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. 
Lambert, H., Cornish, A., Waley, D. 2024. The value of regulating stocking densities in aquaculture must not be dismissed: A reply to Saraiva et al. 2022. Frontiers in Veterinary Science 10.

We would like to rebut the argument made by Saraiva et al. (1) in their paper “Finding the “golden stocking density”: a balance between fish welfare and farmers' perspectives,” that stocking densities should not be...

Casalini, A., Gentile, L., Emmanuele, P. et al. 2023. Effects of environmental enrichment on the behavior of Octopus vulgaris in a recirculating aquaculture system. Animals 13(11), 1862.

Octopus vulgaris is a commercially valuable species. It is overexploited in the natural environment and is considered to be an innovative species for aquaculture. However, large-scale farming is generally designed only based on economic requirements...

Clegg, I. L. K., Domingues, M., Ström, E. et al. 2023. Cognitive foraging enrichment (but not non-cognitive enrichment) improved several longer-term welfare indicators in bottlenose dolphins. Animals 13(2), 238.

Bottlenose dolphins are the most common cetacean kept globally in zoos and aquaria (hereafter zoos), and are gregarious animals with a mostly opportunistic, generalist feeding strategy in the wild. In zoos, they have limited to...

Platto, S., Serres, A. 2023. A quantitative assessment of trainers-dolphins’ interactions in the absence of food reward. Animals 13(10), 1651.

All the studies that have considered the motivation of the dolphins to interact with their trainers as a possible welfare indicator have been carried out in facilities where the trainer-dolphin interactions (TDIs) sessions were reinforced...

Williams, E., Hunton, V., Hosey, G. et al. 2023. The impact of visitors on non-primate species in zoos: A quantitative review. Animals 13(7), 1178.

Visitors are a prominent feature in the lives of zoo animals, and their presence can cause a range of impacts on zoo animals (typically classed as positive, negative or neutral impacts), commonly referred to as...

Wong, C.-H., Tsai, M.-A., Ko, F.-C. et al. 2023. Skin cortisol and acoustic activity: Potential tools to evaluate stress and welfare in captive cetaceans. Animals 13(9), 1521.

As people’s focus broadens from animals on farms to zoos and aquaria, the field of welfare science and the public’s concern for animal welfare continue to grow. In captive animals, stress and its causes are...

Andrade, M. P., Santos, C. M. D., De Paiva, M. M. M. et al. 2023. Assessing negative welfare measures for wild invertebrates: The case for octopuses. Animals 13(19), 3021.

Welfare metrics have been established for octopuses in the laboratory, but not for octopuses living in the wild. Wild octopuses are constantly exposed to potentially harmful situations, and the ability to assess the welfare status...

Brando, S., Norman, M. 2023. Handling and training of wild animals: Evidence and ethics-based approaches and best practices in the modern zoo. Animals 13(14), 2247.

There is an ethical responsibility to provide all animals living in human care with optimal and positive well-being. As animals living in zoos and aquariums frequently interact with their human caregivers as part of their...

Brunet, V., Lafond, T., Kleiber, A. et al. 2023. Environmental enrichment improves cognitive flexibility in rainbow trout in a visual discrimination task: First insights. Frontiers in Veterinary Science 10.
Campbell-Ward, M. 2023. Quality-of-life assessments in zoo animals: Not just for the aged and charismatic. Animals 13(21), 3394

Zoos should aim to provide all of their animals with a good quality of life (QoL) throughout all life stages. In parallel with the evolution of QoL assessment questionnaires and tools in human and domestic...

Clemente, G. A., Tolini, C., Boscarino, A. et al. 2023. Farmed fish welfare during slaughter in Italy: Survey on stunning and killing methods and indicators of unconsciousness. Frontiers in Veterinary Science 10.

Information on slaughter procedures for farmed fish in aquaculture is limited, both in Europe and in Italy, due to a general lack of field data. The aim of this study was to gather information on...

Jones, B. L., McClain, A. M., Sportelli, J. J. et al. 2023. Return of sound production as a biomarker of bottlenose dolphin emergence from anesthesia. Animals 13(15), 2531.

(1) Background: When a human or animal is recovering from general anesthesia, their medical team uses several behavioral and physiological parameters to assess their emergence from the unconscious state to complete wakefulness. However, the return...

Lewbart, G. A., Zachariah, T. T. 2023. Aquatic and terrestrial invertebrate welfare. Animals 13(21), 3375.

