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Full-Text Articles in Medical Sciences
Habitat As A Source Of Intrapopulational Variation Of Ornament Size In Galápagos Lava Lizards (Microlophus Albemarlensis Complex), Mark Jordan, Jennifer Hollis, Paul Stone, Howard Stone
Habitat As A Source Of Intrapopulational Variation Of Ornament Size In Galápagos Lava Lizards (Microlophus Albemarlensis Complex), Mark Jordan, Jennifer Hollis, Paul Stone, Howard Stone
Mark A. Jordan
Gradients in habitat structure are expected to influence the outcome of selection on traits that contribute to communicative display. Galápagos lava lizards (Microlophus albemarlensis complex) on Isla Plaza Sur in the Galápagos Islands occur across a gradient of vegetative cover. Previous work in this population has shown that traits associated with predator avoidance are magnified in habitats with low vegetative cover. This pattern suggests that predation pressure differs by habitat and thus, may act to select against the elaboration of ornamentation. We measured the size of the chin patch, an ornament known to be used in intraspecific signaling, to test …
Island Fragmentation Drives Evolutionary Diversification Of Galápagos Lava Lizards (Microlophus Spp.), Mark Jordan, H. Snell
Island Fragmentation Drives Evolutionary Diversification Of Galápagos Lava Lizards (Microlophus Spp.), Mark Jordan, H. Snell
Mark A. Jordan
No abstract provided.
Phenotypic Divergence Despite High Levels Of Gene Flow In Galapagos Lava Lizards (Microlophus Albemarlensis), Mark Jordan, H. Snell, H. Snell, W. Jordan
Phenotypic Divergence Despite High Levels Of Gene Flow In Galapagos Lava Lizards (Microlophus Albemarlensis), Mark Jordan, H. Snell, H. Snell, W. Jordan
Mark A. Jordan
The extent of evolutionary divergence of phenotypes between habitats is predominantly the result of the balance of differential natural selection and gene flow. Lava lizards (Microlophus albemarlensis) on the small island of Plaza Sur in the Galápagos archipelago inhabit contrasting habitats: dense vegetation on the western end of the island thins rapidly in a transitional area, before becoming absent on the eastern half. Associated with these habitats are phenotypic differences in traits linked to predator avoidance (increased wariness, sprint speed, and endurance in lizards from the sparsely vegetated habitat). This population provides an opportunity to test the hypothesis that reduced …
Historical Fragmentation And Genetic Drift In Populations Of Galápagos Lava Lizards (Microlophus Albemarlensis Complex), Mark Jordan, H. Snell
Historical Fragmentation And Genetic Drift In Populations Of Galápagos Lava Lizards (Microlophus Albemarlensis Complex), Mark Jordan, H. Snell
Mark A. Jordan
No abstract provided.