This dataset contains the results from aging and back-calculation of length-at-age of scale samples from 502 Rainbow Trout captured in the Ashokan Reservoir between 1952 and 2017. The first six columns contain collection information including an assigned fish number, the year and period of capture, the basin of the Ashokan Reservoir from which a fish was captured, and the length and weight of the fish when it was captured. The final three columns present results from the aging and back-calculation procedures. Multiple rows of information often correspond to an individual fish and are designated by the "Fish number" column.

These data are the primary data used to model rainbow trout growth in Glen Canyon. Fish growth data were collected from nighttime boat electrofishing field campaigns conducted five to six times per year in April, July, September, and January, from April 2012 through November 2021 for a total of 9798 observations of mark-recapture-based growth. Sampling was conducted in a five km reach in the lower portion of the Glen Canyon tailwater (3.7-8.9 km upstream of Lees Ferry, AZ). Two nights of sampling occurred on each trip, with the central 2-3 km of the reach sampled on both nights. After capture, fish were kept in aerated 40-L buckets and transported to a central processing location. Groups of 10-15 fish were anesthetized and rainbow trout ≥ 75 mm were scanned and injected with a passive integrated transponders (PIT) tag if they had not been previously tagged. Fork length was measured to the nearest mm, and weight was measured to the nearest gram for fish ≥ 150 mm and to the nearest 0.1 g for smaller fish. Provided are tabulated data for fish forklength and weight at capture and recapture as well as estimates of rainbow trout biomass at each trip interval. We evaluated the effects of discharge, water temperature, competition for prey, solar insolation, soluble reactive phosphorus concentration, and the presence of absence of two experimental flows on growth rates of rainbow trout. These seven covariates were selected based on findings from previous modeling efforts and hypotheses regarding how experimental flows affect the rate of prey delivery, metabolic and foraging costs, foraging efficiency, and prey availability. Covariates are compiled as tabulated mean values for each reach and sampling trip and corresponding data sources.

These data are the primary data used to model rainbow trout growth in Glen Canyon. Fish growth data were collected from nighttime boat electrofishing field campaigns conducted five to six times per year in April, July, September, and January, from April 2012 through November 2021 for a total of 9798 observations of mark-recapture-based growth. Sampling was conducted in a five km reach in the lower portion of the Glen Canyon tailwater (3.7-8.9 km upstream of Lees Ferry, AZ). Two nights of sampling occurred on each trip, with the central 2-3 km of the reach sampled on both nights. After capture, fish were kept in aerated 40-L buckets and transported to a central processing location. Groups of 10-15 fish were anesthetized and rainbow trout ≥ 75 mm were scanned and injected with a passive integrated transponders (PIT) tag if they had not been previously tagged. Fork length was measured to the nearest mm, and weight was measured to the nearest gram for fish ≥ 150 mm and to the nearest 0.1 g for smaller fish. Provided are tabulated data for fish forklength and weight at capture and recapture as well as estimates of rainbow trout biomass at each trip interval. We evaluated the effects of discharge, water temperature, competition for prey, solar insolation, soluble reactive phosphorus concentration, and the presence of absence of two experimental flows on growth rates of rainbow trout. These seven covariates were selected based on findings from previous modeling efforts and hypotheses regarding how experimental flows affect the rate of prey delivery, metabolic and foraging costs, foraging efficiency, and prey availability. Covariates are compiled as tabulated mean values for each reach and sampling trip and corresponding data sources.

These data are the primary data used to estimate rainbow trout abundance and survival in the Colorado River, Glen and Grand Canyons. Refer to the analyses as per the associated journal manuscript (see Larger Work Citation). Prey availability, feeding efficiency, and competition reduce somatic growth and cause the collapse of a fish population" Nighttime boat electrofishing was used to sample rainbow trout four times per year in April, July, September, and January, from April 2012 through September 2016. A total of five reaches were sampled between Glen Canyon Dam (river kilometer [rkm] 0) to below the confluence with the Little Colorado River (located at rkm 130). Reaches ranged from two to six km in length. A total of 47,056 individual rainbow trout were tagged with passive integrated transponders (PIT) over the first 18 trips across the five study reaches. and 7,733 of these individuals were recaptured one or more trips after they were released. A total of 1,477 individuals (19%) were recaptured more than once (i.e., on two or more trips after release). In total, 9,542 across-trip recaptures with length and weight measurements on release and recapture events were obtained. Very few tagged fish were recaptured in reaches other than the ones they were released in, and these fish were excluded from the analysis. Provided are tabulated data for fish capture (158,324 records), size-stratified abundance estimates by reach and sampling trip, and the upper and lower confidence intervals for total abundance. We evaluated the effects of discharge, water temperature, solar insolation, turbidity-driven reactive distance (feeding efficiency), intraspecific competition, and prey availability on growth rates of rainbow trout. These six covariates were selected based on hypotheses of how they affect the rate of prey delivery, metabolic and foraging costs, foraging efficiency, and prey availability. Covariates are compiled as tabulated mean values for each reach and sampling trip and corresponding data sources.

Field estimates of the abundance of two trout species (bull trout and westslope cutthroat trout) in Montana and rainbow trout in Washington and British Columbia were collected in concert with environmental DNA samples (eDNA) to evaluate if eDNA copy numbers correlated with abundance of trout. In addition, stream habitat data including channel units (pools, riffles), substrate, large woody debris, among others, were collected at sites.

Field estimates of the abundance of two trout species (bull trout and westslope cutthroat trout) in Montana and rainbow trout in Washington and British Columbia were collected in concert with environmental DNA samples (eDNA) to evaluate if eDNA copy numbers correlated with abundance of trout. In addition, stream habitat data including channel units (pools, riffles), substrate, large woody debris, among others, were collected at sites.

