Clove oil is something that can also work in small amounts. In an emergency
you could blow lots of air through a straw into a small amount of water and
the elevated CO2 levels can knock out a fish temporarily. But MS-222 is
probably the best thing for most fish, most of the time.
--Bruce Stallsmith
Huntsville, AL, US of A
>From: "Scott Davis" <unclescott_at_prodigy.net>
>Reply-To: nanfa_at_aquaria.net
>To: <nanfa_at_aquaria.net>
>Subject: NANFA-- Sacrificing or immobilizing fish
>Date: Mon, 29 Jul 2002 11:03:15 -0500
>
>I'm way out of my league in asking about this, but Martin's observation in
>his darterfest account that
>
>*after speaking with these darter folks I see the necessity of
>killing/preserving fish to identify what they are. it's to hard to count
>rays and scales on moving fish!*
>
>is something I'm sure that resonates with a number of amateurs.
>
>While looking for something else in the introduction to the Medakafish
>Homepage
>http://biol1.bio.nagoya-u.ac.jp:8000/remarks.html
>I noticed that in a section on Anesthesia there were several anesthetics
>which could be used for sexing, observing or operating (!) on medaka.
>
>Tokio Yamamoto suggested that
>
>*For this fish, however, phenylurethane is the best. Phenylurethane of
>0.015
>percent may be used satisfactorily to immobilize the fish...*
>
>and advised against immobilizing any fish more than once a day.
>
>It may be that those anesthetics are prohibitively expensive, or
>unrealistic/unwise, to work with, for any of several other reasons.
>
>Is it feasible to do fish IDs with an anesthetic or is this just fuzzy
>minded fish hugging?
>
>Thanks and all the best!
>
>Scott
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