Chemical defences indicate bold colour patterns with reduced variability in aposematic nudibranchs.
Détails
Etat: Public
Version: Final published version
Licence: CC BY 4.0
ID Serval
serval:BIB_8CF2120C7017
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Chemical defences indicate bold colour patterns with reduced variability in aposematic nudibranchs.
Périodique
Proceedings. Biological sciences
ISSN
1471-2954 (Electronic)
ISSN-L
0962-8452
Statut éditorial
Publié
Date de publication
08/2024
Peer-reviewed
Oui
Volume
291
Numéro
2027
Pages
20240953
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Publication Status: ppublish
Résumé
The selective factors that shape phenotypic diversity in prey communities with aposematic animals are diverse and coincide with similar diversity in the strength of underlying secondary defences. However, quantitative assessments of colour pattern variation and the strength of chemical defences in assemblages of aposematic species are lacking. We quantified colour pattern diversity using quantitative colour pattern analysis (QCPA) in 13 dorid nudibranch species (Infraorder: Doridoidei) that varied in the strength of their chemical defences. We accounted for the physiological properties of a potential predator's visual system (a triggerfish, Rhinecanthus aculeatus) and modelled the appearance of nudibranchs from multiple viewing distances (2 and 10 cm). We identified distinct colour pattern properties associated with the presence and strength of chemical defences. Specifically, increases in chemical defences indicated increases in colour pattern boldness (i.e. visual contrast elicited via either or potentially coinciding chromatic, achromatic and/or spatial contrast). Colour patterns were also less variable among species with chemical defences when compared to undefended species. Our results indicate correlations between secondary defences and diverse, bold colouration while showing that chemical defences coincide with decreased colour pattern variability among species. Our study suggests that complex spatiochromatic properties of colour patterns perceived by potential predators can be used to make inferences on the presence and strength of chemical defences.
Mots-clé
Animals, Gastropoda/physiology, Color, Predatory Behavior, Pigmentation, Biological Mimicry, aposematism, crypsis, defensive animal colouration, escape and radiate, predator psychology, signal honesty
Pubmed
Web of science
Open Access
Oui
Création de la notice
19/07/2024 11:25
Dernière modification de la notice
20/08/2024 7:22