The neural response in the chick is beginning during the development of
nerves and formation of the brain. At this stage, the chick begins to
discriminate and recognize the external stimuli, as sound, light, and
heat...etc. In nature, the hen incubates eggs and released the sound for
hearing to chicks inside the egg. The chick will gain comfort and safety for
the hen's feeling beside it. But in the artificial hatchery, there isn't this
technical. So, the hatcheries were
provided with different sounds as external stimuli and studied the neural
response and physiological response. This study was carried out in University
of Anbar, College of Agriculture, Animal Production Dept. by using 240
fertilized egg (Ross 308), distributed to four treatments,T1= first treatment
control treatment without hearing any sound, T2= second treatment hearing the
hen call , T3= treatment third hearing chicks hatched call and T4=
treatment fourth hearing chick with hen call, each treatment divided into three
replicates and each repeater 20 eggs, hearing the sound from the age of 5 days
form incubation and until the day of hatching, the sound was given for a period
of 15 minutes per hour in 24 hours, with usually (100-200 Hz) sound density of 65 dB. the results showing: significantly (P≤0.01)
improvement in neural response (motility of nerves ) and improvement in
physiological response (brain development, weight brain, and increasing growth
hormone and prolactin hormone)
Primary Language | English |
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Subjects | Engineering |
Journal Section | Articles |
Authors | |
Publication Date | December 1, 2018 |
Published in Issue | Year 2018Issue: 3 |