TY - JOUR
T1 - Metabolizable energy utilisation in growing beef cattle
T2 - efficiencies of protein and fat synthesis
AU - Hales, K.
AU - Old, C. A.
N1 - Publisher Copyright:
© Wageningen Academic Publishers 2019
PY - 2019
Y1 - 2019
N2 - Ordinary least squares (OLS) estimates of efficiencies of metabolizable energy (ME) utilization are often inconsistent with thermodynamic favorabilities of underlying mechanisms. Efficiencies of ME utilization for maintenance (km), gain, protein and fat synthesis (kg, kp and kf, respectively) were evaluated for 152 growing beef steers in OLS (frequentist) and non-linear Bayesian frameworks. Estimators determined in OLS frameworks were not always consistent with thermodynamic favorabilities of underlying mechanisms and were characterized by inflated variances, the latter indicating poor model specification. When evaluated in Bayesian frameworks, maintenance was a variable function of ME intake and all estimators characterizing efficiencies of ME utilization were consistent with theoretical properties regarding maintenance and gain in growing and finishing beef cattle.
AB - Ordinary least squares (OLS) estimates of efficiencies of metabolizable energy (ME) utilization are often inconsistent with thermodynamic favorabilities of underlying mechanisms. Efficiencies of ME utilization for maintenance (km), gain, protein and fat synthesis (kg, kp and kf, respectively) were evaluated for 152 growing beef steers in OLS (frequentist) and non-linear Bayesian frameworks. Estimators determined in OLS frameworks were not always consistent with thermodynamic favorabilities of underlying mechanisms and were characterized by inflated variances, the latter indicating poor model specification. When evaluated in Bayesian frameworks, maintenance was a variable function of ME intake and all estimators characterizing efficiencies of ME utilization were consistent with theoretical properties regarding maintenance and gain in growing and finishing beef cattle.
KW - beef cattle
KW - efficiency
KW - mathematical modeling
UR - http://www.scopus.com/inward/record.url?scp=85100630576&partnerID=8YFLogxK
U2 - 10.3920/978-90-8686-891-9_154
DO - 10.3920/978-90-8686-891-9_154
M3 - Article
AN - SCOPUS:85100630576
SN - 0071-2477
VL - 138
SP - 481
EP - 482
JO - EAAP Scientific Series
JF - EAAP Scientific Series
ER -