Refinement Database

Database on Refinement of Housing, Husbandry, Care, and Use of Animals in Research

This database, created in 2000, is updated every four months with newly published scientific articles, books, and other publications related to improving or safeguarding the welfare of animals used in research.

Tips for using the database:

  • This landing page displays all of the publications in the database.
  • Use the drop-down menus to filter these publications by Animal Type, Setting, and/or Topic.
  • Clicking on a parent category (e.g., Rodent) will include publications relating to all the items in that category (e.g., Chinchilla, Gerbil, Guinea Pig, etc.).
  • You may also add a keyword to further narrow your search.
  • Please note that at this time, only publications dated 2010 or later (with some exceptions) can be filtered by Animal Type and Topic, and only publications dated 2020 or later (with some exceptions) can be filtered by Setting. Most publications older than 2010 can only be searched by keyword. 
Volkmann, J. L., Evans, C. A., Buckmaster, C. 2018. Pigeons: Flying to new heights. Laboratory Animal Science Professional 6(1) (March), 33-34.

When singly or pair housed in cages, pigeons have a relatively small area in which to walk and stretch or flap their wings. More space is required to allow pigeons to be housed in numbers...

Unakafov, A. M., Möller, S., Kagan, I. et al. 2018. Using imaging photoplethysmography for heart rate estimation in non-human primates. PLOS ONE 13(8), e0202581.

For humans and for non-human primates heart rate is a reliable indicator of an individual’s current physiological state, with applications ranging from health checks to experimental studies of cognitive and emotional state. In humans, changes...

Cronin, K. A., Bethell, E. J., Jacobson, S. L. et al. 2018. Evaluating mood changes in response to anthropogenic noise with a response-slowing task in three species of zoo-housed primates. Animal Behavior and Cognition 5(2), 209–221.

In the zoo environment, anthropogenic noise is common as sound levels fluctuate due to visitors, construction, habitat design, and special events. In this study, changes in the mood of three species of zoo-housed primates in...

Krebs, B. L., Torres, E., Chesney, C. et al. 2017. Applying behavioral conditioning to identify anticipatory behaviors. Journal of Applied Animal Welfare Science 20(2), 155-175.

The ability to predict regular events can be adaptive for nonhuman animals living in an otherwise unpredictable environment. Animals may exhibit behavioral changes preceding a predictable event; such changes reflect anticipatory behavior. Anticipatory behavior is...

Martin, A. L. 2017. Theprimatologist as a behavioral engineer. American Journal of Primatology 79, e22500.

The field of primate behavior management has had only limited success in preventing and treating abnormal behaviors, such as stereotypy and self‐injury, in captive non‐human primates (NHP). In contrast, applied behavior analysts have had great...

Palmer, S. 2017. Rescue-Enrich-Release: The environmental enrichment program for three species of captive primates at Colobus. Canopy 17(2), 27-30.

It is widely known that the psychological wellbeing of captive animals can become compromised by a captive environment that lacks proper environmental stimulation. Environmental enrichment programs have become the norm in captive environments yet research...

Nelson Slater, M., Hauber, M. E. 2017. Olfactory enrichment and scent cue associative learning in captive birds of prey. Zoo Biology 36(2), 120–126.

As the use of enrichment in zoos has become a standardized husbandry practice, the continued improvement of enrichment programs should be concomitant with empirical validation of those practices. The role of scent as enrichment remains...

Carlson, A., Allen, C., Skoumbourdis, E. et al. 2017. Cooked food for non-human primates: A discussion by the Laboratory Animal Refinement & Enrichment Forum. Animal Technology and Welfare 16(2), 124-126.

"Do any of you give cooked food like pasta, potatoes or vegetables to non-human primates? What’s your experience? Do the animals benefit from cooked food; do they like it; does it affect their health in...

Lalot, M., Ung, D., Péron, F. et al. 2017. You know what? I’m happy. Cognitive bias is not related to personality but is induced by pair-housing in canaries (Serinus canaria). Behavioural Processes 134, 70-77.

Recent studies suggest that cognitive bias could constitute a novel and valid measure of animal welfare. Although interest for a link between personality and cognition is growing, no study to date investigated whether a cognitive...

Coleman, K., Novak, M. A. 2017. Environmental enrichment in the 21st century. ILAR Journal 58(2), 295-307.

More than a quarter of a century has elapsed since the Animal Welfare Act mandated that research facilities develop and follow a plan to promote the psychological well-being of captive primates. Since passage of this...

McMillan, J. L., Bloomsmith, M. A., Prescott, M. J. 2017. An international survey of approaches to chair restraint of nonhuman primates. Comparative Medicine 67(5), 442–451.

Specifically designed restraint chairs are the preferred method of restraint for research studies that require NHP to sit in place for sustained periods of time. In light of increasing emphasis on refinement of restraint to...

Cooke, G. M. 2017. Stereotypic behavior is not limited to terrestrial taxa: A response to Rose et al. Journal of Veterinary Behavior 22, 17-18.

This comment is in response to a recent review of stereotypical behavior in captive exotic animals (Rose et al., 2017). Negative stereotypical behavior occurs across most if not all taxa, including notable aquatic invertebrates. A...

Sands, C., Evans, C., Buckmaster, C. A. 2017. The grooming sleeve: Encouraging conspecific-like behavior and strengthening the human-animal bond. Laboratory Animal Science Professional 5(2) (June), 52-53.

The act of grooming has been found to greatly decrease stress, heart rate, and cortisol levels in nonhuman primates; this decrease in stress and cortisol is seen in the animal being groomed, as well as...

Koch, C. S., Ballantyne, K. C., Tynes, V. V. et al. 2017. Training Rhea americana chicks to walk voluntarily across a scale; effect on the handler's time and the chicks' weight gain compared with traditional techniques: A pilot study. Journal of Veterinary Behavior 18, 69-75.

The purpose of this pilot study was to determine if Rhea americana chicks could be trained to walk voluntarily across a scale to be weighed. If the chicks were trainable, the following questions would be...

Cooper, J. E., Hull, G. 2017. Gorilla Pathology and Health: With a Catalogue of Preserved Materials. Elsevier/Academic Print, London, UK.

Gorilla Pathology and Health: With a Catalogue of Preserved Materials consists of two cross-referenced parts. The first, the book itself, is a review of pathological changes and tissue responses in gorillas (Gorilla gorilla and G...

Tolpinrud, A., O’Brien, M. F., Justice, W. S. M. et al. 2017. Infrared thermography as a diagnostic tool for pododermatitis in captive greater flamingos (Phoenicopterus roseus). Journal of Zoo and Aquarium Research 5(1), 48-55.

This cross-sectional study investigated the use of infrared thermography as a diagnostic tool for pododermatitis in captive greater flamingos (Phoenicopterus roseus). Photographs and thermal images were obtained for 775 feet from 408 flamingos held at...

Liedtke, J., Schneider, J. M. 2017. Social makes smart: Rearing conditions affect learning and social behaviour in jumping spiders. Animal Cognition 20(6), 1093–1106.

There is a long-standing debate as to whether social or physical environmental aspects drive the evolution and development of cognitive abilities. Surprisingly few studies make use of developmental plasticity to compare the effects of these...

Schlüns, H., Welling, H., Federici, J. R. et al. 2017. The glass is not yet half empty: Agitation but not Varroa treatment causes cognitive bias in honey bees. Animal Cognition 20(2), 233–241.

Honey bees (Apis mellifera) are prone to judge an ambiguous stimulus negatively if they had been agitated through shaking which simulates a predator attack. Such a cognitive bias has been suggested to reflect an internal...

de Groot, B., Cheyne, S. M. 2016. Does mirror enrichment improve primate well-being? Animal Welfare 25(2), 163-170.

Primates are highly social animals and appropriate enrichment is required to ensure their psychological well-being. Mirrors are sometimes used as social or sensory environmental enrichment. In this paper we investigate the suitability of mirrors as...

Wallace, P. Y., Asa, C. S., Agnew, M. et al. 2016. A review of population control methods in captive-housed primates. Animal Welfare 25(1), 7-20.

The success of breeding primates in captivity has led to a surplus number of animals in collections. This review examines published journals and key books to investigate the various methods of primate population control. Hormonal...

Ross, S. R., Shender, M. A. 2016. Daily travel distances of zoo-housed chimpanzees and gorillas: Implications for welfare assessments and space requirements. Primates 57(3), 395-401.

The degree to which the relatively smaller area of artificial environments (compared with natural habitats) has measureable effects on the behavior and welfare of captive animals has been debated for many years. While there is...

Wark, J. D., Amendolagine, L., Lukas, K. E. et al. 2016. Fecal glucocorticoid metabolite responses to management stressors and social change in four species of callitrichine monkeys. Primates 57(2), 267-277.

The use of enzyme immunoassays (EIA) for the non-invasive measurement of glucocorticoids provides a valuable tool for monitoring health and welfare in sensitive species. We validated methods for measuring fecal glucocorticoid metabolites (FGM) using the...

Brooker, J. S. 2016. An investigation of the auditory perception of western lowland gorillas in an enrichment study. Zoo Biology 35(5), 398-408.

Previous research has highlighted the varied effects of auditory enrichment on different captive animals. This study investigated how manipulating musical components can influence the behavior of a group of captive western lowland gorillas (Gorilla gorilla...

O'Keefe, S. 2016. Non-human primate housing facility at Newcastle University. Animal Technology and Welfare 15(2), 131-132.

Monkeys first arrived in the Comparative Biology Centre (CBC) at Newcastle University in 2000. They were housed in three small separate units consisting of steel and wooden cages. In 2011 a decision was made to...

Sullivan, K., Fairn, E., Adamo, S. A. 2016. Sickness behaviour in the cricket Gryllus texensis: Comparison with animals across phyla. Behavioural Processes 128, 134-143.

Immune activation alters behaviour (i.e. sickness behaviour) in animals across phyla and is thought to aid recovery from infection. Hypotheses regarding the adaptive function of different sickness behaviours (e.g. decreased movement and appetite) include the...