The evolution of anterior coloration in carnivorans
- 545 Downloads
Some carnivorans have striking patches of fur on their faces (spots, bands, eye masks) and blazes on their chests that are primarily visible from a frontal view. We tested five hypotheses to explain the evolution of the complexity and contrast of these color patches. These were: signals of species identity to avoid hybridization, communication between conspecifics, signals used to warn of defensive anal secretions, signals of belligerence or pugnacity, and camouflage-related coloration used to break up the outline and facial features of the predator when approaching prey. Using phylogenetically controlled multifactorial analyses in six different families of carnivorans, examined separately, our analyses uncovered significant positive associations between measures of color pattern complexity and sociality across herpestid faces and canid chests, suggesting use in social communication. Mustelid facial color complexity was associated with ability to direct anal secretions accurately at predators, and facial markings were significantly or marginally associated with pugnacity in mustelids, viverrids, and herpestids. Facial complexity of viverrid and herpestid species was significantly or marginally related to a mammal-based diet. In ursids, facial contrast appeared less variable in species living in greater sympatry with other bears. Facial and chest coloration in Carnivora appears to have evolved under different selection pressures in different families.
The reasons that many carnivorans have colorful and memorable faces and chests are not yet understood. Here, we pit five different hypotheses against each other: species recognition, advertising either toxic anal defenses or pugnacity, recognizing group members, and trying to remain concealed when approaching mammalian prey. We find that measures of facial and chest complexity and contrast have evolved for different reasons depending on the carnivoran family. Anterior coloration appears to be involved with social communication in herpestids and canids; facial coloration is associated noxious secretions in mustelids, with pugnacity in mustelids, viverrids and herpestids; with reliance on a mammal-based diet in viverrids and herpestids; and with avoiding hybridization in bear species. There is no overriding evolutionary explanation for varied facial and chest pelage coloration across carnivorans.
KeywordsCarnivores Chests Color complexity Contrast Faces
We thank anonymous reviewers for their comments.
Compliance with ethical standards
All sources of data were from the literature or the web and did not involve ethical approval. There was no funding for this project.
Conflict of interest
The authors declare that they have no conflict of interest.
All data generated or analyzed during this study are included in the supplementary information files.
- Allen WL, Cuthill IC, Scott-Samuel N, Baddeley R (2010) Why the leopard got its spots: relating pattern development to ecology in felids. Proc R Soc B (2011) 278:1373–1380. https://doi.org/10.1098/rspb.2010.1734
- Cott HB (1940) Adaptive coloration in animals. Methuen & Co. Ltd, LondonGoogle Scholar
- Francis CM (2008) A guide to the mammals of Southeast Asia. Princeton University Press, PrincetonGoogle Scholar
- Hunter L (2011) Carnivores of the world. Princeton University Press, Princeton, NJGoogle Scholar
- Kingdon J (1977) East African mammals. 3, part a (carnivores). Academic Press, LondonGoogle Scholar
- Myers P, Espinosa R, Parr CS, Jones T, Hammond GS, Dewey TA (2013) The Animal Diversity Web (online), www.animaldiversity.org
- Nowak RM (1999) Walker’s mammals of the world, 6th edn. Johns Hopkins University Press, BaltimoreGoogle Scholar
- Orme D, Freckleton R, Thomas G, Petzoldt T, Fritz S, Isaac N, Pearse W (2012) Caper: comparative analysis of phylogenetics and evolution in R. R package version 0.5, http://CRAN.R-project.org/package=caper
- Ortolani A, Caro T (1996) The adaptive significance of color patterns in carnivores: phylogenetic tests of classic hypotheses. In: Gittleman JL (ed) Carnivore behavior, ecology and evolution, vol II. Cornell University press, Ithaca, New York, pp 132–188Google Scholar
- Van Dyck S (2006) In: Strahan R (ed) The mammals of Australia. New Holland Publishing, SydneyGoogle Scholar
- Wilson DE, Mittermeier RA (2009) Handbook of the mammals of the world, vol 1. Carnivores. Lynx Edicions, BarcelonaGoogle Scholar
- Wilson DE, Reeder DM (eds) (2005) Mammal species of the world: a taxonomic and geographic reference. John Hopkins University Press, BaltimoreGoogle Scholar