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Interaction between sows’ aggressiveness post mixing and skin lesions recorded several weeks later

By Björn Tönepöhl, Anne K. Appel, Barbara Voß, Uta König von Borstel, Matthias Gauly

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Abstract

Group housing of pigs leads inevitably to more or less serious agonistic interactions during the establishment of the social rank order of the group. In order to reduce the number of severe agonistic interactions and thus the negative effects on well-being and performance, the use of genetic selection of calm sows maybe a possible strategy. Therefore, in this study the behaviour of 112 German Landrace sows was observed after the animals were brought together in a group of 10–20 sows. After this initial period, the sows were integrated into a large dynamic group in the dry sow area where the animals were housed for 71 days. Before moving the sows into the farrowing area, skin lesions scores for three body regions (front/middle/rear) on both sides were recorded using a scoring system from 1 (no lesions) to 4 (wounds, lesions all over the body area). After farrowing, sows’ reaction towards the separation from their litter was recorded to analyse relationships between aggressiveness and handling. Earlier research suggests that skin lesions recorded shortly after mixing are associated with agonistic interactions at mixing and might therefore be a useful indicator for the evaluation of recent aggressiveness of animals. However, results of the present study show that an individuals’ frequency of being initiator of agonistic interactions post mixing do not affect (p>0.1) the extent of skin lesion recorded 10 weeks later. Conversely, animals being attacked frequently were evaluated with higher scores in the anterior region (p=0.0435). These findings indicate that a higher skin lesion score does not represent generally more aggressive sows under commercial housing systems, but it is still an indicator for overall aggressiveness within pens or groups. Between the different groups significant differences in the extent of skin lesions were found (e.g. skin lesion score front: p=0.0228). A negative relationship was found between skin lesion score in caudal region and sows’ reaction towards stockperson when handling their piglets (r=−0.28, p

Date 2013
Publication Title Applied Animal Behaviour Science
Volume 144
Issue 3
Pages 108-115
ISBN/ISSN 0168-1591
DOI 10.1016/j.applanim.2013.01.004
Language English
Additional Language English
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Tags
  1. Aggression
  2. Animal behavior
  3. Animal genetics
  4. Animal housing
  5. Animal reproduction
  6. Animals
  7. Behavior and behavior mechanisms
  8. Diseases and injuries of animals
  9. Dog Breeds
  10. Effect
  11. Evaluation
  12. Farrowing
  13. Handling
  14. Interactions
  15. Land
  16. Lesions
  17. Mammals
  18. Meat animals
  19. Parasites
  20. peer-reviewed
  21. pens
  22. performance traits
  23. Pigs
  24. Reproduction
  25. skin
  26. sows
  27. Storage and Transport Equipment
  28. Suiformes
  29. Swine
  30. traits
  31. ungulates
  32. vertebrates
  33. Wounds and injuries