DESCRIPTION
This project will begin to document, demarcate, and in cooperation with shoreline landowners, cordon contemporary herring spawning sites in the San Juan Islands; protect these areas from physical or chemical disturbance; develop and implement site-specific plans for stabilizing and expanding the vegetation on which herring eggs are being deposited; where appropriate and feasible, use rafts of tree boughs to shelter herring eggs from waterfowl to increase early survival; utilize signage and information activities to mobilize wider community support for protecting herring spawning habitat from degradation.
Herring historically spawned in a number of shallow vegetated bays on Lopez, Orcas, Waldron and San Juan Islands. Sporadic spawning has been observed in recent years in Mud Bay, Hunter Bay, Shoal Bay, Deer Harbor, Massacre Bay, and Fishing Bay (Eastsound). We documented substantial spawning in Fishing Bay in April 2011 and April 2012; however, several days predation by Surf Scoters, Buffleheads, Goldeneyes and gulls reduced survival considerably. At the same time, our juvenile Chinook monitoring stations at Watmough Bight and Cowlitz Bay recorded unusually high consumption of very young herring (under 45 mm) in summer 2011, likely from undocumented spawning around the islands. Our monitoring records from 2008-2011 suggest that juvenile Chinook and Coho in WRIA2 waters feed almost exclusively on herring if bioavailable, and alternatively on sandlance.