Hiding from the moonlight: luminosity and temperature affect activity of Asian nocturnal primates in a highly seasonal forest.

PloS One
C R StarrLuke Leung

Abstract

The effect of moonlight and temperature on activity of slow lorises was previously little known and this knowledge might be useful for understanding many aspects of their behavioural ecology, and developing strategies to monitor and protect populations. In this study we aimed to determine if the activity of the pygmy loris (Nycticebus pygmaeus) is affected by ambient temperature and/or moonlight in a mixed deciduous forest. We radio-collared five females and five males in the Seima Protection Forest, Cambodia, in February to May, 2008 and January to March, 2009 and recorded their behaviour at 5 minutes intervals, totalling 2736 observations. We classified each observation as either inactive (sleeping or alert) or active behaviour (travel, feeding, grooming, or others). Moon luminosity (bright/dark) and ambient temperature were recorded for each observation. The response variable, activity, was binary (active or inactive), and a logit link function was used. Ambient temperature alone did not significantly affect mean activity. Although mean activity was significantly affected by moonlight, the interaction between moonlight and temperature was also significant: on bright nights, studied animals were increasingly more active with ...Continue Reading

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Citations

Nov 11, 2014·Annual Review of Animal Biosciences·Jill Pecon-Slattery
Nov 28, 2012·American Journal of Physical Anthropology·Giuseppe DonatiSilvana Borgognini-Tarli
Jun 27, 2013·American Journal of Primatology·Carly Starr, K A I Nekaris
Oct 23, 2014·PloS One·Sabrina KriefShelly Masi
Oct 1, 2013·The Journal of Venomous Animals and Toxins Including Tropical Diseases·K Anne-Isola NekarisBryan G Fry
Jun 9, 2018·Primates; Journal of Primatology·Derick Nomuh Forbanka

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