Our counter on the River Frome at East Stoke, Dorset, uses electrodes to monitor the electrical resistance of the water. When a (less resistive) fish or object large enough to bridge the electrodes passes over them, the system records the passage and saves a video clip for later analysis. It logs hundreds of counts each year, both of fish and other things.
Here are some of the highlights showing the biggest and most notable sightings of last year.
We’ll be bringing regular videos of the counter in action throughout the year.
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Charity registered in England and Wales, 1112023, in Scotland SC038868