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To: Richard
To: Pyle <deepreef@bi*.bi*.ha*.or*>
Subject: Re: bent fish
From: John HC <jhc@wo*.st*.co*>
Cc: Roger
Cc: Carlson <roger@ch*.sp*.tr*.co*>
Cc: techdiver@opal.com
Cc: John
Cc: HC <jhc@wo*.st*.co*>
Date: Fri, 13 May 1994 20:33:13 -0400 (EDT)

FWIW, I agree with Richard on this one. (His point, in a nutshell, was 
that something other than DCS is affecting the fish migrating upstream 
in the Northwest.)

It's been pretty well established that water supersaturated with DO is 
incompatible with healthy salmonids. It's also been pretty well 
established that many (possibly most) of the fishways built in the 
Pacific Northwest were built in such a way that the fish expire not 
because they can't make their way upstream against the current, but 
because there are too many bubbles in the water (i.e., not enough water 
to allow them to respire O2 through the gills).

I could speculate about why bubble formations in the skin might be 
symptomatic of an asphyxiating migratory fish, but suffice it to say that 
too much air and too little water makes for a sick fish.

Questions about stream turbulence and aquatic ecosystems are welcomed at 
this address: jhc@wo*.st*.co*. I *don't* think they will be long 
tolerated on the techdiver@opal.com address.

John H-C

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