Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Pasage Behavior and Survival of Hatchery Yearling Chinook Salmon Passing Ice Harbor and McNary Dams During a Low Flow Year, 2001
In 2001, the National Marine Fisheries Service (NMFS) conducted research to evaluate survival and approach and passage behavior at Ice Harbor Dam for river-run hatchery yearling chinook salmon (Oncorhynchus tshawytscha). This study took place during a drought year which resulted in no spill at dams like Ice Harbor Dam, which have no holding raceways for transporting fish. Specific goals of the research were: (1) to estimate project and bypass survival through Ice Harbor Dam, (2) to estimate survival through partitioned reaches between Ice Harbor and McNary Dam, (3) to evaluate approach and passage behavior at Ice Harbor and McNary Dam, and (4) to compare methodologies (PIT tag vs. radiotelemetry) for use in estimating survival. Study fish were collected at Lower Monumental Dam, tagged either with a PIT tag or with both a radio transmitter and a PIT tag, and released 5.0 km upstream from Ice Harbor Dam or into the juvenile bypass outfall pipe just downstream from the Ice Harbor Dam smolt monitoring facility. Reach survival was estimated for radio-tagged fish from detections at radiotelemetry receiver transects located in the forebay and tailrace of Ice Harbor Dam, Strawberry Island, Sacajawea Park at the mouth of the Snake River, Port Kelley, McNary Dam, and at the mouth of the Umatilla River. Tagging methodologies were compared using PIT-tag detections from McNary, John Day, and Bonneville Dams and from detections in the Columbia River estuary by the NMFS PIT-tag detector trawl. Project survival through Ice Harbor Dam (from the forebay of Ice Harbor Dam to Strawberry Island) for radio-tagged hatchery yearling chinook salmon was 0.936 (95% CI: 0.895-0.977). Survival estimates to McNary Dam for radio-tagged fish and PIT-tagged fish released 5 km upstream from Ice Harbor Dam were 0.744 (95% CI: 0.715-0.773) and 0.724 (95% CI: 0.708-0.740), respectively. An estimate of survival from the Ice Harbor juvenile bypass system to Strawberry Island for radio-tagged fish released 5 km upstream from Ice Harbor Dam was 0.996 (95% CI: 0.947-1.045). Survival probability to McNary Dam for radio-tagged fish released into the bypass outfall pipe at Ice Harbor Dam was estimated at 0.801 (95% CI: 0.774-0.828).
Pasage Behavior and Survival of Hatchery Yearling Chinook Salmon Passing Ice Harbor and McNary Dams During a Low Flow Year, 2001
In 2001, the National Marine Fisheries Service (NMFS) conducted research to evaluate survival and approach and passage behavior at Ice Harbor Dam for river-run hatchery yearling chinook salmon (Oncorhynchus tshawytscha). This study took place during a drought year which resulted in no spill at dams like Ice Harbor Dam, which have no holding raceways for transporting fish. Specific goals of the research were: (1) to estimate project and bypass survival through Ice Harbor Dam, (2) to estimate survival through partitioned reaches between Ice Harbor and McNary Dam, (3) to evaluate approach and passage behavior at Ice Harbor and McNary Dam, and (4) to compare methodologies (PIT tag vs. radiotelemetry) for use in estimating survival. Study fish were collected at Lower Monumental Dam, tagged either with a PIT tag or with both a radio transmitter and a PIT tag, and released 5.0 km upstream from Ice Harbor Dam or into the juvenile bypass outfall pipe just downstream from the Ice Harbor Dam smolt monitoring facility. Reach survival was estimated for radio-tagged fish from detections at radiotelemetry receiver transects located in the forebay and tailrace of Ice Harbor Dam, Strawberry Island, Sacajawea Park at the mouth of the Snake River, Port Kelley, McNary Dam, and at the mouth of the Umatilla River. Tagging methodologies were compared using PIT-tag detections from McNary, John Day, and Bonneville Dams and from detections in the Columbia River estuary by the NMFS PIT-tag detector trawl. Project survival through Ice Harbor Dam (from the forebay of Ice Harbor Dam to Strawberry Island) for radio-tagged hatchery yearling chinook salmon was 0.936 (95% CI: 0.895-0.977). Survival estimates to McNary Dam for radio-tagged fish and PIT-tagged fish released 5 km upstream from Ice Harbor Dam were 0.744 (95% CI: 0.715-0.773) and 0.724 (95% CI: 0.708-0.740), respectively. An estimate of survival from the Ice Harbor juvenile bypass system to Strawberry Island for radio-tagged fish released 5 km upstream from Ice Harbor Dam was 0.996 (95% CI: 0.947-1.045). Survival probability to McNary Dam for radio-tagged fish released into the bypass outfall pipe at Ice Harbor Dam was estimated at 0.801 (95% CI: 0.774-0.828).
Pasage Behavior and Survival of Hatchery Yearling Chinook Salmon Passing Ice Harbor and McNary Dams During a Low Flow Year, 2001
G. A. Axel (Autor:in) / E. E. Hockersmith (Autor:in) / M. B. Eppard (Autor:in) / B. P. Sandford (Autor:in) / S. G. Smith (Autor:in)
2003
43 pages
Report
Keine Angabe
Englisch
| Engineering Index Backfile | 1953
Large scale construction at McNary
Engineering Index Backfile | 1949