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The lower row monkey cage: an overlooked variable in biomedical research

By V. Reinhardt, A. Reinhardt

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A survey of 96 primatological articles revealed that cage location of research monkeys is rarely mentioned, although the environment of upper and lower row-housed animals markedly differs in terms of light quality, light intensity, and living dimension. Not accounting for these uncontrolled variables may increase variability of data and, consequently, the number of experimental animals needed to obtain statistically acceptable results. This study concluded that single-tier housing would be an important refinement of research methodology. Such housing would (a) enable all animals of a room to use the "arboreal" dimension of their enclosure and retreat to "safe" vantage points above the human "predator," (b) offer all animals access to uniform light, and (c) provide more favourable conditions for professional animal care.

Publication Title Journal of Applied Animal Welfare Science
Volume 3
Issue 2
Pages 141-149
ISBN/ISSN 1088-8705 (Print), 1532-7604 (Online)
Publisher Taylor & Francis
DOI 10.1207/S15327604JAWS0302_6
Language English
Author Address Animal Welfare Institute, Washington, DC, USA.
Cite this work

Researchers should cite this work as follows:

  1. Animal experimentation
  2. Animal housing
  3. Animal research
  4. Animal rights
  5. Animals
  6. Animal welfare
  7. Cages
  8. Laboratory and experimental animals
  9. Laboratory animal science
  10. Mammals
  11. Methodologies
  12. Methods
  13. Monkeys
  14. peer-reviewed
  15. Primates
  16. Research
  17. Studies
  18. vertebrates
  1. peer-reviewed