Nonhuman Primate

Refining enrichment toy interactions in common marmosets through usage assessment

Apart from species-typical foraging behavior, a large body of the literature addresses enriching captive marmoset environments through structural and housing adaptations to promote activity and exploration. These studies simulate vertical elements and climbing substrates in the captive environment and are...

Year Published: 2022Topics: Environmental EnrichmentAnimal Type: Marmoset, Nonhuman Primate

Citation: Aird, T., Pierre, P. J. 2022. Refining enrichment toy interactions in common marmosets through usage assessment. Laboratory Animal Science Professional 10(1) (January/February), 64-66.

Influence of pair-housing on sleep parameters evaluated with actigraphy in female rhesus monkeys

Rhesus monkeys are naturally social animals, and behavioral management strategies have focused on promoting pairhousing in laboratory settings as an alternative to individual or group housing. In humans, co-sleeping can have a major impact on bed partners' sleep, raising the...

Year Published: 2022Topics: Social Housing & CompanionshipAnimal Type: Macaque, Nonhuman Primate

Citation: Berro, L. F., Pareek, T., Reeves-Darby, J. A. et al. 2022. Influence of pair-housing on sleep parameters evaluated with actigraphy in female rhesus monkeys. JAALAS 61(2), 165-172.

Single-dose diazepam administration improves pairing success of unfamiliar adult male rhesus macaques (Macaca mulatta)

Social housing is one of the best forms of environmental enhancement for nonhuman primates, and current research into pair compatibility and introduction techniques focuses on improving safety and outcome. The gradual steps method (GS), which is widely used for introducing...

Year Published: 2022Topics: Social Housing & CompanionshipAnimal Type: Macaque, Nonhuman Primate

Citation: Kezar, S. M., Baker, K. C., Russell-Lodrigue, K. E. et al. 2022. Single-dose diazepam administration improves pairing success of unfamiliar adult male rhesus macaques (Macaca mulatta). JAALAS 61(2), 173-180.

Chronic collection of cerebrospinal fluid from rhesus macaques (Macaca mulatta) with cisterna magna ports: Update on refinements

More than 20 y ago, we developed an animal model for chronic and continuous collection of cerebrospinal fluid (CSF) from conscious rhesus macaques. Since our previous publication in 2003, we have successfully implanted 168 rhesus macaques using this approach. Our...

Year Published: 2022Topics: Biological Sampling & Physiological MeasurementAnimal Type: Macaque, Nonhuman Primate

Citation: Gilberto, D., Michener, M., Smith, B. et al. 2022. Chronic collection of cerebrospinal fluid from rhesus macaques (Macaca mulatta) with cisterna magna ports: Update on refinements. Comparative Medicine 72(1), 45-49.

Sex differences in hierarchical stability in a formation of a mixed-sex group of rhesus macaques

Forming groups of captive rhesus macaques (Macaca mulatta) is a common management practice. New formations of unfamiliar macaques can be costly, with high levels of trauma, particularly as intense aggression is used to establish a dominance hierarchy. Combining previous subgroups...

Year Published: 2022Topics: Social Housing & CompanionshipAnimal Type: Macaque, Nonhuman Primate

Citation: Wooddell, L. J., Beisner, B. A., Nathman, A. C. et al. 2022. Sex differences in hierarchical stability in a formation of a mixed-sex group of rhesus macaques. JAALAS 61(1), 67-74.

Bedding as an enrichment strategy in group-housed Mauritian cynomolgus macaques (Macaca fascicularis)

The research community is committed to improving the well-being of nonhuman primates by providing opportunities to express species-specific behaviors such as foraging. In the wild, macaques spend a large part of their day foraging; this behavior is greatly limited in...

Year Published: 2022Topics: Environmental Enrichment, Husbandry & ManagementAnimal Type: Macaque, Nonhuman Primate

Citation: Janavaris, M., Bader, L., Hansen, J. J. et al. 2022. Bedding as an enrichment strategy in group-housed Mauritian cynomolgus macaques (Macaca fascicularis). JAALAS 61(2), 159-164.

Enriched sleep environments lengthen lemur sleep duration

Characteristics of the sleep-site are thought to influence the quality and duration of primate sleep, yet only a handful of studies have investigated these links experimentally. Using actigraphy and infrared videography, we quantified sleep in four lemur species (Eulemur coronatus,...

Year Published: 2021Topics: Environmental EnrichmentAnimal Type: Lemur, Nonhuman Primate

Citation: Vining, A. Q., Nunn, C. L., Samson, D. R. 2021. Enriched sleep environments lengthen lemur sleep duration. PLOS ONE 16(11), e0253251.

Knowledge-based enrichment: Development of a novel enrichment device for captive chimpanzees

The field of environmental enrichment has grown considerably, but most enrichment is still focused on tasks where highly valued food rewards are directly visible. We designed a device which would instead make use of knowledge states, motivational structure, and physical...

Year Published: 2021Topics: Environmental EnrichmentAnimal Type: Chimpanzee, Nonhuman Primate

Citation: Brooks, J., Yoshimura, H., Taki, Y. 2021. Knowledge-based enrichment: Development of a novel enrichment device for captive chimpanzees. Zoo Biology 40(5), 398-406.

Chronic captivity stress in wild animals is highly species-specific

Wild animals are brought into captivity for many reasons—conservation, research, agriculture and the exotic pet trade. While the physical needs of animals are met in captivity, the conditions of confinement and exposure to humans can result in physiological stress. The...

Year Published: 2019Topics: HousingAnimal Type: All/General, Amphibian, Baboon, Capuchin, Chimpanzee, Crocodile & Alligator, Frog & Toad, Gibbon, Lemur, Lizard, Macaque, Marine Mammal, Marmoset, Nonhuman Primate, Other Animal, Other Nonhuman Primate, Owl Monkey, Reptile, Salamander, Snake, Squirrel Monkey, Turtle & Tortoise, Vervet (African Green Monkey)

Citation: Fischer, C. P., Romero, L. M. 2019. Chronic captivity stress in wild animals is highly species-specific. Conservation Physiology 7(1), coz093.

Refined acquisition of high-resolution chest CTs in macaques by free breathing

The use of medical imaging as a non-invasive or minimally invasive method to assess disease or treatment response continues to grow. A similar trend is observed in pre-clinical research, in general, and more specifically in macaques, enabling longitudinal assessment of...

Year Published: 2021Topics: Imaging & Electrophysiological RecordingAnimal Type: Macaque, Nonhuman Primate

Citation: Tölgyesi, B., Bakker, J., Nagy, K. et al. 2021. Refined acquisition of high-resolution chest CTs in macaques by free breathing. Laboratory Animals 55(6), 551-559.