertile eggs were exposed to simulated mechanical vibrations in different conditions. The experiment was developed in a commercial hatchery in Mogi-Mirim, São Paulo. Altogether, 1920 fertile eggs from Cobb-500 (31 to 34 weeks) were used. These eggs were exposed to vibrations during the transport in a mechanical simulator (Figure 1a). The assay was performed in a random modeling in blocks arranged in a factorial 2 x 2 + 1 with an additional treatment. The analyzed factors were determined by two vibration levels (lower with RSS 2.5 m/s2 and higher with RSS 7.5 m/s2), associated with two periods of exposition time (60 and 180 minutes). For the results, the answers from birth were analyzed using the hatching rate. The quality of broiler chicks obtained by the amount of first line chicks; and the total loss in the hatchery found in the summation of previous answers. Analyzes were done using a modeling of logistical regression, the effects of significan
O artigo não apresenta resumo em português.
RESUMO
Mechanical vibrations resulted from transportation are mentioned to be a high hazardous issue of integrity and physiology found in biological systems. Fertile eggs that are transported from broiler farm to hatcheries are susceptible to harmful results, and it is still unknown all the possible effects in embryo development. Thus, the goal of this study was to evaluate the loss during hatching and in the quality of broiler chicks, after fertile eggs were exposed to simulated mechanical vibrations in different conditions. The experiment was developed in a commercial hatchery in Mogi-Mirim, São Paulo. Altogether, 1920 fertile eggs from Cobb-500 (31 to 34 weeks) were used. These eggs were exposed to vibrations during the transport in a mechanical simulator (Figure 1a). The assay was performed in a random modeling in blocks arranged in a factorial 2 x 2 + 1 with an additional treatment. The analyzed factors were determined by two vibration levels (lower with RSS 2.5 m/s2 and higher with RSS 7.5 m/s2), associated with two periods of exposition time (60 and 180 minutes). For the results, the answers from birth were analyzed using the hatching rate. The quality of broiler chicks obtained by the amount of first line chicks; and the total loss in the hatchery found in the summation of previous answers. Analyzes were done using a modeling of logistical regression, the effects of significan
O artigo não apresenta resumo em português.
RESUMO
The fertile egg transport is a crucial issue in the Brazilian broiler aviculture chain. Therefore, many agents intrinsically connected to this process such as the mechanical vibrations, can jeopardize the integrity of this fragile load. Given to this threatening problem the aim of this research was to assess the quality of fertile eggs exposed to different simulated conditions of mechanical vibrations. A mechanical agitator was developed to reproduce the treatments of this study, which were formed by 2 vibration levels. An inferior (instantaneous acceleration, up to 5 m s-2) and a superior (instantaneous acceleration above 10 m/s2), in which they were applied in 2 exposition times, a minimum (60 minutes) and a maximum (180 minutes), making the treatments T1, T2, T3, T4. The assay was conducted in a random modeling in 4 complete blocks that represented the factorial repetitions 2 x 2 +1, with an additional treatment (control). In the total, 2016 eggs from the same batch of matrixes (Cobb-500) in the peak egg reproduction (32-35 weeks) were used. From these eggs, 1920 were exposed to the 4 factorial treatment vibrations (480 eggs per treatment), meanwhile, the remaining 96 were used as control treatment. Among the vibrated eggs, 96 per treatment were sampled in order to be analyzed. In addition, some factors were verified: the diameter and the egg yolk height (EYD and EYH), the d
O artigo não apresenta resumo em português.