Length to weight conversion table: Marlin, sharks, rays etc.
Submitted by cuthbad on Thu, 2011-03-10 22:36
Im pretty bad at estimating the weight of fish and since most fish I catch are either bait or released this table comes in pretty handy
http://www.sasaa.co.za/sasaaftp/allspeciescalculator1.xls
Just find the species, type in the length and it estimates the weight.
Thought it might be usefull for estimates with all the marlin being caught atm.
In my opinion it generally over estimates the weight by a small percentage. Keep in mind this is a South African table so species names differ in some cases.
Check it out and let us know how accurate you think it is, maybe some confirmed comparisons would be usefull.
Cheers,
Adam
cuthbad
Posts: 1266
Date Joined: 22/04/09
by the way Tailor = Elf /
by the way Tailor = Elf / Shad
Mulloway = Kob (apparently they are have found different species of Mulloway/Kob over there or something?)
Im sure there are other species with different names as well, if any RSA guys on here know what they are please let us know.
Cheers
Tony Halliday
Posts: 2500
Date Joined: 14/06/07
yip tailor is shad/elfCob or
yip tailor is shad/elf
Cob or Kob or Kobeljou, as the locals call it is in fact same species as Mulloway / NT Jewfish.
Tony Halliday: ~Meals on Reels ~
It takes a strong fish to swim against the current. Even a dead one can float with it
"It is always in season for old men to learn." Aeschylus (525-456 BC)
"In a mad world only the mad are sane." Akira Kurosawa (1910-1998)
petervb
Posts: 447
Date Joined: 18/12/09
not from rsa but i do know
not from rsa but i do know that
kingfish = trevally
petervb
Posts: 447
Date Joined: 18/12/09
as in what is known as
as in what is known as kingfish in south africa is known as trevally in aust
hlokk
Posts: 4290
Date Joined: 04/04/08
I was running through the
I was running through the marlin ones and found something odd. Theres some 'smith number' which is pretty similar for striped and black marlin and I figured that would be related to how 'meaty' they are per length (obviously a dhuie and mack will be diff weights at the same length). However, when I put 1m in it gives 5.4kg for black and 11.8kg for striped. Gets a lot more close when you get to 3m though, so I guess its more accurate at larger sizes only. Pity theres a few cells hidden and i'm not sure how to show them.
cuthbad
Posts: 1266
Date Joined: 22/04/09
yea I see what you mean.Im
yea I see what you mean.
Im not sure that the "smith number" relates to weight though. I think it might identify a species. For example the smooth hammerhead is noted twice, once for female and once for male, the "smith number" is the same for both, though the weights differ between the sexes. Same is true for a few other sharks n rays.
Maybe this smith number relates to family and species or something? Just a guess
Tony Halliday
Posts: 2500
Date Joined: 14/06/07
Dr.JLB Smith was a top marine
Dr.JLB Smith was a top marine scientist and the guy who made the Coelacanth famous.
His book Smiths Fish Guide : The Sea Fishes of Southern Africa is the RSA fish bible.
It’s a very good chance this number is a research constant from the JLB Smith Research Centre.
And can be found in his book.
Tony Halliday: ~Meals on Reels ~
It takes a strong fish to swim against the current. Even a dead one can float with it
"It is always in season for old men to learn." Aeschylus (525-456 BC)
"In a mad world only the mad are sane." Akira Kurosawa (1910-1998)
till
Posts: 9358
Date Joined: 21/02/08
Those sort of things are
Those sort of things are interesting but on Tuna, I've found them highly inaccurate. They're just so much fatter per length in say the US tuna fisheries, by around 20% too.