dc.contributor.author | Culmer, Megan D | |
dc.date.accessioned | 2012-12-19T12:48:52Z | |
dc.date.available | 2012-12-19T12:48:52Z | |
dc.date.issued | 2012-12-19 | |
dc.identifier.uri | http://hdl.handle.net/10222/15857 | |
dc.description.abstract | The objective of this study was to determine the ability of a passive temperature monitoring system consisting of radio frequency identification (RFID) boluses with thermistors and receiver panels to detect ovulation in high performing dairy cows. The twice-daily reticulo-rumen temperature (Trr) acquisitions of 41 early-lactation Holstein dairy cows were analyzed. The data were analyzed using two criteria: six baseline days (2d, 3d, 4d, 5d, 6d, 7d) and four temperature deviations (0.2°C, 0.3°C, 0.4°C, 0.5°C). The best criteria were chosen by selecting the baseline/deviation combination that gave the best positive predictive value (PPV). The system detected 93 true positive and 267 false positive alerts of ovulation, with a monitoring rate (MR) of 47% and a PPV of 46.2%. There were indications that the Cow Temperature Monitoring System could have a future as an ovulation detection aid, but due to the unreliability of the Wi-Fi transmission of acquisitions, more research needs to be conducted before definite conclusions can be drawn. | en_US |
dc.language.iso | en | en_US |
dc.subject | dairy cow | en_US |
dc.subject | reticulo-rumen temperature | en_US |
dc.subject | passive temperature monitoring | en_US |
dc.subject | ovulation detection | en_US |
dc.title | Detection of Ovulation in Dairy Cows by Twice-Daily Passive Monitoring of Reticulo-Rumen Temperature | en_US |
dc.date.defence | 2012-11-15 | |
dc.contributor.department | Faculty of Agriculture | en_US |
dc.contributor.degree | Master of Science | en_US |
dc.contributor.external-examiner | Dr. Bronwyn Crane | en_US |
dc.contributor.graduate-coordinator | Dr. Dian Patterson | en_US |
dc.contributor.thesis-reader | Dr. Ted Semple | en_US |
dc.contributor.thesis-supervisor | Dr. Leslie MacLaren and Dr. Julie Small | en_US |
dc.contributor.ethics-approval | Not Applicable | en_US |
dc.contributor.manuscripts | Not Applicable | en_US |
dc.contributor.copyright-release | Not Applicable | en_US |