Environmental Biology of Fishes

, Volume 93, Issue 2, pp 233–243 | Cite as

Defining marine habitat of juvenile Chinook salmon, Oncorhynchus tshawytscha, and coho salmon, O. kisutch, in the northern California Current System

  • Suzan S. Pool
  • Douglas C. Reese
  • Richard D. Brodeur
Article

Abstract

We investigated habitat use by juvenile Chinook salmon (Oncorhynchus tshawytscha) and coho salmon (O. kisutch) to identify environmental characteristics that may define their optimal marine habitat. We utilized physical and biological data from four cruises in the northern California Current system from Newport, Oregon, to Crescent City, California, in June and August 2000 and 2002. A non-parametric statistical method was used to analyze and select environmental parameters that best defined ocean habitat for each species. Regression trees were generated for all cruises combined to select the most important habitat variables. Chlorophyll a concentration best defined habitat of yearling Chinook salmon, while decapod larvae, salinity, and neuston biovolume defined habitat of yearling coho salmon. Using criteria from the regression tree analysis, GIS maps were produced to show that the habitat of yearling Chinook salmon was widespread over the continental shelf and the habitat of yearling coho salmon was variable and mainly north of Cape Blanco.

Keywords

Regression trees GIS Coho salmon Chinook salmon California Current Habitat 

Notes

Acknowledgements

U.S. GLOBEC provided support for the trawling cruises and data synthesis project on juvenile salmon (contribution 704). Hongsheng Bi, Ed Casillas, Joe Fisher, and three anonymous reviewers provided suggestions for improving the manuscript.

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Suzan S. Pool
    • 1
  • Douglas C. Reese
    • 2
  • Richard D. Brodeur
    • 3
  1. 1.Cooperative Institute for Marine Resources StudiesOregon State UniversityNewportUSA
  2. 2.Department of Fisheries and WildlifeOregon State UniversityCorvallisUSA
  3. 3.Northwest Fisheries Science CenterNational Oceanic and Atmospheric AdministrationNewportUSA

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