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TUNA & Big Game TUNA - Offshore Fishing for Tuna and Other Big Game

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Old 03-24-2011, 04:18 PM   #1
niko
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bluefin growth rates

typically how big are these fish at 1, 2 , and 3 yrs old. how old are these 70" fish we were catching last year. are males and females different sizes?

my 1st wife didn't like me fishing so much
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Old 03-24-2011, 05:22 PM   #2
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Been told tuna grow on average 3/4 an inch per month

LETS GO BRANDON
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Old 03-24-2011, 05:22 PM   #3
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Below is a table I had saved on my computer. From what I understand, a 70" fish is most likely not sexually mature yet.


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Old 03-24-2011, 05:32 PM   #4
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FYI: 70" ~ 175 - 180cm

Given the diversity of the human species, there is no “normal” human genome sequence. We are all mutants.
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Old 03-25-2011, 08:39 AM   #5
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From what I recall, they start to reproduce at 80" (10 years old)

Most of the other tuna's (YFT, Longfin, BE) is closer to 27" (hence the 27" fork length on the size limit)

BFT is one of the few managed species we can harvest below sexual maturity

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Old 03-25-2011, 10:16 AM   #6
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I had no idea that only the fish that are that big reproduce, that is amazing!! No wonder it is so hard to keep the population up. Hopefully this class of fish that have been coming back to Stellwagen for the past few years will get to that magic 80" and start making babies!! Only a few more inches for some of them.

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Old 03-25-2011, 04:56 PM   #7
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so where are all the little ones - 10 to 40 pounds. do they stay out in the warmer waters. just wondering.

my 1st wife didn't like me fishing so much
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Old 03-25-2011, 05:52 PM   #8
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Quote:
Originally Posted by RIROCKHOUND View Post
From what I recall, they start to reproduce at 80" (10 years old)

Most of the other tuna's (YFT, Longfin, BE) is closer to 27" (hence the 27" fork length on the size limit)

BFT is one of the few managed species we can harvest below sexual maturity



It's believed 8 years not 10 at 8 years about 72 inches

LETS GO BRANDON
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Old 03-26-2011, 05:50 AM   #9
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I think it is still debated Ronnie. I had read 8 years/72" and 80+ inches before...
from:

http://www.nmfs.noaa.gov/fishwatch/s...uefin_tuna.htm
"Reaches reproductive maturity: Late – western Atlantic bluefin tuna first spawn at age 8 and are believed to take longer to reach maturity than bluefin tuna in the eastern Atlantic. Recent studies indicate most bluefin are sexually mature by about 12 years."

Other thing's I've read said as young a 5 years.

Last edited by RIROCKHOUND; 03-26-2011 at 06:53 AM..

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Old 03-26-2011, 09:55 AM   #10
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Studies now show that BF reproduce at a much younger age then we thought. We have much to learn about them still. Just a few years ago it was believed that western and eastern tuna did not mix.
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Old 03-26-2011, 10:42 AM   #11
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One controversial assertion, that may contribute to the confusion about when bluefin become sexually mature, is the claim by some that eastern (Mediterranean) tuna spawn at a younger age (@ 5 years) than western (Gulf of Mexico) tuna (@ 8 years).

I don't think anyone knows for sure.

Three-fourths of the Earth's surface is water, and one-fourth is land. It is quite clear that the good Lord intended us to spend triple the amount of time fishing as taking care of the lawn.
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Old 03-27-2011, 04:55 PM   #12
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Quote:
Originally Posted by niko View Post
so where are all the little ones - 10 to 40 pounds. do they stay out in the warmer waters. just wondering.
They show up off BI,RI,most years,and we saw some really small fish on Stellwagen two years back.
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Old 03-27-2011, 07:39 PM   #13
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They were out at wildcat this year we were sharking out in 600 feet and surrounded by bonito size fish all day.
Posted from my iPhone/Mobile device
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Old 03-28-2011, 10:45 AM   #14
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There's an upcoming lecture on this very topic-

April 7th, Dr. Walt Golet from GMRI will be giving a lecture titled "Decadal Changes in Condition, Growth, and Distribution of Atlantic Bluefin Tuna in the Gulf of Maine". This is at the Gloucester Maritime Heritage Center, 7pm.

Should be pretty interesting.
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