Updated 2024-11-22 14:34:04
Lake Superior -> 3.0 Lake Trout -> Siscowet Lake Trout Catch Rate
Reporting Interval
2017 - 2021
Area
Offshore Waters
Meeting Target?
Meets
Indicator Trend
No trend
Confidence?
High
3.1.3 Average mean CPUE of siscowet lake trout from the coordinated lake wide survey in each management unit above 10 fish/ km net night.
The coordinated lake wide gill net survey provides a standardized measure of siscowet (deepwater) lake trout relative abundance in each lake trout management unit in US waters. This graded-mesh survey is conducted at least every three years in each US lake trout management unit. Sampling is conducted across all available depth intervals in each unit and captures a wide distribution of siscowet sizes and ages. Some management units do not have adequate habitat to support target levels of siscowet (e.g. WI-1 & 2) The catch-per-unit-effort (CPUE) in each management unit has varied between reporting periods but was rarely below 10 fish/ km net night in the contemporary period. This was considered a reasonable benchmark because siscowet recruitment was stable and age compositions generally expanded during the contemporary period.
Figure 1. Average siscowet lake trout catch per effort by Management Unit, 2017-2021
Methodology
Annual catch per effort for siscowet lake trout captured across all depth bins during the survey were provided by each agency responsible for sampling in a management unit. The average catch per effort was calculated using all available annual estimates in the reporting period for each management unit.
Other Resources
Contributing Author(s)
- Lake Superior Technical Committee -