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Subject: Re: Anaesthetic for intertidal fish
From: Richard Bradshaw <[log in to unmask]>
Reply-To:Scientific forum on fish and fisheries <[log in to unmask]>
Date:Fri, 5 Mar 2010 10:39:09 -0600
Content-Type:text/plain
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Use a proper anesthetic.  Some of this stuff is the same as choking the fish.  You may as well put the fish on the lab bench until they stop moving!

Richard Bradshaw
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-----Original Message-----
From: Scientific forum on fish and fisheries [mailto:[log in to unmask]] On Behalf Of Joan
Sent: Thursday, March 04, 2010 7:07 PM
To: [log in to unmask]
Subject: Re: Anaesthetic for intertidal fish

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Magnus,  Here is another one that apparently went out with the dinosaurs,
but it worked for me 40 or so years ago.  Of course that was before there
were so many regulations, but I do not see why it would not be permitted.  I
learned of it from an article by Fish (1942).  That the authors name was
Fish was such a coincidence that I still remember his name even though I do
not remember where it was published.

I wanted to tag small estuarine migrants (5 cm or so) and could not afford
to buy anaesthetics.  So I read where you could anaesthetize fish by adding
sodium bicarbonate to the water they were contained in and then add vinegar.
The reaction released carbon dioxide which anaesthetized the fish.  After I
had tagged the fish I placed them in fresh water to be sure they revived
before they were released. As far as I know they survived: at least I
recovered some of them later from the wild. 

If you are interested in the original paper by Fish, and can not find it,
let me know.  If may still have the citation somewhere.

William H. Herke, Ph.D.
LSU School of Renewable Natural Resources

-----Original Message-----
From: Scientific forum on fish and fisheries
[mailto:[log in to unmask]] On Behalf Of Magnus Johnson
Sent: Thursday, March 04, 2010 1:22 PM
To: [log in to unmask]
Subject: Anaesthetic for intertidal fish

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Hi All,

We are doing a project on intertidal fish and want to knock them out so
that Chris can tag and measure them with minimal stress to the fish.
I've used clove oil in the past (cheap and easy to get hold of) but have
recently been told by a home office inspector that this went out with
the dinosaurs!

I've also been told that in the UK it is ok to use clove oil or
2-phexyethanol to kill fish but not to anaesthetise and bring round and
that we should  use MS222 (Tricaine methanesulfonate) instead.
 
Can anyone offer some advice/suggestions?

Cheers, Magnus
_____________________________________________________________

Dr Magnus L. Johnson
Centre for Environmental and Marine Sciences
University of Hull

http://www.hull.ac.uk/cems

 

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