A scale model is a physical representation of an object which maintains general relationships between its constituent aspects. Alternately, it is “a small copy of something” or “a miniature representation of something.” This blog describes electrical measurements made on a scale model, yet functional, electrofishing boat and how to scale those up or down to a full size boat. Warning, this will be a long blog, and it may contain errors of logic or calculation. You can use the MythBusters TV show approach and determine if you believe the assumptions are confirmed, plausible or busted.
Opportunity knocks! The National Conservation Training Center (U.S. Fish & Wildlife Service) is offering an electrofishing course in Fort Collins, Colorado during October 17 – 21, 2016. Please see course description, course flier, and registration process below.
Often electrofishing sampling is unsatisfactory (low effectiveness, high variance) due to reasons that include equipment limitations, insufficient understanding of equipment function, inadequate electrode design, and a lack of guidance regarding proper settings given prevailing water conditions and target species. This class addresses these factors and builds skills in participants that will enable them to tackle sampling issues and increase the efficiency and standardization of electrofishing.
In addition, participants learn how to evaluate gear performance and select suitable equipment, trouble-shoot equipment, assess likelihood of fish injury and use approaches to minimize the potential for stress and injury, and provide a safer operating environment for their crews.
This course covers all types of electrofishing gear types including boats, rafts, tow-barges, shore-based, backpack, electric seine, and pre-positioned.
Participants are encouraged to bring their equipment for evaluation which includes analysis of outputs, calibration check, electrode design, and a safety workup. Gear also is used for standardization exercises.
Registration process for non-Department of Interior Biologists: