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Subject: Re: Impacts of divers (noise thereof and in general)
From: Steve Kolian <[log in to unmask]>
Reply-To:Scientific forum on fish and fisheries <[log in to unmask]>
Date:Wed, 11 Mar 2009 13:18:49 -0500

text/plain (156 lines)

Bob, I would resend question below with a new subject title. 

Best Regards, Steve Kolian 225-910-0304 cell

> Date: Wed, 11 Mar 2009 09:18:26 -0800
> From: [log in to unmask]
> Subject: Re: Impacts of divers (noise thereof and in general)
> To: [log in to unmask]
> I have a question for the group sort of along these lines.
> I run the freshwater fisheries resource permit program for the Alaska
> Department of Fish and Game. With high fuel prices still vivid in the
> minds of many, a number of remote villages in Alaska, located on large
> rivers, are looking into the possibility of installing small, run of the
> river hydro-electric generators thereby reducing remote village fuel
> costs. Studies to better understand possible impacts these units might
> have on fisheries resources, especially salmon and whitefish, are now
> being developed. There is concern that these units could kill fish in
> their turbines and/or drive fish away from feeding areas or traditional
> migration routes with the vibrations.
> Are there any papers out there that investigated these issues in other
> areas?
> Thanks in advance for your help. Wishing you all the best,
> Bob
> Bob Piorkowski, Ph.D.
> Alaska Department of Fish and Game-SF
> Box 115526, Juneau, Alaska 99811-5526
> Work (907)465-6109 Fax (907)465-2772
> [log in to unmask]
> -----Original Message-----
> From: Scientific forum on fish and fisheries
> [mailto:[log in to unmask]] On Behalf Of Adam Payne
> Sent: Wednesday, March 11, 2009 8:59 AM
> To: [log in to unmask]
> Subject: Re: Impacts of divers
> I work on Environmental Impact Assessment, especially with regards to
> fish ecology. I have never come across this before.
> We work a lot on the hearing capabilities of fish and impacts of noise.
> Generally salmonids are not as sensitive to noise as Clupeids. If they
> are not normally disturbed by boat noise or other noise impacts, I doubt
> divers will be of any concern in that regard.
> As for a visual impact I think that is covered by the previous response.
> It sounds like someone is taking concerns on environmental impacts a
> little too far...
> Dr Adam Payne
> Consultant
> EPD Marine Oil & Gas
> Eaton House
> Walbrook Court
> North Hinksey Lane
> Oxford OX2 0QS
> T: +44 1865 384 869 (Direct)
> F: +44 1865 384 848
> M: +44 7717 004 227
> [log in to unmask]
> -----Original Message-----
> From: Scientific forum on fish and fisheries
> [mailto:[log in to unmask]] On Behalf Of [log in to unmask]
> Sent: 11 March 2009 16:54
> To: [log in to unmask]
> Subject: Re: Impacts of divers
> who raised the question and God bless their pointy head ------ I have
> drift
> dived many streams and small rivers and have never observed any
> exceptional
> behavior by salmonids except a careful cautionary gaze and a tendency to
> keep
> their comfort distance ---- if your divers want to chase the sockeye
> that
> would probably tire them some and waste air --- so don't do that
> I am working on a project that will replace some anchor cables on the
> two floating bridges that cross Lake Washington in Seattle, Washington.
> The project will use a pair of divers to replace these cables in water
> from 40 to 200 feet deep. Lake Washington is the largest lake in
> Western Washington, and supports a number of salmonid species,
> including
> anadromous sockeye. Adult sockeye are known to find thermal refuge at
> 50 to 90 feet deep during the warmest part of the summer, and this
> season the population is expected to be 105,000.
> A question has arisen on the potential impact that two divers would
> have
> on these fish, and I am at a loss to find a source of information.
> Does
> anyone know, or can anyone provide best professional judgment, on the
> potential impact of a pair of divers moving vertically through the
> thermal refuge layers where sockeye would be dispersed?
> Brian Bigler
> NW Region Biology Program Manager
> Washington State Department of Transportation
> Seattle, WA
> Direct: 206-440-4519
> Cell: 206-919-1610
> FAX: 206-440-4805
> Russell
> Nelson Resources Consulting, Inc.
> 954 653 8295
> 561 449 9637
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