Tennessee Musky Fishing 2019 .
According to past references the muskellunge attains 8 feet (244 cm) in length; this, however, has never been confirmed and is based most likely on exaggerations. Some of these muskies may have been pre-spawn or immediate post-spawn and the very late season fish would/should have been building egg mass (although 2 kept fish had minimal egg development in late fall).
The result was this new formula and, a new World Record category founded for North American musky anglers use and can be found in the musky forum on the This newest formula, now known as the “Modified Crawford Formula” (MCF) (Length [in inches] X Girth [in inches] divided by 25 minus 8) (L X G/25-8), is used to “estimate” the weight of muskies over 50-pounds using length and girth measurements. It was developed by the author in 2017 from the base work of the Crawford Formula originally developed by Dr. Roy Crawford in 2002, with data on several hundred muskies, mostly in the small to mid-size range supplied by the author and Lax Taxidermy and published inThroughout the data base range of weights that were used to develop this new formula (27 muskies from 50 to 61.25-pounds), accuracy was maintained without greatly under or over stating actual fish weight, in this upper weight range of the species.
Both ways have been found to be “wanting” for use on muskies, both understating and overstating weight, sometimes in unacceptable amounts. So, I am guessing that these formulae fall apart for cases that are outside of the data that they used to develop them.”The total number of muskies now in this new data base were captured by anglers from early season (April-W.Va) throughout the summer to very late season (November and December) from all parts of the North American muskellunge range, including Ontario 10 (includes 4 shared border water fish with NY), Quebec 6, New York 4 (all shared border water fish with Ontario), Wisconsin 5 (including 1 shared border water fish), Minnesota 3, Michigan 2 (including 1 shared border water fish), and Iowa and West Virginia with one each. The maximum % deviation from actual scale weight was +4.9% and -4.6%. While it appears that the newest fisheries formula may be the most consistent in fish up to 30 pounds over all, both were all over the board when applied to just muskies over 50-pounds and were nowhere close to the accuracy of this new Modified Crawford Formula. The averages for the kept category were minus .94-pounds to plus 1.13-pounds. This gives a fair representative sample geographically and season wide.
Muskie Weight Calculation Equation. Tennessee Muskie Fishing.
Because the build of a Musky can vary greatly, a fish's length may not tell us that much about the Musky's true size.
Weight(lbs) = (girth"-0.75) X (girth"-0.75) X (length" / 800)Weight(kg) = 0.0000418 x ((length-cm X girth-cm)^1.441) Muskie have a shape factor of 1300. The International Game Fish Association (IGFA) still uses a derivative of this formula, albeit now using “fork length” rather than total tail length (FL X G X G/800), suggesting their agreement that the original formula was inaccurate.
The first choice is the standard weight calculation formula passed down to us from the ancients. Overstating the girth measurement with any formula will adversely affect the result of the “estimated” fish weight, but this new formula will not be nearly as affected as will the “Standard Formula”, (L X G X G/800) that compounds the errant result with the double use of the inaccurate girth measurement.As for my Modified Crawford Formula limited data base, I now have 27 samples that I have confidence in; 8 weighed released muskies over 50-pounds to 58.85-pounds that had total length and girth measured and weight taken on a certified scale, and 19 from 50-pounds to 61.25-pounds that were kept, measured and weight certified.
I recently had the newest/best and second-best fisheries scientist efforts converted to a form usable to me by Dr. Roy Crawford in order to apply them to the fish in this new formulas data base. The formula to calculate the weight for a Muskie that is 40 inches long and has a girth of 22 inches is as follows. This gives a quite varied, albeit limited, data base for this formula’s validity.Many thanks to Dr. Roy Crawford and Kevin Richards, “Lunge Log” editor for Muskie magazine for their help and contributions.