New MN DNR catfish survey online

  • jstiras
    Posts: 88
    #1222281

    Just thought I would make everyone aware that there is a new online catfish survey up at http://www.dnr.state.mn.us/fishing/index.html and is designed for catfish anglers across the whole state of Minnesota. The survey is just 10 questions long, takes a couple minutes, and is completely anonymous.

    The old survey is still up too. Links to both the new survey and the old survey, which was looking for volunteers to keep catfish diaries, can be found at http://www.dnr.state.mn.us/fish/catfish/index.html The older survey was designed for catfish anglers in the Twin Cities Metro Area. If you haven’t taken that survey yet, I encourage you to. If your mailing address or email has changed since you took that survey, feel free to drop me an email at [email protected] to update it. Since the idea of anglers keeping diaries in a spreadsheet and sending them to me electronically didn’t work out too well, I have made up paper diaries this year and will be mailing them out soon. Hopefully that means increased participation as I only got a handful of diaries mailed or emailed to me the last two years. These paper diaries I put together are made with waterproof paper, so all you need to do is throw it in your tackle box with a pencil and remember to record the information when you catch a fish.

    There are lots more tagged catfish swimming around, way more than this time last year. We tagged over 600 catfish last year and had reports of four being caught by anglers.

    Joel

    Brian Klawitter
    Keymaster
    Minnesota/Wisconsin Mississippi River
    Posts: 59992
    #964405

    Thanks Joel!

    I’ll be checking them out later today.

    Any revelations that you care to share here?

    jstiras
    Posts: 88
    #964547

    This year and next year will hopefully tells us some more. We’ve recaptured 11 catfish the past two years, 4 of those came from angler reports. Distance between capture sites has been pretty short, a few hundred feet generally. The largest distance observed was almost 10,000 feet for a channel cat in Pool 2 and that fish had been tagged for 128 days. But we don’t have radio tags on them so it could go to Missouri and back and we wouldn’t know unless someone catches it and reports where it was caught.

    We did have a channel cat caught in the St Croix 360 days after it was tagged. Caught by an angler less than 1500 feet from where we tagged and released it.

    We don’t have enough catfish tagged and recaptured yet to make any estimates of population size.

    I guess the most interesting piece we’ve uncovered is some age and growth information. Age 3, 4, 5, and 8-year-old channel catfish grow faster (statistically significant) in the St Croix than they do in Pool 2. My current hypothesis on that is I think the catfish population in Pool 2 is much larger than the catfish population in the St Croix, so there may be a lot of competition between catfish for food and habitat causing them to grow slower. The habitat and water clarity probably favors catfish in Pool 2 over the St Croix, so they likely have a larger population in Pool 2. There could be some harvest related effects as well, but we don’t have any creel surveys to decipher that. Which is why I started the diary program. Creel surveys are expensive so I’m not holding my breath on that one in this current economic environment.

    If any other notable tidbits come to mind, I will be sure to post them.

    Joel

    Brian Klawitter
    Keymaster
    Minnesota/Wisconsin Mississippi River
    Posts: 59992
    #964550

    Thanks again Joel!

    It’s totally awesome the DNR is taking an interest in our whiskered fish…and having a fella like you, with a passion for them working on it.

    mplspug
    Palmetto, Florida
    Posts: 25026
    #964669

    You supply the nets and keep the COs away, I can deliver a creel survey.

    Just kidding.

    Thanks for your efforts Joel!

    cat dude
    Arlington, MN
    Posts: 1389
    #965120

    Yes, thanks for all the help for our whiskered friends.

    jstiras
    Posts: 88
    #965796

    Thanks for the support guys.

    Brian Klawitter
    Keymaster
    Minnesota/Wisconsin Mississippi River
    Posts: 59992
    #973275

    Speaking of support…I just have to say that the books that were sent out area…fantabulistic!

    I’m up to date (which was never the case with the electronic forms) and when the book is sitting right on my desk, I don’t forget about entering the info as I did many many times with the spread sheet.

    My first thought of course was to leave it in the boat, but I kept forgetting to do it. I think it works out better on my desk anyway.

    You’ll have one more complete diary this year for certain!

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