Proper fish measurement - Manitoba Fishing Forum - The Premier Fishing Forum Of Manitoba
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Old 01-27-2016, 01:27 AM   #1 (permalink)
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Default Proper fish measurement

I am sure this has probably been covered before but my search came up empty. When measuring a walleye do you fan the tail or not? closing the tail adds about a 1/4 inch at least and when trying to catch slot size fish it can make a huge difference in how many keepers one can take. The fishing guide does not appear to make any reference to this. As fish swim naturally with their tail fanned I would think this is how they should be measured? Also my fishing buddies and I have noticed that when a fish freezes they grow enough to make a fish that was just under the magic line noticeably over!
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Old 01-27-2016, 08:30 AM   #2 (permalink)
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Quoted from the MB Anglers Guide:

Measuring a Fish
Total fish length is measured from the most anterior part of the head to the most posterior part of the tail laid flat (i.e. not pinched).

There's even a diagram on page 17 of the guide on how to make sure the tail is not pinched but left naturally fanned out.
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Old 01-27-2016, 06:39 PM   #3 (permalink)
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Thanks, some how missed that in the guide last night.
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Old 01-27-2016, 08:08 PM   #4 (permalink)
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As for the theory of expanding fish when they freeze, I'll put that to the test tomorrow. I'll carefully measure my first fish I keep fresh out of the hole (and oh yes, there will be fish...), let it freeze solid, and do a post-freeze measurement.
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Old 01-27-2016, 10:35 PM   #5 (permalink)
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I am sure you will notice a difference. I use a homemade bump board and the expansion is quite noticeable when they freeze, could partially be from their muscles relaxing when they expire. Make sure they freeze strait Lol.
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Old 01-27-2016, 11:42 PM   #6 (permalink)
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I have never noticed a fish grow after it freezes, then again I guess I have never measured one after its frozen
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Old 01-28-2016, 11:37 AM   #7 (permalink)
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Is it mouth open or closed though?
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Old 01-29-2016, 11:07 PM   #8 (permalink)
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Quote:
Originally Posted by Captaincanuck61 View Post
As for the theory of expanding fish when they freeze, I'll put that to the test tomorrow. I'll carefully measure my first fish I keep fresh out of the hole (and oh yes, there will be fish...), let it freeze solid, and do a post-freeze measurement.
So, one of the most significant scientific research experiments of the 21st century was conducted yesterday, about a 1/2 mile off-shore of Balsam. All our keeper fish were measured as soon as they were pulled out of the hole (see...., told you there would be fish!). Then thrown outside, left to freeze up throughout the day, and re-measured.

Our conclusion? No measurable differences in lengths. As a matter of fact, there may have been a very slight decrease in their size.
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Old 01-30-2016, 12:22 AM   #9 (permalink)
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When fish freeze they lose some weight aswhile as a little length if there left to freeze solid. A neighbor just down the block from me caught a 44.5" northern pike about 25-28 pounds not frozen. When it was frozen solid hard as a rock and it was around 43" and losted weight in around 21-22 pounds. The neighbor got it mounted and once it was completed and a tape put to it the length came back too 44.5"
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Old 01-30-2016, 03:15 PM   #10 (permalink)
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I can see the length shrinking.

But I can't see the weight changing. No way its possible.
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