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. 
Bayne, K. A., Beaver, B. V., Mench, J. A. et al. 2015. Laboratory animal behavior. In: Laboratory Animal Medicine, 3rd edition. Fox, J. G., Anderson, L., Otto, G., et al. (eds). Elsevier, Inc., Amsterdam, NL. pp. 1617-1651.

The study of laboratory animal behavior has increased steadily over the last decade, with expanding emphasis on a variety of commonly used species. In the United States, this trend was initially focused on species for...

Modarressie, R., Gunther, C., Bakker, T. 2015. UV deprivation influences social UV preference in juvenile sticklebacks. Animal Behavior and Cognition 2(2), 186–199.

Social aggregations occur in many different animal taxa and mainly result from non-random assortment. Investigating factors that shape and maintain the composition of social aggregations are among others a main topic for understanding ecological speciation...

Hedrick, C., Rowley, M., Lewis, S. 2014. Repurposing and recycling an institutionally retired enrichment device. American Association for Laboratory Animal Science [AALAS] Meeting Official Program, 564 (Abstract #P56).

One aspect of maintaining and updating an environmental enrichment program is regular review of enrichment devices and their current uses. The review includes maintaining an accurate inventory to reflect the animal census, evaluating species-specific use...

Hesse, S., Thunken, T. 2014. Growth and social behavior in a cichlid fish are affected by social rearing environment and kinship. Naturwissenschaften 101, 273-283.

Living in groups is a widespread phenomenon in many animal taxa. The reduction of predation risk is thought to be an important cause for the formation of groups. Consequently, grouping behavior is particularly pronounced during...

Bayne, K. 2014. A historical perspective on social housing. Enrichment Record 18, 8-11.

The ever-broadening scope of social housing of research animals is increasingly encompassing the diversity of species used in research, including dogs, cats, rabbits, a variety of rodent species, agricultural animals, aquatic animals, and others.The Guide's...

Rushen, J., de Passillé, A. M., Appleby, M. C. et al. 2014. Alone or together: A risk assessment approach to group housing. In: Dilemmas in Animal Welfare. Appleby, M. C., Weary, D. M., Sandøe, P. (eds), 169-187. CAB International, Oxfordshire, UK.

The question of whether it is better to house animals in groups rather than alone deals with the unresolved issues at the heart of animal welfare. In particular, we need to be able to rank...

van Leeuwen, E. J. C., Mulenga, I. C., Chidester, D. L. 2014. Early social deprivation negatively affects social skill acquisition in chimpanzees (Pan troglodytes). Animal Cognition 17(2), 407–414.

In a highly social species like chimpanzees, the process by which individuals become attuned to their social environment may be of vital importance to their chances of survival. Typically, this socialization process, defined by all...

Bergman, T. J., Sheehan, M. J. 2013. Social knowledge and signal in primates. American Journal of Primatology 75(7), 683-694.

Primates are notable for having a rich and detailed understanding of their social environment and there has been great interest in the evolution and function of social knowledge in primates. Indeed, primates have been shown...

Reinhardt, V. (ed.) 2013. Compassion Makes a Difference - Discussions by the Laboratory Animal Refinement & Enrichment Forum [LAREF], Volume III. Animal Welfare Institute, Washington, DC.

This is the third volume of discussions that took place on the Laboratory Animal Refinement & Enrichment Forum (LAREF). This forum is dedicated to the exchange of personal experiences of refining the conditions under which...

Camacho, J. N., Boskovic, S., Moeller, E. 2012. Improved nonhuman primate social housing using visual cues associated for an intensive research study. American Association for Laboratory Animal Science [AALAS] Meeting Official Program, 636-637 (Abstract #PS35).

Lean management-based visual tools have been used to improve the quality of animal care associated with a complex research study involving immune-compromised cynomolgus monkeys (M. fascicularis) in various postsurgical recovery states. In order to effectively...

Baker, K. C. 2012. Implementation of pair housing for laboratory primates. American Journal of Primatology 74(S1), 31. (35th Meeting of the American Society of Primatologists Scientific Program, Abstract #20)

There is a general consensus among those studying the welfare of captive primates that social housing is the most effective means for promoting psychological well-being. It is well established that socially-housed rhesus macaques (Macaca mulatta)...

Schapiro, S. J., Bernacky, B. J. 2011. Socialization strategies and disease transmission in captive colonies of nonhuman primates. American Journal of Primatology 74(6), 518-527.

In captive research environments for nonhuman primates (NHP), social housing strategies are often in conflict with protocols designed to minimize disease transmission. This is particularly true in breeding colonies, and is especially relevant when attempting...

