locked jaw ocellaris

Kathy55g

In Memoriam
In my batch that was most "successful" (about 100 survivors at 4 weeks) I have quite a few with deformed mouths! I have never seen this with previous hatches. Some of the fish have mouths that look like they are permanently open! Some have underbites.

What causes this, and how do I prevent it in the future?
 
I think it is related to HLLE. My stepdad had it in a "mono-fish", and it lived with it for nearly a year, but it died because the power went out when we were out of town. He ate just fine and everyhting. It is usually caused by a stray voltage in the water...


Brock
 
Can't be that. No electrical things in the water except for the heater, and that is in the sump. Since none of the other batches have it, and they are all on the same system, that can't be it.

Thanks anyway.

Any other ideas out there?
 
It could be a nutrition issue. While I was working at a fish hatchery we frequently saw juvenile seabass with jaw deformities. Some changes were made to the diet and most of them went away. I'm sure you are feeding a good diet but maybe there are some other things you could improve upon. Good luck.

Maybe this will be helpful...
http://www.feedware.com/aqua/magazine/v2i1/recentdev.pdf

Christine
 
My best surgestions from experience is water quality then nutrition then genetics.

I have come to a few conclusions regarding miss baring in ocellaris mostly in ones i tryed to kill as larvae, wilst ones given super conditions went great guns and have very low mis baring, but all from the same parents.

Christian
 
<a href=showthread.php?s=&postid=6986755#post6986755 target=_blank>Originally posted</a> by mano
It could be a nutrition issue. While I was working at a fish hatchery we frequently saw juvenile seabass with jaw deformities. Some changes were made to the diet and most of them went away. I'm sure you are feeding a good diet but maybe there are some other things you could improve upon. Good luck.

Maybe this will be helpful...
http://www.feedware.com/aqua/magazine/v2i1/recentdev.pdf

Christine

WOW, thanks, interesting article!
 
Interesting, but it doesn't really say what causes it. I am feeding Otohime which is supposed to be excellent nutrition.

there are a lot of them with jaw deformities, and none of my other hatches had any.....
 
Kathy,

Is this spawn from the same parents as your other ones that didn't have any deformities? Were any changes made to their diet? Anything else different as far as lighting etc.? Are the larvae eating or trying to eat now?

Here is an article that talks about vitamin definiciencies in some fish so maybe you could check into your food to see if it may be lacking in anything.

http://www.fao.org/docrep/field/003/AB470E/AB470E05.htm

This one talks about deformities also and briefly mentions jaw deformities.

http://www.fao.org/documents/show_cdr.asp?url_file=/docrep/005/x3980e/x3980e0d.htm

Good luck and I hope you figure it out!

Christine
 
<a href=showthread.php?s=&postid=6994776#post6994776 target=_blank>Originally posted</a> by mano
Kathy,

Is this spawn from the same parents as your other ones that didn't have any deformities?

K:Yes.

Were any changes made to their diet?

K:Yes, I only fed NHBS for 3 days, and I fed Otohime A when I started the shrimp. They have been on Otohime ever since, 5 weeks old now.

Anything else different as far as lighting etc.?

K:No

Are the larvae eating or trying to eat now?

K:They have always been good eaters. They are appropriately sized and well fed.

Here is an article that talks about vitamin definiciencies in some fish so maybe you could check into your food to see if it may be lacking in anything.

http://www.fao.org/docrep/field/003/AB470E/AB470E05.htm

This one talks about deformities also and briefly mentions jaw deformities.

http://www.fao.org/documents/show_cdr.asp?url_file=/docrep/005/x3980e/x3980e0d.htm

Good luck and I hope you figure it out!

Christine

Thanks very much, I will read these.
 
Yes, Ed,
I gave less NHBS than other hatches because they were eating the Otohime so well, I thought they would burst. I only gave NHBS for 3 days morning and evening, and I gave less than I have in previous hatches.
 
I told my doctor it hurts when I do this... he said don't do that :)

On the next run go back to more bbs & less otohime and see what happens ;) ??

What species anyway? Couldn't just be injuries from fighting could it? GSM's I have raised really tore each other up and the WSM's I tried flat out killed each other, only 2 survived (and are on their way to being a pair).
 
