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"Jay DeLong" <jdelong at nwifc_wa.gov>: NANFA-- re: J L Weigert- pike removal

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From: "Jay DeLong" <jdelong at nwifc_wa.gov>
To: nanfa at aquaria_net
Subject: NANFA-- re: J L Weigert- pike removal
Date: Wed, 22 Oct 1997 11:08:35 +0000
Message-ID: <199710221810.LAA16083 at chinook_nwifc.wa.gov>

J.L. Weigert said:

> Heres my question about all this:  What about the native fish there,
> ones that belonged?  The pike were obviously there and a danger, but
> there was something native they were preying on.  There had to have
been a
> better method to remove the pike, such as seining the waters with a
large holed
> siene, that hte pike wouldn't fit through?

Good question.  The ultimate goal was not to prevent predation on the 
lake's fish, but to prevent any pike from surviving and the species 
finding its way to other bodies of water.  This was done at the 
expense of the lake's existing fauna.

The suggested methods coming from concerned Californians and 
environmentalists all had flaws: 

seining--impossible to capture all the fish.  A large holed seine 
would have removed only the adults, so seining would have to be an 
endless effort.  Plus, there would have been no way to capture all 
the fish. I'll bet round-the-clock seining would heve removed less 
than 10% of the fish.  Look at their habitat preference and imagine 
the seining nightmare you'd have on your hands;

fishing--impossible to catch all the fish.  I think the state 
feels anglers have a tendency to move fish, too; 

rotenone--effects on non-target organisms and the potential health 
hazards we've already discussed.  Perhaps they should have tried the 
wettable rotenone powder first although it's more difficult to apply 
than the liquid;

electrocution--impossible to catch all the fish, but electrofishing 
would be better than seining or angling, and is farly easy to do in 
areas where seining is impossible.

Jay DeLong
Olympia, WA

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