My research integrates across fields (ecology, evolution, physiology, morphology) and approaches (natural history, field and laboratory experiments) to advance our understanding of the generation, maintenance, loss, and recovery of aquatic biodiversity.
Currently, my major thematic focus is the study of evolutionary and ecological consequences of respiratory strategies in fishes and, more generally, the influence of the physical environment on faunal isolation and reunification (see Respiratory Ecology).
My second major area of interest is aquatic conservation, and in this field I have focused on understanding the importance of the physico-chemical environment in modulating impacts of introduced predators in aquatic communities and, more generally, the impacts of species introductions on fish faunal structure, richness, and diversification (see Aquatic Conservation).
I have conducted field research in Canada, Barbados, Costa Rica, and Uganda. Currently, I work primarily in East Africa, on the rivers, wetlands, and lakes of western Uganda and the Lake Victoria basin; and I have established a long-term field research base in Kibale National Park, Uganda.