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Evaluation of Dual Frequency Identification Sonar (DIDSON) for Monitoring Pacific Lamprey Passage at Fishways of Bonneville and John Day Dams, 2012.
| 题名： | Evaluation of Dual Frequency Identification Sonar (DIDSON) for Monitoring Pacific Lamprey Passage at Fishways of Bonneville and John Day Dams, 2012. |
| 作者： | Johnson, E. L.; Clabough, T. S.; Keefer, M. L.; Caudill, C. C.; Johnson, P. N.; Kirk, M. A.; Jepson, M. A. |
| 关键词： | Dams, Fishes, Sonar, Cameras, Columbia River, Comparison, Depth, Distribution, Efficiency, Estimates, Frequency, Monitoring, Orientation(Direction), Patterns, Quality control, Sampling |
| 摘要： | Adult Pacific lamprey (Entosphenus tridentatus) passage efficiency in fishway entrances and through fishway transition pools has often been low in Columbia River basin radiotelemetry studies. In the summer of 2012, we conducted a Dual-Frequency Identification Sonar (DIDSON) study at Bonneville and John Day dams to evaluate Pacific lamprey passage behavior at fine scales (1-5 m). Our broad objectives were to collect pre-modification behavior data at the Bonneville Dam north downstream entrance (where a lamprey passage system is being installed in 2013) and pre- and post-modification data at the John Day north fishway where a bollard field was installed in early 2012 and a lamprey passage system (LPS) is being installed in 2013. Additional objectives included evaluations of upstream and downstream lamprey movements, lateral and vertical distributions of lamprey in the fishway entrance, junction pool, and transition pool areas, and lamprey response to white sturgeon (Acipenser transmontanus) and to reduced night-time flow operations at Bonneville Dam. A DIDSON camera was used to monitor horizontal depth strata by placing at different depths or by using an automatic tilting program from 13 June to 18 July at two locations at Bonneville Dam (Powerhouse 2 north downstream and Washington-shore junction pool). The DIDSON camera was then deployed at John Day Dam using a tilting program from 26 July to 30 August at four locations (near the north fishway entrance, upstream from the entrance, at the turnpool, and at the transition pool). Data were collected in high frequency mode at each location for approximately 24 hours per deployment cycle. DIDSON images were primarily collected in landscape mode, with the long axis of the sample volume parallel to the ground to obtain information on upstream and downstream movements and to assess horizontal distribution. |
| 报告类型： | 科技报告 |
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