Color as an assessment signal in the black-winged damselfly

dc.contributor.advisorGetty, Thomas Reed
dc.contributor.authorRockwell, Sarah M.
dc.description1 broadside ; ill.
dc.description.abstractBackground: - Signals are a form of animal communication important in intraspecific interactions. An assessment signal conveys information about the condition of a conspecific. - There is a selective advantage for males that can accurately assess an opponent’s relative fighting ability during a contest, and for females that can choose the most fit male to mate with. - Reliable assessment signals evolve due to the mutual benefits of avoiding the high energetic costs of fighting. Life History: - Adult male damselflies defend streamside territories to attract mates, a strategy known as resource defense polygyny. - Aggressive encounters between territorial males include chasing, face-off displays, and spiral fights. Previous Studies: - Fat reserves in damselflies are a good predictor of fight outcomes (Marden & Waage 1990, Marden & Rollins 1994). - The published data is divided on whether damselflies can assess relative fighting abilities in a contest. - Fitzstephens & Getty (2000) proposed abdomen color as a possible mechanism for assessment, and found that males with high fat contents were significantly more likely to be blue.en
dc.description.sponsorshipW.K. Kellogg Biological Station
dc.description.sponsorshipKalamazoo College. Department of Biology. Diebold Symposium, 2002
dc.description.tableofcontentsIntroduction -- Hypotheses -- Materials and methods -- Results -- Conclusions
dc.publisherKalamazoo College
dc.subject.lcshColor of animals
dc.titleColor as an assessment signal in the black-winged damselflyen