Data from: Light environment influences mating behaviours during the early stages of divergence in tropical butterflies

Alexander E. Hausmann, Chi-Yun Kuo, Marília Freire, Nicol Rueda-M, Mauricio Linares, Carolina Pardo-Diaz, Camilo Salazar & Richard M. Merrill
Speciation is facilitated when traits under divergent selection also act as mating cues. Fluctuations in sensory conditions can alter signal perception independently of adaptation to the broader sensory environment, but how this fine scale variation may constrain or promote behavioural isolation has received little attention. The warning patterns of Heliconius butterflies are under selection for aposematism and act as mating cues. Using computer vision, we extracted behavioural data from 1481 hours of video footage, for...
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