Feasibility of Documenting and Estimating Adult Fish Passage at Large Hydroelectric Facilities in the Snake River Using Video Technology; 1993 Final Report.
Lower Granite Dam on the Snake River to evaluate the feasibility of using video technology to document and estimate fish ladder passage of chinook salmon Oncorhynchus tshawytscha, sockeye salmon O. nerka, and steelhead O. mykiss. A video system was to produced video images during salmon passage periods. A technician identified and counted fish images from the video record. Fish ladder passage estimates of target species made from the video record were similar to estimates made by on-site counters during daytime periods, indicating that the two methods were relatively precise. We also found that a significant percentage (6.4% and 8.3%) of target salmonids migrated during nighttime periods when on-site counts were not typically made during the two years of study. Analysis of the video record permitted verification of individual sockeye salmon identified and counted by on-site count personnel, and provided data useful to managers of this ESA-listed stock. Analysis of the video record also permitted collection of additional data such as length measurements of individual specimens, which was used to regulate a fishery located upstream.
- Research Organization:
- Columbia River Inter-Tribal Fish Commission
- Sponsoring Organization:
- US Bonneville Power Administration
- DOE Contract Number:
- 1992BP61404
- OSTI ID:
- 30285
- Report Number(s):
- DOE/BP-61404-2; TRN: US200306%%78
- Resource Relation:
- Other Information: Supercedes report DE95005617; PBD: 1 Jul 1994; PBD: 1 Jul 1994; PBD: 1 Jul 1994
- Country of Publication:
- United States
- Language:
- English
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