Evaluation of Fall Chinook and Chum Salmon Spawning below Bonneville Dam; 2002-2003 Annual Report.
In 2002 a total of 364 adult fall chinook and 472 chum were sampled for biological data in the Ives and Pierce islands area below Bonneville Dam. Vital statistics were developed from 290 fall chinook and 403 chum samples. The peak redd count for fall chinook was 214. The peak redd count for chum was 776. Peak spawning time for fall chinook was set at approximately 15 November. Peak spawning time for chum occurred approximately 6 December. There were estimated to be a total of 1,881 fall chinook spawning below Bonneville Dam in 2002. The study area's 2002 chum population was estimated to be 4,232 spawning fish. Temperature unit data suggests that below Bonneville Dam 2002 brood bright stock, fall chinook emergence began on February 3 2003 and ended 7 May 2003, with peak emergence occurring 20 April. 2002 brood juvenile chum emergence below Bonneville Dam began 27 January and continued through 6 April 2003. Peak chum emergence took place 1 March. A total of 10,925 juvenile chinook and 1,577 juvenile chum were sampled between the dates of 24 January and 21 July 2003 below Bonneville Dam. Juvenile chum migrated from the study area in the 40-55 mm fork lengthmore »
- Publication Date:
- OSTI Identifier:
- Report Number(s):
R&D Project: 199900301; TRN: US200621%%726
- DOE Contract Number:
- Resource Type:
- Technical Report
- Research Org:
- Bonneville Power Administration (BPA), Portland, OR
- Sponsoring Org:
- Country of Publication:
- United States
- 13 HYDRO ENERGY; 54 ENVIRONMENTAL SCIENCES; ADULTS; COLUMBIA RIVER; DNA; EVALUATION; JUVENILES; REARING; SALMON; SAMPLING; STATISTICS; STREAMS Chum salmon - Spawning - Columbia River; Chinook salmon - Spawning - Columbia River
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