LEE, Carol Eunmi; University of Wisconsin, Madison: Selection and Physiological Evolution during Biological Invasion Events Invasive species serve as excellent models for studying rapid evolution in response to new environments. Recent invasions of fresh water have occurred multiple times independently in the copepod species complex Eurytemora affinis, providing replicated tests of physiological adaptation. Work in […]

BRODIE III, Edmund D.; BRODIE, JR., Edmund D.; RIDENHOUR, B. J.; Indiana University; Utah State University; Indiana University: Reciprocal selection at the phenotypic interface of coevolution Coevolutionary interactions between species depend upon a phenotypic interface of traits in each species that mediate the outcome of interactions among individuals. These phenotypic interfaces usually involve performance traits, […]

SINERVO, Barry; CALSBEEK, Ryan; HAZARD, Lisa; Univ. of California, Santa Cruz; Univ. of California, Los Angeles; Univ. of California, Santa Cruz: Ontogenetic Conflict Between the Sexes and Selection on Life History and Performance Traits Intersexual ontogenetic conflict arises when an allele�s fitness optimum differs between the sexes. Conflict is increasingly recognized as an important means […]

HUEY, R.B.*; GILCHRIST, G.W.; Univ. of Washington, Seattle; College of William & Mary: Mutation accumulation, performance and fitness in Drosophila melanogaster Studies of the �physiology-performance-fitness� paradigm typically monitor natural variation in physiology and/or performance and then search for correlations with indices of fitness. Here we take a very different approach to testing this paradigm. We […]

ARNOLD, Stevan J.; Oregon State University: Multivariate stabilizing selection on morphology and performance Theoretical discussions of morphology, performance and fitness have treated only the case of directional (linear) selection. Under a variety of circumstances it seems likely that (1) morphology has a curvilinear relationship to performance and (2) performance has a curvilinear relationship to fitness. […]

GHALAMBOR, C,K*; WALKER, J.A.; REZNICK, D.N.; Univ. of California, Riverside; Univ. of Southern Maine, Portland; Univ. of California, Riverside: Multi-trait selection, adaptation, and constraints on the evolution of performance: An empirical example using Trinidadian guppies The conceptual relationship between morphology, performance, and fitness has served as a useful paradigm for understanding the consequences of phenotypic […]

WIKELSKI, Martin C; Princeton Univ., Princeton: MORPHOLOGY, PERFORMANCE AND FITNESS IN GALAPAGOS MARINE IGUANAS Patterns of selection in a natural population of vertebrates had deterministic and stochastic elements in the short term. Over longer time scales, this combination of selective forces resulted in directional evolutionary change of morphology as well as in the formation of […]

PODOLSKY, R D; University of North Carolina: Integrating development and environment to model reproductive performance in natural populations of a marine gastropod Marine environments pose challenges to the study of invertebrate early life-histories, owing to the physical heterogeneity and inaccessibility of many habitats and the prevalence of early dispersal stages. Much of what is known […]

KINGSOLVER, J.G.*; GOMULKIEWICZ, R.; University of North Carolina, Chapel Hill; Washington State University: Environmental variation and selection on performance curves Many aspects of physiological and organismal performance vary with some continuous environmental variable: e.g. photosynthetic rate as a function of light intensity; growth rate or sprint speed as a function of temperature. For such performance […]

SCHMITT, J; STINCHCOMBE, J; HUBER, H; Brown University; Brown University; University of Nijmegan: Adaptive evolution of shade avoidance responses in natural plant populations Many plant species exhibit stem elongation and other developmental responses to the decreased ratio of red: far red wavelengths (R:FR) characteristic of foliage shade. This “shade avoidance” response, mediated by phytochrome photoreceptors, […]