A structural equation model to analyze energy utilization in lactating dairy cows

L.E. Moraes; A.B. Strathe; E. Kebreab; D.P. Casper; J. Dijkstra; J. France; J.G. Fadel

doi:10.3920/978-90-8686-781-3_114

A structural equation model to analyze energy utilization in lactating dairy cows

L.E. Moraes, A.B. Strathe, E. Kebreab, D.P. Casper, J. Dijkstra, J. France, J.G. Fadel

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › Academic › peer-review

Abstract

Energy balance trials from lactating cows have traditionally been analyzed using the regression approach. However, univariate analysis of mutually interacting animal traits can provide biased parameter estimates if one trait is used as an explanatory variable to model a second trait and the sub-model of the first trait is ignored (Gianola and Sorensen, 2004). Moreover, multivariate methods should be preferred because animal responses are correlated and relationships among responses can be quantified through the use of structural equations. Furthermore, the US current energy evaluation system of dairy cattle (NRC, 2001) relies on energetic parameters from the 1960’s but over the past decades genetic improvement of dairy cattle has substantially increased the ability of cows to produce milk. The objective of the present study was to analyze energy utilization in lactating cows using structural equations.

Original language	English
Title of host publication	Proceedings of the 4th International Symposium on Energy and Protein Metabolism and Nutrition, 9-12 September 2013, Sacramento, California, USA
Editors	J.W. Oltjen, E. Kebreab, H. Lapierre
Place of Publication	Wageningen
Publisher	Wageningen Academic Publishers
Pages	327-328
Volume	134
ISBN (Print)	9789086862276
DOIs	https://doi.org/10.3920/978-90-8686-781-3_114
Publication status	Published - 2013
Event	4th International Symposium on Energy and Protein Metabolism and Nutrition, Sacramento, California, USA - Duration: 9 Sept 2013 → 12 Sept 2013

Conference/symposium

Conference/symposium	4th International Symposium on Energy and Protein Metabolism and Nutrition, Sacramento, California, USA
Period	9/09/13 → 12/09/13

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10.3920/978-90-8686-781-3_114

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Moraes, L. E., Strathe, A. B., Kebreab, E., Casper, D. P., Dijkstra, J., France, J., & Fadel, J. G. (2013). A structural equation model to analyze energy utilization in lactating dairy cows. In J. W. Oltjen, E. Kebreab, & H. Lapierre (Eds.), Proceedings of the 4th International Symposium on Energy and Protein Metabolism and Nutrition, 9-12 September 2013, Sacramento, California, USA (Vol. 134, pp. 327-328). Wageningen Academic Publishers. https://doi.org/10.3920/978-90-8686-781-3_114

Moraes, L.E. ; Strathe, A.B. ; Kebreab, E. et al. / A structural equation model to analyze energy utilization in lactating dairy cows. Proceedings of the 4th International Symposium on Energy and Protein Metabolism and Nutrition, 9-12 September 2013, Sacramento, California, USA. editor / J.W. Oltjen ; E. Kebreab ; H. Lapierre. Vol. 134 Wageningen : Wageningen Academic Publishers, 2013. pp. 327-328

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title = "A structural equation model to analyze energy utilization in lactating dairy cows",

abstract = "Energy balance trials from lactating cows have traditionally been analyzed using the regression approach. However, univariate analysis of mutually interacting animal traits can provide biased parameter estimates if one trait is used as an explanatory variable to model a second trait and the sub-model of the first trait is ignored (Gianola and Sorensen, 2004). Moreover, multivariate methods should be preferred because animal responses are correlated and relationships among responses can be quantified through the use of structural equations. Furthermore, the US current energy evaluation system of dairy cattle (NRC, 2001) relies on energetic parameters from the 1960{\textquoteright}s but over the past decades genetic improvement of dairy cattle has substantially increased the ability of cows to produce milk. The objective of the present study was to analyze energy utilization in lactating cows using structural equations.",

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Moraes, LE, Strathe, AB, Kebreab, E, Casper, DP, Dijkstra, J, France, J & Fadel, JG 2013, A structural equation model to analyze energy utilization in lactating dairy cows. in JW Oltjen, E Kebreab & H Lapierre (eds), Proceedings of the 4th International Symposium on Energy and Protein Metabolism and Nutrition, 9-12 September 2013, Sacramento, California, USA. vol. 134, Wageningen Academic Publishers, Wageningen, pp. 327-328, 4th International Symposium on Energy and Protein Metabolism and Nutrition, Sacramento, California, USA, 9/09/13. https://doi.org/10.3920/978-90-8686-781-3_114

A structural equation model to analyze energy utilization in lactating dairy cows. / Moraes, L.E.; Strathe, A.B.; Kebreab, E. et al.
Proceedings of the 4th International Symposium on Energy and Protein Metabolism and Nutrition, 9-12 September 2013, Sacramento, California, USA. ed. / J.W. Oltjen; E. Kebreab; H. Lapierre. Vol. 134 Wageningen: Wageningen Academic Publishers, 2013. p. 327-328.

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › Academic › peer-review

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AB - Energy balance trials from lactating cows have traditionally been analyzed using the regression approach. However, univariate analysis of mutually interacting animal traits can provide biased parameter estimates if one trait is used as an explanatory variable to model a second trait and the sub-model of the first trait is ignored (Gianola and Sorensen, 2004). Moreover, multivariate methods should be preferred because animal responses are correlated and relationships among responses can be quantified through the use of structural equations. Furthermore, the US current energy evaluation system of dairy cattle (NRC, 2001) relies on energetic parameters from the 1960’s but over the past decades genetic improvement of dairy cattle has substantially increased the ability of cows to produce milk. The objective of the present study was to analyze energy utilization in lactating cows using structural equations.

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Moraes LE, Strathe AB, Kebreab E, Casper DP, Dijkstra J, France J et al. A structural equation model to analyze energy utilization in lactating dairy cows. In Oltjen JW, Kebreab E, Lapierre H, editors, Proceedings of the 4th International Symposium on Energy and Protein Metabolism and Nutrition, 9-12 September 2013, Sacramento, California, USA. Vol. 134. Wageningen: Wageningen Academic Publishers. 2013. p. 327-328 doi: 10.3920/978-90-8686-781-3_114

A structural equation model to analyze energy utilization in lactating dairy cows

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