DESCRIPTION
San Juan County, WRIA 2, has 408 miles of shoreline ranging from protected bays and salt marshes to coarse, high-energy beaches. SRFB-funded projects by Barsh and Wyllie-Echerria found that juvenile Chinook congregate on WRIA 2 shorelines much of the year, but are selective in their choice of habitats. WRIA 2 places highest priority on determining which WRIA2 habitats are preferred by juvenile Chinook to provide a geographical focus for protection and restoration.
A Round 8 proposal by the Skagit River Systems Cooperative addressed habitat preferences broadly: when and where do Chinook congregate in WRIA 2? Our project focused on the prey resources that Chinook actually utilize in preferred habitats. We used non-lethal gut lavage and visual identification to determine which WRIA 2 prey were being utilized by the Chinook collected by the SRSC study in 2008, and by our own locally recruited and trained volunteers in 2009-2011; in particular, the extent to which juvenile Chinook depend on terrestrial (thus more human-influenced) prey resources during their residence in WRIA 2. Prey utilization data enabled us to devise a model of prey utilization, and make concrete prescriptions for protection and restoration of WRIA 2 sites where salmon congregate.
We built on and expanded our “food security for salmon” community project on Waldron Island to engage landowners directly in research (as prey-item counters) and formulating land-use prescriptions, focusing on two juvenile salmon “hot spots” previously identified on President Channel (Waldron-Orcas) and south Lopez Island.