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Full-Text Articles in Life Sciences
Understanding The Diversification Of Central American Freshwater Fishes Using Comparative Phylogeography And Species Delimitation, Justin C. Bagley
Understanding The Diversification Of Central American Freshwater Fishes Using Comparative Phylogeography And Species Delimitation, Justin C. Bagley
Theses and Dissertations
Phylogeography and molecular phylogenetics have proven remarkably useful for understanding the patterns and processes influencing historical diversification of biotic lineages at and below the species level, as well as delimiting morphologically cryptic species. In this dissertation, I used an integrative approach coupling comparative phylogeography and coalescent-based species delimitation to improve our understanding of the biogeography and species limits of Central American freshwater fishes. In Chapter 1, I conducted a literature review of the contributions of phylogeography to understanding the origins and maintenance of lower Central American biodiversity, in light of the geological and ecological setting. I highlighted emerging phylogeographic patterns, …
Generality Of The Terminal Investment Hypothesis: Effects Of Extrinsic Mortality And Resource Availability On Age-Related Reproductive Investment, Allystair Jones
Generality Of The Terminal Investment Hypothesis: Effects Of Extrinsic Mortality And Resource Availability On Age-Related Reproductive Investment, Allystair Jones
Theses and Dissertations
A central question in life history theory is, what combination of traits and behaviors will lead to the highest reproductive success throughout a lifetime. The trade-off between current and future reproduction is central to the lifetime reproductive success of an organism. If there is a cost to reproduction, then allocation of energy to current reproduction will come at a cost to future reproduction. We expect young individuals to favor future reproduction over current reproduction and that balance shifts to current reproduction as they age (i.e. terminal investment hypothesis). However, how this transition from an emphasis on future reproduction to emphasis …