|USFWS student intern Ben Leonard checks |
the screw trap for fish
Of course, these traps can’t catch every fish migrating downstream, so we have to test how efficient the trap is at catching fish. To do this, we release marked fish a few hundred meters upriver to see what percentage we catch in the trap. We put the marked fish in buckets (with aerators) and took them by canoe upriver to the release site (picture below). Not a bad job on a sunny day!
|Ben releases marked fish to check trap efficiency|