Relationship among performance, carcass, and feed efficiency characteristics, and their ability to predict economic value in the feedlot

K. M. Retallick, Dan B Faulkner, S. L. Rodriguez-Zas, J. D. Nkrumah, D. W. Shike

Research output: Contribution to journalArticle

Abstract

A 4-yr study was conducted using 736 steers of known Angus, Simmental, or Simmental × Angus genetics to determine performance, carcass, and feed efficiency factors that explained variation in economic performance. Steers were pen fed and individual DMI was recorded using a GrowSafe automated feeding system (GrowSafe Systems Ltd., Airdrie, Alberta, Canada). Steers consumed a similar diet and received similar management each year. The objectives of this study were to: 1) determine current economic value of feed efficiency and 2) identify performance, carcass, and feed efficiency characteristics that predict: carcass value, profit, cost of gain, and feed costs. Economic data used were from 2011 values. Feed efficiency values investigated were: feed conversion ratio (FCR; feed to gain), residual feed intake (RFI), residual BW gain (RG), and residual intake and BW gain (RIG). Dependent variables were carcass value ($/steer), profit (&dollar;/steer), feed costs (&dollar;/steer ·d-1), and cost of gain (&dollar;/kg). Independent variables were year, DMI, ADG, HCW, LM area, marbling, yield grade, dam breed, and sire breed. A 10% improvement in RG (P < 0.05) yielded the lowest cost of gain at &dollar;0.09/ kg and highest carcass value at &dollar;17.92/steer. Carcass value increased (P < 0.05) as feed efficiency improved for FCR, RG, and RIG. Profit increased with a 10% improvement in feed efficiency (P < 0.05) with FCR at &dollar;34.65/steer, RG at &dollar;31.21/steer, RIG at &dollar;21.66/steer, and RFI at &dollar;11.47/steer. The carcass value prediction model explained 96% of the variation among carcasses and included HCW, marbling score, and yield grade. Average daily gain, marbling score, yield grade, DMI, HCW, and year born constituted 81% of the variation for prediction of profit. Eighty-five percent of the variation in cost of gain was explained by ADG, DMI, HCW, and year. Prediction equations were developed that excluded ADG and DMI, and included feed efficiency values. Using these equations, cost of gain was explained primarily by FCR (R2 = 0.71). Seventy-three percent of profitability was explained, with 55% being accounted for by RG and marbling. These prediction equations represent the relative importance of factors contributing to economic success in feedlot cattle based on current prices.

Original languageEnglish (US)
Pages (from-to)5954-5961
Number of pages8
JournalJournal of Animal Science
Volume91
Issue number12
DOIs
StatePublished - Jan 1 2013

Fingerprint

feedlots
economic valuation
feed conversion
Economics
Costs and Cost Analysis
marbling
profits and margins
prediction
Simmental
Angus
Alberta
feed intake
Canada
breeds
economics
economic performance
Diet
dams (mothers)
average daily gain
carcass characteristics

Keywords

  • Carcass characteristics
  • Feed efficiency
  • Feedlot economics
  • Performance

ASJC Scopus subject areas

  • Food Science
  • Animal Science and Zoology
  • Genetics

Cite this

Relationship among performance, carcass, and feed efficiency characteristics, and their ability to predict economic value in the feedlot. / Retallick, K. M.; Faulkner, Dan B; Rodriguez-Zas, S. L.; Nkrumah, J. D.; Shike, D. W.

In: Journal of Animal Science, Vol. 91, No. 12, 01.01.2013, p. 5954-5961.

Research output: Contribution to journalArticle

Retallick, K. M. ; Faulkner, Dan B ; Rodriguez-Zas, S. L. ; Nkrumah, J. D. ; Shike, D. W. / Relationship among performance, carcass, and feed efficiency characteristics, and their ability to predict economic value in the feedlot. In: Journal of Animal Science. 2013 ; Vol. 91, No. 12. pp. 5954-5961.
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