Timing of parturition in dairy cattle

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dc.contributor.author Stevenson, Jeffrey S.
dc.date.accessioned 2012-09-20T19:23:55Z
dc.date.available 2012-09-20T19:23:55Z
dc.date.issued 2012-09-20
dc.identifier.uri http://hdl.handle.net/2097/14705
dc.description.abstract A recent survey of calvings of dairy heifers and cows revealed that fall calvings occurred in a nonrandom pattern. The survey was conducted in a large 5,000-cow herd in which pregnant females were watched 24 hr/day. Fewer (P<.005) calves (42%) were born during the night-time hours of darkness (6 p.m. to 6 a.m.) than during daylight hours (58%). The time of day when calving occurred was unrelated to the duration of pregnancy or to any of the climatic variables measured, including daily temperatures (highs or lows), barometric pressure, relative humidity, precipitation, average wind velocity, or percentage of sunshine. Although some reports and popular opinion have suggested that time of calving might be influenced partly by prevailing weather conditions, our data fail to support this notion. We are unable to explain the observed nonrandom pattern of calving, except that it might be influenced by other management routines on the farm. en_US
dc.publisher Kansas Agricultural Experiment Station en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 89-107-S en_US
dc.subject Dairy en_US
dc.subject Parturition en_US
dc.subject Barometric pressure en_US
dc.subject Climate en_US
dc.title Timing of parturition in dairy cattle en_US
dc.type Conference paper en_US
dc.date.published 1988 en_US
dc.citation.epage 20 en_US
dc.citation.spage 17 en_US
dc.description.conference Dairy Day, 1988, Kansas State University, Manhattan, KS, 1988
dc.contributor.authoreid jss en_US

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