Dynamic monitoring of weight data at the pen vs at the individual level

Dan Jensen, Nils Toft, A. R. K. Kristensen, Cecile Cornou

    Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

    Abstract

    The PigIT project, led by the University of Copenhagen, aims at improving welfare and productivity in growing pigs using ICT methods. Automatically and manually recorded data are currently being collected in a production herd. One of the first steps of the project is to make use of the manually recorded weight data from finisher pigs. Data are collected at insertion and at the exit of the first pigs in the pen, and in few pens, the weight is recorded weekly. Dynamic linear models are fitted on the weight data, at the pig level (univariate), at the double pen level using averaged weight (univariate) and using individual pig values as parameters in a hierarchical (multivariate) model including section, double pen, and individual level. Variance components of the different models are estimated using the Expectation Maximization algorithm. The difference of information obtained at the individual vs pen level is thereafter assessed. Whereas weight data is usually monitored after a batch is being sent to the slaughter house, this method provides weekly updating of the data. Perspectives of application include dynamic monitoring of weight data in relation to events such as diarrhoea, tail biting and fouling in order to assess whether it is possible to detect deviations of patterns before or during the occurrence of these events.
    Original languageEnglish
    Publication date2014
    Number of pages1
    Publication statusPublished - 2014
    Event65th Annual meeting of the European Federation of Animal Science - Copenhagen, Denmark
    Duration: 25 Aug 201429 Aug 2014

    Conference

    Conference65th Annual meeting of the European Federation of Animal Science
    CountryDenmark
    CityCopenhagen
    Period25/08/201429/08/2014

    Cite this

    Jensen, D., Toft, N., Kristensen, A. R. K., & Cornou, C. (2014). Dynamic monitoring of weight data at the pen vs at the individual level. Abstract from 65th Annual meeting of the European Federation of Animal Science, Copenhagen, Denmark.