Cariboo Region, Lake Trout Quota

Regulation Number: 
2023-05-03
Status: 
Proposed
Region: 
Region 5 - Cariboo
MU: 
5-1
5-2
5-13
5-15
5-16
Regulation Type: 
Quota
Species: 
Lake Trout
Closing Date: 
January 6, 2023 at midnight
Decision Statement: 

Pending

Current Regulations: 

Trout/Char daily quota = 3 but not more than 1 over 50 cm;

Lake trout release October 1-November 30

Horse Lake: Lake trout daily quota = 5 but no more than 1 over 50 cm – this was a short-term experimental regulation.

Proposed Regulations: 

Trout/Char daily quota = 2 but not more than 1 over 50 cm;

Lake trout release October 1-November 30

Horse Lake:  Remove from waterbody-specific regulation, default to regional regulations.

Rationale: 

Lake trout angling regulations were liberalized across the Cariboo Region in 2013 to allow more harvest after assessments showed improvements to many stocks. The regional daily possession limits were changed from one lake trout to three (only one of which may be longer than 50 cm). Six lake trout populations were assessed from 2017 to 2021 to evaluate the regulation change.Results from these recent assessments show all study lakes have low to moderate lake trout densities and the rate of decline is unsustainable in many lakes. The regulation change is proposed to stop or slow lake trout declines across the Cariboo Region and follow up assessments are scheduled to evaluate whether more restrictive angling regulations are required.

Additional Information: 

Six priority lake trout populations were assessed from 2017 to 2021 to evaluate regional regulation changes implemented in 2013. Summer Profundal Index Netting (SPIN) is a gillnetting survey that has been developed specifically to assess lake trout stocks and has been used on dozens of lakes across their range in North America. The number of lake trout per net is used as a measure of abundance and has been calibrated through mark-recapture studies. Results from SPIN on lakes in the Cariboo Region show all study lakes have low to moderate lake trout densities and where prior surveys have been conducted, populations have declined at an unsustainable rate. Using catch from SPIN nets as a measure of lake trout abundance was calibrated on Horse Lake in 2021 using paired mark-recapture and a SPIN survey. This work confirmed the lake trout catch rate in SPIN nets is related to the abundance of lake trout in the lake. SPIN surveys are for planned for nine lakes across the region from 2023-2027 to evaluate if populations are recovering as planned due to the proposed regulation change.