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Influence of the nycthemeral cycle on the roosting behaviour of the Orange-winged Amazon Anais da ABC (AABC)
Moura,Leiliany N. de; Silva,Maria Luisa da; Vielliard,Jacques M.E..
Environmental stimuli exert important effects on the expression of the endogenous rhythms. Daily movements of groups of parrots in response to the light/dark cycle have been studied by several researchers. However, the factors modifying the intrinsic rhythmicity of this behaviour remain little known. This study describes how the nychthemeral/circadian periodicity of roost daily movements of the Orange-winged Amazon Amazona amazonica is modified by weather factors. Numbers of parrots arriving or leaving the roosting site Ilha dos Papagaios were determined on a minute by minute basis. More parrots have significantly arrived at the roost after sunset than before, while more parrots have significantly left the roost before sunrise than after. The peak exodus...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazona amazonica; Amazônia; Biological rhythms; Light/dark cycles; Roosting behaviour; Weather conditions.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000200019
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