Barrow and Gilt Vocalizations during a Human Approach Test

  • Sarah J. Myers (Iowa State University)
  • Jessica D. Colpoys (Iowa State University)
  • Johanna Sholar (Iowa State University)
  • Nicholas K. Gabler (Iowa State University)
  • Suzanne T. Millman (Iowa State University)
  • Anna K. Johnson (Iowa State University)


The objective of this study was to investigate differences between barrow and gilt vocalizations during a fear test. Twenty barrows and 20 gilts were tested over two consecutive weeks between 1300 and 1900 hours using a human approach test (HAT). Throughout the test, vocalizations were recorded. Gilts expressed a greater number of low calls compared to barrows; however, barrows expressed a greater number of high calls compared to gilts. Further research should be done to better understand vocalization differences between barrows and gilts during a HAT.

Keywords: ASL R3018, Animal Science, Veterinary Diagnostic and Production Animal Medicine

How to Cite:

Myers, S. J., Colpoys, J. D., Sholar, J., Gabler, N. K., Millman, S. T. & Johnson, A. K., (2015) “Barrow and Gilt Vocalizations during a Human Approach Test”, Iowa State University Animal Industry Report 12(1). doi: https://doi.org/10.31274/ans_air-180814-1335

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Published on
01 Jan 2015
Peer Reviewed