{"title":"The accuracy of several aids in detecting oestrus in dairy cattle","authors":"W.J. Fulkerson , G.J. Sawyer , I. Crothers","doi":"10.1016/0304-3762(83)90141-4","DOIUrl":null,"url":null,"abstract":"<div><p>The accuracy and efficiency of oestrus detection using behavioural observations only, or in combination with hormone-treated steers or tail paint, was assessed on a large commercial dairy herd of 120 cows. The oestrus detection rate was 50, 88 and 80%, respectively, with no significant difference in conception rate between methods following artificial insemination. Continual observation for 12 h during the day detected 83% of oestrous cows over the 3-week period.</p><p>Progesterone analysis of fore-milk confirmed oestrus in all cows detected except for 5 cows detected with steers and 4 with tail paint. As all except 2 of these animals conceived at that oestrus, the accuracy of the 3 methods was considered to be the same.</p><p>Oestrous activity in cows was high at morning milking, then rose again to reach a peak in early afternoon. Mean number of mounts/oestrous cow, observed during the 12 h of continual daily observation, was 14.6 +- 1.8.</p><p>The implication of these results on dairy herd management are discussed.</p></div>","PeriodicalId":100106,"journal":{"name":"Applied Animal Ethology","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1983-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0304-3762(83)90141-4","citationCount":"18","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Animal Ethology","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0304376283901414","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 18
Abstract
The accuracy and efficiency of oestrus detection using behavioural observations only, or in combination with hormone-treated steers or tail paint, was assessed on a large commercial dairy herd of 120 cows. The oestrus detection rate was 50, 88 and 80%, respectively, with no significant difference in conception rate between methods following artificial insemination. Continual observation for 12 h during the day detected 83% of oestrous cows over the 3-week period.
Progesterone analysis of fore-milk confirmed oestrus in all cows detected except for 5 cows detected with steers and 4 with tail paint. As all except 2 of these animals conceived at that oestrus, the accuracy of the 3 methods was considered to be the same.
Oestrous activity in cows was high at morning milking, then rose again to reach a peak in early afternoon. Mean number of mounts/oestrous cow, observed during the 12 h of continual daily observation, was 14.6 +- 1.8.
The implication of these results on dairy herd management are discussed.
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