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Patterns of daily food intake in growing pigs

Published online by Cambridge University Press:  02 September 2010

L. C. M. de Haer  and
J. W. M. Merks
L. C. M. de Haer
Affiliation:
Research Institute for Animal Production, (IVO-DLO) ‘Schoonoord’, PO Box 501, 3700 AM Zeist, The Netherlands
J. W. M. Merks
Affiliation:
Research Institute for Animal Production, (IVO-DLO) ‘Schoonoord’, PO Box 501, 3700 AM Zeist, The Netherlands
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Abstract

Food intake patterns of growing pigs given food ad libitum in individual and group housing were derived from food intake recordings with IVOG®-stations. The IVOG-station is a feeding station that records animal identification number, time, duration and amount of food intake during each visit of a pig to the food hopper. Data were collected in three testing batches of 90 Dutch Landrace pigs each, housed in 10 individual pens and in 10 group pens of eight pigs per batch.

Based on survival analysis theory, intervals between visits shorter than 5 min (which was used as meal criterion) were regarded as within-meal intervals and these visits were grouped into meals. In group housing, food intake per day and rate of food intake had no significantly non-normal distribution. In individual housing, rate of food intake, food intake per day and number of meals per day had no significantly non-normal distribution. In individual housing rate of food intake, food intake per day and number of meals per day had no significantly non-normal distribution. All traits were normally distributed after discarding extreme values, except food intake and eating time per visit and per meal. In group housing these traits were not significantly non-normally distributed after logarithmic transformation.

Pigs housed in groups ate faster, had a higher food intake per meal but less meals per day, less eating time per day and a lower daily food intake than pigs penned individually. During the day two peaks of feeding activity occurred, especially in group housing: one in the morning and one in the beginning of the afternoon.

A distinction was made between meals with a major contribution to daily food intake and meals of minor importance. In group housing, 69% of the daily number of meals accounted for proportionately 0·87 of daily food intake and 0·83 of daily food intake time. In individual housing 39% of the meals accounted for proportionately 0·90 of the daily food intake and 0·79 of the daily eating time.

Higher repeatabilities of day to day recordings of food intake traits, were found when estimated within 2-week periods compared with months or with the total fattening period.

Keywords

feeding habitsgroup effectpigs
Type
Research Article
Information
Animal Production , Volume 54 , Issue 1 , February 1992 , pp. 95 - 104
Copyright
Copyright © British Society of Animal Science 1992

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