The Dreaded DE
- Thread starter sodenoshirayuki
- Start date
Bderick67;2975686; said:
So for sure an aro with DE in both eyes couldn't survive in the wild, possibly one with DE in one eye could. I'm thinking it's at least a possibility that wild aros can get it but don't live.
CTU2fan;2977441; said:
It could also be that aros in the wild, only get slight cases of DE and are able to recover from it.
EKen;2871841; said:
[yt]<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/c6Gwcf_VLcw&hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src=http://www.youtube.com/v/c6Gwcf_VLcw&hl=en&fs=1 type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>[/yt]
I wonder if this actaully worked? I would think that after the line was removed the eyes would just fall back. Unless maybe this was done after the surgery to remove tissue from behind the eye.
If there was someone qualified to do surgery here locally I would probably do it for my large female silver, her left eye is really extreme
Asian Aro with DE posted here by A. IMPORTZ.
http://www.monsterfishkeepers.com/forums/showthread.php?t=232404
Just thought I would share this as some of you may not see this thread in it's original location.
I am intrigued by this subject and thank you for your thorough treatise. I am getting back into (silver) arowanas after 25 years of being out of it. I want to say, though it's been a while, I have no recollection of my silver arowanas in the 1980's having DE. Unfortunately, I haven't looked for any old photos to verify that memory. I can say, they never displayed severe DE because I would have been alarmed by that and remembered it to my own death bed. One of the charms of arowanas for me has always been their ability to move their eyes in all directions, so my eyes were always on their eyes. I kept 2 or 3 SA back then, all of which reached 24 inches. I am curious if there are any other oldtimers around here who remember way back then better than I do. Was DE a problem for others 25 years ago?
This brings me to the list of beliefs for causes of DE in the starting post and one in particular, a genetic cause. When I last kept SA, I think all or almost all were wild caught. If (is this true?) most today are captive bred, then a limited gene pool could enhance a particular genetic trait and make it widespread.
I have to disagree with one point made about a possible genetic origin:
6. Genetics would explain why silvers are very prone to DE while blacks are virtually immune to it even though they are both very similar. This would also prove why you cannot prevent or cure it.
A genetic origin does not necessarily mean an unpreventable or untreatable condition. I'll agree, in strictest terms it would mean uncurable, for a genetic origin, any successful treatment or modification to husbandry methods would likely need to be carried out for the life of the fish. A genetic trait may make an organism more suspectible to a condition but there may be countermeasures that can lessen the physical effect of that trait, even prevent its physical manifestation.
I have a new, now 12 inch long SA who does not yet display any DE. Now that I am aware of the condition, I will do some more research. I'd like to continue to see eye to eye with this little fella.
This brings me to the list of beliefs for causes of DE in the starting post and one in particular, a genetic cause. When I last kept SA, I think all or almost all were wild caught. If (is this true?) most today are captive bred, then a limited gene pool could enhance a particular genetic trait and make it widespread.
I have to disagree with one point made about a possible genetic origin:
6. Genetics would explain why silvers are very prone to DE while blacks are virtually immune to it even though they are both very similar. This would also prove why you cannot prevent or cure it.
A genetic origin does not necessarily mean an unpreventable or untreatable condition. I'll agree, in strictest terms it would mean uncurable, for a genetic origin, any successful treatment or modification to husbandry methods would likely need to be carried out for the life of the fish. A genetic trait may make an organism more suspectible to a condition but there may be countermeasures that can lessen the physical effect of that trait, even prevent its physical manifestation.
I have a new, now 12 inch long SA who does not yet display any DE. Now that I am aware of the condition, I will do some more research. I'd like to continue to see eye to eye with this little fella.
I kept a silver 18 years ago. I had it for well over a year, so it was very big(24") when I sold it. It was raised in a 55g with just a thin glass top, though it never jumped. Now I don't know if it had DE or not. Then again I didn't even know what DE was, nor if it did have it I wouldn't have really seen very many other aros to compare with.
By seeing your recent couple of posts your are a good example of what I am explaning. Looks to me as if you currently own a silver and you didn't even know it had DE or what it was until recently.
By seeing your recent couple of posts your are a good example of what I am explaning. Looks to me as if you currently own a silver and you didn't even know it had DE or what it was until recently.
"When you say DE, the first arowana that people think of is the silver arowana."
true since 90% of all adult silvers and some juvy silver's I've seen either have full-blown or slight DE, Asians and Jars, havents seen one with DE yet... Gene related abnormality in silvers??? i guess and an unavoidable deformity more often than not
true since 90% of all adult silvers and some juvy silver's I've seen either have full-blown or slight DE, Asians and Jars, havents seen one with DE yet... Gene related abnormality in silvers??? i guess and an unavoidable deformity more often than not
In my case, i got three large silvers (20"+ to 2'). Only one has not so severe DE in one eye. IF this one did not have it, i would have tended to put DE due to too bright tank? My tank is quite dark - never switch on the canopy light. Tanks are all bare bottom (so reflection on the bottom) with bottom dwellers (things to look at). I don't think my aros are jumpers (hope it stays that way).
