Show simple item record

dc.contributor.advisorHerring, Andy D.
dc.contributor.advisorSkaggs, Chris L.
dc.creatorGroschke, David Wayne
dc.date.accessioned2005-11-01T15:44:24Z
dc.date.available2005-11-01T15:44:24Z
dc.date.created2005-08
dc.date.issued2005-11-01
dc.identifier.urihttp://hdl.handle.net/1969.1/2515
dc.description.abstractIn 2003-2004, the Texas A&M University Ranch to Rail South program evaluated 430 steers in Edroy, TX. Data were analyzed on several traits, but feeder calf frame and muscle grades and health status were emphasized. Muscle thickness grade (M), frame size grade (F), muscle thickness by frame size interaction (M*F), sire breed type classification (SIRECODE), lung score (LUNG), ranch of origin (RANCH), and level of treatment (LVLTRT) were evaluated as independent variables as affecting ribeye area (REA), marbling score (MARB), fat thickness (FAT), hot carcass weight (HCW), average daily gain (ADG), medicine costs (MED), days on feed (DOF), initial value (VALUE), carcass value (CARVAL), and initial weight (INWT). M (P < .0001), F (P < .0001), M*F (P < .0001), SIRECODE (P < .0001), RANCH (P < .0001), LVLTRT (P = .0016), and INWT (P < .0001) were all significant influences on initial value upon arrival. SIRECODE (P = .0344), RANCH (P = .0571), and INWT (P < .0001) were significant in impacting carcass value. RANCH (P = .0045) and INWT (P < .0001) were very significant influences upon ribeye area when the steers were harvested. RANCH (P < .0001) was also influential on marbling score, and LVLTRT (P = .1096) was slightly significant for MARB. M (P = .0659), F (P = .0721), and M*F (P = .0722) were moderately significant in influencing fat thickness. However, SIRECODE (P = .0148) and RANCH (P < .0001) were significant in impacting FAT. HCW was significantly affected by SIRECODE (P = .0056), RANCH (P < .0001), and INWT (P < .0001). For live performance, SIRECODE (P = .0120) and RANCH (P < .0001) were significant influences upon average daily gain. SIRECODE (P < .0001), RANCH (P < .0001), LVLTRT (P < .0001), and INWT (P < .0001) were significant influences on days on feed for the steers. Finally, RANCH (P < .0001) and LVLTRT (P < .0001) were significant in affecting medicine costs. These findings suggest ranch of origin and breed type play major roles in affecting live and carcass performance.en
dc.format.extent135374 bytesen
dc.format.mediumelectronicen
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.publisherTexas A&M Universityen
dc.subjectFeeder Gradesen
dc.subjectHealth Statusen
dc.titleEvaluation of USDA feeder calf grades and health status of steers and their impact on live and carcass performance in south Texasen
dc.typeBooken
dc.typeThesisen
thesis.degree.departmentAnimal Scienceen
thesis.degree.disciplineAnimal Scienceen
thesis.degree.grantorTexas A&M Universityen
thesis.degree.nameMaster of Scienceen
thesis.degree.levelMastersen
dc.contributor.committeeMemberKlinefelter, Danny A.
dc.contributor.committeeMemberSawyer, Jason E.
dc.type.genreElectronic Thesisen
dc.type.materialtexten
dc.format.digitalOriginborn digitalen


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record