Dorado Grow out Thread.
- Thread starter LiamIrons
- Start date
Still thinking one's a Brassy?? Hope it ends up being one, but I'm having a hard time picking it out. The pics above, are they Brassy in the first 2 then Frankies in the rest?
Yeah. I am quite convinced it is a brassy. The head is huge compared to the rest of the dorados and also seems to fit the profile on robs dorado thread.
The best way to know whether it's S. brasiliensis vs. S. franciscanus is where it's from. S. franciscanus is endemic to the São Francisco river basin in Brazil. S. brasiliensis has a wider range.
The morphological differences are minute and involve (overlapping) scale counts between the two "species": S. franciscanus differs from S. brasiliensis in having 68-82 (modally 77) lateral line scales (vs. 79-102, modally 96), 11-14 (modally 12) horizontal scales between dorsal-fin origin and lateral line (vs. 14-18, modally 16), and 6-8(modally 6) horizontal scales between lateral line and pelvic-fin insertion (vs. 6-9, modally 8)
Having caught (via seine, dip net and hook and line) bunches of what Felipe identified as S. brasiliensis all over Uruguay (from small ponds to the Rio Uruguay), they can be quite variable in coloration, head shape and size. Having landed a big one in the Rio Uruguay, I can't imagine comfortably housing such a large and powerful swimmer one in an aquarium short of several thousand gallons. That's one of the reasons why I've never brought and back.
Uruguay has seasonal sub-tropical weather (temps in the 40s and 50s in the winter). Do you give them a cool down in the winter months?
Matt
The morphological differences are minute and involve (overlapping) scale counts between the two "species": S. franciscanus differs from S. brasiliensis in having 68-82 (modally 77) lateral line scales (vs. 79-102, modally 96), 11-14 (modally 12) horizontal scales between dorsal-fin origin and lateral line (vs. 14-18, modally 16), and 6-8(modally 6) horizontal scales between lateral line and pelvic-fin insertion (vs. 6-9, modally 8)
Having caught (via seine, dip net and hook and line) bunches of what Felipe identified as S. brasiliensis all over Uruguay (from small ponds to the Rio Uruguay), they can be quite variable in coloration, head shape and size. Having landed a big one in the Rio Uruguay, I can't imagine comfortably housing such a large and powerful swimmer one in an aquarium short of several thousand gallons. That's one of the reasons why I've never brought and back.
Uruguay has seasonal sub-tropical weather (temps in the 40s and 50s in the winter). Do you give them a cool down in the winter months?
Matt
Yeah! Thats where my three large dorados were all caught from Urugauy! And yeah I cool down the tank to sub tropical temps during winter. And about the tank.. At the moment my largest is 1600 gal but i've got plans to build a 10,000 gal for them in a few years.
Odd...... Doesn't the sticky say they hardly ever hit 2' in home aquariums?
I remember Mike (H20) had one that he's had for like 10 years. Don't think it was over 30".
So with these sizes mentioned why the need for several thousand gallon tanks?
I remember Mike (H20) had one that he's had for like 10 years. Don't think it was over 30".
So with these sizes mentioned why the need for several thousand gallon tanks?
Holy cr@p that aquarium is awesome... I want my next aquarium to look like that lol.
