It's not just what you have, but how you use it: solar-positional and behavioural effects on hummingbird colour appearance during courtship
| Autor: | Kevin J. McGraw, Richard K. Simpson |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
0301 basic medicine Male genetic structures media_common.quotation_subject Color 010603 evolutionary biology 01 natural sciences Courtship Birds 03 medical and health sciences Sexual Behavior Animal biology.animal Animals Mating Ecology Evolution Behavior and Systematics media_common biology Ecology Pigmentation Ornaments Feathers biology.organism_classification Reflectivity 030104 developmental biology Calypte costae Plumage Evolutionary biology Hummingbird |
| Zdroj: | Ecology letters. 21(9) |
| ISSN: | 1461-0248 |
| Popis: | Animals exhibit a diversity of colours that can play key roles in mating interactions. However, we presently lack an understanding of the relative importance of the environment, behaviour and natural reflective properties of colourful ornaments in shaping an individual's colour appearance during mating displays. We investigated interactions among structurally based plumage, display environments and courtship shuttle displays of male Costa's hummingbirds (Calypte costae) to test how these elements may differentially contribute to colour appearance during shuttles. Male position relative to the sun was the strongest predictor of colour appearance, with shuttle behaviours and feather reflectance playing smaller roles. Furthermore, male solar orientation and shuttling behaviour (e.g. shuttle width) were repeatable among displays, whereas male colour appearance mostly was not. These results emphasise the contributions of behaviour and environment to colour-signalling and suggest that relying on reflectance measurements of colourful ornaments alone provides an incomplete picture of ecologically relevant visual phenotypes of displaying animals. |
| Databáze: | OpenAIRE |
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