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Sound avoidance by domestic pigs depends upon characteristics of the signal

By J. C. Talling, N. K. Waran, C. M. Wathes, J. A. Lines

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Abstract

Two groups of 12 pigs, weighing 25 kg, were individually exposed to a test sound in a modified unsignalled one-way avoidance procedure. The test sound for the first group was a recording from an animal transporter played at 84 dB(Lin), with a rise time of 2 s (uniform). For the second group, silent fragments, 59 dB(Lin), were randomly inserted into the recording, played at 86 dB(Lin), and the rise time was changed to <0.1 s (intermittent). 40 consecutive, 5 min tests were carried out for each pig, 20 control and 20 with sound present. Sound present tests were arbitrarily split into 3 groups, comprised of tests 1-6, 7-12 and 13-20, for analysis. Pigs did not significantly avoid the uniform sound in any of the groups of tests, though they did increase their performance of active behaviour when the sound was first introduced (control test no. 20, 15% of behaviour scans; sound test no. 1, 37% of behaviour scans). The intermittent sound was significantly avoided during all 3 sets of sound tests (mean percentage of time spent avoiding sound area: control tests 2-20, 35

Date 1998
Publication Title Applied Animal Behaviour Science
Volume 58
Issue 3/4
Pages 255-266
ISBN/ISSN 0168-1591
Language English
Author Address Silsoe Research Institute, Wrest Park, Silsoe, Beds, MK45 4HS, UK.
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Tags
  1. Animal behavior
  2. Avoidance
  3. Characteristics
  4. Learning
  5. Mammals
  6. Noise
  7. peer-reviewed
  8. sounds
  9. stimuli
  10. Swine
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  1. peer-reviewed