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Subject: Re: Electroshock procedures
From: Curtis Knudsen <[log in to unmask]>
Reply-To:Academic forum on fisheries ecology and related topics <[log in to unmask]>
Date:Wed, 4 Dec 1996 09:48:28 -0800
Content-Type:TEXT/PLAIN
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TEXT/PLAIN (32 lines)


On Wed, 4 Dec 1996, Glenn Parsons wrote:

> Fish Folk,
>
> I have a question that is related to the discussion of electrofishsing. We
> use electroshocked crappie (Pomoxis annularis and P. nigromaculatus) for
> strip spawning
> in my lab. Is anyone aware of any effects of electroshock on egg viability,
> that is, could our problems with successfully strip spawning crappie be due
> to the fact that the female was electroshocked?
>
> Glenn Parsons
> University of Mississippi
> [log in to unmask]
>
>
>
Roach (1996) found that eggs from adults electroshocked experienced
higher mortality rates that those from unshocked adults in grayling,
chinook salmon and least cisco.  This effect was highest in chinook where
mean egg mortality of controls was about 1% and about 20% for
electroshocked fish.

Roach, S.M. 1996.  Influence of electrofishing on the survival of Artic
Grayling, chinook salmon, least cisco and humpback whitefish eggs.
Alaska Dept. Fish and Game.  Fishery Manuscript No. 96-1.  26pp.

---------------------------------------------------------------
Curt Knudsen
Washington Department of Fish and Wildlife
[log in to unmask]
---------------------------------------------------------------

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