Tuesday, May 5, 2009

What is a Rotary Screw Trap

Tegan and I caught up with Katy and Christine from the Zig Zag Forest Service yesterday. We checked out the screw trap and looked at smolts captured in the trap, on a tributary to the Sandy River. A screw trap captures smolts migrating from their home waters out to the ocean. Katy and Christine are collecting fish data such as weight and length of fish to monitor the overall health of the river or tributary, and estimate a population return for future years.