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joejelly

Pannies

9 posts in this topic

Does anyone know where I might find info. for finding the weight of a fish based on the length. I've caught a few sunnies that were in the 10 to 11 inch range and was curious how much a fish of that length might weigh.

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bass weight = (length x length x girth) / 1,200

pike weight = (length x length x length) / 3,500

sunfish weight = (length x length x length) / 1,200

trout weight = (length x girth x girth) / 800

walleye weight = (length x length x length) / 2,700

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HOW BOUT PERCHIES, I HAVE ONE THAT GOES 14 3/4 LONG!!!

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How accurate do you believe those calculations are? I would say the walleye is believable to an extent. I have a few that prove it true within a couple ounces, but others that make it completely false. For example I have a 29.5” walleye that weighed 10lbs 11oz according to a DNR certified scale. Yes it looked like it ate a football. According to the calculations you presented it would have said that that walleye was 9.5 lbs. That is a huge discrepancy. And the difference between a trophy and not a trophy in my book. I am just wondering because I have a 33.5” walleye that I don’t have a weight on and this says it would be 13.9lbs, which I would agree with because it was a little bit skinnier, but who knows for sure.

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Of course they are not exact or accurate for every fish just like every human 6' tall doesn't weigh the same. The only way to be exact is to weigh a fish on a quality scale. These formulas are for an estimate and as close as as you are going to get unless you weigh them!

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That's why I like to get a weight on a fish especially if it's a trophy. Personally, I would mount a sunfish if it was one pound four ounces or bigger and caught through the ice. It would probably have to be bigger if caught on the open water. There's a good chance I won't ever mount a sunfish.

I've measured nine inchers that were around 3/4 pound. Ten inchers are really big, but it's hard to guess the weight.

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,,,, and I would never use these formulas on a trophy fish as I would want to know exactly how much my "trophy" weighed.

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All I was looking for was an estimated guess. Thanks for the replies. With those calculations a 10.5 sunnie would be about .97 lbs. The one i caught I figured it was about 1 to 1.25 lbs. Not too far off. Once again thanks.

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I would agree about with you ditchpickle, but unfortunately I was in Northern Manitoba and my scale did not work due to some rust I was not aware of. I am only a catch and release guy now (other than a few eaters) and don’t ever keep these trophies unless they were possible state records. I usually take measurements, weight and pictures, however I was not able to get the weight. I had four witnesses, including my father, which really was the only important thing to me. It is the only fish I ever wonder about, but that’s what keeps me going back because she is still swimming around.

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