Our Work
Electrofishing Surveys
Electrofishing Surveys
Introduction to the project
Fish populations are a key component of the biodiversity of the river system. Good populations are indications of a naturally functioning river. They are also a key part of the food chain. Understanding the health of our fish populations will helps us understand how the river is operating and how it should be managed.
- To assess the populations of fish, especially trout, within the River Sid and its tributaries.
- To make comparisons in population change year on year.
- To use this information to inform future action to support fish species within the river
Project Details
Electro fishing is carried out by trained personnel of the Westcountry Rivers Trust. This usually takes place in September. Six sites were surveyed in 2023 and again in 2024. For 2025 this will be increased to 12 sites to ensure a comprehensive baseline assessment prior to works in the river. The data is going to be key in assessing the success of any future management of the river.
How does electrofishing work?
A trailing cathode and anode are put into the water and a small electric current is passed through. This temporarily stuns the fish and while they are inactive they are netted, their age and measurements are recorded, before they are placed back in the river.
Does this hurt the fish?
No. All this takes place quickly and the fish recover within a couple of minutes. This doesn’t hurt the fish, they are simply a bit stunned!
What happens with the results?
The records are shared with the Environment Agency, the West Country River’s Trust, and other organisations where appropriate.
Survey Results
Download the latest report below. Electrofishing surveys are currently being carried out for 2025 and we’ll publish this data on this page, and our Resources Page, once it’s available.
Other Projects
Take a look at some of our other work and projects.
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