TY - JOUR
T1 - I see your false colours
T2 - How artificial stimuli appear to different animal viewers
AU - Stoddard, Mary Caswell
AU - Miller, Audrey E.
AU - Eyster, Harold N.
AU - Akkaynak, Derya
N1 - Funding Information:
plementary material. Authors’ contributions. M.C.S., A.E.M., H.N.E. and D.A. conceived and planned the study, collected and analysed the data and produced figures and tables. M.C.S. wrote the manuscript, to which all authors contributed. Competing interests. We declare we have no competing interests. Funding. Funding to M.C.S. was provided by Princeton University and a Sloan Research Fellowship. Acknowledgements. We thank the Editor and three anonymous reviewers for constructive suggestions. We are grateful to Ben Hogan for assistance in creating figures. We also thank members of the Stoddard Laboratory for discussion and feedback.
Publisher Copyright:
© 2018 The Author(s) Published by the Royal Society. All rights reserved.
PY - 2019/2/6
Y1 - 2019/2/6
N2 - The use of artificially coloured stimuli, especially to test hypotheses about sexual selection and anti-predator defence, has been common in behavioural ecology since the pioneering work of Tinbergen. To investigate the effects of colour on animal behaviour, many researchers use paints, markers and dyes to modify existing colours or to add colour to synthetic models. Because colour perception varies widely across species, it is critical to account for the signal receiver's vision when performing colour manipulations. To explore this, we applied 26 typical coloration products to different types of avian feathers. Next, we measured the artificially coloured feathers using two complementary techniques-spectrophotometry and digital ultraviolet-visible photography-and modelled their appearance to mammalian dichromats (ferret, dog), trichromats (honeybee, human) and avian tetrachromats (hummingbird, blue tit). Overall, artificial colours can have dramatic and sometimes unexpected effects on the reflectance properties of feathers, often differing based on feather type. The degree to which an artificial colour differs from the original colour greatly depends on an animal's visual system. 'White' paint to a human is not 'white' to a honeybee or blue tit. Based on our analysis, we offer practical guidelines for reducing the risk of introducing unintended effects when using artificial colours in behavioural experiments.
AB - The use of artificially coloured stimuli, especially to test hypotheses about sexual selection and anti-predator defence, has been common in behavioural ecology since the pioneering work of Tinbergen. To investigate the effects of colour on animal behaviour, many researchers use paints, markers and dyes to modify existing colours or to add colour to synthetic models. Because colour perception varies widely across species, it is critical to account for the signal receiver's vision when performing colour manipulations. To explore this, we applied 26 typical coloration products to different types of avian feathers. Next, we measured the artificially coloured feathers using two complementary techniques-spectrophotometry and digital ultraviolet-visible photography-and modelled their appearance to mammalian dichromats (ferret, dog), trichromats (honeybee, human) and avian tetrachromats (hummingbird, blue tit). Overall, artificial colours can have dramatic and sometimes unexpected effects on the reflectance properties of feathers, often differing based on feather type. The degree to which an artificial colour differs from the original colour greatly depends on an animal's visual system. 'White' paint to a human is not 'white' to a honeybee or blue tit. Based on our analysis, we offer practical guidelines for reducing the risk of introducing unintended effects when using artificial colours in behavioural experiments.
KW - Animal coloration
KW - Animal vision
KW - Artificial stimuli
KW - Sensory ecology
KW - Spectrophotometry
KW - Ultraviolet digital photography
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U2 - 10.1098/rsfs.2018.0053
DO - 10.1098/rsfs.2018.0053
M3 - Article
C2 - 30603072
AN - SCOPUS:85061440345
SN - 2042-8898
VL - 9
JO - Interface Focus
JF - Interface Focus
IS - 1
M1 - 20180053
ER -