Smolt Monitoring Program Survival Data
The Fish Passage Center (FPC) coordinates the Smolt Monitoring Program (SMP). Data from this program is intended to provide the information basis for federal, state and tribal recommendations for anadromous fish passage in the Federal Columbia River Hydro-electric System (FCRPS). For instance, survival estimates are calculated for selected groups of migrant juvenile salmonids including the trap and hatchery releases above Lower Granite Dam making up a distinct reach, and hatchery releases in the Mid-Columbia to McNary Dam. Survival estimates are also calculated for index reaches between dams including for the Lower Snake River, the reach from Lower Granite to McNary Dam; Rock Island Dam to McNary Dam in the Mid-Columbia River; and McNary to Bonneville Dam in the Lower Columbia River.
Comparative Survival Study Survival Data
The FPC website also provides access to the Comparative Survival Study (CSS) data. The CSS was initiated in 1996 as a multi-year program of the fishery agencies and tribes to estimate survival rates over different life stages for spring and summer Chinook salmon produced in major hatcheries the Snake River basin and from selected hatcheries in the lower Columbia River. Much of the information evaluated in the CSS is derived from fish tagged with Passive Integrated Transponder (PIT) tags. A comparison of survival rates of Chinook marked in different regions provides insight into the effects of the hydrosystem. The CSS compares the smolt-to-adult survival rates (SARs) for Snake River wild and hatchery Chinook that were transported versus those that migrated inriver to below Bonneville Dam. SARs for wild and hatchery summer steelhead are also computed. These SAR estimates generate information reflecting the relative effects of the current management actions used to recover this listed species.
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