Trapping methods
Artificial refuge traps (ARTs)
Also referred to as ‘panpipe’ traps, are the most reliable and easy to use traps.
They are attached to trees on the riverbank and positioned on the bed of the river, weighed down by a large rock.
The plastic tubes mimic natural habitat and crayfish shelter inside.
As crayfish (and other aquatic creatures) can come and go as they please, these traps can safely be left in the river for long periods.
Baited traps
These come in a net or plastic basket version and work best in deeper water.
A bait (usually frozen marine fish) is used to attract crayfish who crawl into the trap and can’t escape.
A narrow entrance hole prevents otters or other aquatic wildlife becoming trapped.
Unlike the ART, they physically trap crayfish and so have to be checked and emptied every 24 hours.