Comparison of mainstem spawning habitats for two populations of fall chinook salmon in the Columbia River basin

Spatial Consistency of Chinook Salmon Redd Distribution within and among Years in the Cowlitz River, Washington

“…We investigated these associations at a 500-m scale and found that depth discontinuities were not associated with redd locations in the Cowlitz River. Although we observed no association with channel gradient, lower-gradient areas typically have welldeveloped floodplains and gravel bars, and these areas have been Downloaded by [Loyola University Libraries] at 08:19 04 November 2014 shown to have high densities of Chinook Salmon redds in the Columbia River basin (Fulton 1968;Dauble and Geist 2000;Dauble et al 2003).…”

Spatial Consistency of Chinook Salmon Redd Distribution within and among Years in the Cowlitz River, Washington

“…We investigated these associations at a 500-m scale and found that depth discontinuities were not associated with redd locations in the Cowlitz River. Although we observed no association with channel gradient, lower-gradient areas typically have welldeveloped floodplains and gravel bars, and these areas have been Downloaded by [Loyola University Libraries] at 08:19 04 November 2014 shown to have high densities of Chinook Salmon redds in the Columbia River basin (Fulton 1968;Dauble and Geist 2000;Dauble et al 2003).…”

Linking channel geomorphic characteristics to spatial patterns of spawning activity and discharge use by Atlantic salmon (Salmo salar L.)

“…As a consequence, the Allt a' Ghlinne Bhig is a more dynamic system, exhibiting a greater degree of lateral channel migration (evidenced through a higher sinuosity, Table 1) and characterised by a generally higher sediment supply to transport capacity ratio. This produces the response reach types and associated morphological units (e.g., transverse bars) that this and other studies demonstrate are important for spawning salmonids (Geist and Dauble, 1998;Dauble and Geist, 2000;Webb et al, 2001;Moir et al, 2002). Differences seem most likely to be related to the different glacial histories of the two streams, although assessment of this link was beyond the scope of the present study.…”

Migratory behaviour of spawning rainbow trout ( Oncorhynchus mykiss ) in the Tongariro River, New Zealand, after habitat alteration

“…The large floods during 1998 altered the distribution and characteristics of the gravel throughout the river and made the channel pattern more complex. Dauble & Geist (2000) explained that the more complex the channel pattern, the more likely are downwelling and upwelling zones, conditions which may ultimately affect where salmonids spawn; explaining the shift in spawning site preference observed in this study. From our observation it appears that the floods had a beneficial effect by creating conditions suitable for spawning in the middle section that was the least attractive for spawning fish in 1995.…”

Spatial Consistency of Chinook Salmon Redd Distribution within and among Years in the Cowlitz River, Washington

“…We investigated these associations at a 500-m scale and found that depth discontinuities were not associated with redd locations in the Cowlitz River. Although we observed no association with channel gradient, lower-gradient areas typically have welldeveloped floodplains and gravel bars, and these areas have been Downloaded by [Loyola University Libraries] at 08:19 04 November 2014 shown to have high densities of Chinook Salmon redds in the Columbia River basin (Fulton 1968;Dauble and Geist 2000;Dauble et al 2003).…”

Linking channel geomorphic characteristics to spatial patterns of spawning activity and discharge use by Atlantic salmon (Salmo salar L.)

“…As a consequence, the Allt a' Ghlinne Bhig is a more dynamic system, exhibiting a greater degree of lateral channel migration (evidenced through a higher sinuosity, Table 1) and characterised by a generally higher sediment supply to transport capacity ratio. This produces the response reach types and associated morphological units (e.g., transverse bars) that this and other studies demonstrate are important for spawning salmonids (Geist and Dauble, 1998;Dauble and Geist, 2000;Webb et al, 2001;Moir et al, 2002). Differences seem most likely to be related to the different glacial histories of the two streams, although assessment of this link was beyond the scope of the present study.…”

Migratory behaviour of spawning rainbow trout ( Oncorhynchus mykiss ) in the Tongariro River, New Zealand, after habitat alteration

“…The large floods during 1998 altered the distribution and characteristics of the gravel throughout the river and made the channel pattern more complex. Dauble & Geist (2000) explained that the more complex the channel pattern, the more likely are downwelling and upwelling zones, conditions which may ultimately affect where salmonids spawn; explaining the shift in spawning site preference observed in this study. From our observation it appears that the floods had a beneficial effect by creating conditions suitable for spawning in the middle section that was the least attractive for spawning fish in 1995.…”

Spatial Consistency of Chinook Salmon Redd Distribution within and among Years in the Cowlitz River, Washington

“…We investigated these associations at a 500-m scale and found that depth discontinuities were not associated with redd locations in the Cowlitz River. Although we observed no association with channel gradient, lower-gradient areas typically have welldeveloped floodplains and gravel bars, and these areas have been Downloaded by [Loyola University Libraries] at 08:19 04 November 2014 shown to have high densities of Chinook Salmon redds in the Columbia River basin (Fulton 1968;Dauble and Geist 2000;Dauble et al 2003).…”

Linking channel geomorphic characteristics to spatial patterns of spawning activity and discharge use by Atlantic salmon (Salmo salar L.)

“…As a consequence, the Allt a' Ghlinne Bhig is a more dynamic system, exhibiting a greater degree of lateral channel migration (evidenced through a higher sinuosity, Table 1) and characterised by a generally higher sediment supply to transport capacity ratio. This produces the response reach types and associated morphological units (e.g., transverse bars) that this and other studies demonstrate are important for spawning salmonids (Geist and Dauble, 1998;Dauble and Geist, 2000;Webb et al, 2001;Moir et al, 2002). Differences seem most likely to be related to the different glacial histories of the two streams, although assessment of this link was beyond the scope of the present study.…”

Migratory behaviour of spawning rainbow trout ( Oncorhynchus mykiss ) in the Tongariro River, New Zealand, after habitat alteration

“…The large floods during 1998 altered the distribution and characteristics of the gravel throughout the river and made the channel pattern more complex. Dauble & Geist (2000) explained that the more complex the channel pattern, the more likely are downwelling and upwelling zones, conditions which may ultimately affect where salmonids spawn; explaining the shift in spawning site preference observed in this study. From our observation it appears that the floods had a beneficial effect by creating conditions suitable for spawning in the middle section that was the least attractive for spawning fish in 1995.…”