{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,3]],"date-time":"2026-10-03T03:21:17Z","timestamp":1790997677224,"version":"4.1.0"},"reference-count":27,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2021,2,14]],"date-time":"2021-02-14T00:00:00Z","timestamp":1613260800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003825","name":"Magyar Tudom\u00e1nyos Akad\u00e9mia","doi-asserted-by":"publisher","award":["2013\/TKI\/747"],"award-info":[{"award-number":["2013\/TKI\/747"]}],"id":[{"id":"10.13039\/501100003825","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Reprod Domestic Animals"],"published-print":{"date-parts":[[2021,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The objective of this study was to investigate three different calving detection systems in order to assess and compare their efficiency. The study was conducted at a large\u2010scale dairy farm involving 54 Holstein\u2010Friesian dairy cows and heifers. Animals were fitted with multiple devices: a rumination measuring device (Ruminact<jats:sup>\u00ae<\/jats:sup> (RA)), an intravaginal thermometer (Vel\u2019Phone<jats:sup>\u00ae<\/jats:sup> (VP)) and a tail movement sensor (Moocall<jats:sup>\u00ae<\/jats:sup> (MC)) 5 to 7\u00a0days before expected calving and were removed after parturition. RA detects rumination time (RT) and calculates it in 2\u2010hr intervals. VP detects a decrease in vaginal temperature that might indicate calving within 48\u00a0hr and the drop in temperature resulting from the expulsion of the device at calving (EXP message). MC detected increased tail movements and if they persisted for one hour, 1HA message was sent. If they continued during the subsequent hour, then 2HA message was sent. Messages sent by MC within 4\u00a0hr before calving (C4) were selected retrospectively as true positives for the prediction of calving, using the significant changes in RT as a baseline. All other messages were categorized as false positive. The mean value of RT decreased in a non\u2010significant manner between interval \u221222 and \u22124 before calving. Significant decrease of RT was detectable between the two intervals of \u22124 and \u22122 before calving (24.7\u00a0\u00b1\u00a018.6\u00a0min\/2\u00a0hr and 14.0\u00a0\u00b1\u00a013.0\u00a0min\/2\u00a0hr, respectively). There was no significant difference between RT of primiparous and multiparous animals. EXP messages were accurate (positive predictive value 100%) indicators of the onset of calving. We received on average 12.7\u00a0\u00b1\u00a015.2 messages\/animal (11.0\u00a0\u00b1\u00a010.1 and 16.6\u00a0\u00b1\u00a022.2 for cows and heifers, respectively). Positive predictive value was 12.6%. The number of false\u2010positive messages was significantly higher in heifers. All three automatic systems could be used in a large\u2010scale farm environment.<\/jats:p>","DOI":"10.1111\/rda.13904","type":"journal-article","created":{"date-parts":[[2021,2,5]],"date-time":"2021-02-05T19:15:22Z","timestamp":1612552522000},"page":"673-679","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":22,"title":["A field study using different technologies to detect calving at a large\u2010scale hungarian dairy farm"],"prefix":"10.1111","volume":"56","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6093-9226","authenticated-orcid":false,"given":"Andr\u00e1s","family":"Horv\u00e1th","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Food Animal Medicine Clinic University of Veterinary Medicine \u00dcll\u0151 Hungary"},{"name":"MTA\u2013SZIE Large Animal Clinical Research Group \u00dcll\u0151 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