Organisms with complex life-cycles often experience very different environments in different phases of their life. Genes expressed in more than one phase could potentially create a conflict or constraint on evolutionary change if the pattern of selection on those genes were different in the different phases. The potential importance of this type of constraint across metamorphosis in frogs was a...

• ···•••••••••••••••• l . . Acknowledgments;," • • • • • • • • • • • 2 Introduction ................ • ·.3 Materials .and Methods ••••• · •• 4 Observations ••••• ~~···•••••• 6 Discussion •••••••••••••••••• 11 Literature Cited •••••••••••• 17 Abbreviations for figures ••• 18 Figures •• ••••••••••·••••••••• 19 Vita;.•••• ••• ~.•••~.••••,•••.•• .39

The physical and environmental attributes of landscapes often shape patterns of population connectivity by influencing dispersal and gene flow. Landscape effects on movement are typically evaluated for single species. However, inferences from multiple species are required for multi-species management strategies increasingly being applied in conservation. In this study, I compared the spatial ge...

Chinese tallow (Triadica sebifera (L.) Small) is an aggressive invasive tree species that can be abundant in parts of its non-native range. This tree species has the capability of producing monocultures, by outcompeting native trees, which can be in or near wetlands that are utilized by breeding amphibians. Existing research suggests that leaf litter from invasive Chinese tallow reduces surviva...

Members of the genus Ranavirus (family Iridoviridae) can cause catastrophic mortality of pond-breeding amphibians and are associated with an emerging infectious disease that may be contributing to amphibian declines. We conducted three experiments to examine factors that may affect transmission both within and between local breeding populations of the wood frog (Rana sylvatica). In a laboratory...

CHURCHILL, T.A., and STOREY, K.B. 1994. Metabolic responses to dehydration by liver of the wood frog, Rana sylvatica. Can. J. Zool. 72: 14201425. The metabolic responses by the liver to the evaporative loss of up to 60% of total body water were quantified in spring-collected wood frogs, Rana sylvatic*~, a freeze-tolerant species. Dehydration stimulated rapid hyperglycemia, liver glucose levels ...