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Poster De Conférence Année : 2016

Feeding behaviour in dairy goats, a repeatable trait which can be measured automatically

Résumé

Feeding behaviour influences dry matter intake, but is highly variable between animals. It is a key factor to explain the interindividual variation in the evolution of rumen pH, and therefore of occurrence of acidosis which differs from one animal to another, even when fed the same diet. Phenotyping feeding behaviour is thus of interest for quantifying some of the variation in digestive efficiency, and therefore in feed efficiency, especially in intensive systems with a high proportion of acidogenic ingredients in the diet. The aim of this work was to look for repeatable and pertinent criteria to evaluate this trait. Feeding behaviour was assessed at three different periods (1st lactation, 2nd gestation + lactation, 2nd lactation) on thirty-five goats born at the same time. They were housed in individual crates with automatic measurement of the quantity of feed eaten every 2 min, and fed ad libitum a complete ration adapted to requirements. One third of the feed was delivered after the morning milking and two thirds after the afternoon milking according to the intervals between milkings. The evolution of feed intake during 15 hours after the afternoon allowance was measured on 3 or 4 days in each period. Two phenotypes were automatically measured and analysed: Q90 (quantity of diet consumed by 90 min post afternoon feed allowance), P90 (Q90/Total quantity of feed consumed after the afternoon feed allowance). In earlier work, these two parameters were highly linked with the occurrence of acidosis. Intra-period individual repeatabilities were very high. The value for one period was highly correlated with that of a preceding one for the P90 criteria, but only tended to be correlated for the Q90 criteria. Given this repeatability, it is possible to characterise the feeding behaviour of a goat during its first lactation and, for example, to adjust the feeding of the animals with the lowest P90 or Q90 in the following lactations, in order to decrease the occurrence of acidosis in the herd. These results on the variability of intake rate show that simple criteria could be found to phenotype goats on intake rate in precision livestock farming systems.
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Dates et versions

hal-01560689 , version 1 (03-06-2020)

Licence

Paternité - Partage selon les Conditions Initiales

Identifiants

  • HAL Id : hal-01560689 , version 1
  • PRODINRA : 391713

Citer

Sylvie Giger-Reverdin, Christine Duvaux-Ponter, Nicolas N.C. Friggens. Feeding behaviour in dairy goats, a repeatable trait which can be measured automatically. 4. DairyCare Conference, Oct 2016, Lisbonne, Portugal. 2016, Procceedings of the Fourth DairyCare Conference. Lifelong Sensing of Health and Welfare and Big Data and the Internet of Things. ⟨hal-01560689⟩
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