Nonhuman Primate

Evaluating outcomes of diazepam administration in gradual steps introductions of adult male and female rhesus macaques (Macaca mulatta)

Social housing remains one of the best forms of environmental enhancement for nonhuman primates (NHPs). The gradual steps (GS) method, a 2-step plan involving an initial phase of limited physical contact (protected contact [PC]) prior to full contact (FC), is...

Year Published: 2025Topics: Social Housing & CompanionshipAnimal Type: Macaque, Nonhuman Primate

Citation: Myers, A. K., Baker, K. C., Kubisch, M. J. et al. 2025. Evaluating outcomes of diazepam administration in gradual steps introductions of adult male and female rhesus macaques (Macaca mulatta). Journal of the American Association for Laboratory Animal Science 64(1), 146–154.

Comparison of different formulations of extended-release buprenorphine in perioperative pain management in common marmosets (Callithrix jacchus)

Common marmosets (Callithrix jacchus) are increasingly used in biomedical research and often undergo surgery as part of IACUC-approved protocols. Therefore, pain control is essential to their clinical management and welfare. Extended-release buprenorphine is a valuable opioid analgesic option, as it...

Year Published: 2025Topics: AnalgesiaAnimal Type: Marmoset, Nonhuman Primate

Citation: Mokhtar Pouriani, K., McAndrew, R., Chan, N. et al. 2025. Comparison of different formulations of extended-release buprenorphine in perioperative pain management in common marmosets (Callithrix jacchus). Journal of the American Association for Laboratory Animal Science 64(3), 374–384.

Behavior and safety in the use of canopy bridges by howler monkeys in an experimental environment

Urban sprawl advances over forested areas and threatens arboreal species, which often use roads, power lines, and rooftops to move, resulting in roadkill, electrocution, and dog attacks. One measure to mitigate these risks is the installation of canopy bridges, which...

Year Published: 2025Topics: Environmental Enrichment, HousingAnimal Type: Nonhuman Primate, Other Nonhuman Primate

Citation: Dias, P., Teixeira, F. Z., Ferrugem, V. H. C. et al. 2025. Behavior and safety in the use of canopy bridges by howler monkeys in an experimental environment. Applied Animal Behaviour Science 290, 106696.

The importance of novel and cognitive enrichment for captive chimpanzees (Pan troglodytes) and the use of activity budgets and social network analysis to assess welfare (2025)

I introduced foraging enrichment with a cognitive component to a group of six captive adult chimpanzees living at ZSL Whipsnade Zoo in Dunstable in the United Kingdom. I conducted preliminary behavioural observations for 13 days spread over a four week...

Year Published: 2025Topics: Environmental EnrichmentAnimal Type: Chimpanzee, Nonhuman Primate

Citation: Stitt, A. E. 2025. The importance of novel and cognitive enrichment for captive chimpanzees (Pan troglodytes) and the use of activity budgets and social network analysis to assess welfare. Canopy 25(2).

Advancing non-human primate welfare: An automated facial recognition system for unrestrained cynomolgus monkeys (2025)

Cynomolgus monkeys (Macaca fascicularis) are vital in biomedical research, particularly for drug development and studying neurological diseases. However, accurately identifying individuals in group housing environments remains a significant challenge. This paper presents a near real-time facial recognition system tailored for...

Year Published: 2025Topics: Identification MethodAnimal Type: Macaque, Nonhuman Primate

Citation: Numata, Y., Sumali, B., Hayashida, K. et al. 2025. Advancing non-human primate welfare: An automated facial recognition system for unrestrained cynomolgus monkeys. PLOS ONE 20(4), e0319897.

Social enrichment to reduce pacing in a solitary housed male lion-tailed macaque Macaca silenus (2025)

Environmental enrichment is frequently used to improve the captive environment, aiming to enhance the quality of captive animal care. Social enrichment is considered to be the most effective form of enrichment for captive primates, particularly in the reduction of abnormal...

Year Published: 2025Topics: Social Housing & CompanionshipAnimal Type: Macaque, Nonhuman Primate

Citation: Newman, R., Quirke, T., McKeown, S. et al. 2025. Social enrichment to reduce pacing in a solitary housed male lion-tailed macaque Macaca silenus. Journal of Zoo and Aquarium Research 13(1), 52–55.

A metric-based, meta-analytic appraisal of environmental enrichment efficacy in captive primates (2025)

Non-human primates (hereafter ‘primates') constitute a common group of animals in captivity but their captive maintenance involves ethical and husbandry issues, many of which can be addressed through environmental enrichment (hereafter ‘enrichment'). Enrichment is often applied in a trial-and-error fashion...

Year Published: 2025Topics: Environmental Enrichment, Social Housing & CompanionshipAnimal Type: Baboon, Capuchin, Chimpanzee, Gibbon, Lemur, Macaque, Marmoset, Nonhuman Primate, Other Nonhuman Primate, Owl Monkey, Squirrel Monkey, Vervet (African Green Monkey)

Citation: Duncan, L. M., Pillay, N. 2025. A metric-based, meta-analytic appraisal of environmental enrichment efficacy in captive primates. Animals 15(6), 799.

Home-cage training for non-human primates: an opportunity to reduce stress and study natural behavior in neurophysiology experiments (2025)

Research involving non-human primates remains a cornerstone in fields such as biomedical research and systems neuroscience. However, the daily routines of laboratory work can induce stress in these animals, potentially compromising their well-being and the reliability of experimental outcomes. To...

Year Published: 2025Topics: Animal TrainingAnimal Type: Baboon, Capuchin, Chimpanzee, Gibbon, Lemur, Macaque, Marmoset, Nonhuman Primate, Other Nonhuman Primate, Owl Monkey, Squirrel Monkey, Vervet (African Green Monkey)

Citation: Ceccarelli, F., Londei, F., Arena, G. et al. 2025. Home-Cage Training for Non-Human Primates: An Opportunity to Reduce Stress and Study Natural Behavior in Neurophysiology Experiments. Animals 15(9), 1340.

A systematic review of the effects of musical enrichment on captive mammals (2025)

Forty two studies examining physiological, behavioural and cognitive mammalian responses to music were identified, with 38.1% of those studies focusing on primates. The studies identified included 23 mammalian species across six animal orders (Artiodactyla, Carnivora, Perissodactyla, Primates, Proboscidea and Rodentia)....

Year Published: 2025Topics: Environmental EnrichmentAnimal Type: Baboon, Capuchin, Cat, Chimpanzee, Chinchilla, Dog, Gerbil, Gibbon, Guinea Pig, Hamster, Lemur, Macaque, Marmoset, Mole Rat, Mouse, Nonhuman Primate, Other Nonhuman Primate, Other Rodent, Owl Monkey, Rat, Rodent, Squirrel Monkey, Vervet (African Green Monkey)

Citation: Alkalaj, M. 2025. A systematic review of the effects of musical enrichment on captive mammals. Canopy 25(2).

Long term impacts of early social environment on chimpanzee white matter

Early adverse rearing conditions are known to have deleterious consequences on social behavior, cognition, and brain development of both human and nonhuman primates. We analyzed archival diffusion tensor imaging (DTI) data from mother- (MR) or nursery-reared (NR) chimpanzees and used...

Year Published: 2024Topics: Social Housing & CompanionshipAnimal Type: Chimpanzee, Nonhuman Primate

Citation: Mulholland, M. M., Hecht, E., Wesley, M. J. et al. 2024. Long term impacts of early social environment on chimpanzee white matter. Scientific Reports 14(1), 29879.