• Aucun résultat trouvé

A model to induce cannibalism outbreak on pigs based on frustration of exploratory behaviour

N/A
N/A
Info
Télécharger
Protected

Academic year: 2021

Partager "A model to induce cannibalism outbreak on pigs based on frustration of exploratory behaviour"

Copied!
1
0
0

Chargement.... (Voir le texte intégral maintenant)

Texte intégral

(1)

WAFL 2017 125

A model to induce cannibalism outbreak on pigs based on frustration of exploratory behaviour

Marie-Christine Meunier-Salaün

1

, Diana Quent

1

, Aurélie Thivat

2

and Valérie Courboulay

2

1

PEGASE Agrocampus Ouest INRA, France,

2

IFIP-Institut du Porc, France;

[email protected]

A model of cannibalism in pigs was built from the frustration of investigation, generated in two trials by the withdrawal from the fifth day of fattening period (FP) of the pen enrichment supplied during the post weaning period (PW). Three levels of enrichment were applied:

in Trial 1 (T1): slatted floors and progressive supply of chain-plastic pipe or cord (E-) vs no object (A) (12 pens/treatment: A vs E-); Trial 2 (T2): straw bedding (E+) vs slatted floor with progressive supply of objects (E-) (12 pens/treatment: E- vs E+). During the first four days of the FP, piglets had cords and plastic pipes (P) vs no material (A) (6 pens per treatment: T1:

A/A, A/P, E/A, and E-/P; T2: E-/A, E-/ P, E+/A, and E+/P). Behaviour was video recorded every 2 weeks during PW, then daily during the first four days and finally at Day 7 of the fattening period. The social interactions, tail biting, pen and object investigation performed in pens for two hours were submitted to variance analysis (Proc Mixed SAS). Tails and ears injuries were scored three times in PW and daily for the two first weeks in FP (χ2 test). During PW, enrichment promoted interest towards object (T1: 2% total scan for E- vs 0 for A; P<0.05), and more straw investigation compared to objects ones (T2: 23.2 for E+ vs 3.5% total scan for E-, P<0.05). No severe tail and ears lesions were observed in both trials. At Day 4 of FP, the withdrawal of objects did not strongly affected the behaviour, except in T2 showing more positive social interactions (33 for E-/A vs 23% total items for E-/P; P<0.05). Cannibalism outbreak was only limited to three pens in T2 (E+/A, E-/A, E-/P), and any case at Day 7, highlighting multifactorial causes of cannibalism.

Session 05 Poster 25

Références

Télécharger maintenant ( PDF - 1 Page - 150.11 KB )

Documents relatifs

Derivation of a homogenized two-temperature model from the heat equation

The purpose of this paper is to derive a model governing the exchange of heat in a composite medium consisting of a background material with very small spherical inclusions of

Genomic inbreeding coefficients based on the distribution of the length of runs of homozygosity in a closed line of Iberian pigs

Conclusions: Quantile and exponential probability inbreeding coefficients using ROH length as a random vari‑ able provide additional information about recent inbreeding compared

Frustration and helicity in the ordered phases of a discotic compound

To account for all degrees of freedom in the unit cell, we must include for each of the three columns a helical sign Hk, helical phase CPk’ and vertical

The nutritional cost of the immune response in pigs

The conference is designed for the animal health industry and the medical community; all users of antibiotics in animals, such as veterinarians, animal feed producers, livestock

Assessment of the dynamic growth of the fattening pigs from body weight measured daily and automatically to elaborate precision feeding strategies

Assessment of the dynamic growth of the fattening pigs from body weight measured daily and automatically to elaborate precision feeding strategies N..

CRITICAL BEHAVIOUR OF THE XY MODEL OF A FERROMAGNET

In any case the scaled values of the spin one half Ising and XY model indi- ces plus the linearity conjecture lead to predicted indices for the spin one half

Response of bedrock channel width to tectonic forcing: Insights from a numerical model, theoretical considerations and comparison with field data

said to be achieved when the channel geometry and hence the indicative channel response parameters (flow width, flow depth, bed slope, wetted perimeter, hydraulic radius and mean

Selektionsprozesse beim Übergang in die Sekundarstufe I und II = Selection processes in the transition to lower and upper secondary education

Wurden zusätzlich die Leistungen in Mathematik und Deutsch in der Gleichung berücksichtigt, wurden die Leistungen sowie die Noten in Deutsch, nicht aber in Mathematik, signifi