Influence of chronic sound stress on productivity of hybro broilers

Abstract

In this study, the influence of chronic sound stress on the productivity of "Hybro" broilers was investigated during the fattening period of 45 days. Chickens were exposed to the sound stress (95 dB) every day during a period of 120 minutes. The intervals between two sound signals varied from 5 to 115 seconds and lasted 5 seconds each. Body weight and food consumption were measured every 15 days. Chronic sound stress resulted in body weight and food consumption decrease and an elevated feed conversion rate. The obtained results indicate that this type of stress exerts a negative influence on the productivity of broiler chickens.

U ovom radu prikazani su rezultati ispitivanja uticaja hroničnog zvučnog stresa na neke proizvodne rezultate pilića hibrida "Hybro" u toku tova od 45 dana. Pilići su svakodnevno izlagani delovanju buke (95 dB) u trajanju od dva časa. U tom periodu interval! između dva uzastopna zvučna signala varirali su od 5 do 115 sekundi, a dužina trajanja signala bila je 5 sekundi. Telesne mase i utrošak hrane su određivani svakih 5 dana ogleda. Hronični zvučni stres je uzrokovao smanjenje mase tela, smanjenje potrošnje hrane i povećanje indeksa konverzije. Postignuti rezultati ukazuju da ova vrsta stresa nepovoljno utiče na proizvodne performanse korišćenog hibrida.