I am generally interested in how fish (and sometimes other aquatic organisms) are affected by different environmental stressors. These stressors include things like low oxygen, parasites, waves and fluctuating water flow,  high salinity, etc. I try to figure out what effects these stressors have on populations of fishes in terms of their morphology, physiology and behaviour. I am especially interested in variation within species (intraspecific differences) along natural environmental gradients.

Distribution and abundance of benthic algae (periphyton). In particular, my recent research is centered on 1) the effects of residential development on the littoral algae and invertebrates of Quebec lakes, 2) the distribution of filamentous algae and benthic cyanobacteria in the St. Lawrence River and implications of their proliferation on the chemistry and trophy of the river, 3) the response of diatom communities to metal pollution and their utilisation as early indicators of ecosystem recovery.