[Zbrafish] Re: Question on Swimming Behavior

Rachel via zbrafish%40net.bio.net (by pryor.rld from gmail.com)
Wed Sep 22 08:31:54 EST 2010


On Sep 21, 1:18 pm, Steven Waldron <waldr... from u.washington.edu> wrote:
> Hi Rachel,
>
> Sounds like a swim bladder issue.  Could be an infection or a defect.  
> Is it a transient behavior? Do they show this behavior after eating the
> tetramin?
>
> Seems like your pH is a bit on the high side.  Though perhaps unrelated
> to your issue, I would drop the pH down to around neutral or slightly
> below (i.e. 6.8).
>
> best regards,
> Steve Waldron
> University of Washington
>
>
>
> Rachel wrote:
> > Hi all,
>
> > I've been culturing D. rerio for the last 4 months in 120L glass
> > aquaria on flow-thru water exchange system.
>
> > Lately, I have noticed that some of my fish (mostly gravid females)
> > have been swimming with their body in an odd position, nose-down-
> > caudal-fin-up ( similar to a '/' position). In addition, the swim
> > pattern is not a fluid motion but more of a quick jolting forward
> > movement. I have noticed this behavior in adult fish only >90 dpf.
>
> > WQ: Temp 26-27 degrees, pH 7.96-8.05, D.O. 96% saturation
> > Feeding regime: 24hr artemia a.m. and p.m.; Tetratmin Flake Food at
> > noon.
> > Stocking density: <5/L
>
> > Any thoughts on what could cause this behavior and what it could mean
> > for my population?
>
> > I appreciate your time,
>
> > Rachel Pryor
> > Student Services Contractor, USEPA
> > pryor.rac... from epa.gov
> > 850-934-9279
>
> > _______________________________________________
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> > Zbraf... from net.bio.net
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>
> - Show quoted text -


Thanks for your input Steve.  I don't believe this is a transient
behavior.  I have begun researching D. rerio and swim bladder issues,
so far have come up with inconclusive information.  I'll keep looking.

Again, thanks for your reply.

-Rachel



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