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. 
Cavallino, L., Rincón, L., Scaia, M. F. 2023. Social behaviors as welfare indicators in teleost fish. Frontiers in Veterinary Science 10, 1050510.

Animal welfare is a key issue not only for aquaculture industry and food production, but also for daily husbandry practices in research topics related to physiology in wild and farmed animals. In this context, teleost...

Cohen, S., Ho, C. 2023. Review of rat (Rattus norvegicus), Mouse (mus musculus), Guinea pig (Cavia procellus), and rabbit (Oryctolagus cuniculus) indicators for welfare assessment. Animals 13(13), 2167.

The monitoring and assessment of animals is important for their health and welfare. The appropriate selection of multiple, validated, and feasible welfare assessment indicators is required to effectively identify compromises or improvements to animal welfare...

Holhorea, P. G., Felip, A., Calduch-Giner, J. À. et al. 2023. Use of male-to-female sex reversal as a welfare scoring system in the protandrous farmed gilthead sea bream (Sparus aurata). Frontiers in Veterinary Science 9, 1083255.

Gilthead sea bream is a highly cultured marine fish throughout the Mediterranean area, but new and strict criteria of welfare are needed to assure that the intensification of production has no negative effects on animal...

Swan, J., Boyer, S., Westlund, K. et al. 2023. Decreased levels of discomfort in repeatedly handled mice during experimental procedures, assessed by facial expressions. Frontiers in Behavioral Neuroscience 17, 1109886.

Mice are the most commonly used laboratory animal, yet there are limited studies which investigate the effects of repeated handling on their welfare and scientific outcomes. Furthermore, simple methods to evaluate distress in mice are...

O’Brien, S. L., Cronin, K. A. 2023. Doing better for understudied species: Evaluation and improvement of a species-general animal welfare assessment tool for zoos. Applied Animal Behaviour Science 264, 105965.

Accredited zoos and aquariums are required to have a welfare assessment process in place for the animals in their care. However, welfare assessment theoretical frameworks and methodologies vary widely. Previous studies have shown that taxonomic...

Dara, M., Carbonara, P., La Corte, C. et al. 2023. Fish welfare in aquaculture: Physiological and immunological activities for diets, social and spatial stress on Mediterranean aqua cultured species. Fishes 8(8), 414.

Welfare assessment currently is less well-characterized for aquatic animals and the classical methodologies used for terrestrial animals are not adequate to improve our knowledge about fish well-being. Among different approaches, the status of organism responses...

Moëne, O. L., Larsson, M. 2023. A new tool for quantifying mouse facial expressions. ENeuro 10(2) ENEURO.0349-22.2022.

Facial expressions are an increasingly used tool to assess emotional experience and affective state during experimental procedures in animal models. Previous studies have successfully related specific facial features with different positive and negative valence situations...

Alvarado, M. V., Felip, A., Espigares, F. et al. 2023. Unexpected appetitive events promote positive affective state in juvenile European sea bass. Scientific Reports 13(1), 22064.

Some animal species exhibit considerable physiological and behavioural alterations in response to captivity. It has been hypothesized, but rarely tested, that such changes reflect a negative affective state that is associated to this specific context...

Cortés Pérez, E., Maldonado Reséndiz, R. I. 2023. Welfare indices in Anurans under human care. Journal of Zoological and Botanical Gardens 4(3), 613–622.

Certain species within the order Anura are relatively new in the context of exotic animals as pets, and the precise conditions required for their optimal care and well-being are still not well understood. This knowledge...

da Santa Lopes, T., Costas, B., Ramos-Pinto, L. et al. 2023. Exploring the effects of acute stress exposure on lumpfish plasma and liver biomarkers. Animals 13(23), 3623.

This study aimed to expand knowledge on lumpfish stress physiology by investigating the effects of acute stress on primary (i.e., cortisol) and secondary (e.g., metabolites) stress responses, as well as oxidative stress biomarkers, from stress...

Dara, M., Carbonara, P., La Corte, C. et al. 2023. Fish welfare in aquaculture: Physiological and immunological activities for diets, social and spatial stress on mediterranean aqua cultured species. Fishes 8(8), 414.

Welfare assessment currently is less well-characterized for aquatic animals and the classical methodologies used for terrestrial animals are not adequate to improve our knowledge about fish well-being. Among different approaches, the status of organism responses...

Dietrich, T., Aigner, A., Hildebrandt, A. et al. 2023. Nesting behavior is associated with body weight and grip strength loss in mice suffering from experimental arthritis. Scientific Reports 13(1), 23087.

Objective animal health evaluation is essential to determine welfare and discomfort in preclinical in vivo research. Body condition scores, body weight, and grimace scales are commonly used to evaluate well-being in murine rheumatoid arthritis (RA)...

rueger, J. C., Boecker, M., Gauggel, S. et al. 2023. Using photographs for rating severity degrees of clinical appearance in research mice enables valid discrimination of extreme but not mild and moderate conditions: A pilot study. PLOS ONE 18(11), e0287965.

