Author: David Wayne Groschke Publisher: ISBN: Category : Languages : en Pages :
Book Description
In 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
Author: Marisa Lynn Hands Publisher: ISBN: Category : Languages : en Pages :
Book Description
Angus steers (n = 17,919) fed at a single feedlot in southwestern Kansas between 1997 and 2007 were used to evaluate the effects of various demographic and phenotypic characteristics (season of arrival, geographic origin, health status, rate of gain, quality grade, and yield grade) on feedlot health, performance, and carcass traits. Cattle were not commingled and were predominantly preconditioned and backgrounded prior to shipment to the feedlot. Season of arrival was categorized as winter (December, January, and February), spring (March, April, and May), summer (June, July, and August), or fall (September, October, and November). Regions were: SC = Texas, Oklahoma, and New Mexico; C = Colorado and Kansas; NC = Montana, Nebraska, and Wyoming; and SE = Georgia, Mississippi, South Carolina, Tennessee, Virginia, and West Virginia. Steers that originated in SC had the poorest ADG (P 0.01) and those originating in C had the greatest ADG, HCW, and quality grade (P
Author: Robert D. Munson Publisher: ISBN: Category : Languages : en Pages :
Book Description
Auction derived feeder calves (n=1,601; initial BW = 273.5 ± 4.7 kg) were used to examine the effects of delayed administration of the initial steroid implant on health, performance, and carcass characteristics of feedlot cattle. Steers were procured from multiple-source auction markets in the southeastern United States and shipped to a central Kansas feedyard over a 6 week period from December 2009 to January 2010. Steers were rested overnight prior to processing, then were randomly assigned, within arrival block, to 1 of 2 treatments: 1) implanted with Revalor-XS (40 mg estradiol and 200 mg trenbolone acetate) immediately upon arrival (ARRIVAL); or 2) implanted with the same implant after 45 d (DELAYED). Cattle were weighed on a group scale immediately following processing of each block. Feed deliveries were measured using load cells on feed trucks and recorded daily. Cattle were evaluated daily for morbidity and mortality by trained feedyard health personnel. Sick or injured cattle were removed from the home pen for further diagnosis and treatment. Individual animal health data were obtained and recorded daily. Final BW was calculated by dividing HCW by the average dressing percent of the pen. Carcass data (quality grade and yield grade) were obtained by USDA personnel; presence of lung lesions, pleural adhesions, and liver abscesses was evaluated by trained university personnel. Delaying the initial implant tended to reduce morbidity (24.7 vs. 28.5%; P = 0.13) and reduced railer rates (1.8 vs. 3.3%; P = 0.02); however, there were no effects of timing of implant administration (P ≥ 0.31) on rates of retreatment, mortality, lung lesions, or pleural adhesions. Implanting immediately upon feedlot arrival resulted in numerical improvements in ADG and feed conversion, but these differences were not statistical (P ≥ 0.56). Cattle implanted upon arrival had numerically greater HCW and yield grade vs. cattle implanted on d 45; however, these differences were not statistical (P ≥ 0.16). Delaying the initial implant 45 d did not influence animal health, performance parameters or carcass characteristics in high risk feeder calves.
Author: Bobby Cleave Bingham Publisher: ISBN: Category : Languages : en Pages :
Book Description
In 1999-2000, the Texas A & M University Ranch to Rail Program evaluated 1311 steers in two feedlots. The first was the Swisher County Cattle Company in Tulia, Texas and the other was Hondo Creek Cattle Company in Edroy, Texas. Data were collected on several traits, but from this project emphasis was placed on preweaning (PreVac) and postweaning (PosVac) vaccinations and the potential influence on growth and carcass traits. Independent variables used in the analyses were location of the feedyard (LOC), PreVac, PosVac, PreVac*PosVac, LOC* PreVac, LOC*PosVac, LOC*PreVac*PosVac, Ranch of origin (RANCH) nested within LOC*PreVac*PosVac, number of days from weaning to shipping to the feedyard (WNTSHP), and days on feed (DOF). Dependent variables evaluated for live cattle traits were average daily gain (ADG), medicine costs (MED), and initial value upon arriving at the feedyard. Dependent variables evaluated for carcass traits were hot carcass weight (HCW), ribeye area (REA), yield grade (YG), and gross value (GROSS). RANCH (P
Author: David Wayne Groschke
Author: 
Author: Sylvia Cover
Author: Marisa Lynn Hands
Author: Robert D. Munson
Author: Dixon D. Hubbard
Author: Thomas Roger Hembree
Author: 
Author: Bobby Cleave Bingham
Author: Cassie S. Abney