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. 
Depauw, S., Verbist, L., Stevens, J. et al. 2023. Feeding management of giraffe towards positive welfare. Journal of Zoo and Aquarium Research 11(4), 400–413.

This study prioritised positive affective states while modifying the feeding management of five giraffes at Zoo Planckendael and monitored the impact on indicators of both negative and positive welfare. Observations were conducted day and night...

English, H., Harvey, L., Wilson, R. et al. 2023. Multi-sensor biologgers and innovative training allow data collection with high conservation and welfare value in zoos. Journal of Zoo and Aquarium Research 11(1), 220–231.

Zoos are valuable resources for research, allowing scientists to observe rare and elusive species. Animal-attached loggers (biologgers) offer profound insight into animal behaviour. Their use in zoos has great yet largely untapped potential to collect...

Flewitt, A., Williams, L., Preziosi, R. et al. 2023. Tagging and location preferences to inform post-release monitoring of the Greater Bermuda land snail Poecilozonites bermudensis. Journal of Zoo and Aquarium Research 11(3), 345–349.

The Greater Bermuda land snail Poecilozonites bermudensis was once thought to be extinct in the wild, however, recent captive population increases have allowed reintroductions to take place. Post-release monitoring of reintroduced individuals is a fundamental...

Island, H. D., Smith, B., Winn, E. M. et al. 2023. A longitudinal study of parenting conditions on two adult, North American river otters’ (Lontra Canadensis) repetitive behavior. Journal of Applied Animal Welfare Science 26(1), 15–28.

Captive animal welfare research focuses on husbandry, enrichment, enclosure space, visitor effects, and opportunities for species-typical behavior (e.g., foraging, territoriality, and social interaction). And yet, one of the most biologically relevant opportunities for species-typical behavior...

Keeley, T., Ritky, K., Russell, T. 2023. A retrospective examination of factors associated with breeding success of Tasmanian devils in captivity (2006 to 2012). Journal of Zoo and Aquarium Research 11(1), 211–219.

The captive Tasmanian devil Sarcophilus harrisii insurance population was initiated in 2005 in response to rapid wild population declines due to a fatal, transmissible cancer. Wild-caught founders were sourced at the age of dispersal from...

Kleinlugtenbelt, C., Clauss, M., Burkevica, A. et al. 2023. Fasted and furious? Considerations on the use of fasting days in large carnivore husbandry. Journal of Zoo and Aquarium Research 11(3), 318–323.

Many large mammalian terrestrial carnivores do not hunt every day in their natural habitats, because given the right prey, they can gorge-feed more than their daily energy and nutrient requirements. At the same time, there...

Latini, L., Nascetti, G., Grignani, G. et al. 2023. Limited holding space reduces growth and behavioural performance in juvenile European lobsters. Applied Animal Behaviour Science 266, 106013.

Conservation aquaculture offers important tools to secure sustainable animal supplies for human use. However, intensive aquaculture practices are increasingly raising concerns about the welfare conditions of farmed animals, which typically face high mortality rates due...

Maganhe, B. L., Andrade, L. S., Camilo, L. de O. et al. 2023. Food-related substrate preference in juveniles seastar Echinaster (Othilia) brasiliensis (Müller & Troschel,1842) in captivity. Zoo Biology 42(5), 675–682.

There are only a few studies that describe the larval development of Echinaster or aspects on culture systems for the genus. For starfishes, the choice of suitable substrates has received special attention since it could...

Okabe, K., Fukuizumi, H., Kawamura, A. et al. 2023. An investigation of browsing enrichment, especially non-leaf foraging, on giraffes (Giraffa camelopardalis reticulata) at Kyoto City Zoo in Japan. Zoo Biology 42(1), 157–161.

Browsing enrichment may aid in developing species-specific behaviors for giraffes managed in zoos as a means of improving animal welfare. By nature, giraffes are tree-feeding animals, including tree bark, but the extent of food other...

Saito, M., Matsunaga, M., Fukuizumi, H. et al. 2023. Factors affecting captive female giraffe stress response: Male presence, small enclosure, and low temperature. Zoo Biology 42(5), 632–643.

To improve animal welfare based on suitable social housing conditions, it is important to understand the factors that trigger high-stress responses. Wild giraffes live in a fission–fusion society and males and females are rarely in...

Spain, M., Pearson, C., Rosenblatt, A. E. 2023. Social structure and habitat design affect the impact of a novel feeding enrichment for alligators. Zoo Biology 42(3), 383–389.

Providing enrichment that expands the range of behavioral opportunities associated with food acquisition and environmental exploration is an important contributing factor to the well-being of zoo animals. These behaviors can be difficult to promote in...

Trelfa-Stewart, E., Cox, L. 2023. Battle of the enrichments: Comparing the impact of nutritional and sensory enrichment on the behaviour of captive lowland tapirs Tapirus terrestris. Journal of Zoo and Aquarium Research 11(3), 336–344.

Environmental enrichment is used to improve the welfare of captive animals by providing increased environmental variety, the provision of choice, and the opportunity to develop competency. The efficacy of a range of environmental enrichment should...