To ensure good animal welfare in laboratory research and in stockbreeding severity ratings of the animals´ wellbeing are essential. The current study investigated how valid raters can evaluate different severity degrees of clinical appearance and...

Lertwanakarn, T., Purimayata, T., Luengyosluechakul, T. et al. 2023. Assessment of tilapia (oreochromis spp.) welfare in the semi-intensive and intensive culture systems in Thailand. Animals 13(15), 2498.

Welfare assessments have risen to prominence in the aquaculture industry, with increasing awareness of their significance among stakeholders in Thailand. In this study, we conducted a welfare assessment of tilapia (Oreochromis spp.) farms in Thailand...

Pedrazzani, A. S., Cozer, N., Quintiliano, M. H. et al. 2023. From egg to slaughter: Monitoring the welfare of Nile tilapia, Oreochromis niloticus, throughout their entire life cycle in aquaculture. Frontiers in Veterinary Science 10.
Reiber, M., Schumann, L. von, Buchecker, V. et al. 2023. Evidence-based comparative severity assessment in young and adult mice. PLOS ONE 18(10), e0285429.

In animal-based research, welfare assessments are essential for ethical and legal reasons. However, accurate assessment of suffering in laboratory animals is often complicated by the multidimensional character of distress and pain and the associated affective...

Tanaka, Y., Nakata, T., Hibino, H. et al. 2023. Classification of multiple emotional states from facial expressions in head-fixed mice using a deep learning-based image analysis. PLOS ONE 18(7), e0288930.

Facial expressions are widely recognized as universal indicators of underlying internal states in most species of animals, thereby presenting as a non-invasive measure for assessing physical and mental conditions. Despite the advancement of artificial intelligence-assisted...

Wiese, T. R., Rey Planellas, S., Betancor, M. et al. 2023. Qualitative Behavioural Assessment as a welfare indicator for farmed Atlantic salmon (Salmo salar) in response to a stressful challenge. Frontiers in Veterinary Science 10.

Animal welfare assessments have struggled to investigate the emotional states of animals while focusing solely on available empirical evidence. Qualitative Behavioural Assessment (QBA) may provide insights into an animal’s subjective experiences without compromising scientific rigor...

Mocho, J.-P., Collymore, C., Farmer, S. C. et al. 2022. FELASA-AALAS recommendations for monitoring and reporting of laboratory fish diseases and health status, with an emphasis on zebrafish (Danio rerio). Comparative Medicine 72(3), 127-148.

The exchange of fish for research may expose an aquatic laboratory to pathogen contamination as incoming fish can introduce bacteria, fungi, parasites, and viruses capable of affecting both experimental results and fish and personnel health...

MacLellan, A., Nazal, B., Young et al. 2022. Waking inactivity as a welfare indicator in laboratory mice: Investigating postures, facial expressions and depression-like states. Royal Society Open Science 9(11), 221083.

Animal welfare assessment relies on valid and practical indicators of affect. In mice, the most widely used research vertebrates, lying still with eyes open, inactive-but-awake (IBA) in the home cage, has potential to be one...

Böswald, L. F., Matzek, D., Mohr, H. et al. 2022. Morphometrics of Xenopus laevis kept as laboratory animals. Animals 12(21), 2986.

Morphometric data that provide information on body conditions can be used to monitor the health and well-being of animals. In laboratory animals, they can help to evaluate the stress due to experiments or treatments, following...

Talbot, S. R., Struve, B., Wassermann, L. et al. 2022. RELSA—A multidimensional procedure for the comparative assessment of well-being and the quantitative determination of severity in experimental procedures. Frontiers in Veterinary Science 9, 937711.

Good science in translational research requires good animal welfare according to the principles of 3Rs. In many countries, determining animal welfare is a mandatory legal requirement, implying a categorization of animal suffering, traditionally dominated by...

Imsland, A. K. D., Berg, M. S., Haugland, G. T. et al. 2022. Comparing body density of lumpfish (Cyclopterus lumpus) to different operational welfare indicators. Fishes 7(5), 284.

Farmed lumpfish (Cyclopterus lumpus) are commonly used as cleaner fish in the salmonid aquaculture industry, but a knowledge gap exists with regards to their body density. Filling this knowledge gap is of importance, as the...

Tschirren, L., Bachmann, D., Güler, A. C. et al. 2021. MyFishCheck: A model to assess fish welfare in aquaculture. Animals 11(1), 145.

Welfare in animal husbandry includes considerations of biology, ethics, ecology, law and economics. These diverse aspects must be translated into common quantifiable parameters and applicable methods to objectively assess welfare in animals. To assist this...

Burlingame, L. A., Gaskill, B. N., Lofgren, J. L. S. 2021. Identification of sick or dead mice (Mus musculus) housed with 6 grams of crinkle paper nesting material. JAALAS 60(1), 18-27.

Although nesting material is beneficial to the welfare of laboratory mice, provision of appropriate amounts may impair visualization of the mice. In anticipation of our academic research institution transitioning to providing 6 grams of nesting...