Changes in Activity and Milk Components Around the Onset of Peripartum Diseases in Dairy Cows
| dc.contributor.author | Griffith, Abigail Susanne | en |
| dc.contributor.committeechair | Petersson-Wolfe, Christina S. | en |
| dc.contributor.committeemember | Schramm, Hollie H. | en |
| dc.contributor.committeemember | Bewley, Jeffrey Michael | en |
| dc.contributor.department | Dairy Science | en |
| dc.date.accessioned | 2014-08-24T08:00:20Z | en |
| dc.date.available | 2014-08-24T08:00:20Z | en |
| dc.date.issued | 2014-08-23 | en |
| dc.description.abstract | Activity and milk components were examined around disease onset in the periparturient period. Cows were monitored for daily rest bouts, rest duration, rest time, and step activity from -21 to +30 d relative to calving. Lactose concentration, fat to protein ratio (F:P), and milk yield were monitored. Diseases analyzed were assisted calving, mastitis, subclinical ketosis (SK), and a multiple disease category (MULTI) for animals who experienced more than one disease. Rest bouts decreased (d 0), step activity increased (d 0), and rest duration decreased (d -1) in animals that experienced assisted calving compared to controls. Mastitic cows showed fewer rest bouts (d -4, -3, -2, -1, and 0), increased activity (d -4, -2, and -1), decreased rest time (d -6, -5, -4, and -2), and decreased milk yield (d -4, -2, -1, 0) compared to controls. Cows with SK showed increased activity (d -5, -4, -3, and -2), decreased rest duration (d -7, -6, -5, -4, and -3), rest time (d -7, -6, -5, -4, -3, and -2), milk yield (d -4, -3, -2, -1, and 0) and lactose concentration (d -3, -2, -1, and 0) compared to controls. Animals categorized as MULTI showed increased activity (d -6, -5, -4, -3, and -2), increased F:P (d -2, -1 and 0), decreased rest time (d -5, -4, -3, and -2), and decreased lactose concentration (d -6, -5, -4, -5, -3, -2, -1, and 0) compared to controls. Deviations in activity and milk components could be used to proactively manage herd health. | en |
| dc.description.degree | Master of Science | en |
| dc.format.medium | ETD | en |
| dc.identifier.other | vt_gsexam:3499 | en |
| dc.identifier.uri | http://hdl.handle.net/10919/50414 | en |
| dc.publisher | Virginia Tech | en |
| dc.rights | In Copyright | en |
| dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | en |
| dc.subject | behavior | en |
| dc.subject | deviations | en |
| dc.subject | disease | en |
| dc.title | Changes in Activity and Milk Components Around the Onset of Peripartum Diseases in Dairy Cows | en |
| dc.type | Thesis | en |
| thesis.degree.discipline | Dairy Science | en |
| thesis.degree.grantor | Virginia Polytechnic Institute and State University | en |
| thesis.degree.level | masters | en |
| thesis.degree.name | Master of Science | en |
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