Four walleye bag limit proposal
Senator Carrie Ruud,
I have been researching the proposal to change the Minnesota statewide bag limit for walleye from 6 fish to 4. This led me to you as the author of that legislation and a support letter from Tom Neustrom.
In this letter I would like to address some of the statements and implications in Mr. Neustrom’s letter. At the same time, I hope to start discussion regarding walleye biology, and how well-intentioned actions can have unintended negative consequences. My qualifications include being an aquatic biologist by training and a Large Lake Specialist that managed one of Minnesota’s best walleye lakes for more than 30 years.
The first point Tom makes is an anecdotal account of contacts he has made and his perception that there is overwhelming support for the bag limit change. I am not contesting his perception; however, I am contesting the assumption that his contacts are unbiased or represent the majority of Minnesotan’s. The DNR supported an unbiased survey of anglers in 2018 (the most recent data available) and the question was asked if anglers wanted the walleye limit to stay at 6 or be changed to 4. The majority of anglers responding to that survey were in favor of keeping the limit at 6 fish.
Tom indicates that there is total support for the change in walleye bag limit in the State Walleye Committee (correct name Walleye Work Group). This is not true and members of the committee that do not agree have stated such on the Walleye Central web site.
Next Tom states that certain large walleye lakes have a 4-walleye bag limit (true) and those lakes have had “great success”. This is where I have to make some assumptions since he does not clearly state what area the success was in. If what he means by success is that anglers have higher catch rates than in the past (which appears to be the goal of the regulation change) that is not necessarily true and definitely not due to the 4 fish bag limit.
The lakes he cites have slot length limits that require immediate release of fish caught of certain sizes. Release of those fish makes them available to be caught and released again (recycling of fish) which does increase catch rates. Information from Mille Lacs Lake indicates that fish may be recycled many times which increased catch rates (the walleye were tagged and individual releases were recorded).
Another example is Lake Winnibigoshish where a protected slot limit was put in place. Walleye catch rates increased significantly while harvest rates stayed similar after implementation of the slot limit. The bag limit stayed at 6 fish on lake Winnibigoshish. The main point here is that increased catch rates are primarily due to length limits and not the lower bag limit. Creel survey data from Lake Winnibigoshish also indicates that few anglers have ever harvested more than 4 walleye in a trip. Creel surveys have been conducted periodically since 1938, and on the best fishing years about 5% of anglers harvest more than 4 fish in a trip. Most lakes don’t have the walleye population of Lake Winnibigoshish so the percent of anglers harvesting more than 4
fish would be much lower. If anglers don’t harvest more than 4 fish how can a 4 fish bag limit save fish and increase catch or harvest rates?
Then Tom makes the argument that increasing technology, number of anglers due to the pandemic, and an increase in wheeled fish houses will cause over harvest of walleye. These fears have been around for a long time. The introduction of depth finders, GPS systems, and most recently underwater cameras were met with similar fears. Through tremendous increases in fishing pressure and technological advances walleye populations have remained relatively stable through time.
Although the mechanism is not fully understood, walleye appear to be quite resilient to angling effort. The same cannot be said for northern pike and sunfish, and the DNR through application of the scientific method has begun to address those problems. If there was a problem with the walleye population the same methods would be used to rectify the problem.
Tom states that the DNR supports the bag limit change and that the limit change proposal is not driven by social opinions. I cannot comment on DNR support or motivations behind support if it exists, however, I find it hard to believe motivation behind the 4 fish bag limit proposal is not socially motivated. The Walleye Technical Committee has been left out of the bag limit discussion and the legislature has been the driving force behind it.
If the change is not socially based then why is the Walleye Technical Committee (the group responsible for evaluating and proposing solutions to walleye problems in Minnesota) not involved in the proposal?
Walleye biology is complex, and I hope this letter generates questions and discussion. I would like to make this letter available to all legislators that vote on this legislation. Please make this letter part of the public record.
Sincerely
Gerald Albert
Retired Lake Winnibigoshish Large Lake Specialist