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GLIN==> Fish Containment Barriers - Help Request (fwd)





	In case she hasn't already made contact with the right folks in the GL
region, I thought I would forward this out.

	Allegra

>---------- Forwarded message ----------
>Date: Thu, 8 Jul 1999 13:35:29 -0400
>From: Luca Cargnelli <luca.cargnelli@ANRMAIL.ANR.STATE.VT.US>
>To: FWIM-L@LISTSERV.VT.EDU
>Subject: Fish Containment Barriers - Help Request
>
>Sorry for any cross-posting.
>
>Iím looking for information or guidance regarding the use of a physical
>barrier to keep fish out of a certain area of a lake.
>
>An exotic fish species, the alewife, was recently discovered in Lake St.
>Catherine, a small lake in central Vermont.  The lake has a single outflow
>and a direct water connection to southern Lake Champlain.  One of the
>top priorities for management of this non-indigenous species is to
>ensure that it does not escape Lake St. Catherine and make its way to
>Lake Champlain.
>
>We are currently investigating different types of barriers that could be
>placed on or near the lakeís outflow to block out-migration of alewives.
>We have obtained information on behavioral barriers such as high
>frequency sound or electricity and are currently looking at the possibility
>of a physical barrier at the outflow.
>
>Lake St. Catherine is comprised of three sections.  The main lake has a
>surface area of 850 acres and is connected by shallow channels to Lilly
>Pond (20 acres) to the north and Little Pond (180 acres) to the south.
>The outflow is at the southern end of the lake.  Water flows out of the
>southern end of Little Pond, through a narrow, several hundred foot long
>channel and over a 5 foot high, 87 foot wide concrete spillway dam into
>Mill Brook.
>
>Iím looking for any information or advice that I can get regarding the use
>of a physical barrier at this outflow.  For starters, what different types of
>barriers are available to us (e.g., screens, vertical bars, etc.)?   If
anyone
>can direct me to companies that make or install barriers or to useful
>references, that would be greatly appreciated.  Iíd love to hear from
>anyone who has had experience with the use of physical barriers to
>contain fish.
>
>Thanks,
>Luca Cargnelli
>
>___________________________________________
>Luca Cargnelli
>Vermont Dept. Fish & Wildlife
>317 Sanitorium Rd., West Wing
>Pittsford, Vermont  05763
>
>Office  802-483-2172
>Direct  802-483-2738
>Fax     802-483-9374
>E-mail  luca.cargnelli@anrmail.anr.state.vt.us
>___________________________________________
>
>
>
>
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