Effects of acoustic prevention for crows on grazing pigs

ASARI Yushin, ITO Suzuka

doi:10.20652/jabm.60.1_11

<p>A compound sound (acoustic stimulation) has been shown to be highly effective in preventing the invasion of crows, although the sound might have a detrimental effect on domestic pigs due to their sensitively to stimulus. To clarify such an effect on ten pastured male pigs stimulated by a compound sound, time spent in behaviors (resting, exploring, foraging and others) from July 26 to August 4 (non-acoustic stimulation period), 2021, was compared to natural behaviors recorded from September 22 to October 1 (acoustic stimulation period) in the same year. Percentage of daily time spent for each behavior did not differ between the two periods. One-off behavior was not shown. Therefore, the stimulus from the compound sound, for preventing the invasion of crows, was thought to be of low impact on pastured pigs. However, the compound sound might cause an increase in the vigilance behavior of pigs, because time spent in exploring behavior and resting behavior showed an increase and decrease, respectively, on the first day of acoustic stimulus. Pastured pigs might become habituated to acoustic stimulation, because the percentage of time spent in these behaviors was unchanged from the second day.</p>

Effects of acoustic prevention for crows on grazing pigs

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