Standardising by power II

You can use this worksheet to apply your data collected in Standardising By Power I.Continue Reading..

Standardising by power I

Finding minimum power (voltage and current) levels for effective, successful electrofishing at a sampling site is important for several reasons.

Continue Reading..

Increasing capture efficiency and sampling precision

As an experienced user, your methodological aims likely include:

  1. develop and standardize species ‘x’ sampling protocols; and,
  2. collect more accurate and precise data to characterize species ‘x’ populations.

If this is the case the Framework for Increasing Capture Efficiency and Sampling Precision is for you. This tool provides a recipe for improving your electrofishing.

The PDF references several Excel worksheets developed by Jan Dean. They can be downloaded on this resources page.

 

Electrode resistance procedures

This document provides guidance for making electrode measurements on various gear types, using an external power source and an internal power source.Continue Reading..

How to use a backpack unit

Dr Alan Temple introduces the key concepts and methods of operating various backpack electrofishing units.

Boat electrofishing safety

Dr Alan Temple introduces the key concepts and methods of assessing the safety of boat electrofishing units.

How to make a voltage gradient probe

A voltage gradient probe is used to measure and map electrical fields produced by electrofishing units. It can be a valuable tool for assessing and standardising electrofishing equipment.

Download the PDF file with detailed DIY instructions.

 

How to trouble-shoot a backpack unit

In this video, Alan Temple describes how to use a multimeter to trouble-shoot a malfunctioning backpack unit.

Trouble-shooting equipment

The following description covers basic trouble-shooting tasks that can be performed in the field. Some companies also publish in-depth trouble-shooting guides for testing control boxes and branch circuitry. Always obtain trouble-shooting guides from the manufacturer of your equipment, if available.Continue Reading..

Electrofishing and fish health

spinal-injury-feature

A dorsal view X-ray of a rainbow trout revealing spinal fracture caused by electrofishing (source: N. G. Sharber).

As fish lovers and conservationists, we have a vested interest in maintaining fish health. As fisheries scientists, we have the responsibility of ensuring that our sampling techniques are as ethically transparent and non-invasive as possible. Many of us have moved from passive gear types, such as gill nets, to what are considered ‘less harmful’ methods, such as electrofishing. Continue Reading..

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