1) Ecology of littoral zones in lakes, especially the role of spatial complexity in limiting energy flow from bottom invertebrates to fish.
2) Among-lake life history variation in yellow perch and walleye; the contribution of differences in the energetic cost of activity in determining differences in growth rates among fish populations.
3) Impact of the round goby (an exotic fish from eastern Europe) on the shallow water fish community of southern Georgian Bay, Lake Huron.

4) Warmwater fish ecology in small coastal embayments of Lake Ontario.

Selected Publications