coldwater knives?
- Thread starter troppond
- Start date
That's what I thought but I was wondering if there was one, if there was I would think it'd live in those mountain streams in india like the goonch and mahseer
http://www.novelguide.com/a/discover/grze_04/grze_04_00267.html
'Most gymnotiform fishes tolerate temperatures between 68 and 92°F (20 and 35°C); a few species, however, have been found in colder waters. Apteronotus sp. and the glass knifefish (Eigenmannia lineata) occurred in considerable quantities in the Huallaga River (about 64.4°F or 18°C in the tropical mountain
rainforest near Tingo Maria, Peru). Under experimental conditions, Sternarchorhynchus sp. did not survive below 77°F (25°C), but tolerated temperatures up to 98.6°F (37°C). For Sternopygus sp., the range was 66.2–86°F (19–30°C).'
<<I was wondering if there was one, if there was I would think it'd live in those mountain streams in india like the goonch and mahseer>>
I imagine that finding a colder-water gymnotid is considerably more likely than finding a cold-water notopterid, simply because there are so many more of them, and those streams running down from the andes must get pretty chilly.
'Most gymnotiform fishes tolerate temperatures between 68 and 92°F (20 and 35°C); a few species, however, have been found in colder waters. Apteronotus sp. and the glass knifefish (Eigenmannia lineata) occurred in considerable quantities in the Huallaga River (about 64.4°F or 18°C in the tropical mountain
rainforest near Tingo Maria, Peru). Under experimental conditions, Sternarchorhynchus sp. did not survive below 77°F (25°C), but tolerated temperatures up to 98.6°F (37°C). For Sternopygus sp., the range was 66.2–86°F (19–30°C).'<<I was wondering if there was one, if there was I would think it'd live in those mountain streams in india like the goonch and mahseer>>
I imagine that finding a colder-water gymnotid is considerably more likely than finding a cold-water notopterid, simply because there are so many more of them, and those streams running down from the andes must get pretty chilly.
+1 for sourcing Grzimeck's Encyclopedia.
I would say if you wanted to acclimate a knifefish to cooler water, you do it very carefully and slowly. If you move it from a 78 degree tank at a LFS and add it to a 68 degree tank, that will not work out. I would say put it in a 10 gallon tank by itself heated to tropical temps and slowly lower the temps over the course of a couple of days then transfer it.
I would say if you wanted to acclimate a knifefish to cooler water, you do it very carefully and slowly. If you move it from a 78 degree tank at a LFS and add it to a 68 degree tank, that will not work out. I would say put it in a 10 gallon tank by itself heated to tropical temps and slowly lower the temps over the course of a couple of days then transfer it.
I just brought back a group of Eigenmannia lineata from Uruguay, where the water gets cold in the winter (probably upper 50s). I have a group of small ones in a 2'x2'x1' tank. Anyone have any experience with them?http://www.novelguide.com/a/discover/grze_04/grze_04_00267.html
'Most gymnotiform fishes tolerate temperatures between 68 and 92°F (20 and 35°C); a few species, however, have been found in colder waters. Apteronotus sp. and the glass knifefish (Eigenmannia lineata) occurred in considerable quantities in the Huallaga River (about 64.4°F or 18°C in the tropical mountain
<<I was wondering if there was one, if there was I would think it'd live in those mountain streams in india like the goonch and mahseer>>
I imagine that finding a colder-water gymnotid is considerably more likely than finding a cold-water notopterid, simply because there are so many more of them, and those streams running down from the andes must get pretty chilly.
I recall reading somewhere that the natural range of the Black Ghost Knife (Apteronotus albifrons) is quite large and extends down into or near Uruguay and Argentina. Probably not useful to us as aquarists unless we can source specimens from that southerly extreme of the range.
I agree that a gradual temperature acclimation is important when introducing fish into tanks that are considerably warmer or colder than those from which they are coming, but I think that some people may get a bit carried away with the idea. I bring home lots of fish from much-warmer "tropical" tanks or much-cooler outdoor stock tanks; I just make sure their indoor quarantine tank is roughly the same temp as their transport water when I put them in, and then let it warm or cool to ambient temperatures on its own. Depending upon the tank size and the temperature differential, this usually only takes a few or several hours, and I've never had any problems.
I agree that a gradual temperature acclimation is important when introducing fish into tanks that are considerably warmer or colder than those from which they are coming, but I think that some people may get a bit carried away with the idea. I bring home lots of fish from much-warmer "tropical" tanks or much-cooler outdoor stock tanks; I just make sure their indoor quarantine tank is roughly the same temp as their transport water when I put them in, and then let it warm or cool to ambient temperatures on its own. Depending upon the tank size and the temperature differential, this usually only takes a few or several hours, and I've never had any problems.