Navara, Kristen J.; Hill, Geoffrey E. - In: Behavioral Ecology 14 (2003) 6, pp. 909-916
Carotenoid pigments can directly enhance the immune responses of vertebrates, and they are used by many animals to create ornamental color displays. It has been hypothesized that these two functions of carotenoid pigments are linked: animals must trade off use of carotenoid pigments for immune...