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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/25539

Title: Intersexual Differences in the Strength of Selection on Condition in Drosophila melanogaster
Authors: Zikovitz, Andrea Elizabeth
Advisor: Agrawal, Aneil
Department: Ecology and Evolutionary Biology
Keywords: Evolutionary genetics
Drosophila melanogaster
Sexual selection
Intersexual differences
Issue Date: 31-Dec-2010
Abstract: Variation in condition can result from environmental heterogeneity or genetic variation affecting resource acquisition and processing ability. Although condition should be positively correlated with the fitness of both males and females, the strength of selection on condition may differ between the sexes due to differences in reproductive variance. Sexual selection on male condition has been proposed to reduce mutation load, but only if selection is greater on males than females. To investigate the strength of selection on condition, the quality of the larval environment was used to manipulate the condition of Drosophila melanogaster. Additionally, selection was measured when the availability of key resources for females (live yeast) and males (access to females) were altered. Overall, selection was found to be stronger on males than females. However, selection on males weakened under a female-biased sex ratio, whereas selection on females was not significantly affected by the abundance of live yeast.
URI: http://hdl.handle.net/1807/25539
Appears in Collections:Master
Department of Ecology & Evolutionary Biology - Master theses

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