Topwater Caranx Ignobilis: Giant Trevally (GT) > Tackle & Techniques

Weighing fish

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Nicolas Lim:
I've always wondered about this. I find the estimates given by guides to not really reflect the true weight of the fish. Case in point, I was in a fish freezer in Oman and there was a GT that the guide estimated at 45 kg in there. Just out of curiosity, I put it on the commercial scales that they had there and it topped out at 28kg.

I think taking measurements of girth and length would probably be a true judge. However, for bragging rights in the pub - 45 kg is a lot more fish than 28kg. :-D

Simon Bomholt:
Why not use a sling like the ones used for carp, pike evt. There are some monster models used for catfish that easily holds a Big gt. Look at Star bait monster sling

Mark Harris:
Nicolas - I do agree that some guides over-call fish to the ridiculous extent that you mention with the Oman fish.

Specific length and girth measurements are much better than the guesses of a guide who may or may not experienced enough to make such calls, and at least give a fair idea of how big the fish really was.

For my own part, many I have fished with call me a miserable git for often under-calling fish, but I would rather be that way than over-estimating.  The only large GT I have ever not released was a jigged fish which sadly died despite a very long effort to revive it. That one was weighed back at the dock as I gave it to the deckies to sell at market.  I had actually under-estimated that fish by 4-5 kgs  :-\.

Simon - I too have a bit of experience using those massive European Carp/Wels Catfish slings and they could be a good option for GTs. Setting one up on a boat though would not be easy, nor would finding the space for it.  Logistically I prefer the bathroom scales I think, unless it is a large boat with enough space to leave a sling permanently set up.

Craig Maree:

--- Quote from: Nicolas Lim on March 28, 2012, 08:34:07 PM ---I've always wondered about this. I find the estimates given by guides to not really reflect the true weight of the fish. Case in point, I was in a fish freezer in Oman and there was a GT that the guide estimated at 45 kg in there. Just out of curiosity, I put it on the commercial scales that they had there and it topped out at 28kg.

I think taking measurements of girth and length would probably be a true judge. However, for bragging rights in the pub - 45 kg is a lot more fish than 28kg. :-D

--- End quote ---

Did you perhaps take the fork length measurement of the dead GT?

Doug Terry:
for the scales look here. http://www.mkscales.co.uk/products_120_27_MKS-NTA-Hanging-Scales.html
and place the GT in a carp weighsling.
hope this helps.

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