Coho Smolt Monitoring

2016 Smolt Trap Counts

Funnel net traps are operated on Mill, Green Valley, and Willow creeks each spring to monitor the downstream migration of coho smolts as they make their way to the ocean. The data collected during our smolt trapping efforts allows us to estimate smolt abundance and average size, and to determine overwinter survival and growth of fall-released fish. Trapping also offers an opportunity to collect genetic samples from wild coho smolts to determine whether they are offspring of wild adults or Broodstock Program fish. PIT tag numbers denote release stream and season, which allows us to evaluate the effectiveness of different stocking strategies for adaptive management feedback to the Broodstock Program.