Updated 2025-03-24 17:16:28
Lake Huron -> 1.0 Salmonine (Salmon and Trout) -> Lake Trout Mortality
Reporting Interval
2018 - 2022
Area
Ontario waters
Meeting Target?
Meets
Indicator Trend
No trend
Confidence?
High
1.2.6. Mortality of Lake Trout in Ontario waters
Ebener (1993) recommended that Lake Trout 5-year average survival rates should be at least 60% (i.e., mean annual mortality no greater than 40%). Lake Trout mortality estimated from commercial fishery samples in Ontario waters varies by basin but, with limited exceptions, has remained below the maximum threshold since the early 2000s (Figure 1).
Total annual mortality (%) in Ontario waters of Lake Huron by lake basin. The Lake Trout recovery strategy for Lake Huron calls for total annual mortality to remain at or below 40% (Ebener 1998).
Methodology
Data provided by the Upper Great Lakes Management Unit (UGLMU) of the Ontario Ministry of Natural Resources (MNR). Lake Trout mortality estimates were summarized from biological samples collected from the commercial fishery. Catch-curve regression was used to estimate total annual mortality expressed as a percent. Commercial catch sampling has been conducted annually since 1975. Onboard observations of catches and biological sampling of fish from Lake Huron commercial fishing vessels was conducted by UGLMU fisheries technicians.
Other Resources
Ebener, M. P. [ED.]. 1998. A lake trout rehabilitation guide for Lake Huron. Great Lakes Fishery Commission. 48 p.
Contributing Author(s)
- Stephen James & Chris Davis - Ontario Ministry of Natural Resources
- Ji He - Michigan Department of Natural Resources
- Jose Bonilla-Gomez & Scott Koproski - United States Fish and Wildlife Service