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oai:www.ideals.illinois.edu:2142/87141 2023-07-11 col_2142_5131 col_2142_16405 com_2142_5130 com_2142_16404 com_2142_14833

Laura Hungerford Nash, Marilyn Louise 2015-09-28T15:38:52Z 2015-09-28T15:38:52Z 10000-01-01 1999 1999 The production simulation model evaluated two regression based strategies: decreased prevalence of poor milking ability (MLK) to <1% via culling over three years, and decreased prevalence of low birth weights (BWT) to 10% by improved gestational feeding. The comparison flock (BASE) had 15% poor milking ability and 25% low birth weight lambs. MLK strategy decreased POST and RM compared to BASE (0.4% and 0.8% respectively), but early years retained more replacement ewe lambs, lowered the number of market lambs, and initially decreased annual profits. Over ten years, average profits increased 0.7% under MLK, until the last seven years when poor milk prevalence was <1% and profits were 2.7% higher. The BWT strategy lowered PERI, POST, and RM (1%, 0.6%, 0.5% respectively). BWT increased profits by 12.6% over BASE, primarily due to the 2.9% increase in market lamb revenues, and was affected to a lesser extent by the 1% cost reduction associated with the lower mortality. Made available in DSpace on 2015-09-28T15:38:52Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 9944948.pdf: 9875919 bytes, checksum: 5cafca046cbbb0797479d2a6d5a9bc3e (MD5) Previous issue date: 1999 Embargo set by: Seth Robbins for item 88422 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 258 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1999. http://hdl.handle.net/2142/87141 (MiAaPQ)AAI9944948 eng Agriculture, Animal Pathology The Identification of Risk Factors for Mortality and Respiratory Disease in Lambs: An Evaluation of Risk Factor Based Health Management Strategies text Veterinary Clinical Medicine Veterinary Clinical Medicine University of Illinois at Urbana-Champaign Dissertation Ph.D.