Nonhuman Primate

Update on current hormonal and non-hormonal contraceptive options in non-human primates

Reproductive success in captive non-human primates (NHPs) has increased the demand for safe, effective, and reversible population control methods. This review provides an overview of the current literature on hormonal and non-hormonal contraceptives as reproductive control methods in NHPs. Where...

Year Published: 2024Topics: ReproductionAnimal Type: Baboon, Capuchin, Lemur, Macaque, Marmoset, Nonhuman Primate, Other Nonhuman Primate, Owl Monkey, Squirrel Monkey, Vervet (African Green Monkey)

Citation: Nederlof, R. A., Bruins-van Sonsbeek, L. G. R., Stumpel, J. B. G. et al. 2024. Update on current hormonal and non-hormonal contraceptive options in non-human primates. Journal of Zoological and Botanical Gardens 5(4), 606–629.

Specifically unspecific – Simple devices as feasible and effective enrichment for small mammals

Although enrichment is an essential part of modern zoo animal husbandry, research on effective enrichment for small mammals is scarce, albeit they are regularly kept in zoos. To develop solutions that are inexpensive, readily applicable, and adaptable for a variety...

Year Published: 2024Topics: Environmental EnrichmentAnimal Type: Nonhuman Primate, Other Animal, Other Nonhuman Primate, Other Rodent, Rat, Rodent

Citation: Göbel, M., Kaiser, S., Richter, H. et al. 2024. Specifically unspecific – Simple devices as feasible and effective enrichment for small mammals. Animal Behavior and Cognition 11(3), 305–329.

Enriched social environment affects the utterance of acoustic signals of captive François’ langurs

Vocal communication serves as an important mode of interaction among animals. The quantitative analysis of acoustic signals holds scientific value in highlighting the importance of understanding the social-ecological contexts and their effects on acoustic communication. The results can provide a...

Year Published: 2024Topics: VocalizationAnimal Type: Nonhuman Primate, Other Nonhuman Primate

Citation: Xie, Y., Liu, Y., Li, Y. et al. 2024. Enriched social environment affects the utterance of acoustic signals of captive François' langurs. Applied Animal Behaviour Science 277, 106351.

Evaluating enrichment use in group-housed rhesus macaques (Macaca mulatta): A machine learning approach

Environmental enrichment programmes are widely used to improve welfare of captive and laboratory animals, especially non-human primates. Monitoring enrichment use over time is crucial, as animals may habituate and reduce their interaction with it. In this study we aimed to...

Year Published: 2024Topics: Environmental EnrichmentAnimal Type: Macaque, Nonhuman Primate

Citation: Ciminelli, G., Witham, C., Bateson, M. 2024. Evaluating enrichment use in group-housed rhesus macaques (Macaca mulatta): A machine learning approach. Animal Welfare 33, e59.

First noncontact millimeter-wave radar measurement of heart rate in great apes: Validation in chimpanzees (Pan troglodytes)

Heart rate is a crucial vital sign and a valuable indicator for assessing the physical and psychological condition of a target animal. Heart rate contributes to (1) fundamental information for cognitive research, (2) an indicator of psychological and physical stress,...

Year Published: 2024Topics: Biological Sampling & Physiological MeasurementAnimal Type: Chimpanzee, Nonhuman Primate

Citation: Matsumoto, T., Iwata, I., Sakamoto, T. et al. 2024. First noncontact millimeter-wave radar measurement of heart rate in great apes: Validation in chimpanzees (Pan troglodytes). American Journal of Primatology 86(8), e23633.

Outdoor noncontact respiratory measurements of unrestricted rhesus macaques (Macaca mulatta) using millimeter-wave radar

Respiration is an invaluable signal that facilitates the real-time observation of physiological dynamics. In recent years, the advancement of noncontact measurement technology has gained momentum in capturing physiological activities in natural settings. This technology is anticipated to be found not...

Year Published: 2024Topics: Biological Sampling & Physiological MeasurementAnimal Type: Chimpanzee, Nonhuman Primate

Citation: Minami, T., Sanematsu, D., Iwata, I. et al. 2024. Outdoor noncontact respiratory measurements of unrestricted rhesus macaques (Macaca mulatta) using millimeter-wave radar. American Journal of Primatology 86(9), e23661.

The influence of age, sex, and season on hematological parameters in a captive population of former laboratory chimpanzees (Pan troglodytes)

This study aimed to establish a baseline hematological profile and examine the influence of age, sex, and season on hematological parameters in captive chimpanzees (Pan troglodytes) living in a humid tropical climate. Hematological parameters are a useful tool for assessing...

Year Published: 2025Topics: Welfare AssessmentAnimal Type: Chimpanzee, Nonhuman Primate

Citation: Ngoubangoye, B., Dibakou, S.-E., Otsaghe Ekore, D. et al. 2025. The influence of age, sex, and season on hematological parameters in a captive population of former laboratory chimpanzees (Pan troglodytes). American Journal of Primatology 87(1), e23703.

Evaluating indicators of wellbeing in captive grey mouse lemurs, Microcebus murinus, in the context of enrichment

Developing and implementing effective approaches to improve the welfare of animals participating in research requires reliable monitoring of their wellbeing. Since wellbeing is a multidimensional state that relates to an individual's physiological, behavioural and psychological/mental health, assessing it requires the...

Year Published: 2024Topics: Environmental EnrichmentAnimal Type: Lemur, Nonhuman Primate

Citation: Perea-Rodriguez, J. P., Ferreira, J., Anzeraey, A. et al. 2024. Evaluating indicators of wellbeing in captive grey mouse lemurs, Microcebus murinus, in the context of enrichment. Animal Behaviour 218, 121–134.

Applying an eye tracking technique to gibbons: First study using scanpath measurements for visual stimuli

Compared to the abundance of research on cognition in various nonhuman primate species, studies of gibbons -- often called “the small apes” -- remain limited, despite the importance of gibbons for understanding evolutionary processes in humans and other apes. Over...

Year Published: 2024Topics: Behavioral & Cognitive TestingAnimal Type: Gibbon, Nonhuman Primate

Citation: Uchikoshi, M., Yu, L., Hattori, Y. 2024. Applying an eye tracking technique to gibbons: First study using scanpath measurements for visual stimuli. Behavioural Processes 221, 105080.

Teeth baring as a model to understand complex facial signals in a tolerant macaque species

Facial communication regulates many aspects of social life in human and nonhuman primates. Empirically identifying distinct facial expressions and their underlying functions can help illuminate the evolution of species' communicative complexity. We focused on bared-teeth faces (BTFs), a highly versatile...

Year Published: 2025Topics: Natural BehaviorAnimal Type: Macaque, Nonhuman Primate

Citation: Fantoni, F., Maglieri, V., Giusti, N. et al. 2025. Teeth baring as a model to understand complex facial signals in a tolerant macaque species. American Journal of Primatology 87(1), e23697.