Estimating activity of Japanese macaques (Macaca fuscata) using accelerometers.

Area of Science:

• Primatology
• Behavioral Ecology
• Biologging

Background:

• Accelerometers are widely used in wildlife research, primarily for birds and mammals like ungulates and carnivores.
• Studies on nonhuman primate activity using accelerometers are less common, indicating a research gap.

Purpose of the Study:

• To evaluate the effectiveness of accelerometers for monitoring the activity patterns of Japanese macaques (Macaca fuscata).
• To assess the accuracy of accelerometer-derived activity data compared to traditional observational methods.

Main Methods:

• Collar-mounted accelerometers were used to collect movement data from a male and female Japanese macaque.
• Sensor data were correlated with continuous focal observations from video recordings to build activity classification models.
• Cross-validation was employed to test model robustness.

Main Results:

• Activity classification models achieved over 90% accuracy (AUC) for both subjects.
• Accelerometer-based activity estimates showed accuracy comparable to 1-min and 5-min instantaneous sampling.
• The models successfully analyzed circadian rhythms and nocturnal activity patterns.

Conclusions:

• Accelerometers are a feasible and accurate tool for studying the activity of Japanese macaques and potentially other nonhuman primates.
• This remote-sensing technology can advance primatological studies by providing detailed behavioral insights.
• The study highlights the benefits and applications of accelerometers in primate research.