IUBio

Drugging worms

Geoff Read g.read at niwa.cri.nz
Thu Nov 2 21:57:04 EST 2000


Hello folks,

Are there any of the more sophisticated anaesthetics that anyone has 
found particularly good with annelids?  Not too long ago on another list the 
drug novocaine  was mentioned as good for many invertebrates if the 'right 
concentration' was used, which sounds a bit trial and error. Then there's 
MS222 and benzocaine. Has anyone any enthusiasm for them? Are they 
worth the expense? I'm looking to immobilise in a natural position for 
photography without flash, so don't want powders drifting in the water, and 
prefer a fast-acting substance. Magnesium chloride soln is the standard 
cheap & easy immobilising agent against which one would measure the 
others. (I don't think it stops cilia beating as readily as it stops muscle 
action, or does it?)       

I hope there's some expertise out there.

yrs curiously,

--
  Geoff Read <g.read at niwa.cri.nz>


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