High Resolution Conductivity and Temperature Project – The role of Groundwater and Channel Morphology in redd site selection by Westslope Cutthroat Trout and Bull Trout
Author: C. McCutcheon
Study on the role of groundwater and channel morphology in redd site selection for Westslope Cutthroat Trout and Bull Trout.
The density of BT redds at Ram Creek was found to be positively correlated to average normalized temperature of runs and pools. The density of BT redds on Ram Creek was also found to be negatively correlated to localized cold spots. Riffles were identified as the coldest morphologic feature within both Ram Creek and Lizard Creek. No strong correlations between the macro-scale morphology and BT or WCT redds were observed. The channel slope for all the WCT spawning reaches are less than or equal to approximately 1%, which corresponds to the more gradual sub-reaches. For three of the four reaches where BT spawning was surveyed, redds were noted to have lower normalized valley offsets than the reach. Both BT and WCT redds were correlated to LWD, however WCT had a stronger correlation. Lessons were learned regarding the integration of morphologic river survey data with redd surveys.
The density of BT redds at Ram Creek was found to be positively correlated to average normalized temperature of runs and pools. The density of BT redds on Ram Creek was also found to be negatively correlated to localized cold spots. Riffles were identified as the coldest morphologic feature within both Ram Creek and Lizard Creek. No strong correlations between the macro-scale morphology and BT or WCT redds were observed. The channel slope for all the WCT spawning reaches are less than or equal to approximately 1%, which corresponds to the more gradual sub-reaches. For three of the four reaches where BT spawning was surveyed, redds were noted to have lower normalized valley offsets than the reach. Both BT and WCT redds were correlated to LWD, however WCT had a stronger correlation. Lessons were learned regarding the integration of morphologic river survey data with redd surveys.
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Additional Info
Study Years: 2018, 2017, 2016, 2015, 2014, 2013, 2012
Published: 2019
High Resolution Conductivity and Temperature Project – The role of Groundwater and Channel Morphology in redd site selection by Westslope Cutthroat Trout and Bull Trout
Author: C. McCutcheon
Tags: Bull Trout, Channel Morphology, Flow, Koocanusa Reservoir, Oncorhynchus Clarkii Lewisii, Redd Sites, Reservoir, Salvelinus Confluentus, Spawning, Temperature, Tributary, Upper Kootenay River, Westslope Cutthroat Trout
Study on the role of groundwater and channel morphology in redd site selection for Westslope Cutthroat Trout and Bull Trout.
Summary
The density of BT redds at Ram Creek was found to be positively correlated to average normalized temperature of runs and pools. The density of BT redds on Ram Creek was also found to be negatively correlated to localized cold spots. Riffles were identified as the coldest morphologic feature within both Ram Creek and Lizard Creek. No strong correlations between the macro-scale morphology and BT or WCT redds were observed. The channel slope for all the WCT spawning reaches are less than or equal to approximately 1%, which corresponds to the more gradual sub-reaches. For three of the four reaches where BT spawning was surveyed, redds were noted to have lower normalized valley offsets than the reach. Both BT and WCT redds were correlated to LWD, however WCT had a stronger correlation. Lessons were learned regarding the integration of morphologic river survey data with redd surveys.