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Posts: 2060
Location: Appleton,WI | I plugged a few numbers in and was woundering if the weight and girth tool is accurate.
I caught a fish today and knew it was over 30 pounds but when i plugged it in its telling me its around 42-45pounds I even took 2-3" off my girth to be generous can this be right???
Edited by MuskieE 9/23/2007 6:21 PM
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Posts: 32955
Location: Rhinelander, Wisconsin | Accurate. |
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Posts: 149
| This website uses the standard formula (L x G x G) / 800 which is over dependent on girth and thus can overestimate the weight of larger fish over 50".
If you choose to use the standard formula on fish over 50" it's recommended that you subtract at least 1/2 inch from the girth to get a more accurate weight.
The Wilkinson formula {L x (G - 0.75) x (G - 0.75)} / 800 was developed directly from the standard formula to better estimate the weight of a released fish and is less dependent on the girth measurement.
The Crawford formula {(L x G) / 25} - 10 is equally based on length and girth and was developed from actual measurements of over 700 dead muskies submitted to the Cleithrum Project.
Muskies have a wide variety of shapes and no one formula is going to be more accurate than the others for every single fish. Also keep in mind that formulas are simply estimates and will never be anything more than that. You have to weigh the fish to know for sure.
I actually use an average of the result of all 5 formulas and my research has found it to be more accurate more often than any one of the formulas is, but even that isn't the most accurate result every single time.
Seems to me a fish that you are saying the standard formula estimates at 42 - 45 pounds should be something like a 52 or 53 x about 26 girth. If you add the "2 or 3 inches" of the girth you said you took off to get that result you caught something like a 52 x 29 or 53 x 28 both of which are legit 50 pounders using all 5 accepted formulas.
Sounds like you caught a VERY nice fish any way you slice it !!!!!!! |
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Posts: 2427
Location: Ft. Wayne Indiana | Maybe your girth measurements are off, or your length measurements.... |
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| i think all fish have different builds and no formula is ever going to be the one to use for all fish....hence why they sell scales..if you want to know so bad, buy one....
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Posts: 507
| The model you use is only as good as the assumptions that go into them. We will add calculators based upon the different formulas that esoxcpr mentioned as soon as we get some free time to implement them into the calculator page. Thanks for the info esoxcpr. |
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Posts: 3511
Location: Elk River, Minnesota | Is there a pic of this fish? I'd love to see a pic of your trophy. She sounds like a monster!!
Steve |
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Posts: 1185
Location: Wishin I Was Fishin' | Eric you need to take that ruler out of your boat that measures in cm.
Just kidding nice fish. |
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Posts: 395
Location: NW WI | I never used the formula to calculate the weight of my personal best ~48 x 24 (quick measurements)...I just went by my guide-friend's estimate of ~35 lbs. Turns out he was pretty close!....Close enough for me...I could care less about a pound or two...or three!!!!
(Big Fish Oct05 comp.jpg)
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 Big Fish Oct05 comp.jpg (29KB - 127 downloads)
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| Nice fish, definatly a 30 to 35 lb class fish... Here is where the calculation does not make sense to me... This fish weighs around 34- 35 pounds, which I do beleive for a 48 x 24 fish... Now do the calculation on a 54 x 24 and it comes out to be 38-39 pounds... I really have a hard time believing that a 54" x 24" only weighs 4 pounds more.. Some people say you need to subtract a half inch on girth for fish over 50"... I believe that a 54" x 24" fish is over the 40 lb mark and possibly closing in on 45 lbs and I really have a hard time with this calculation... |
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Posts: 2378
| bn - 9/24/2007 6:51 AM
i think all fish have different builds and no formula is ever going to be the one to use for all fish....hence why they sell scales..if you want to know so bad, buy one....
exactly.
who cares?
if you really care, get a scale |
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