... tolerance, and suggest that natural selection is shaping the structure of the hybrid zone across the Gulf of Maine. Our limited genomic sampling does not eliminate the strong possibility that mito-nuclear co-adaptation may play a role in the differences in thermal phenotypes documented here. Linkage between...

... expenditure can be in explaining fitness consequences of incubating experimentally enlarged clutches. * Author for correspondence (e-mail: [email protected] ) 13 3 2007 © The Company of Biologists Limited 2007 2007 clutch size manipulation energy expenditure natural selection...

...Martin E. Feder SUMMARY A longstanding challenge for biologists has been to explain not just how organisms are adapted to diverse environments, but how these adaptations arise. Although natural selection is clearly sufficient to act on heritable variation, is this heritable variation sufficient...

... glucocorticoid elevation is associated with anti-predator behavior. * Author for correspondence (e-mail: [email protected] ) 5 9 2006 © The Company of Biologists Limited 2006 2006 acoustic startle predation eavesdropping natural selection stress communication corticosterone...

... attempt at overthrowing the Modern Synthesis paradigm, and some fundamental conceptual confusion about the proper roles of phenotypic plasticity and natural selection within evolutionary theory. * Author for correspondence (e-mail: [email protected] ) 3 1 2006 ©...

... affects the strength and direction of natural selection. Ecological interactions mediated through phenotypic plasticity are ubiquitous in nature, and the potential evolutionary consequences of these interactions illustrate the complexity inherent in understanding evolution in a community context...

... target for natural selection. We tested whether BMR was repeatable over a considerable time of the lifespan of a small passerine bird: the zebra finch Taeniopygia guttata . BMR was measured six times over a 2.5 year period in captive zebra finches. BMR residuals showed significant repeatabilities over...

... known is when and in what sequence these shifts occur. fish zebrafish Danio rerio gill development ontogeny respiration ionoregulation oxygen natural selection evolution © The Company of Biologists Limited 2002 2002 28 3 2002 * e-mail: [email protected] ...

... heritable and highly variable in natural populations and hence susceptible to natural selection. Some field studies have demonstrated significant positive associations between activity capacities, particularly burst speed, and survivorship; other studies have not. The potential for such selection therefore...