Trinity River Spawn Survey 9/23/2016
The US Fish and Wildlife Service along with the Yurok Tribe, California Department of Fish and Wildlife, US Forest Service, and Hoopa Valley Tribe have another weekly update for our Trinity River mainstem spawn survey. The full update is posted on the Arcata Fish and Wildlife Fisheries webpage.
This week our crews mapped 12 redds (13 total for the year) in the Reaches from Lewiston Dam to Cedar Flat (excluding Pigeon Point). The graph below is clipped from our weekly report (limited to the river upstream of Cedar Flat).
During the mainstem Trinity River spawn surveys there are three populations of salmon that are encountered: spring-run Chinook, fall-run Chinook, and Coho salmon. We generally see spring-run Chinook Salmon begin spawning the earliest, around mid-September. This is followed by peak fall-run Chinook Salmon spawning in mid-October. Coho salmon begin spawning late in the year, around late-November. Our surveys only partially cover the Coho Salmon spawning season, which continues beyond our last surveys in December.