Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 450411
Title A structural equation model to analyze energy utilization in lactating dairy cows
Author(s) Moraes, L.E.; Strathe, A.B.; Kebreab, E.; Casper, D.P.; Dijkstra, J.; France, J.; Fadel, J.G.
Source In: Proceedings of the 4th International Symposium on Energy and Protein Metabolism and Nutrition, 9-12 September 2013, Sacramento, California, USA. - Wageningen : Wageningen Academic Publishers - ISBN 9789086862276 - p. 327 - 328.
Event Wageningen : Wageningen Academic Publishers - ISBN 9789086862276 4th International Symposium on Energy and Protein Metabolism and Nutrition, Sacramento, California, USA, 2013-09-09/2013-09-12
DOI https://doi.org/10.3920/978-90-8686-781-3_114
Department(s) Animal Nutrition
WIAS
Publication type Contribution in proceedings
Publication year 2013
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.
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