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Subject: Re: Killing fish larvae
From: Nick Tolimieri <[log in to unmask]>
Reply-To:Scientific forum on fish and fisheries <[log in to unmask]>
Date:Tue, 7 Mar 2000 18:16:03 GMT+1200
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> Dear All,
>
> We have been sampling fish larvae for about five years and we have now come to
> the attention of Animal Ethics bureaucrats who are concerned about how we are
> killing our fish larvae.  We cannot use formalin in our research centre for
> health reasons and, since we need to look at otoliths of some of the larvae, we
> usually throw larvae <10 mm in lenghth straight into 95% ethanol.  My experience
> is that the larvae die within a second or so and surely this must be as'humane'
> as any method.  Juveniles and adults are anaesthetised first before being put
> into alcohol.  The bureaucrats have queried the use of ethanol and put me under
> pressure to justify this method.  Can anyone out there point me to 'official'
> guidelines for the 'humane' killing of fish larvae?
>
> Yours in hope and frustration, Paul.
>
> Dr Paul Humphries

I have no reference for you but I support your dropping fish larvae
into alcohol as a 'humane' method of killing them.

I've killed a lot of fish larvae.  I usually drop them in ethanol.  One
second and that's it.  They're dead.  It seems like a perfectly good
and 'humane' way to do it to me.

A method suggested to me once was to put them in the freezer
and let them cool down.  Seems more like torture to me than a
humane method.


Nick Tolimieri
University of Auckland
Leigh Marine Laboratory
P.O. Box 349
Warkworth
New Zealand

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Ph: 64 9 422 6111
Fax: 64 9 422 6113

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