Walldén, W. 2023. Giraffe Giraffa camelopardalis feeding: How stereotypies and other behaviours changed at Kolmårdens djurpark in Sweden. Journal of Zoo and Aquarium Research 11(4), 393–399.

Kolmården djurpark keeps one of the most northern living giraffe Giraffa camelopardalis groups in the world, and this comes with its challenges. For a long part of the year, the outside temperature is too cold...

Webb, J. K., Keller, K. A., Chinnadurai, S. K. et al. 2023. Use of alfaxalone in bearded dragons (Pogona vitticeps): Optimizing pharmacodynamics and evaluating cardiogenic effects via echocardiography. Journal of the American Veterinary Medical Association 261(1), 126–131.

OBJECTIVE Bearded dragons (Pogona vitticeps), a popular zoological companion species, frequently require sedation for procedures. A novel formulation of alfaxalone with preservatives was FDA approved for 28-day use after the vial is breached. Research has...

Williams, B., Campbell, J., Kendall, C. et al. 2023. Exploring the behaviors and social preferences of a large, multigenerational herd of zoo-housed southern white rhinoceros (Ceratotherium simum simum). Zoo Biology 42(4), 476–489.

The zoo-housed southern white rhinoceros (SWR) population is of special concern due to their lack of consistent breeding success. An enhanced understanding of SWR social preferences could better inform management planning by promoting natural social...

Brereton, J., Rose, P. 2022. An evaluation of the role of 'biological evidence' in zoo and aquarium enrichment practices. Animal Welfare 31(1), 13-26.

Evidence-based approaches are key to advancing all areas of zoo and aquarium practice. Output from empirical study must be disseminated to those within the industry so that results can support changes to husbandry and management...

Molinaro, H. G., Anderson, G. S., Gruny, L. et al. 2022. Use of blood lactate in assessment of manual capture techniques of zoo-housed crocodilians. Animals 12(3), 397.

Species-specific welfare indicators are important in promoting positive welfare for zoo animals. Reptiles are a notoriously understudied group in regards to behavior, welfare needs, and husbandry requirements. Using opportunistically obtained samples, we evaluated how blood...

Augustine, L., Baskir, E., Kozlowski, C. P. 2022. Investigating welfare metrics for snakes at the Saint Louis zoo. Animals 12(3), 373.

Modern herpetoculture has seen a rise in welfare-related habitat modifications, although ethologically-informed enclosure design and evidence-based husbandry are lacking. The diversity that exists within snakes complicates standardizing snake welfare assessment tools and evaluation techniques. Utilizing...

Escobedo-Bonilla, C. M., Quiros-Rojas, N. M., Rudín-Salazar, E. 2022. Rehabilitation of marine turtles and welfare improvement by application of environmental enrichment strategies. Animals 12(3), 282.

Sea turtles perform various ecological services in several marine environments and are considered architects of the marine landscape. At present, they are endangered species due to anthropogenic threats, pollution and degradation of marine habitats. These...

Leeds, A., Riley, A., Terry, M. et al. 2022. Out of sight, out of mind or just something in the way? Visual barriers do not reduce intraspecific agonism in an all-male group of Nile crocodiles (Crocodylus niloticus). Animals 12(3), 269.

Here, we evaluated if visual barriers could reduce intraspecific agonism in an all-male group of Nile crocodiles (Crocodylus niloticus) living in a zoo. Crocodiles were monitored for nearly 100 h, and four “hotspots” of aggression...

Schütz, A. K., Krause, E. T., Fischer, M. et al. 2022. Computer vision for detection of body posture and behavior of red foxes. Animals 12(3), 233.

The behavior of animals is related to their health and welfare status. The latter plays a particular role in animal experiments, where continuous monitoring is essential for animal welfare. In this study, we focus on...

Serinelli, I., Soloperto, S., Lai, O. R. 2022. Pain and pain management in sea turtle and herpetological medicine: State of the art. Animals 12(6), 697.

In sea turtle rescue and rehabilitative medicine, many of the casualties suffer from occurrences that would be considered painful in other species; therefore, the use of analgesic drugs should be ethically mandatory to manage the...

Li, C., Shen, C., Feng, G. et al. 2022. Preference for shelters at different developmental stages of Chinese mitten crab (Eriocheir sinensis). Animals 12(7), 918.

A shelter is a good habitat for aquatic organisms, which could aid in avoiding cannibalism and facilitate predation. Chinese Mitten Crab (Eriocheir sinensis) is an important aquaculture species with troglodytism and nocturnal habit. To clarify...

Cargill, B. M., Benato, L., Rooney, N. J. 2022. A survey exploring the impact of housing and husbandry on pet snake welfare. Animal Welfare 31(2), 193-208.

Snake ownership is popular; however, housing and care may not always satisfy the animal's welfare needs. For example, snakes are often kept in environmental conditions that restrict their ability to stretch out fully or move...

Diggins, R., Burrie, R., Ariel, E. et al. 2022. A review of welfare indicators for sea turtles undergoing rehabilitation, with emphasis on environmental enrichment. Animal Welfare 31(2), 219-230.

For animals undergoing rehabilitation it is vital to monitor welfare in a way that is feasible, practical, and limits stress to the animal. The industry gold standard is to assess welfare under the Five Domains...