silver arowana

[Adrius]

But then why is it uncommon in other species of arowana, even if housed in the same tank?

my guess would be genetics, since silvers are reproduced in a very large scale over and over again...and most adult breeding fish today have spawned from captive bred, raised silvers, not wild ones
this doesnt happen nearly as often to blacks, whose offspring invariably spawn from wild caught fish and then are sold at LFS
i think silvers get weak in a few senses from this captive cycle of breeding

just a guess anyways

 

[johnnykage]

so why eye drops if u think in that case over breeding so some other problems should come to this fish (GOD FOR FORBIT) so please help me by giving some suggestion and precaution to me to prevent EYE DROPS OF SILVER AROWANA

 

[Gshock]

so why eye drops if u think in that case over breeding so some other problems should come to this fish (GOD FOR FORBIT) so please help me by giving some suggestion and precaution to me to prevent EYE DROPS OF SILVER AROWANA

Did you just miss the past 5 or 6 posts? You CANNOT prevent drop eye. If we could stop drop eye with things as simple as topwater tankmates and floating decorations, nobody would have a silver with drop eye...

 

[Chaitika]

my guess would be genetics, since silvers are reproduced in a very large scale over and over again...and most adult breeding fish today have spawned from captive bred, raised silvers, not wild ones
this doesnt happen nearly as often to blacks, whose offspring invariably spawn from wild caught fish and then are sold at LFS
i think silvers get weak in a few senses from this captive cycle of breeding

just a guess anyways

It's not just silvers that get it. I see more and more red asian aros with de, especially at a very young age.

 

[metalhed3]

if youre running a bare bootom tank i heard thtat is a cause of eye drop because they are constantly looking at their own reflection. idk if that is true or not but i have heard that as a cause

 

[Chaitika]

if youre running a bare bootom tank i heard thtat is a cause of eye drop because they are constantly looking at their own reflection. idk if that is true or not but i have heard that as a cause

I have an RTG who has been over barebottomed tanks for almost 4 years. Not even a hint of de.

 

[johnnykage]

k so tell me how many times should i feed my arowna specially pellets and others diet it around 5inches now and how to raise colour of it by which food

 

[ausarow]

i dont really go for the idea that drop eye in silvers is because the fish are sometimes farmed maybe over a couple of generations.
i would rather you accept that if you stick a silver in a tank and try heaps of things, you still have a high chance of getting drop eye.
can anyone guess at the ratio of farmed to wild caught silvers in the market? there is a lot of wild caught silvers around. that is the primary reason they are so cheap.
so we must think, is it really very likely to be because farm breeding has somehow more so selected for some kind of drop eye genes? if it did, man it happened quickly.

also, if i caught a wild silver and took it to a farm and bred it with another wild caught silver its young would be pretty much the same as from the wild cross. unless i just happened to choose a fish that is prone to drop eye once i rear it in my house.
and i think that is exactly the case, in that most of the wild ones too would be prone to it once moved into a tank.

now asians in the market are way more likely to be bred on farms AND for many generations.

to me asian farmers have been luckier with their stock species. maybe the red and gold is good luck afterall.

yet the asians are bred mostly in ponds and and there would be little occurance of drop eye to allow selecting it out and so attempts at selecting for non drop eye fish would not be to much advantage anyway- if it was trying to be weeded out. and still with very high survival across the board among juveniles to adults and to breeding on the asian farms there is no massive percentage getting it among the asians. its certainly less percentage than with silvers of which much more percentage is wild caught wild bred..
it still happens, i had a drop eye rtg and afterall we are making the fish live in and look at for a majority of the time, something that it has not evolved to suit.

the asians that have been bred beyond lets say f5s and a big number of offspring make it into the future gene pool.

now unless we can guess that silvers in the wild can get drop eye more so than asians in the wild and still survive to adults and breed while asians do not because the asians die out from having bung sight, then it is not something that has been naturally selected out of asians genetics more so compared to silvers. though some of that could be possible i think the answer lays at the behaviour of the eye and its set up.

the environment the asians are in has meant for a different evolution in terms of eye position and aim.
look at the silvers tail for a major indication. the silver is much more so designed for still hovering positions and tracking on the same line of sight upwards and then they go into a spring leap at insects, more so than asians are.
i would bet my left nut that the stomach contents of silvers in the wild would indicate this difference too.
the way they feed etc and probably means that the eyes of the silver are suited even more so than asians to surface and aerial feeding. then, its differing eye mechanics which is set in its genes is not to be confused with poor breeding selection of said genes. i think a lot of people realise its locked into the genes, or part and parcel of the silvers genes but that does not mean it was man bred into the genes or expressed more so due to man breeding.
your best bet at not getting drop eye would be to stick them in a long and wide pond with overhanging vegetation and insects etc. failing that you could cardboard or plastic all your tank walls and look at the fish from above and hope that drop eye on this fish isnt produced by an eye injury.
so i guess we would be better to look at it as part of the bargain if we want to look at them side on in a tank.

what about the fatty food idea? was this brought about because people made a connection with the food types in a wild setting? i doubt it.
ive been wrong before but muscles can lose their strength if they arent used. the muscles can be replaced by fat rather than muscle.
if your eye is designed to look up a lot and now there is no gain or triggers for that, yet your looking down and to the side more than ever, it is enough to explain it.
im sticking with it and running with it!

 

[johnnykage]

tell me shortly bro i didnt understand sorry pls

 

[Juxtaroberto]

if youre running a bare bootom tank i heard thtat is a cause of eye drop because they are constantly looking at their own reflection. idk if that is true or not but i have heard that as a cause

You can see the reflection from the outside of the tank, but if you were inside the tank, you'd just see the surface the tank was sitting on. No reflection when you're inside.

tell me shortly bro i didnt understand sorry pls

Err, basically, he speculated on the cause of drop eye based on the environment, behavior, and morphology of each arowana. Until someone in a lab runs a bunch of tests and experiments, though, we won't know what causes drop-eye. If you really don't like drop-eye, get a black arowana.

Feed your aro once or twice a day during it's first year growth spurt (basically, between the time they're born and the time they hit 24"). I used to feed Hikari floating carnivore sticks, now I'm on Carnisticks (which seem to be the same thing, except they're bigger). After that, feed every other day. Once they hit about 4', and their growing slows down to almost imperceptibility, you can feed every two or three days, even (since in an aquarium, they don't get much exercise, and you don't want them to become overweight). Supplement pellets with worms, roaches (I personally like Blaptica dubia due to the higher protein:chitin ratio), shrimp, and any white, least oily fish meat from the supermarket, and krill. Krill has a lot of carotene, which helps with color (I think all of Hikari's carnivore foods contain astaxanthin, which also help with color).