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Subject: Electroshock procedures
From: Craig Fusaro <[log in to unmask]>
Reply-To:Academic forum on fisheries ecology and related topics <[log in to unmask]>
Date:Mon, 2 Dec 1996 14:40:55 -0800
Content-Type:TEXT/PLAIN
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TEXT/PLAIN (35 lines)


Fellow fish ecology listmembers;

I've been asked to review a fish rescue plan to recover steelhead from the
stilling basin below the spillway of Bradbury Dam on the Santa Ynez R.,
Santa Barbara Co., Calif, USA. One section of the plan discusses
electrofishing, as follows:

"Do (sic) to the irregular or rocky conditions electrofishing may be
required... Fish will be collected using pulsed direct current with
voltage set at 200-300 volt and 0.1 to 2.0 amps output... Pulse frequency
and pulse width will be set to induce involuntary swimming action with
minimum harm to fish."

I am not an electrofisher, and have several questions regarding these
procedures. Perhaps someone in this forum could respond. My questions are
as follows:

1. Is electrofishing really effective in five to ten foot water depth?

2. Are the pulse voltage and current settings specified appropriate for
these water depths?

3. Would mortalities reasonbly be expected under the regimen described
above, and, if so, what could be expected in terms of percent deaths?

This project has a "short fuse" (possible dewatering of stilling basin
during the month of December) so any quick responses will be
appreciated, either through the "backchannel" direct, or through the list
forum. Thanks in advance to any respondees.
      ____________________________________
     /                                    ---------.........
    /      Craig Fusaro, [log in to unmask]                      \
   /        +Santa Barbara City College                      \
  /         +Joint Oil/Fisheries Liaison Office               \  __//_
 /Q         +California Trout, Inc.                           J <_)___><<

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