help with fish weight formula

B

B~C

New member
hey there, I'm grappling with a formula to calculate a fish's weight. Here's what I got, any ideas for improvement? I'm going to laminate a copy to post on the charter boat

Formula for determining the size of fish caught on a charter vessel while on vacation

RFW = [AFW X .138 X (DLFC/3.46) X (EMFC/1.27]/ 116.723

where-
RFW = Reported Fish Weight
AFW = Actual Fish Weight
DLFC = Distance from Location that Fish was Caught
EMFC = Elapsed Months since Fish was Caught


there are many formulas available to determine a fish weight but none of them factor in the effect of time and distance on a good fish story. Using the above formula, a 40 # halibut caught 8 months prior & 1200 miles away would weigh over a 100 pounds when it comes fishing story time at the pub. I think I need to somehow consider the ABC (adult beverages consumed) factor too but it is such a wildly variable number.

ideas?
 
B~C":2fkpced3 said:
hey there, I'm grappling with a formula to calculate a fish's weight. Here's what I got, any ideas for improvement? I'm going to laminate a copy to post on the charter boat

Formula for determining the size of fish caught on a charter vessel while on vacation

RFW = [AFW X .138 X (DLFC/3.46) X (EMFC/1.27]/ 116.723

where-
RFW = Reported Fish Weight
AFW = Actual Fish Weight
DLFC = Distance from Location that Fish was Caught
EMFC = Elapsed Months since Fish was Caught


there are many formulas available to determine a fish weight but none of them factor in the effect of time and distance on a good fish story. Using the above formula, a 40 # halibut caught 8 months prior & 1200 miles away would weigh over a 100 pounds when it comes fishing story time at the pub. I think I need to somehow consider the ABC (adult beverages consumed) factor too but it is such a wildly variable number.

ideas?
Click to expand...

I think there are a few other variables missing also. 1) Any fish caught in Oregon, seems to be 1.5 times heavier than a comparable fish caught in Washington. E.g. that 10 lb fish in WA is and "Orygun 15".
2) If knowledgeable witness were not present, add 25% to the weight.
3) If the fish was lost add 50% to the weight.
 
Oh ya, I like #2. I'm going to have to add in the KWP factor. Knowledgeable Witness Present would reduce the final poundage so perhaps dividing by a percentage of KWP would be in order.....thanks

#3 is a given

we could be on the cutting edge of math history here, pioneering a new formula
 
these combined metrics all seem to adhere to my experiences. the combined cost of tackle purchased and lost in the drink seems to play a role in the size of the fish lost at the boat as well.

For instance, when my buddy tossed an unclipped DR ball in Pt Defiance last year, the very next fish on and lost was most likely a potential record holder based upon the play in the rod and the culminating events of the day.
 
Depends on species. A tuna, salmon, halibut have differing formula. I wrote a iOS app a few years back that did salmon and another for billfish based on length and girth. I will go pull up the salmon, as I feel that is what you are after?
Screenshot_2010_01_18_11_27_42.png
 
tcr_pnw":3vr91iq7 said:
don't forget the camera always adds 10lbs.
Click to expand...
If there is photo evidence, then some quantification of the holder must be applied, i.e. "Yeah, that's my buddy holding the fish I caught. He's actually 6'8" and weighs about 375 lbs, so you can imagine how big that fish really is."
 
Chromer, that's a cool app, what I'm after is a few chuckles out of guests...there is a person that is working on an app that measures some dimension on a halibut face and determines the length and weight of the fish....that would be most awesome but I can't seem to get apps to work on my old flip phone.

Tcr- if you hold the fish waaay out you can add more than ten. That might be a topic for another formula.

NFF would add tonnage for sure but I think I'll run with what I have. I've added dividing the 116.723 number by (1.2 + NWP) X .782

I think the formula is pretty solid the only thing left is to get it beer reviewed and published


formula not applicable in Texas
 
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