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GPS observation of shelter utilisation by Merino ewes

journal contribution
posted on 25.09.2018, 00:00 by DB Taylor, DA Schneider, WY Brown, IR Price, Mark Trotter, DW Lamb, GN Hinch
The present study examined how shelter availability, altitude and temperature influence paddock utilisation by pregnant and lambing Merino ewes. Global positioning systems (GPS) attached to collars allowed continuous tracking of ewes' positions within two paddocks, and environmental conditions were also monitored throughout this time using temperature loggers. Animal tracking devices (UNEtracker GPS collars) were used in the spring (SeptemberNovember) of 2008 (51 days) and 2009 (43 days), 14 days post-shearing, to monitor movement of pregnant grazing fine-wool Merino ewes (5 per paddock per year). The data were used to examine sheep use of lone trees, interior shelter, perimeter shelter and remainder of the paddock during three distinct diurnal activity periods, namely night camping, morning grazing and afternoon grazing. Regular use of shelter was consistently recorded in the two experimental years and in both paddocks. The ewes consistently used sheltered areas and both the leeward and windward sides of shelter, particularly during high sheep chill days. The sheep used the sheltered areas significantly more often than they used the remainder of the paddock, which was devoid of shelter except for lone trees. Night camping did not occur at the highest altitude, but predominantly where shelter was also located. The present study has demonstrated the consistent use of shelter by sheep. The shelter-seeking behaviour of the ewes a month post-shearing suggests that these animals are more sensitive to weather conditions than has been previously reported. © 2011 CSIRO.

Funding

Other

History

Volume

51

Issue

8

Start Page

724

End Page

737

Number of Pages

14

ISSN

1836-0939

Publisher

CSIRO, Australia

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

University of New England

Author Research Institute

Institute for Future Farming Systems

Era Eligible

Yes

Journal

Animal Production Science

Exports

CQUniversity

Exports