THE INFLUENCE OF AN ARTIFICIAL SOUND STIM ULATION WITH THE SAME AMPLITUDE OF POWER AND THE VARIANT OF TIME ON CHICKEN HATCHING

This work deals with the influence of an artificial sound stimulation on chicken embryo - Hampshire breed, with the help of an electronical sound generator. Sound means with the same amplitude;of power 1250 mV and the variant of time 380 ms, 210 ms, 176 ms and 134 ms (Figs. 1-4) were put into hatcheries on the 19th day of incubation. The set eggs o f weight 58.00 +/- 1.00 g were incubated there. The set eggs were chos en according to their same weight. In the first hatchery (control grou p) there was no sound means used. In the other hatcheries I:he sound m eans with the same amplitude of power 1250 mV was placed asymmetricall y by the hatchery side. The difference of an artificial sound between hatcheries was in rime. In the second hatchery (1st experimental group ) the time was 380 ms, in the third hatchery (2nd experimental group) the time was 210 ms, in the fourth hatchery (3rd experimental group) t he time was 176 ms and in the fifth hatchery (4th experimental group) the time was 134 ms. When using the sound stimulation on chicken embry o, the beginning of beakclapping, all group beakclapping time and the hatching time were shortened to 483.83 +/- 10.762 hours, 12.33 +/- 2.0 08 hours and 496.17 +/- 12.388 hours in the 2nd experimental group and to 482.83 +/- 5.476 hours, 11.50 +/- 1.871 hours and 494.33 +/- 7.193 hours in the 3rd experimental group. In comparison with the control g roup (without sound stimulation) the beginning of beakclapping 488.33 +/- 3.090 hours, all group beakclapping time 11.83 +/- 1.306 hours and hatching time 500.17 +/- 2.722 hours (Tab. I) were found. The longest time of the beginning of beakclapping (490.17 +/- 2.489 hours) and ha tching time of the all groups (500.83 +/- 3.302 hours) were found in t he first experimental group. The highest percentage of hatchability (1 00.00%) was in the second experimental group and third experimental gr oup, the lowest hatchability (93.33 +/- 4.969%) was found in the 3rd e xperimental group.