Hydrobiologia

, Volume 625, Issue 1, pp 27–42

Relationship of winter concealment habitat quality on pool use by juvenile spring Chinook salmon (Oncorhynchus tshawytscha) in the Grande Ronde River Basin, Oregon USA

  • Erick S. Van Dyke
  • Dennis L. Scarnecchia
  • Brian C. Jonasson
  • Richard W. Carmichael
Primary research paper

DOI: 10.1007/s10750-008-9684-6

Cite this article as:
Van Dyke, E.S., Scarnecchia, D.L., Jonasson, B.C. et al. Hydrobiologia (2009) 625: 27. doi:10.1007/s10750-008-9684-6

Abstract

Winter concealment habitat quality was assessed and its use by juvenile spring Chinook salmon (Oncorhynchus tshawytscha) quantified in three hatching areas of the Grande Ronde River Basin, Oregon USA. Fish densities were significantly higher in pools with a higher winter concealment habitat index than pools with a lower index. The mean fork length and mean growth rate of fish did not differ between pools with a higher or lower winter concealment habitat index, even though residual fish were significantly larger than fish that emigrated. Biomass–density was significantly higher in pools with a higher winter concealment habitat index than pools with a lower index in all three hatching areas. Biomass–density was positively associated with the amount of cobble substrate (10–24.9 cm/m2) in all three hatching areas, and inversely associated with embeddedness in two of the hatching areas. Results of this study indicate that enhancing winter concealment habitat could improve habitat quality resulting in increased carrying capacity and winter usage by juvenile spring Chinook salmon.

Keywords

Fish sizeFish densityNocturnal activityWinter habitat useWater temperatureBiomass

Supplementary material

10750_2008_9684_MOESM1_ESM.doc (42 kb)
Supplementary material (DOC 42 kb)

Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Erick S. Van Dyke
    • 1
  • Dennis L. Scarnecchia
    • 2
  • Brian C. Jonasson
    • 3
  • Richard W. Carmichael
    • 3
  1. 1.Oregon Department of Fish and Wildlife, Ocean Salmon and Columbia River ProgramClackamasUSA
  2. 2.Department of Fish and Wildlife ResourcesUniversity of IdahoMoscowUSA
  3. 3.Oregon Department of Fish and Wildlife, NE Region Fish Research and DevelopmentLa GrandeUSA