Which arowanas don't ever get drop eye?

[David R]

the best guess is when the aro jumps and hits there head the damage causes there eyes to get bruised and pop out downwards. Some members on here witnessed there aros get drop eye right after they jumped and hit there head. Also explains why aros in ponds or in the wild don't get drop eye.

Thats bs, because it doesnt explain why silvers get it for more commonly than other species. My black aro bashed itself into the top/ends of the tank countless times, but after 2+ years and at nearly 2' it was perfect.

My money is still on genetics. The aros that most commonly get drop eye are the most commonly captive bred. The silvers and asians we get now would have been captive bred for generations, with out natural selection playing a part in selecting the breeding population. The environment may also have an effect, ie being kept in a tank with bright lights above and nothing to look at, instead of loving in a flooded forest constantly scanning the branches for insects, but that wouldn't explain why some species have a much higher occurrance of DE.

What would be interesting to see is how many people with wild caught silvers get DE, and if wild silvers kept in open ponds with no bright lights overhead are less prone to it.

 

[Hao]

most common to get DE, IME:
1: silver
2: black
3: jar/ lei
4: asian
5: african (if they can get it at all)

actually its more like this:
1:silver
2:jar/lei/Asian
3:black
4:african

 

[Retuks]

Thats bs, because it doesnt explain why silvers get it for more commonly than other species. My black aro bashed itself into the top/ends of the tank countless times, but after 2+ years and at nearly 2' it was perfect.

My money is still on genetics. The aros that most commonly get drop eye are the most commonly captive bred. The silvers and asians we get now would have been captive bred for generations, with out natural selection playing a part in selecting the breeding population. The environment may also have an effect, ie being kept in a tank with bright lights above and nothing to look at, instead of loving in a flooded forest constantly scanning the branches for insects, but that wouldn't explain why some species have a much higher occurrance of DE.

What would be interesting to see is how many people with wild caught silvers get DE, and if wild silvers kept in open ponds with no bright lights overhead are less prone to it.

when i went to brazil for capoeira i used to do, we caught silver arowanas with DE

 

[Retuks]

LOL ALRIGHT VERDICT:

i might as well go with african arowana. they are cheaper than silvers where shop anyway. silvers = $30. africans = $18

 

[WHITECJ2OW]

Thats bs, because it doesnt explain why silvers get it for more commonly than other species. My black aro bashed itself into the top/ends of the tank countless times, but after 2+ years and at nearly 2' it was perfect.

read my other post

....my first guess is only that a guess there can be other ways they can get it......

It is not BS, if i recall correctly Berick's aro got DE right in front of his eyes right after it jumped and hit his head. That does not mean this is the only way aros get DE, just one way.

 

[David R]

when i went to brazil for capoeira i used to do, we caught silver arowanas with DE

Interesting, I would have thought that an aro with DE would be severly disadvantaged in habitat, and they would be very uncommon, although not unheard of if my theory about it being a genetic defect is correct. Do you have any pics? And can you remember what sort of percentage of aros you found had it?

It is not BS, if i recall correctly Berick's aro got DE right in front of his eyes right after it jumped and hit his head. That does not mean this is the only way aros get DE, just one way.

I'm not saying that a head injury cannot cause the eye to face downwards, but that isn't really the cause of "drop eye" as such, blacks and asians jump just as much as silvers and have a much lower occurance of DE. There are a few cases like the one you mention, but usually it develops over a period of time and not from any one event.

 

[Bderick67]

 

[Retuks]

Interesting, I would have thought that an aro with DE would be severly disadvantaged in habitat, and they would be very uncommon, although not unheard of if my theory about it being a genetic defect is correct. Do you have any pics? And can you remember what sort of percentage of aros you found had it?


I'm not saying that a head injury cannot cause the eye to face downwards, but that isn't really the cause of "drop eye" as such, blacks and asians jump just as much as silvers and have a much lower occurance of DE. There are a few cases like the one you mention, but usually it develops over a period of time and not from any one event.

maybe silvers have weaker eye support mechanisms (if that made sense) that keep their eyes from going down and it breaks easier on impact than blacks and asians.

the photos of the trip are long gone by now prolly as it was a Polaroid on our bullitein board. plenty of piranhas, pacus, and exodons and id say percentage wise 100% since we only caught 2. one was about 15" the other one looked 2 feet or so. but one thing i noticed is that exodons and payara had DE too. i hooked some pretty big exodons almost tilapia sized. maybe it has something to do with size.

 

[dmopar74]

maybe silvers have weaker eye support mechanisms (if that made sense) that keep their eyes from going down and it breaks easier on impact than blacks and asians.

the photos of the trip are long gone by now prolly as it was a Polaroid on our bullitein board. plenty of piranhas, pacus, and exodons and id say percentage wise 100% since we only caught 2. one was about 15" the other one looked 2 feet or so. but one thing i noticed is that exodons and payara had DE too. i hooked some pretty big exodons almost tilapia sized. maybe it has something to do with size.

alot of fish look down when pulled out of water, which looks like DE.

 

[Retuks]

alot of fish look down when pulled out of water, which looks like DE.

i suppose then, i will never know. but has any1 seen that japanese arowana keeper who sent a fishing line through the aro's skull and tied the eyes upright again?

looks really painful.