Invertebrates are a diverse group of animals that make up the majority of the animal kingdom and encompass a wide array of species with varying adaptations and characteristics. Invertebrates are found in nearly all of...

Smith, S. A. 2023. Fish welfare in public aquariums and zoological collections. Animals 13(16), 2548.

A wide variety of fish species have been displayed in public aquariums and zoological collections for over 150 years. Though the issue of pain perception in fish is still being debated, there is no disagreement...

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...

Schilling, A.-K., Mazzamuto, M. V., Romeo, C. 2022. A review of non-invasive sampling in wildlife disease and health research: What’s new? Animals 12(13), 1719.

In the last decades, wildlife diseases and the health status of animal populations have gained increasing attention from the scientific community as part of a One Health framework. Furthermore, the need for non-invasive sampling methods...

Eisenbeiser, S., Serbe-Kamp, É., Gage, G. J. et al. 2022. Gills just want to have fun: Can fish play games, just like us? Animals 12(13), 1684.

It is common to observe play in dogs, cats, and birds, but have we been ignoring play in one of the most common house pets of all… fish? Aquarium fish are often used as meditative...

Narshi, T. M., Free, D., Justice, W. S. M. et al. 2022. Welfare assessment of invertebrates: Adapting the animal welfare assessment grid (AWAG) for zoo decapods and cephalopods. Animals 12(13), 1675.

Consumer demand for invertebrates is on the rise as their numbers in the wild dwindle. However, with the growing conservation efforts of modern zoos and aquariums, and evidence from over 300 studies showing that invertebrates...

Guérineau, C., Lõoke, M., Ganassin, G. et al. 2022. Enrichment with classical music enhances affiliative behaviours in bottlenose dolphin. Applied Animal Behaviour Science 254, 105696.

Environmental enrichment is a crucial element for the promotion of welfare of animals kept under human care. While a large variety of environmental enrichments has been proposed and studied for terrestrial animals, including a growing...

Smith, L. E., Rowe, C., Mackay, F. et al. 2022. Aquarium tank design is integral to the elimination of mantle abrasion in the captive curled octopus (Eledone cirrhosa): A case study at Macduff Marine Aquarium. Journal of Applied Animal Welfare Science 25(4), 355-361.

Macduff Marine Aquarium is a native species aquarium situated on the Moray Firth coastline and houses the curled octopus, Eledone cirrhosa, for public display. Historically, the designated octopus display tank has been in-keeping with the...

Serres, A., Hao, Y., Wang, D. 2022. Monitoring captive odontocetes’ participation during training sessions for improving training efficiency and welfare evaluation. Journal of Veterinary Behavior 47, 45-58.

In captive facilities, odontocetes are subject to daily training/feeding sessions which often create close relationships between animals and their caretakers. Therefore, such sessions are thought to provide information that can be useful for welfare assessment...

Spitzer, H. B., Meagher, R. K., Proudfoot, K. L. 2022. The impact of providing hiding spaces to farmed animals: A scoping review. PLOS ONE 17(11), e0277665.

Many wild animals perform hiding behaviours for a variety of reasons, such as evading predators or other conspecifics. Unlike their wild counterparts, farmed animals often live in relatively barren environments without the opportunity to hide...

Kleiber, A., Le-Calvez, J. M., Kerneis, T. et al. 2022. Positive effects of bubbles as a feeding predictor on behaviour of farmed rainbow trout. Scientific Reports 12(1), 11368.

Occupational enrichment emerges as a promising strategy for improving the welfare of farmed animals. This form of enrichment aims to stimulate cognitive abilities of animals by providing them with more opportunities to interact with and...

Mason, G. J., Lavery, J. M. 2022. What is it like to be a bass? Red herrings, fish pain and the study of animal sentience. Frontiers in Veterinary Science 9, 788289.

Debates around fishes’ ability to feel pain concern sentience: do reactions to tissue damage indicate evaluative consciousness (conscious affect), or mere nociception? Thanks to Braithwaite’s research leadership, and concerns that current practices could compromise welfare...

Prentice, P. M., Houslay, T. M., Wilson, A. J. 2022. Exploiting animal personality to reduce chronic stress in captive fish populations. Frontiers in Veterinary Science 9, 1046205.

Chronic stress is a major source of welfare problems in many captive populations, including fishes. While we have long known that chronic stress effects arise from maladaptive expression of acute stress response pathways, predicting where...