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Publications [#339287] of Kim Valenta

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Journal Articles

  1. Nevo, O; Valenta, K; Razafimandimby, D; Melin, AD; Ayasse, M; Chapman, CA, Frugivores and the evolution of fruit colour., Biology Letters, vol. 14 no. 9 (September, 2018) [doi]
    (last updated on 2019/07/20)

    Abstract:
    The ecological function of fruit colour has been the focus of many studies. The most commonly tested hypothesis is that fruit colour has evolved to facilitate detection by seed-dispersing animals. We tested whether distributions of fruit colours are consistent with the hypothesis that colour is an evolved signal to seed dispersers using a comparative community approach. We compared the contrast between ripe fruits and leaf backgrounds at two sites, one in Madagascar where seed dispersers are primarily night-active, red-green colour-blind lemurs, and the other in Uganda, where most vertebrate seed dispersers are day-active primates and birds with greater capacity for colour vision. We show that fruits in Uganda have higher contrast against leaf background in the red-green and luminance channels whereas fruits in Madagascar contrast more in the yellow-blue channel. These results indicate that fruit colour has evolved to contrast against background leaves in response to the visual capabilities of local seed disperser communities.


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