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Cellular interactions during zebrafish adult stripe formation and implications for pigment pattern evolution
Pigment patterns are among the most striking of traits, yet we know very little about the interactions required for organizing pigment cells during adult pattern formation or how evolutionary changes in pigment cell development generate different patterns. As an adult the zebrafish, <italic>Danio rerio<italic> displays a ...
Evolutionary Dynamics of Pine Squirrels (Tamiasciurus) in Western North America
The evolution of new phenotypes and species is a population genetic process that is governed by four fundamental forces: natural selection, drift, mutation, and gene flow. Ecological genetics is the reciprocal interaction between population genetic theory and empirical observations from nature and the laboratory. Here I present ...
How the chili got its spice: Ecological and evolutionary interactions between fungal fruit pathogens and wild chilies
Most species depend on other species for survival and reproduction, thus coevolution - reciprocal evolutionary change between species - arguably plays a dominant role in the origin and organization of biodiversity. We used a novel model system to study coevolutionary dynamics: wild chili peppers and their fruit-associated ...
The Evolution of Temporal Polyethism
Temporal polyethism is a method of division of labor exhibited by many eusocial insect colonies, where the type of task an individual attempts is correlated with its age. The evolutionary pressures that give rise to this widely-observed pattern are still not fully known. The long generation times of eusocial insects combined ...
Enhancing Evolution: When Spatial Structure and Environmental Change Improve Adaptation
Evolution by natural selection is the primary creative force in biology. In order for populations to thrive, or even survive, requires a continual generative process. An understand of the process of natural selection, its strengths and weaknesses, is necessary for both predictions about the future course of life, as well as ...