Comparison of mainstem spawning habitats for two populations of fall chinook salmon in the Columbia River basin

Comparison of mainstem spawning habitats for two populations of fall chinook salmon in the Columbia River basin

Extensive hydroelectric development in the Columbia River system has eliminated most mainstem riverine habitat available for spawning by fall chinook salmon (Oncorhynchus tshawytscha). The two remaining populations, Hanford Reach, Columbia River and Hells Canyon Reach, Snake River, are separated geo...

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Veröffentlicht in:Regulated rivers 2000-07, Vol.16 (4), p.345-361
Hauptverfasser: Dauble, Dennis D., Geist, David R.
Format: Artikel
Sprache:eng
Schlagworte:
Animal, plant and microbial ecology
Applied ecology
Biological and medical sciences
Conservation, protection and management of environment and wildlife
Environmental degradation: ecosystems survey and restoration
Fundamental and applied biological sciences. Psychology
salmon
spawning habitat
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Zusammenfassung:Extensive hydroelectric development in the Columbia River system has eliminated most mainstem riverine habitat available for spawning by fall chinook salmon (Oncorhynchus tshawytscha). The two remaining populations, Hanford Reach, Columbia River and Hells Canyon Reach, Snake River, are separated geographically and their status is markedly different. Annual escapements to Hanford Reach have averaged approximately 80 000 adults, while the Snake River run size has declined to
ISSN:0886-9375
1099-1646
DOI:10.1002/1099-1646(200007/08)16:4<345::AID-RRR577>3.0.CO;2-R