Liveliner - 8/22/2006 2:31 PM
rsimms - 8/21/2006 1:00 PM
46-inches long should put it right around 50. The 59 lber I caught was 48 inches and I've had several fish in the low 40's that typically measure 42 to 44 inches (I measure to tip of the tail, not the fork). It gets real hard to estimate big catfish however because as they age, they really quit growing in length, they start growing in girth (kind of like me). Next time make a point to measure length AND girth. And then plug them into this formula: length x length x girth ÷ 1,200) If your fish had a 30-inch girth, the formula says it would have weighed 52.9 lbs. However these formula's are still gross approximations. I've never actually cross-referenced a formula fish to a real scale... I should do that. When you surf internet you'll find a wide variety of "weight calculators" and formulas for different species. Obviously the same formula you use for a pike wouldn't apply to bass or bluegill. But the formula above is the best I know of for catfish, but obviously you must know girth.
Very interesting forumla. I know another way to do the math that should hit within 4%. Another formula is Girth squared X Length /800 = weight(4% +/-)
If you guys try to do the math emoScratch with these formulas then weigh the fish, please share the results with us. I am curious about both these formulas.
Thanks so much RsimmsemoWorthy emoThumbsup