INTERSTING: Wrigh Your fish with a ruler

[grant]

http://www.fisheries.nsw.gov.au/recreational/general/weigh_your_fish_with_a_ruler

Check it out. I wonder how accurate it would be.

g./

[linchpin75]

Accuracy - poor to medium perhaps

Too many variables to be accurate enough

[Dekka]

Haven't caught enough to say one way or another :cry: ...............but......after this season I'll be a bloody expert :lol:

[seaeagle]

70cm bream weighs 8.4kgs.... :mrgreen:

[triman]

When I was on the farm we had a tape measure that when placed around the middle of a beast would give an approx live weight and a dressed weight. Many moons ago there was a formula available, I can't recall where, based on the length and girth of a fish, to give it's weight.

[grant]

If you measure me after 4-5 schooners, you can tell that I am pissed!

g./

[triman]

Found one
http://www.dnr.state.wi.us/org/water/fhp/fish/faq/trophy.htm

bass weight = (length x length x girth) / 1,200

pike weight = (length x length x length) / 3,500

sunfish weight = (length x length x length) / 1,200

trout weight = (length x girth x girth) / 800

walleye weight = (length x length x length) / 2,700

[reelmischief]

Grant we have tried the formulas on a few fish and they get pretty close...its not deadly accurate but gets you close enough to a good guess

[grant]

Wow thats pretty neat we need a card made up so you can print it an laminate it!

g./

[kingyfisher]

Grant it is on the "Brag Mat" sold by NSW Fisheries,turn it over after measuring and it has a very good picture of the common NSW species to use for ID and lenght vs weight scales next to the pics. They cost $10 ea. but if you buy in bulk they're cheaper.
I could post a pic if you tell me how