Summary and Implications
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.
Iowa State University
Myers, Sarah J.; Colpoys, Jessica D.; Sholar, Johanna; Gabler, Nicholas K.; Millman, Suzanne T.; and Johnson, Anna K.
"Barrow and Gilt Vocalizations during a Human Approach Test,"
Animal Industry Report:
AS 661, ASL R3018.
Available at: http://lib.dr.iastate.edu/ans_air/vol661/iss1/81