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Mathematical Model to Compare Egg Production C

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Author(s): Fialho FB | Ledur MC | Avila VS

Journal: Revista Brasileira de Ciência Avícola
ISSN 1516-635X

Volume: 3;
Issue: 3;
Start page: 211;
Date: 2001;
Original page

Keywords: Egg production | layers | laying hens | model

ABSTRACT
A segmented polynomial model was used on several egg production curves in an attempt to analyze the differences between the curves in a more descriptive manner. Production curves from different commercial and experimental genetic lines of layers were used. The parameters of the model include the age and level of peak production, rate of decrease in production after the peak and time between start and peak of production. These and other derived variables were compared between the curves using contrasts. The methodology used allowed an easier interpretation of the curves, and the detection of differences in sexual maturity, uniformity and peak of production. This work validates the segmented polynomial model for use in future research dealing with analysis of egg production curves.
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