These data were compiled to describe population reproductive structure of rainbow trout in the Colorado River downstream of Glen Canyon Dam, Arizona. Objective(s) of our study were to describe the population on reproductive structure of the rainbow trout population in Glen Canyon on the Colorado River and evaluate the accuracy of nonlethal methods (manual expression and ultrasonography) for assigning sex and reproductive phase. These data represent samples collected in 3 sampling trips fall in October to November 2018, February 2019, and April 2019. These data were collected in Glen Canyon, from Glen Canyon Dam to Lees Ferry on the Colorado River. Specifically, we sampled three reaches within Glen Canyon to represent the upper (A: 2.0 - 4.8 km downstream of the dam), middle (B: 8.7 – 11.2 km), and lower (C: 18 – 20.7 km) sections of the tailwater, representing a little more than 1/3rd of the 25-km length of Glen Canyon. These data were collected by the study authors (Crossman, Webb, and Korman) as part of ongoing USGS Trout Recruitment and Growth Dynamics sampling trips in 2018 and 2019. Rainbow trout were sampled from each sampling site on each trip and approximately equal numbers taken from each of four size classes (100-199, 200-299, 300-399, 400-499 mm fork length). Fish were measured for length and weighed and a piece of gonad tissue was preserved for histological assignment in the lab. These data can be used to describe population reproductive structure of rainbow trout, understand less invasive methods for assigning sex, and improve our understanding of how somatic growth and energetic status influence population reproductive structure, reproductive seasonality, and later recruitments.

Field estimates of the abundance of rainbow trout in Washington and British Columbia were collected in concert with environmental DNA samples (eDNA) to evaluate if eDNA copy numbers correlated with abundance of trout. In addition, stream habitat data including channel units (pools, riffles), substrate, large woody debris, among others, were collected at sites.

Field estimates of the abundance of rainbow trout in Washington and British Columbia were collected in concert with environmental DNA samples (eDNA) to evaluate if eDNA copy numbers correlated with abundance of trout. In addition, stream habitat data including channel units (pools, riffles), substrate, large woody debris, among others, were collected at sites.

The dataset is composed of two data tables containing information from electrofishing surveys conducted in the Catskill and Adirondack regions. The first data table contains fish collection information and the second data table contains information on the sampled reaches. First posted September 25, 2018, ver. 1.0 Revised July 2019, ver. 2.0 Revised November 2020, ver. 3.0 Revised March 2022, ver. 4.0 Revised September 2022, ver. 5.0 Revised February 2023, ver. 6.0 Revised December 2023, ver. 7.0 Version 7.0: This version of the dataset has the same structure (two data tables containing the same column headings) as Versions 6.0, 5.0, 4.0, 3.0, 2.0, and 1.0 but includes the addition of data from electrofishing surveys conducted in 2023 at 8 sites in the Catskill Mountain region and 2 sites in the Adirondack Mountain region. All data in Version 6.0 have been retained in Version 7.0 and are unchanged. Version 6.0: This version of the dataset has the same structure (two data tables containing the same column headings) as Versions 5.0, 4.0, 3.0, 2.0, and 1.0 but includes the addition of data from electrofishing surveys conducted in 2022 at 8 sites in the Catskill Mountain region and 1 site in the Adirondack Mountain region. All data in Version 5.0 have been retained in Version 6.0 and are unchanged. Version 5.0: This version of the dataset has the same structure (two data tables containing the same column headings) as Versions 4.0, 3.0, 2.0, and 1.0 but includes the addition of data from electrofishing surveys conducted in 2021 at 11 sites in the Catskill Mountain region. All data in Version 4.0 have been retained in Version 5.0 and are unchanged with one exception: the USGS Station Number associated with the site ID ‘ElkBRest’ has been changed from 0136219205 to 420312074273701. Version 5.0 data are available upon request. Version 4.0: This version of the dataset has the same structure (two data tables containing the same column headings) as Versions 3.0, 2.0, and 1.0 but includes the addition of data from electrofishing surveys conducted in 2020 at 40 sites in the Adirondack Mountain region and 11 sites in the Catskill Mountain region. All data in Version 3.0 have been retained in Version 4.0 and are unchanged with two exceptions: 1) the species identification of 4 fish captured in Browns Creek on 7/29/14 have been changed from Northern Pearl Dace (Margariscus nachtriebi) to Allegheny Pearl Dace (Margariscus margarita) as a result of subsequent expert assessment of archived specimens, and 2) the USGS Station Number associated with the site ID ‘Windfall’ has been changed from 434813074505701 to 04253660. Version 4.0 data are available upon request. Version 3.0: This version of the dataset has the same structure (two data tables containing the same column headings) as Versions 2.0 and 1.0 but includes the addition of data from electrofishing surveys conducted in the upper Neversink River and upper Rondout Creek and their tributaries in the Catskill region during the period 1988-2019. All data in Version 2.0 have been retained in Version 3.0 and are unchanged with two exceptions: 1) the “Year” column in both data tables has been replaced with a “Date” column providing the exact date a survey was conducted, and 2) the USGS Station Number associated with the site ID ‘Slide’ on the West Branch Neversink River has been changed from 420034074253201 to 0143402120. Version 3.0 data are available upon request. Version 2.0: This version of the dataset has the same structure (two data tables containing the same column headings) as Version 1.0 but includes the addition of data from electrofishing surveys conducted on the Esopus Creek and its tributaries in the Catskill region during the period 2009-2018. All data in Version 1.0 have been retained and are unchanged with the exception of a correction to the USGS Station Number associated with Wheeler Creek. Version 2.0 data are available upon request. Version 1.0: This version of the dataset