SONOMA ECOLOGY CENTER
The abundant rainfall that Sonoma County received in late October created ideal conditions for Chinook (King salmon) to return to Sonoma Creek. Several streamside residents contacted Sonoma Ecology Center with the news and sent in photos and videos of salmon transiting their favorite creek viewing spots. In response, SEC’s Richard Dale and Research Program Manager and aquatic scientist Steven Lee jumped into action and ran out to the creeks to document the event. One outcome was this amazing video Steven assembled of the salmon as they made their journey upstream and began settling into their spawning habitats.
Chinook were known to have successfully spawned in Sonoma Creek a few years ago, and it’s possible some of these are their offspring returning to spawn. The Sonoma Ecology Center has conducted studies of young fish migrating out of Sonoma Creek and found, in addition to steelhead, a surprising number of young Chinook are heading out to the bay and ocean. It’s hard to know for sure if these fish originate from Sonoma Creek – there are many salmon released from hatcheries in the Central Valley who could be making their way up our waterways. Some of the fish we observed do have clipped adipose fins – an indication that they were raised in a hatchery. However, many of the fish in Sonoma Creek right now lack this indicator and their size suggests that they are the right age to have come from the last run here.