AGAIN: NANFA-- native fish of northern California

Jay DeLong (
Fri, 8 Mar 2002 13:46:07 -0800

Below is Dan Logan's response to Chris' question about salvage:

-----Original Message-----
From: Dan Logan
Sent: Friday, March 08, 2002 11:31 AM
Subject: Re: FW: NANFA-- native fish of northern California

> > Also, the big State water projects in the Delta region frequently take
> > in fish necessitating salvage.
> I've seen this mentioned before. What is "salvage?" Is it stranded fish
> when dams are drawn down?

Salvage has many applications in fisheries.  Sometimes fish need to be
salvaged or rescued following dewatering events (dam building or repair,
bridge building or repair, etc.) and sometimes following unforeseen events
such as a chemical spill or dam failure or levee breaching.  My response to
Andy Allison about collecting fish at the Delta pumping plants is a horse of
a different color. I have attached two photographs.  The first
[$CliftonCourtForebay.jpg ] shows
the entrance to a large water diversion.  In the background of the
photograph, the viewer sees the Sacramento River/San Joaquin River Delta.
In the foreground of the photograph, the viewer sees the mega diversion of
water heading toward southern California.  I don't have an image that
illustrates scale better, but you can take my word that the diversion and
the amount of water entrained in
the diversion are large.  At the headworks to the Clifton Court facility,
there are a series of giant louvered screens to reduce the number of fish
that entrained into the diversion canal.  At the screens, most of the fish
are shunted away from the diversion and returned to the Delta.  However the
louvered screens are "leaky" and so some fish do get entrained.  The second
[ ] shows a drum
screen from a smaller diversion; one gets the idea that these diversions and
screens are large.

As an aside, I have attached an interesting notice.  A co-worker is
recruiting volunteers to work on an invasive snail project in San Francisco
Bay. Please pass the notice on to the NANFA list.


I am looking for volunteers (approximately 24) to help with the survey of an
invasive marine intertidal snail (Littorina saxatilis, the rough periwinkle)
in the East Bay (Emeryville boat launch to San Leandro Bay).  The project is
with the Smithsonian and NOAA's Restoration Center.  No experience is
necessary (but always helpful) just a desire to learn and be part of the
ever growing invasive species problem.

The surveys will help determine the geographic range and density of
Littorina saxatilis.   Volunteers will learn how to conduct an intertidal
experiment, record data, and use a GPS.  I am looking for volunteers who can
commit to a couple of days a month during the last low tide cycle from April
to September.  I predict no more than eight hours a month and dates will be
chosen to coincide with the weekend if possible.  We hope to perform an
initial survey at the end of March so please direct any interested
volunteers to contact me at
707-575-6081 or

Thank you for you assistance.

Natalie Cosentino-Manning
Marine Ecologist/Restoration Specialist
National Marine Fisheries Service
Habitat Conservation Division/SWR
Damage Assessment and Restoration Program



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