Coho salmon spawning preference in artificial stream channels at the Oregon Hatchery Research Center. Leanne Weiss Advisor: Desiree Tullos. wildernessclassroom.com/.../coho%20salmon.jpg. What factors impact where salmon spawn?. Common descriptors of spawning habitat:. Gravel size
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Advisor: Desiree Tullos
Common descriptors of spawning habitat:
What other factors impact where salmon spawn? stream channels at the
How do Hyporheic processes effect fish and their choice of spawning habitat?
Upwelling areas of groundwater discharge into stream water
Downwelling areas of stream water discharge into groundwater
Piezometers following variables:
Vertical Hydraulic Gradient
From Dahm et al. 2006
Slug tracer test
Enter in a known concentration of NaCl and measure conductivity
Cumulative particle distribution (surface/subsurface)
Subsurface d50 for non redd and redd sites following variables:
Most literature shows upwelling or downwelling to be the most important factor in spawning location
Possible reasons my data did not show this
ESA “critical habitat”
Better ways to create artificial habitat
Works Cited inPresentation
Arntzen, E.V., Geist, D.R., Dresel, P.E. 2006. Effects of fluctuating river flow on groundwater/surface water mixing in the hyporheic zone of a regulated, large cobble red river. River Res. Applic. 22:937-946.
Dahm, C.N, Valett, H.M., Baxter, C.V. 2006. Chapter 6: Hyporeheic Zones. In Hauer, F.R., Lamberti, G.A. (eds.), 2006 Methods in Stream Ecology (pp 119-144). Oxford UK: Elsevier.