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Modeling population responses of Chinook and coho salmon to suspended sediment using a life history approach

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  • Araujo, H. Andres
  • Cooper, Andrew B.
  • MacIsaac, Erland A.
  • Knowler, Duncan
  • Velez-Espino, Antonio

Abstract

This study develops a quantitative framework for estimating the effects of extreme suspended-sediment events (SSC>25 mg L−1) on virtual populations of Chinook (Oncorhynchus tshawytscha) and coho (O. kisutch) salmon in a coastal watershed of British Columbia, Canada. We used a life history model coupled with a dose–response model to evaluate the populations’ responses to a set of simulated suspended sediments scenarios. Our results indicate that a linear increase in SSC produces non-linear declining trajectories in both Chinook and coho populations, but this decline was more evident for Chinook salmon despite their shorter fresh-water residence. The model presented here can provide insights into SSC impacts on population responses of salmonids and potentially assist resource managers when planning conservation or remediation strategies.

Suggested Citation

  • Araujo, H. Andres & Cooper, Andrew B. & MacIsaac, Erland A. & Knowler, Duncan & Velez-Espino, Antonio, 2015. "Modeling population responses of Chinook and coho salmon to suspended sediment using a life history approach," Theoretical Population Biology, Elsevier, vol. 103(C), pages 71-83.
    • Handle: RePEc:eee:thpobi:v:103:y:2015:i:c:p:71-83
    DOI: 10.1016/j.tpb.2015.04.003
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