2010
DOI: 10.2527/jas.2009-2065
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A multivariate nonlinear mixed effects method for analyzing energy partitioning in growing pigs1

Abstract: Simultaneous equations have become increasingly popular for describing the effects of nutrition on the utilization of ME for protein (PD) and lipid deposition (LD) in animals. The study developed a multivariate nonlinear mixed effects (MNLME) framework and compared it with an alternative method for estimating parameters in simultaneous equations that described energy metabolism in growing pigs, and then proposed new PD and LD equations. The general statistical framework was implemented in the NLMIXED procedure… Show more

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Cited by 21 publications
(32 citation statements)
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“…A useful growth function should describe data well and contain biologically and physically meaningful parameters (France et al, 1996a). Attributes quantified using growth functions include protein deposition (Strathe et al, 2010a), body weight (Porter et al, 2010), and mineral deposition . López (2008) reviewed various nonlinear functions used in animal nutrition to represent time-dependent processes and events, and examined current and potential use of these functions to describe response to nutrients.…”
Section: Introductionmentioning
confidence: 99%
“…A useful growth function should describe data well and contain biologically and physically meaningful parameters (France et al, 1996a). Attributes quantified using growth functions include protein deposition (Strathe et al, 2010a), body weight (Porter et al, 2010), and mineral deposition . López (2008) reviewed various nonlinear functions used in animal nutrition to represent time-dependent processes and events, and examined current and potential use of these functions to describe response to nutrients.…”
Section: Introductionmentioning
confidence: 99%
“…The option OPTCHECK was used to check the neighborhood of the likelihood function to ensure that the optimization had fomid a global minimum. Details of fitting MNLME models are described in detail by Strathe et al (2010).…”
Section: Muitivariate Statisticai Anaiysismentioning
confidence: 99%
“…[2] and [3]; Noblet et al, 1990;Strathe et al, 2010). Empty BW (EBW) and body composition were estimated using equations (Eq.…”
Section: Gestation Modulementioning
confidence: 99%
“…The efficiency coefficients k p and k f determined by Noblet et al (1990) and Strathe et al (2010) for growing pigs are parameters that have an influence on prediction of fat deposition. The BW and composition of sows has changed during the last 20 to 30 yr, which may have caused changes in protein and fat metabolism and efficiencies of dietary ME utilization.…”
Section: Sensitivity Analysismentioning
confidence: 99%