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Full-Text Articles in Ecology and Evolutionary Biology
Natural Selection And Its Interactions With Migration And Population Demography: Experiments In Wild Guppy Populations, Dylan Jones Weese
Natural Selection And Its Interactions With Migration And Population Demography: Experiments In Wild Guppy Populations, Dylan Jones Weese
Electronic Theses and Dissertations
In this dissertation I quantify spatial and temporal variation in the pattern and strength of natural selection in wild populations of Trinidadian guppies (Poecilia reticulata), and assess the demographic costs of ongoing contemporary evolution in the form of selection against migrants. First, I describe the results often mark-recapture experiments to test hypotheses concerning the role of natural selection in geographic patterns of trait variation. Previous work has reported that guppies inhabiting high- and low-predation sites differ in both body shape and color. These patterns of phenotypic variation have been theorized to reflect differences in the balance between functional trade-offs among …
The Significance Of The Male Display During Male-Male Interactions In Guppies (Poecilia Reticulata), Rebecca Nuffer, Samantha M. Alburn
The Significance Of The Male Display During Male-Male Interactions In Guppies (Poecilia Reticulata), Rebecca Nuffer, Samantha M. Alburn
Biological Sciences
Guppies, Poecilia reticulata, are a model species for studies of female preference based on male courtship displays; however, males also display to each other in an aggressive context, and little attention has been paid to the role of male-male displays. The display involves a male positioning his body in front or to the side of another male, arching his body, and quivering with his dorsal fin splayed. To understand what behaviors elicit a male display, we assigned individual males a dominance status. We then examined the relationship between dominance status and the number of displays delivered and received. By …