Scrotal circumference of Australian beef bulls

Fordyce, Geoffry, McGowan, Michael R., Lisle, Allan, Muller, Tracy, Allen, Jack, Duff, Christian, Holroyd, Richard G., Corbet, Nicholas J. and Burns, Brian M. (2014) Scrotal circumference of Australian beef bulls. Theriogenology, 81 6: 805-812. doi:10.1016/j.theriogenology.2013.12.020

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Author Fordyce, Geoffry
McGowan, Michael R.
Lisle, Allan
Muller, Tracy
Allen, Jack
Duff, Christian
Holroyd, Richard G.
Corbet, Nicholas J.
Burns, Brian M.
Title Scrotal circumference of Australian beef bulls
Journal name Theriogenology   Check publisher's open access policy
ISSN 0093-691X
Publication date 2014-04-01
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.theriogenology.2013.12.020
Volume 81
Issue 6
Start page 805
End page 812
Total pages 8
Place of publication Philadelphia, PA, United States
Publisher Elsevier
Language eng
Subject 1103 Clinical Sciences
3402 Equine
3403 Food Animals
3404 Small Animals
Formatted abstract
Normal range for scrotal circumference in Australian beef bulls was established using more than 300,000 measurements of breed, management group, age, liveweight, and scrotal circumference. The data used were derived from Australian bull breeders and two large research projects in northern Australia. Most bulls were within 250 to 750 kg liveweight and 300 to 750 days of age. The differences between breeds and variances within breeds were higher when scrotal circumference was predicted from age rather than liveweight, because of variance in growth rates. The average standard deviation for predicted scrotal circumference from liveweight and age was 25 and 30 mm, respectively. Scrotal circumference by liveweight relationships have a similar pattern across all breeds, except in Waygu, with a 50 to 70 mm range in average scrotal circumference at liveweights between 250 and 750 kg. Temperate breed bulls tended to have higher scrotal circumference at the same liveweight than tropically adapted breeds. Five groupings of common beef breeds in Australian were identified, within which there were similar predictions of scrotal circumference from liveweight. It was concluded that liveweight and breed are required to identify whether scrotal circumference is within normal range for Australian beef bulls that experience a wide range of nutritional conditions.
Keyword Beef cattle
Scrotal circumference
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online 27 December 2013

Document type: Journal Article
Sub-type: Article (original research)
Collections: Queensland Alliance for Agriculture and Food Innovation
Official 2014 Collection
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