Figure 1 - uploaded by Matilda Brindle
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Screen captures of the 'birds-eye' view of captive chimpanzees during the night at Kumamoto Sanctuary, Japan showing (a) nocturnal penile tumescence (NPT) and (b) masturbation.
Source publication
Nocturnal penile tumescence (NPT) has been reported for males of only a few mammalian species, including humans, albeit this scarcity might be an artefact of the difficulty of documenting it. We investigated NPT in 12 adult male chimpanzees living in an all-male group at Kumamoto Sanctuary, Japan. Recorded non-invasively with infrared video cameras...
Context in source publication
Context 1
... part of a separate project investigating the sleep patterns of aging chimpanzees ( Havercamp et al., 2021), we non-invasively recorded nocturnal behaviour using one external infrared light (F8150_940 nm; EnergyPower, Tokyo, Japan) and one infrared video camera (Wyze Cam V2 1080p; Wyze Labs, Seattle, WA, USA) per room. These were installed above the night enclosures, providing a 'bird's-eye view' of the sleeping chimpanzees (Fig- ure 1). ...
Citations
... Wyze cameras have been used to record behavior in frogs (Gupta et al., 2016), fish (McGaugh et al., 2020), pigs (Netzley et al., 2021), and chimpanzees (Havercamp et al., 2022). The diversity of animals and environments studied with these cameras illustrate their adaptability for many research projects. ...
Reliably capturing transient animal behavior in the field and laboratory remains a logistical and financial challenge, especially for small ectotherms. Here, we present a camera system that is affordable, accessible, and suitable to monitor small, cold-blooded animals historically overlooked by commercial camera traps, such as small amphibians. The system is weather-resistant, can operate offline or online, and allows collection of time-sensitive behavioral data in laboratory and field conditions with continuous data storage for up to four weeks. The lightweight camera can also utilize phone notifications over Wi-Fi so that observers can be alerted when animals enter a space of interest, enabling sample collection at proper time periods. We present our findings, both technological and scientific, in an effort to elevate tools that enable researchers to maximize use of their research budgets. We discuss the relative affordability of our system for researchers in South America, which is home to the largest population of ectotherm diversity.
