Harvest Advisories

Notification of Fish Consumption Risk in Algonquin Provincial Park

This advisory concerns two ongoing fisheries research projects lead by the Ministry of Natural Resources and Forestry (MNRF) and Fisheries and Oceans Canada (DFO) in Algonquin Provincial Park. As part of this research fish have been tagged and secondarily marked with a clip of their adipose fin. During the tagging process, fish are anesthetized using a chemical called “Tricaine methane-sulfonate (MS-222)”. This anesthetic chemical is not safe for human consumption and will remain in fish tissue for some time after exposure. The recommended withdrawal time of MS-222 varies among countries (e.g. 21 days in USA, 5-14 days in Canada). However, a precautionary buffer of 30 days is advised. Further information regarding each project, including tagging dates is included below:

Petawawa River Watershed Fish Tracking Study
DFO is conducting a fish tracking study in the Petawawa River watershed to study fish movement throughout the system. As part of this project, brook trout were anesthetized and tagged in mid-August in a section of the Crow River (see attached figures). As such, these tagged fish will not be safe for consumption until September 19, 2022 (30 days post exposure). With water temperatures cooling, these fish will have likely travelled further throughout the river system. The fish were too small for external identifier tags but did have adipose fins clipped. They will also contain an internal body cavity tag that may be stuck to the rib lining or internal fatty tissues. Signage with information about the project will be posted in the work area in September.


Stringer Lake Brook Trout Study
Harkness Laboratory of Fisheries Research (MNRF) is conducting a brook trout research project on Stringer Lake. While Stringer Lake is currently managed as a Sanctuary Lake, should a tagged fish be caught, please be aware that fish were tagged in the lake on August 16th and 17th and will not be safe for consumption until September 17, 2022 (30 days post exposure). It is asked that if a tagged fish is harvested, that the external tag number be reported to nick.lacombe@ontario.ca.