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Full-Text Articles in Life Sciences
Multispecies Character Displacement In Mexican Poeciliopsis Fishes, Andrea J. Roth
Multispecies Character Displacement In Mexican Poeciliopsis Fishes, Andrea J. Roth
Theses and Dissertations
Competition has long been recognized as a central force in shaping evolution, particularly through character displacement. Yet research on character displacement is biased as it has focused almost exclusively on pairs of interacting species while ignoring multispecies interactions. Unfortunately, communities are seldom so simple that only pairs of species interact, and it is not clear if inferences from pairwise interactions are sufficient to explain patterns in nature. A more realistic approach is to ask how traits evolve when multiple species interact. Here I explore the importance of multispecies competitive interactions on trait evolution in four congeneric species of livebearing fishes …
Space Use And Annual Survival Of Hybridized Mouflon Sheep In Hawaii And Comparing Estimates Of Population Size Through Instantaneous Sampling And Photographic Capture-Recapture, Bradley Jay Adams
Theses and Dissertations
Significant efforts in conservation are devoted to the management and study of ungulates, due to their significant roles in ecosystems as well as their potential economic value. This is especially true for species considered exotic, such as mouflon sheep (Ovis musimon) in Hawaii. Effective management of an exotic species requires an understanding of ecological metrics such as space use, survival, and population size. We provided these metrics for a population of mouflon that have hybridized with feral sheep (Ovis aries) on the island of Hawaii. In Chapter 1, we quantified space use and annual survival of sheep in an area …