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The influence of water temperature on salmonid recruitment and adult size in tailwaters across western North America—Data

Data for journal manuscript: Warm water temperatures and shifts in seasonality increase trout recruitment but only moderately decrease adult size in western North American tailwaters.


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Dibble, K.L., Yackulic, C.B., and Kennedy, T.A., 2018, The influence of water temperature on salmonid recruitment and adult size in tailwaters across western North America—Data: U.S. Geological Survey data release,


These data were used to examine drivers behind changes in water temperature downriver of dams across the western U.S. from 1995-2015 and the influence of such changes on rainbow trout recruitment and rainbow and brown trout adult length. First, we linked reservoir storage capacity and dam size to the warmest monthly water temperature per water year (WY) to assess the influence of low storage capacity (shallow reservoirs) on downstream water temperature. We then took results from previously published Generalized Linear Mixed Models (GLMM) that assessed the influence of physical and biological predictors (e.g., flow, trout density, reservoir metrics) on trout recruitment and adult size and added mean annual, maximum annual, and minimum [...]


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USGS_2018_KDibble_Temperature_Effects_Tailwaters_Trout_Recruitment_Data.ods 53.38 KB


We obtained fishery monitoring data from state fishery management agencies that conduct research in tailwaters throughout the western US. These data included rainbow and brown trout adult size and the catch per kilometer of sub-adult fish (i.e., recruitment). These data were paired with physical and biological variables including water temperature, flow, reservoir attributes, and fish density to parse out the importance of water temperature relative to other variables on recruitment and the size structure of tailwater trout populations. We found that water temperature was a more important predictor of recruitment processes than adult size, but that density-dependent growth constraints could exacerbate temperature-dependent growth reductions. As such, these data and the resulting analyses could inform management of tailwater trout populations in a warmer and drier climate.


The authors of these data request that data users contact them regarding intended use and to assist with understanding limitations and interpretation. Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty.

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DOI doi:10.5066/F72806SS

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