Publications

a role for phenotypic plasticity in the evolution of aposematism.	the evolution of warning coloration (aposematism) has been difficult to explain because rare conspicuous mutants should suffer a higher cost of discovery by predators relative to the cryptic majority, while at frequencies too low to facilitate predator aversion learning. traditional models for the evolution of aposematism have assumed conspicuous prey phenotypes to be genetically determined and constitutive. by contrast, we have recently come to understand that warning coloration can be environm ...	2002	12204123
the importance of the ontogenetic niche in resource-associated divergence: evidence from a generalist grasshopper.	geographic variation in resource use can produce locally adapted populations that exhibit genetic and phenotypic divergence. in the bird-winged grasshopper (schistocerca emarginata = [lineata]), we investigate whether genetic data exist in accordance with geographic variation in resource (host) use and coloration. in texas, juvenile grasshoppers feed almost exclusively on one of two host plants, rubus trivialis (rosaceae) or ptelea trifoliata (rutaceae), whereas adults of both forms are dietary ...	2002	12038531