In terrestrial habitats, traffic noise is responsible for chronic noise exposure and impacts both signal detection and acoustic signal structure. Several species are known to adapt their call structures to cope with noise. However, compromised hearing affects more than acoustic communication, and noise should be consider as a stress factor that can also alter visual communication in the case of carotenoid-based signals. Here, we experimentally investigated the impact of traffic noise on the expression of secondary sexual signals in the European treefrog, Hyla arborea. Treefrogs use multimodal communication in the sexual selection process (mating calls and vocal sac colouration). We found that treefrogs seem unable to adjust their call structure. Nonetheless, males showed a significant decrease in colouration intensity. Our findings highlight for the first time the negative effect of traffic noise on colour signals. This suggests that anthropogenic noise could affect a wider range of species than previously thought.
Diurnal variation in the responsiveness of the hypothalamic-pituitary-adrenal axis of the male rat to noise stress. —
Experimental chronic noise is related to elevated fecal corticosteroid metabolites in lekking male greater sage-grouse (Centrocercus urophasianus). —
Plos One7: e50462.
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Support for a role of colour vision in mate choice in the nocturnal European treefrog (Hyla arborea). —
The role of nocturnal vision in mate choice: females prefer conspicuous males in the European tree frog (Hyla arborea). —
Proc. Roy. Soc. Lond. B Biol.276:
How do king penguins (Aptenodytes patagonicus) apply the mathematical theory of information to communicate in windy conditions? —
Proc. Roy. Soc. Lond. B: Biol. Sci.266:
PirreraS.De ValckE.CluydtsR. (2011).
Nocturnal road traffic noise assessment and sleep research: the usefulness of different timeframes and in- and outdoor noise measurements. —
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Anthropogenic noise as a stressor in animals: a multidisciplinary perspective. —
Int. J. Comp. Psychol.20: