Show simple item record

dc.contributor.author Bowen, Kelly en_US
dc.date.accessioned 2007-07-12T17:49:05Z
dc.date.available 2007-07-12T17:49:05Z
dc.date.issued 2000-10-01T00:00:00Z en_US
dc.identifier.uri http://hdl.handle.net/1993/2561
dc.description.abstract Two trials were conducted to determine the effect of hour of weaning on endocrine changes, weaning-to-estrus interval (WEI), and rebreeding performance of sows. A total of 84 Cotswold sows of mixed parity were used in a completely randomized design. Sows were maintained in a cycle of 9h light: 15h dark from day 105 of gestation. After an 18-day lactation sows were weaned at either 0800h (AM; immediately after lights-on) or 1645h (PM; immediately before lights-off). Eighteen sows were fitted with indwelling ear-vein catheters on the day before weaning. Sera, from blood samples taken at 30-minute intervals from the day of weaning to the second day of standing estrus, were analyzed for luteinizing hormone (LH), estradiol, and progesterone. All sows were monitored for WEI, synchronization of post-weaning estrus, pregnancy, and subsequent farrowing performance. Sows were naturally inseminated on the first day of estrus followed by AI at approximately 10 and 24h. (Abstract shortened by UMI.) en_US
dc.format.extent 5819028 bytes
dc.format.extent 184 bytes
dc.format.mimetype application/pdf
dc.format.mimetype text/plain
dc.language en en_US
dc.language.iso en_US
dc.title Influence of hour of weaning on endocrine changes and rebreeding performance of sows en_US
dc.degree.discipline Animal Science en_US
dc.degree.level Master of Science (M.Sc.) en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

View Statistics