Fitness costs of signalling are essential in order for reliable sexual signalling to prevail when the interests of the sexes conflict. This means that signalling can be subjected to a life history trade-off between present and future signalling effort. Here, I show that three-spined stickleback males (Gasterosteus aculeatus), who have a single breeding season during which they breed repeatedly,...

It has been recently proposed that the blue-green coloration in eggs of many avian species may constitute a sexually selected female signal. Blue-green color intensity would reflect the physiological condition of females, and hence it might also affect the allocation of male parental care. In this study, we use three different experimental approaches to explore the importance of sexual selectio...

Citation: Mahr K, Evans C, Thonhauser KE, Griggio M and Hoi H (2016) Multiple Ornaments—Multiple Signaling Functions? The Importance of Song and UV Plumage Coloration in Female Superb Fairy-wrens (Malurus cyaneus). Front. Ecol. Evol. 4:43. doi: 10.3389/fevo.2016.00043 Multiple Ornaments—Multiple Signaling Functions? The Importance of Song and UV Plumage Coloration in Female Superb Fairy-wrens (...

We have demonstrated electroswitchable emission and coloration using a novel composite material containing luminescent europium(III) complex Eu(hfa)(3)(H(2)O)(2) and diheptyl viologen HV(2+). The photoluminescence of the Eu(III) complex was controlled by the electrochemical coloration of HV(2+)via intermolecular energy transfer mechanisms.

Methods to produce colored surfaces using physical mechanisms are proposed, with aluminum used as a demonstration vehicle. Our approach aims to achieve tunable, vibrant colors through the interaction of three well-established physical mechanisms of color formation, namely (1) resonant scattering and interference effects in a nano-structured surface (e.g. via anodization of aluminum), (2) plasmo...

RÉSUMÉ : Dans cet article nous étudions le problème de la somme coloration minimale (MSCP) qui consiste à trouver une coloration des sommets d’un graphe, utilisant des entiers naturels, telle que la somme des couleurs est minimale. Nous présentons une synthèse des travaux sur MSCP, ainsi qu’une nouvelle famille d’algorithmes gloutons pour MSCP. Nous proposons une étude de bornes inférieures bas...

BACKGROUND The exceptional diversity of coloration found in avian eggshells has long fascinated biologists and inspired a broad range of adaptive hypotheses to explain its evolution. Three main impediments to understanding the variability of eggshell appearance are: (1) the reliable quantification of the variation in eggshell colours; (2) its perception by birds themselves, and (3) its relation...

spatial frequencies (as projected onto the retina) and these will dominate perceptual grouping mechanisms. With increasing distance, the highest frequencies are lost, and the components of the visual scene to which the viewer is most sensitive change systematically [10]. The multi-scale processing of images has been exploited to create hybrid pictures that vary with distance in, for example, pe...