Approachability to a Human in Gilts Divergently Selected for Feed Efficiency

  • Johanna Sholar (Iowa State University)
  • Jessica D. Colpoys (Iowa State University)
  • Nicholas K. Gabler (Iowa State University)
  • Aileen F. Keating (Iowa State University)
  • Suzanne T. Millman (Iowa State University)
  • Janice Siegford (Michigan State University)
  • Anna K. Johnson (Iowa State University)


The objective of this study was to evaluate approachability of gilts divergently selected for residual feed intake (RFI) to a novel human. Twenty low-RFI and 19 high-RFI gilts were tested using a human approach test. Testing occurred over two consecutive weeks between 1300 and 1900 hours. Gilts were tested individually within a 4.9 x 2.4 m test arena. Throughout the test, latency to first enter, duration of time spent, and frequency of entrances within 1 m and 0.5 m of the human were recorded. These results suggest that divergent selection for RFI did not alter gilt approach behavior to a novel human.

Keywords: Veterinary Diagnostic and Production Animal Medicine, Animal Science, ASL R3016

How to Cite:

Sholar, J., Colpoys, J. D., Gabler, N. K., Keating, A. F., Millman, S. T., Siegford, J. & Johnson, A. K., (2015) “Approachability to a Human in Gilts Divergently Selected for Feed Efficiency”, Iowa State University Animal Industry Report 12(1). doi: https://doi.org/10.31274/ans_air-180814-1333

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Published on
01 Jan 2015
Peer Reviewed