We have developed several new techniques, including video endoscopy and underwater time-lapse, to assess feeding activity in the laboratory and in the field using a variety of artificial and natural food particles. Studies on marine bivalves, such as scallops, clams, mussels and oysters are of particular interest because of their ecological significance and commercial value in wild fisheries. Many of these species of molluscan shellfish are being evaluated for their potential to support aquaculture industries in Atlantic Canada. Primarily, we are interested in the effects, and mechanisms of action, of environmental ndocrine disruptors. A past project investigated the reproductive endocrine status of escapee aquaculture Atlantic salmon in a near-by spawning river.
Opportunities exist in the lab for new graduate and Honours students.
My primary research interests are concerned with communication and behaviour of marine mammals with particular emphasis on underwater acoustical communication of seals. Some polar seal species can, under optimal conditions, communicate over distances of 25 km. The vast majority of underwater vocalizations have a much shorter range however. The tendency for many seal species to form large breeding herds often results in very high numbers of simultaneous underwater calls. Other studies will examine the possible influences of underwater sounds from acoustic deterrent devices used at aquaculture cage sites on the behaviour and distribution of seals and harbour porpoises in the Bay of Fundy, Canada.