Thanks Mano for the FAO link.It is worth to be explored with the arrows.Valuable updated info to be found there,no matter it deals with the two common european aquacultured species.Be sure everybody to browse it!:cool:
 
<a href=showthread.php?s=&postid=6997752#post6997752 target=_blank>Originally posted</a> by David M
I told my doctor it hurts when I do this... he said don't do that :)

On the next run go back to more bbs & less otohime and see what happens ;) ??

What species anyway? Couldn't just be injuries from fighting could it? GSM's I have raised really tore each other up and the WSM's I tried flat out killed each other, only 2 survived (and are on their way to being a pair).

I have Ocellaris. They never fight or hurt each other. In fact they like to stick together.
 
<a href=showthread.php?s=&postid=6998818#post6998818 target=_blank>Originally posted</a> by Kathy55g
Where were the arrows?

Kathy,

The arrows are at the bottom and top of the pages for the second link. It has all kinds of other info from a hatchery manual I believe. I hadn't really looked through it until Luis mentioned it.
 
I did see those, and followed them until I had to get back to pretending to work at work. I look forward to going back later, after I've siphoned my juvie tank and changed the filter and packed a bag for Italy.... too much to do.
 
I pm'd Dman since he does not use NHBS to see if he has this problem. Here is the info copy/pasted with his kind permission. He replied to my pm before he read this post, and my replies to his reply are listed below:

D:
Hi Kathy,
Here's the thing, I've never used NHBS. I could never master it, it was too messy, and I HATED it, so I was grinding up CE and having terrible results with that instead.
So I can't say with any authority whether there was an increase/decrease in mouth deformities as a result.
Are the deformities consistent hatch to hatch?

K: No this is the first hatch from the same ocellaris parents that had ANY mouth deformities. I had 3 other hatches with no mouth deformities. This is also the first hatch where I introduced any Otohime (A at day 5) and they ate it very well.

D:
If it is the case it could be a result of lighting (as described below) or a genetic predisposition from one or both of the parents. i.e., one's a percula and one's an ocellaris.
Most of my gimps are a direct result of having too much light and them swimming face down on the bottom or crashing into the sides, and with my GSM's it is from aggression in small to medium sized survivals. (Maroon hatches, both white and gold with excellent survival, say 300-500 per hatch experiences far, far less deformities as a result of aggression)

K: My ocellaris do not fight! they act like they like each other. This hatch was unusually middle swimming compared to my previous hatches. They did not go to the sides until after metamorphosis. They were always swimming in the middle. I do not think it was the light or aggression.

D: I honestly canââ"šÂ¬Ã¢"žÂ¢t see food contributing to such a physical deformity like overbite. I could see a lack of certain nutrients contributing to slow growth, but usually dry foods are administered after Meta.

K: I started them on Otohime at day 5, so that was before meta. They still had rots enriched with live phytoplankton, so I can't see how they could have grown so well, and still been nutritionally deprived. They are 5 weeks old, and about 1/2 inch long, quite uniform, and most have all the white bands.

D: Most physical deformities would normally develop during the first few days, at which point theyââ"šÂ¬Ã¢"žÂ¢d be on rotifers. Except extreme cases of brutal aggression from siblings after Meta, I would lean more towards genetics, rather than nutrition.
Now, Iââ"šÂ¬Ã¢"žÂ¢m no where even close to being an expert on these things and I could be completely wrong and the cause could be an omega-3 DHA deficiency in the rotifers thatââ"šÂ¬Ã¢"žÂ¢s doing it, but if that was the case, I would probably never know it as Iââ"šÂ¬Ã¢"žÂ¢m not THAT smart.

K: You are smart enough for anything.

On the other hand, I did have some trouble with my phyto culture slowing down during their larval stage. I wonder if the phyto was missing something that the deficiency of which caused the deformity. That's a possibility.

I wonder if you would mind if I posted this in the forum so that other folks could weigh in?

Thanks for the reply to my questions. I really thought I knew what I was doing when I got 100 ocellaris past meta from the same hatch. I guess I still have more to learn....that's a good thing.

Cheers,
Kathy
:)
 
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