[Zbrafish] zebrafish disease
(by fatcatfish At optusnet.com.au)
Wed Dec 13 05:33:56 EST 2006
"christian lawrence" <clawrence At rics.bwh.harvard.edu> wrote in message
news:mailman.21.1162574718.14439.zbrafish At net.bio.net...
> The veterinarians that monitor the list will no doubt have more informed
> complete recommendations, especially with regards to diagnosis and
> medications, but in general, I would euthanize every one of the fish you
> from the market, every fish that came in contact with them, and completely
> sterilize everything they touched and start again.
> If this is not an option, I would:
> 1. Make sure your h2o quality is good and stable. Ammonia and nitrites
> to be zero, and nitrates low. pH should be stable, ideally around 7.
A few chunks of coral/shellgrit/marble will help here if your water is much
> 2. Kill everything that looks sick. Aggressive culling is very important.
Take the chance to chuck a chunk of gill under a microscope.
Don't waste these sick fish!! Learn whats going down!
Sacrificial fish can tell 1000 times more than a dead one.
> 3. Cut back on the feeding. Feed clean live food (i.e. Artemia from
> decapsulated cysts) once a day or once every other day.
spirulina flakes is another very concentrated food that works well (just
> 4. Lower the temperature. Slowly. 22-24 is fine if you acclimate them.
> 5. Raise the conductivity of your water. Again, not all at once. For
> example, if it is 500 uS, then bring it to 1000 over a week or so.
> this parameter is especially important if your maintenance conductivities
> are below 500uS.
> 6. Don't handle the fish. No breeding, no disturbance.
> When things stabilize, you can start to add more feeding, raise temp, and
> start to breed them again. Keeping at elevated conductivities is
> not a bad idea. But when you think things are stable, start to bring
> things back into operation slowly and carefully. And avoid introducing
> from an outside source directly into your facility in the future.
at very least quarantine them in a tank outside the system for 2 weeks
> Good luck,
just echo that good luck there
altho I am not a fan of full on steralisations
Chris has the plan!
I'd dose with a white spot med (prob just common parasite out of control in
the closed system)
> Christian Lawrence
> Brigham and Women's Hospital
> Karp Family Research Laboratories 06-004B
> One Blackfan Circle
> Boston, Massachusetts 02115
> Tel: 617.355.9041
> Fax: 617.355.9064
> -----Original Message-----
> From: zbrafish-bounces At oat.bio.indiana.edu
> [mailto:zbrafish-bounces At oat.bio.indiana.edu] On Behalf Of jenny
> Sent: Thursday, November 02, 2006 10:12 PM
> To: bionet-organisms-zebrafish At net.bio.net
> Subject: [Zbrafish] zebrafish disease
> Hi, everyone! I have a problem with breeding the zebrafish.I bought two
> hunderd adullt zebrafish from the nearby market in our city about two
> ago. within first 5-6 days,the fish seems healthy and spry, but now 10-20
> fish has got serious disease, the symptom describe as follows:white spots
> spreads in the fin and back; open their bloody mouth and can not shut
> they can not eat food freely and starve to die; decayed tails and gills;
> swim slowly and so on. I have pick up the ill fish and dissolve some drug
> prevent the desease,but effect is not so good.
> So I can not decide what kind of disease it is and have no right method
> to cure the fish, It has make great lost for our laboratory. Is there
> who has relative knowledge and some good ideas?
> Thanks for your replying!
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