Just a ballpark

Discussion in 'Gateway Catfishing Club' started by MO RIVER MAN, Aug 4, 2009.

  1. MO RIVER MAN

    MO RIVER MAN New Member

    Messages:
    298
    State:
    IOWA
    A blue 52 inches and 3 ft girth? Any kind of ballpark figure is appreciated.
     
  2. Mr Okie

    Mr Okie New Member

    Messages:
    940
    State:
    Okla/Texas

  3. katcatchingfool

    katcatchingfool New Member

    Messages:
    2,032
    State:
    illinois
    I caught one that was 53 inches long and had a 33inch girth didnt weigh the fish but some guys on here said he must of been around 74lbs. I dont know for sure. I don't care how much a fish weighs unless i am in a tourney. :wink: but I do know if you google fish calculation you can find a formula to find out the weight. Hope this helps.
     
  4. Cuz

    Cuz New Member

    Messages:
    7,241
    State:
    DeSoto, MO
    There is widely used formula for estimating a fishes weight Jake but I am
    getting ready to board a flight and don't have access to it. It's length x girth \800 or something like that. You can probably google it.

    It has a margin of error of + or - 10 %

    I ran the numbers on one of my blues which was 53 and 36 and it was in the ballpark. It was designed for saltwater game fish but appears to work somewhat with the larger catfish.
     
    Last edited: Aug 4, 2009
  5. Mickey

    Mickey New Member Supporting Member

    Messages:
    14,592
    State:
    Illinois
    The fish should weigh 40.17 lbs.
     
  6. Cuz

    Cuz New Member

    Messages:
    7,241
    State:
    DeSoto, MO
    Found it

    Girth squared x length \ 800

    in your case 36 x 36 x 52 /800 = 84 pounds.

    Sounds a little off to me. A 36 inch girth catfish though is a MASSIVE fish. The IGFA all tackle world record blue was 55 inches and had a 38 inch girth weighing in at 124 pounds.

    38 x 38 x 55/800 = Shows as 99 pounds so that's not very accurate.

    If you divide by 650 it seems to work out better.
     
  7. Mr Okie

    Mr Okie New Member

    Messages:
    940
    State:
    Okla/Texas
    Length x girth x girth divided By 800 or Length X length X Length Divided By 1600

    the link that I put up came from the MDC and was supposely ran on over 2,000 blues to set the scale.
     
  8. Cuz

    Cuz New Member

    Messages:
    7,241
    State:
    DeSoto, MO
    Just for fun, I ran this formula on my 4 biggest fish and it came out within 5 pounds of being accurate on every fish. I'm curious to see what others think

    Here's what I'm using

    girth x girth x length /650

    Curious to see your results. Ratman get to work lol
     
  9. Cuz

    Cuz New Member

    Messages:
    7,241
    State:
    DeSoto, MO
    Mr okies length x length x length /1600 works out darn close too.
     
  10. Mr Okie

    Mr Okie New Member

    Messages:
    940
    State:
    Okla/Texas
    Cuz Got this off the net looks like they have Pruitts fish at 44" girth...


    IGFA All Tackle World Record Blue Catfish
    Weight:
    124.0 lbs.
    Length:
    58.0 inches
    Girth:
    44 inches
    Angler:
    Tim Pruitt of Alton, IL
    Caught at:
    Mississippi River (Illinois)

     
  11. Cuz

    Cuz New Member

    Messages:
    7,241
    State:
    DeSoto, MO
    Dayumm my alzheimers is kicking in. You are correct mr okie. That makes pruitts fish work out then doesn't it?
     
  12. Mr Okie

    Mr Okie New Member

    Messages:
    940
    State:
    Okla/Texas
    I have Pruitts at 122 using Length X Length X Length / 1600 = 121.9 + the 2 lb bait that it ate = 124.0LB
     
  13. Mr Okie

    Mr Okie New Member

    Messages:
    940
    State:
    Okla/Texas

    Using the Lenght X Length X Length /1600 your fish show to be around 87lb....give or take..
     
  14. Cuz

    Cuz New Member

    Messages:
    7,241
    State:
    DeSoto, MO
    I ran the formula you found and it indeed works out much closer then mine do.

    Length x length x length / 1600

    Well just call it The Okie Formula for estimating catfish weights.

    Wow pretty amazing how it works out.
     
  15. Mr Okie

    Mr Okie New Member

    Messages:
    940
    State:
    Okla/Texas
    The amazing world of the internet...Thank you Mr Gore....:big_smile: :big_smile:

    I believe some one had posted this already in another thread...
     
  16. Cuz

    Cuz New Member

    Messages:
    7,241
    State:
    DeSoto, MO
    I ran your formula on my largest bluecat to date and it came within 1 pound lol
     
  17. Mr Okie

    Mr Okie New Member

    Messages:
    940
    State:
    Okla/Texas
    Are you flying the plane or just riding???????I hope you ain't posting and flying at the same time.....
     
  18. Cuz

    Cuz New Member

    Messages:
    7,241
    State:
    DeSoto, MO
    Standing in the jetway on an an American flight to New York. Fly to Portland tonight and staying in Vancouver. Long day for cuz
     
  19. GaryF

    GaryF New Member

    Messages:
    3,649
    State:
    O.P., KS
    Ok, I found it. The ultimate blue cat weight calculator. :wink:

    1. Measure length (L1) of fish from tip of tail to tip of nose.
    2. Measure girth at middle (G1) between tail and middle (G2) and between nose and middle (G3)
    3. Measure buoyancy (B1) (trapped air) of fish by measuring how far it floats out of the water.
    4. Now we apply a simple formula to determine the volume (V1) in cubic inches of the fish, V1=PI*((G1+G2+G3)/3)*L1
    5. Determine the weight in pounds for that much water (V1*.036126)
    6. Subtract a little bit for buoyancy (B1)
    7. Weigh fish on scale (S1) to arrive at accurate weight (W1)
     
    Last edited: Aug 4, 2009
  20. bluejay

    bluejay Well-Known Member

    Messages:
    8,494
    State:
    Napoleon, Mo.
    :smile2::smile2::smile2: