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Boat-based Electrofishing: Principles and Practices

Effective Use of Boat Electrofishers for Fish Capture and Minimal Trauma
Course ID: BIO-408

April 28 - 30, 2010, 8:30 A.M. to 5 P.M. (3 Days)
The University of Maine
Orono, Maine 04469

Instructor: Dr. James B. Reynolds


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Description: Electrofishing is an effective way to sample freshwater fish populations. However, electrofishing may cause fish injury or mortality. Proper balance between efficient sampling and minimal harm is achieved through the knowledge of electrofishing principles and proper use techniques. This three-day course is intended to meet the National Marine Fisheries Service (NMFS) training requirements for electrofishing field staff. The NMFS guidance and training requirements document may be downloaded here

Course Topics:

Electric Circuits and Fields
- Principles and terminology
- Characteristics of AC, DC and pulsed DC waveforms
- Power transfer
- Electric field characteristics
- Effects of size, shape and spacing of electrodes
- Water conductivity measurement

Fish Behavior and Welfare
- Fish reactions in AC, DC and pulsed DC fields
- Attracting fish for capture
- Causes and reductions of fish stress
- Types and causes of fish injury
- Reducing fish injury and mortality
- Effects of electroshock on fish eggs and invertebrates
- Obtaining permits for boat electrofishing

Boat Electrofishing Systems
- System components
- Types of equipment
- Evaluating output
- Troubleshooting problems
- Understanding settings
- Safety features

Boat Operations and Safety
- Safe use of boat electrofishing equipment
- Common safety issues
- Safety policies
- Crew organization
- Role of first aid and CPR training

Field Trip Exercises
- Waveform output evaluation
- Electrode resistance measurement
- Electrical field mapping
- Voltage threshold for fish capture
- Fish capture techniques
- Fish holding, handling, and release
- Field data requirements

Sampling Design and Applications
- Goal-oriented designs
- Factors affecting electrofishing efficiency
- Use and validity of electrofishing data
- Development of standardized power tables

Intended Audience: This course is intended for biologist, field personnel, and other professionals seeking an improved understanding of the principles and techniques of electrofishing.

What to Bring: All participants must bring a notebook, pen/pencil, electronic calculator, and bottle of water. Please also bring insulated rubber gloves and knee boots or hip waders and dress for prevailing weather during the field trip. You are also encouraged to bring your own boat electrofishing unit if you have access to one. You will gain knowledge of the specific optimal settings for your unit paired with hands-on experience using it in the field. There will be boat electrofishing equipment available to those who do not bring their own.

About the Instructor: Dr. James B. (Jim) Reynolds is Professor Emeritus of Fisheries at the University of Alaska Fairbanks where he served on the faculty from 1978-1999. Jim is a recognized authority on electrofishing and ecology of northern fishes. He has taught electrofishing short courses to over 1,500 biologists in the U.S. and Canada, is the author of the chapter on electrofishing in "Fisheries Techniques" published by the American Fisheries Society, and has written numerous research articles on the subject. Jim is Past President of the Education and Fisheries History sections of the American Fisheries Society in both Missouri and Alaska. He has also provided technical oversight for the NOAA Fisheries electrofishing guidelines.

Continuing Education Units: 2.0 CEU's

Registration: $800/$700*
(*reduced tuition is available to employees of Native American tribes, government agencies, and nonprofits; students; and AFS and NAEP members).
You may register via the link below or by calling the Northwest Environmental Training Center at 206-762-1976. Register Online!

Cancellation Policy: Registration fees are fully refundable up to 30 days prior to the event and 50 percent refundable (or 100% credit) thereafter up to 3 business days prior to the event. No refunds are issued for cancellations occurring less than 3 business days before the start day.

Northwest Environmental Training Center
A 501(c)(3) non-profit program of EOS Alliance
650 S. Orcas Street, Suite 220 | Seattle, Washington 98108
Phone: (206)762-1976 | Fax: (206)762-1979
www.nwetc.org