Aquatic Ecosystems: Current Research

Understanding and predicting Oregon coastal coho salmon freshwater survival

People Involved


In parallel to our completed study in the ocean environment (Logerwell et al. 2003), we are currently identifying the physical climate processes that affect freshwater productivity of Oregon coastal coho salmon. When complete, this work will be combined with our marine survival findings to develop a full life cycle/climate model for Oregon coastal coho.

Previous research suggests that flow/smolt-production relationships vary depending on each basin's hydrology and habitat characteristics. For instance, a limiting factor for smolt production in steep streams appears to be high spawning and incubation flows. For low-gradient streams, high spawning flows often benefit smolt production by increasing the amount of spawning habitat accessible to returning adults.

Research Questions

Selected References

For more publications on CIG's research on climate and PNW aquatic ecosystems, please see CIG Publications.

Logerwell, E. A., N. J. Mantua, P. Lawson, R. C. Francis, and V. Agostini. 2003. Tracking environmental processes in the coastal zone for understanding and predicting Oregon coho (Oncorhynchus kisutch) marine survival. Fisheries Oceanography 12(3):1-15.