This dataset contains length, weight, energy density, and isotope values of fish collected in northwest Alaskan rivers during summer and fall 2015-2019.

This dataset contains length, weight, energy density, and isotope values of fish collected in northwest Alaskan rivers during summer and fall 2015-2019.

Juvenile coho salmon seek slow velocity areas as rivers rise during storm events. Studies have shown significant increase in juvenile coho salmon growth and survival when they have access to slow water refuge in off-channel ponds during these storms. In addition, off channel features also provide habitat for several other animals including reptiles, amphibians and numerous bird species. In 2014, Humboldt Redwood Company (HRC) identified an abandoned overflow channel that had the potential to become off channel habitat in Lawrence Creek located within the Van Duzen River watershed and asked the National Marine Fisheries Service (NMFS) to partner on the project. NMFS conducted the physical surveys, created the design, and a small competitive internal grant from NOAA provided funding for part of the project construction. HRC worked on the permits, donated heavy equipment and operators as well as several large logs with root wads to build the instream structures.

This dataset is four tables with: 1) the body condition and egg counts of Sockeye Salmon captured at several sites along the Pilgrim River 2013-2016, 2) water temperature from 10 automated temperature dataloggers during the summers of 2013-2016, 3) results from an experiment to determine the effect of elevated water temperature on levels of Heat Shock Protein (HSP70) in captive juvenile Sockeye Salmon, and 4) the geographic coordinates of temperature dataloggers and fish capture sites.

This data set is four tables with: 1) the body condition and egg counts of Sockeye Salmon captured at several sites along the Pilgrim River 2013-2016, 2) water temperature from 10 automated temperature dataloggers during the summers of 2013-2016, 3) results from an experiment to determine the effect of elevated water temperature on levels of Heat Shock Protein (HSP70) in captive juvenile Sockeye Salmon and 4) the geographic coordinates of temperature dataloggers and fish capture sites.

This data release contains one table with gene transcription results from muscle samples collected from fish occupying freshwater in various Alaskan watersheds. Heat shock protein 70 (HSP70) results from fish included in this data release are published in a separate data release available at https://doi.org/10.5066/P13ZYKWR.

This dataset documents the gene transcription levels for a panel of 12 selected genes and the heat shock protein 70 (HSP70) protein abundance measured in the muscle tissue of individual wild Chinook salmon captured from locations within the U.S. portion of the Yukon River watershed. Chinook salmon were primarily captured in 2016 and 2017 from existing field efforts (n = 477). A small number of additional samples (n = 22) were collected in 2018 following an experimental temperature experiment conducted in Pilot Station, Alaska, USA. During this experiment individual fish were held for ~6 hours at either river ambient control water temperatures or a heated treatment temperature of 18 °C or 21 °C. This small experiment dataset was used to validate and refine the use of gene transcription and HSP70 protein levels as heat stress biomarkers for Yukon River Chinook salmon.

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 annual water temperature and the warmest and coldest month in each WY to the dataset. This permitted an evaluation of the relative importance of water temperature on trout population dynamics relative to other physical and biological predictors. Detailed methods and results are reported in the manuscript associated with this data publication.

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 annual water temperature and the warmest and coldest month in each WY to the dataset. This permitted an evaluation of the relative importance of water temperature on trout population dynamics relative to other physical and biological predictors. Detailed methods and results are reported in the manuscript associated with this data publication.

This dataset includes continuous data on water temperature, dissolved oxygen, conductivity, and photosynthetically active radiation (PAR) from low-order streams and main-stem rivers in Northwestern Alaska. Water temperatures were determined using a HOBO Water Temp Pro v2 (Onset Computer Corporation, Bourne, MA, USA) with ±0.2 °C accuracy. Dissolved oxygen was measured using HOBO U26 Dissolved Oxygen logger (Onset Computer Corporation, Bourne, MA, USA) with an accuracy of ± 0.2 mg/L up to 8 mg/L; ± 0.5 mg/L from 8 to 20 mg/L. Conductivity was measured with HOBO U24-001 freshwater conductivity data logger (Onset Computer Corporation, Bourne, MA, USA) with an accuracy of ± 3%. Photosynthetically active radiation was measured with a HOBO UA-002-64 Pendant Temperature/Light 64K Data Logger (Onset Computer Corporation, Bourne, MA, USA). Sensors were placed at several locations within each stream as well as in the main river below the tributary junction in order to assess stream thermal state. All sensor types were also placed in impoundments from beaver (Castor canadensis) dams on rivers and in small lakes.