On a trip in 2006 Rich, Don, Danny, and myself tagged 6 fish and Rich the boat owner got this email:

Mr. Danny Whiting and Captain Richard Betts-



A 45 pound bluefin you tagged on October 14, 2006 off of Georges Bank was recaptured in Cape Cod Bay on August 23, 2009. At the time of recapture the fish was 65 inches, with a girth of 44 inches. Congratulations to both of you for tagging a fish which was recaptured. I have sent certificates of congratulations to you both and will send you t-shirts as well. Can you please provide me with you t-shirt size, so that I may send the correct size? Recapture data helps fisheries conservation and biological science. We appreciate your support and your involvement in the Tag A Tiny Program.



I have copied Ms. Becca Toppin of the Large Pelagics Research Lab at the University of New Hampshire. Becca works wit the Tag A Tiny Program and can provide you with additional information about the program and the ways in which it benefits the ocean.



Best Regards,



Elliott Stark

Science and Policy Specialist

The Billfish Foundation

Pretty cool I think.

Here is the tuna from '06.

That's cool!! And proof these fish live well beyond their release.

Lot's of intel in that photo .... PINK is the hot color :rotf2:

I don't remember the formula for calculating weight and was wondering how much the tuna grew I will try and find it and repost unless someone will post it first. That is very cool though.
Ed
Found it:
Girth x girth x length divided by 800= weight
44x44x65/800=157.3lbs.

I don't remember the formula for calculating weight and was wondering how much the tuna grew I will try and find it and repost unless someone will post it first. That is very cool though.
Ed
Found it:
Girth x girth x length divided by 800= weight
44x44x65/800=157.3lbs.

That is the general formula used for any fish but there are more rigorous scientific verified versions for the highly regulated tuna industry. This equation is specific for blue fin:

Length-Weight estimate Western Atlantic Blue fin (From the journal Fisheries Sciences):

W (lbs) = 0.00004044 * L (inches*2.54)exp2.837 *1.112 *2.2 (lb/Kg)

The 1.112 is conversion from eviscerated weight to whole weight

For example, 65" = 165.1 cm gives a W = 195 lbs

very cool!
Interesting that when the fish was small, you got it on Georges Bank and when it got a little larger it came inside the bay.

That is the general formula used for any fish but there are more rigorous scientific verified versions for the highly regulated tuna industry. This equation is specific for blue fin:

Length-Weight estimate Western Atlantic Blue fin (From the journal Fisheries Sciences):

W (lbs) = 0.00004044 * L (inches*2.54)exp2.837 *1.112 *2.2 (lb/Kg)

The 1.112 is conversion from eviscerated weight to whole weight

For example, 65" = 165.1 cm gives a W = 195 lbs

I can't quite understand how to read this formula but would like to know how it's done? Can it be put any other way? Does the * mean multiply?

Yes * is a multiply and the length in cm is raised to the 2.837 power. Inches*2.54 = cm

W (lbs) = 0.00009893 times L (cm)power 2.837

This formula is necessary due to the high proportion and dense muscle found in tuna versus other game fish.

very cool!
Interesting that when the fish was small, you got it on Georges Bank and when it got a little larger it came inside the bay.

For a fish that has a cruising speed of 30MPH, one of these things could be on Peaked Hill in the morning, and then in Gloucester a few hours later if they wanted to. Just like bass, they just go where the bait is.

Good for you,Matt.Not so good for the tuna,I guess.:)

I'm impressed that you were out at Georges Bank in a small boat!!!!

I can do amazing things Steve. You know that. But actually that fish came from the sword area not Georges.

The problem is..... if the fish WERE on Geroges Bank, he'd be out there in a 17ft center console.:uhuh: