The negative effects of mechanical vibrations on transport of fertile eggs / Os efeitos negativos das vibrações mecânicas no tranporte de ovos fertilizados

ABSTRACT

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

RESUMO

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