Role of light and circadian rhythms in the nocturnal behavior of Galago crassicaudatus.

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Abstract
Designed a series of 5 experiments to examine the nocturnal behavior of 6 wild-caught male-female pairs of Galago crassicaudatus in terms of the concepts of light-related behavior from the psychological literature and concepts of circadian rhythms from the biological literature. Results suggest that an adequate characterization of nocturnal behavior in the galago must consider illumination preferences, the direct consequences of light on ongoing behavior, and circadian variations in activity level. Results show that although each of these factors has a measurable effect on behavior, the nocturnal pattern is dependent on complex interactions between all factors. The immediate effects of light intensity are influenced by prevailing activity level; this level, in turn, is dependent upon where the S is within its daily behavioral cycle; and the cycle itself is synchronized with a circadian illumination schedule. (17 ref.) (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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