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dc.contributor.authorMunsterhjelm, Camilla
dc.contributor.authorNordgreen, Janicke
dc.contributor.authorAae, Frida
dc.contributor.authorHeinonen, Mari
dc.contributor.authorValros, Anna
dc.contributor.authorJanczak, Andrew M.
dc.description.abstractPoor health is associated with an increased risk of tail biting outbreaks in pigs. We propose that this is because illness changes social dynamics either by changing the behaviour of the sick pig towards its penmates, the behaviour of the healthy penmates towards the sick pig, or both. We tested the effect of immune stimulation (lipopolysaccharide (LPS) injection: O111:B4; 1.5 μg kg−1 IV) on social behaviour in gilts housed in triplets in a cross-over experiment. Each pen was subjected to the control treatment (all three pigs injected with saline) and then LPS treatment (one pig injected with LPS, two injected with saline), or vice versa. LPS injected pigs had a shift in social motivation and performed more tail- and ear- directed behaviour than saline pigs two days after injection. They seemed to fit the description of ‘sick and grumpy’. This change was seen about 40 h after the signs of acute illness dissipated and was not accompanied by a similar increase in activity. We discuss possible mechanisms for this behavioural change in light of changes in neurotransmitter levels at three days after LPS injection described in a previous experiment.nb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.titleSick and grumpy: Changes in social behaviour after a controlled immune stimulation in group-housed gilts.nb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.source.journalPhysiology and Behaviornb_NO
dc.relation.projectAndre: Finnish Ministry of Agriculture and Forestry 1697/312/2014nb_NO
dc.relation.projectAndre: Finnish Ministry of Agriculture and Forestry 1564/311/2013nb_NO
dc.relation.projectNorges forskningsråd: 236518nb_NO
cristin.unitnameInstitutt for mattrygghet og infeksjonsbiologi
cristin.unitnameInstitutt for produksjonsdyrmedisin

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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal