system water conductivity

Posted 69 days ago, on Oct 29 2008
Joy Murphy

Does anyone know of any research on the effects of different conductivity levels on zebrafish performance?

I've looked at growth rates of larvae up to 14dpf and I found that the saltier, the better (I tested 1000, 2000 and 4000 microSeimens).  This seems to be because the rotifers we feed the fish survive longer.  However, it seems like most facilities operate in the range 500-1000.  Is there a long-term deleterious effect from higher salinity?

I am currently in charge of merging two facilities, one running at 500 uS and one at 3,000.  Based on the larval growth rates I observed, I am inclined to go high but I have only that one two-week test to go on.  We will be conducting small-molecule screens, in case that might influence any advice anyone might have.  

Thanks in advance for any insight!

 Joy