Evaluation of Fall Chinook and Chum Salmon Spawning below Bonneville Dam; 2003-2004 Annual Report.
In 2003 a total of 253 adult fall chinook and 113 chum were sampled for biological data in the Ives and Pierce islands area below Bonneville Dam. Vital statistics were developed from 221 fall chinook and 109 chum samples. The peak redd count for fall chinook was 190. The peak redd count for chum was 262. Peak spawning time for fall chinook was set at approximately 24 November. Peak spawning time for chum occurred approximately 24 November. There were estimated to be a total of 1,533 fall chinook spawning below Bonneville Dam in 2003. The study area's 2003 chum population was estimated to be 688 spawning fish. Temperature unit data suggests that below Bonneville Dam 2003 brood bright stock, fall chinook emergence began on January 6, 2004 and ended 28 April 2004, with peak emergence occurring 13 April. 2003 brood juvenile chum emergence below Bonneville Dam began 22 February and continued through 15 April 2004. Peak chum emergence took place 25 March. A total of 25,433 juvenile chinook and 4,864 juvenile chum were sampled between the dates of 20 January and 28 June 2004 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%%727
- 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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