Williams, R. C., Nash, L. T., Scarry, C. J. et al. 2010. Factors affecting wounding aggression in a colony of captive chimpanzees (Pan troglodytes). Zoo Biology 29(3), 351-364.

Previous research has suggested that chimpanzees (Pan troglodytes) display higher levels of aggression in captivity than in the wild. One of the challenges of captive management, therefore, is to balance the chimpanzees' need for social...

National Research Council. 2009. Recognition and Alleviation of Pain in Laboratory Animals. The National Academies Press: Washington, DC, 198 pp.

Recognition and Alleviation of Pain in Laboratory Animals, the second of two reports revising the 1992 publication Recognition and Alleviation of Pain and Distress in Laboratory Animals from the Institute for Laboratory Animal Research (ILAR)...

Van Loo, P., Skoumbourdis, E., Reinhardt, V. 2006. Postsurgical pairing: A discussion by the Refinement & Enrichment Forum. Animal Technology and Welfare 5(1), 17-19.

Our experience-based discussion suggests that social animals benefit from compatible companionship during post-operative recovery. The traditional practice of keeping animals alone in an unfamiliar environment after surgery increases the subjects surgery-associated stress. Providing a familiar...

Lutz, C. K., Novak, M. 2005. Environmental enrichment for nonhuman primates: Theory and application. ILAR Journal 46(2), 178-191.

Only social contact satisfies the goal of promoting a wide variety of species-typical activities while at the same time reducing or preventing the development of abnormal behavior... A number of toys should be provided initially...

Kulpa-Eddy, J. A., Taylor, S., Adams, K. M. 2005. USDA perspectives on environmental enrichment for animals. ILAR Journal 46(2), 83-94.

This article provides a brief historical background of the events and circumstances that led to the 1985 Animal Welfare Act (AWA) amendments. It describes the development of the regulations promulgated by the US Department of...

Bloomsmith, M. A., Else, J. G. 2005. Behavioral management of chimpanzees in biomedical research facilities. ILAR Journal 46(2), 192-201.

The current status of the behavioral management of chimpanzees housed in US research facilities is examined, and recent advances are described. Behavioral management includes the application of environmental enrichment, animal training, and environmental design for...

Bayne, K. 2005. Potential for unintended consequences of environmental enrihment for laboratory animals and research results. ILAR Journal 46(2), 129-139.

Many aspects of the research animal's housing environment are controlled for quality and/or standardization. Of recent interest is the potential for environmental enrichment to have unexpected consequences such as unintended harm to the animal, or...

Woolley, A. P. A. H. 1997. Requirements of biomedical research in terms of housing and husbandry for non-human primates: Pharmacology & Toxicology. Primate Report 49, 37-41.

The objective of toxicology and pharmacology studies is to detect change or variation from normal and to interpret the significance of such change, with the intention of assessing risk to man. With non-human primates (NHPs)...

Warniment, A., Brent, L. 1997. Abnormal behavior in a captive chimpanzee colony. The Newsletter 8(3), 1-3.

The purpose of this study was to link abnormal behaviors often expressed by chimpanzees living in captive environments to factors related to their care and housing. Individuals who had spent more time with their mothers...

Sambrook, T. D., Buchanan-Smith, H. M. 1997. Control and complexity in novel object enrichment. Animal Welfare 6(3), 207-216.

We discuss the properties of controllability and complexity in novel object enrichment, their definition and present a critique of previous work related to them.

Brent, L. 1995. Improving the laboratory environment for nonhuman primates. Animal Welfare Institute (AWI) Quarterly 44(1), 14-15.

Environmental improvements include construction of large indoor cages that allow pairing of experimental animals, a grass-covered 'playground' for breeding chimpanzee groups, and indoor/outdoor group housing for 'retired' experimental animals. In addition, we provide toys, perches...

van Akker, R., Balls, M., Eichberg, J. W. et al. 1994. Chimpanzees in AIDS research: A biomedical and bioethical perspective. Journal of Medical Primatology 23, 49-51.

The present article represents a consensus view of the appropriate utilization of chimpanzees in AIDS research arrived at as a result of a meeting of a group of scientists involved in AIDS research with chimpanzees...

Fouts, R. S., Fouts, D. H., Jensvold, M. L. A. et al. 1994. An enriching approach to captive chimpanzee care. In Touch 1(1), 1 & 4-8.

The social environment [which includes the care providers] is perhaps the most critical factor in chimpanzee well-being, more important even than designs of the living space.