Research Projects

Accoustic Tagging

Toronto and Region Conservation Authority (TRCA) in cooperation with Fisheries and Oceans Canada (DFO) Science Group monitor the abundance and health of the fish populations within the jurisdiction of Toronto.  The method of monitoring to date has primarily been by sampling the fish with different gear types and methods that show the fish community inhabiting the different areas around the jurisdiction.  In the interest of obtaining information on the behavior and habitat utilization of the fish community inhabiting the Toronto Harbour the TRCA in conjunction with researchers from DFO and Carleton University have undertaken an acoustic fish study. The objectives of the study are:

•Assess pre- and post-restoration movements and habitat use
•Identify habitats favoured by native over non-native species
•Collect pre-restoration data
•Assess residency
•Identify key areas of use by season

TRCA, DFO and Carleton University have deployed receivers in pre-determined locations within and around the Toronto Inner Harbour as part of the ongoing fisheries monitoring program. The receivers will communicate with surgically implanted tags in the fishes allowing us to track the habitat utilization by these marked fish.  Tags have been implanted in the following species: Largemouth Bass, Northern Pike, Walleye, adn Yellow Perch. The receiver deployment locations have been selected to allow us to accurately triangulate the position of the fish around the inner harbor concentrating on potential fish habitat locations. This is an on going reasearch project.

Fish Community Monitoring

During the spring, summer and autumn TRCA monitors the Lake Ontario fish communites within their jursidiction.  They monitor the fish community to determine composition, abundance of the fishes found by electrofishing. Sampling occurs on an annual basis.

Why do we monitor:

•Biophysical inventories are the foundation of sound environmental planning and assessments.
•Environmental monitoring is often required before, during and following construction activities to ensure that habitat mitigation and compensation objectives are achieved.
•Often used to obtain appropriate regulatory approvals and permits.
•Long-term or compliance monitoring is required to evaluate the success or effectiveness of habitat compensation, or to measure long-term environmental effects.
•Supports research efforts.