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The effects of witnessing managemental procedures during the light versus the dark phase of the light cycle on behaviour, performance and welfare of laboratory rats

By U. A. Abou-Ismail, R. A. Mohamed, S. Z. El-Kholya

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Abstract

Research has indicated that witnessing managemental procedures are stressful to laboratory rats. Yet there has been little investigation into whether the time of witnessing these procedures affects behaviour and welfare in these animals. Ninety-six rats, representing two batches, were used in this study. Forty-eight of them were housed, in groups of four, in either light phase witnessing group (LPWG) ( n=6) or dark phase witnessing group (DPWG) ( n=6) for five consecutive weeks. The remaining 48 rats were exposed to the managemental procedures (e.g. weighing, cage cleaning, restraint and vehicle injection) in either the light or the dark phase of the light/dark cycle, and were also housed in groups of four. At the beginning of the 5th week of the housing period, behaviour for all cages was sampled over the 1st 4 h of both the light and dark phases of the light/dark cycle. Physiological (e.g. body weight) and pathological (e.g. thymus and spleen weight) measures were collected at the end of the 5th week of the housing period. Principal component analyses yielded six factors, four of which revealed significant treatment differences. For the first, loaded positively on the body weight of animals, and negatively on relative weight of the adrenal gland, rats of the DPWG scored higher than those of the LPWG ( P

Publication Title Applied Animal Behaviour Science
Volume 162
Pages 47-57
ISBN/ISSN 0168-1591
Publisher Elsevier
DOI 10.1016/j.applanim.2014.11.005
Language English
Author Address Department of Husbandry and Development of Animal Wealth, Faculty of Veterinary Medicine, Mansoura University, P.O. Box 35516, Gomhoria St., Mansoura, Egypt.usamaa71@hotmail.com
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Tags
  1. Adrenal glands
  2. Animal behavior
  3. Animal housing
  4. Animal nutrition
  5. Animal physiology
  6. Animals
  7. Animal science
  8. Animal welfare
  9. Body
  10. Body weight
  11. Cages
  12. Cleaning
  13. Diseases and injuries of animals
  14. Effect
  15. Feeding
  16. Laboratories
  17. Laboratory and experimental animals
  18. Mammals
  19. organs
  20. pathology
  21. peer-reviewed
  22. Rats
  23. restraint
  24. Rodents
  25. sleep
  26. Stress
  27. vertebrates
  28. welfare
Badges
  1. peer-reviewed