This dataset contains environmental DNA (eDNA) concentrations and spawning adult abundances for sockeye salmon (Oncorhynchus nerka) in Hansen Creek, a small tributary in the Wood River watershed, southeast Alaska, USA. We took temporally- and spatially-replicated eDNA samples during the spawning period (mid-July through August), along with fish counts (live, naturally dead, and killed), dissolved oxygen (DO), discharge, and temperature data at each time of sampling. Samples were collected at each site before adults entered the stream, and then continued to be collected daily or every other day for the next three weeks.

A 2007 pilot study was initiated by the University of Alaska – Southeast in which baseline levels of contaminants, including persistent organic pollutants (POPs) and total mercury, were determined in whole bodies of juvenile coho salmon collected in streams in and near national park units in the Southeast Alaska Inventory and Monitoring Network. Although the concentrations of POPs determined in the juvenile coho were relatively low (< 10 ng/g, wet weight), the preliminary findings of this study indicate that, in the Glacier National Park region, salmon from streams with higher density of spawners had increased levels of certain banned chlorinated pesticides (i.e., alpha-chlordane, o,p’-DDT, p,p’-DDD) compared to salmon collected in other streams with lower salmon spawning density. A follow up study will be initiated in spring/summer 2015 to determine concentrations of POPs in resident salmonids, as well as benthic macroinvertebrates collected from five streams that have fish barriers near or adjacent to Glacier National Park. Comparisons in contaminant concentrations and patterns will be made for fish collected below and above the barrier in each stream to help determine if certain classes of POPs are being transported by the spawners. As part of this study, the NWFSC will analyze whole bodies/muscle of salmonids and benthic macroinvertebrate samples POPs using gas chromatography / mass spectrometry (GC/MS). Percent lipid content of samples (with adequate sample mass) will also be determined. These data will be included in a report to the NIH-sponsored IDeA Network of Biomedical Research Excellence. Determining levels of persistent organic pollutants in salmonids and macroinvertebrates.

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.

Environmental DNA quantitative results at the PCR technical replicate level for the target species Arctic Grayling and covariate information associated with these eDNA samples.

Environmental DNA quantitative results at the PCR technical replicate level for the target species Arctic Grayling and covariate information associated with these eDNA samples.

The dataset is the daily count of Sockeye Salmon (Oncorhynchus nerka) passing through a fish counting weir on the Pilgrim River from 2003 to 2014. Also, included in the data set is the daily temperature and river height measured at the weir (65.103071°, -164.824046°).The fish weir was operated during the summer (late June to mid-September) by the Norton Sound Economic Development Corporation.

The dataset is the daily count of Sockeye Salmon (Oncorhynchus nerka) passing through a fish counting weir on the Pilgrim River from 2003 to 2014. Also, included in the data set is the daily temperature and river height measured at the weir (65.103071°, -164.824046°).The fish weir was operated during the summer (late June to mid-September) by the Norton Sound Economic Development Corporation.

This archive information package contains fish presence and stream habitat data collected in southeast Alaska, between May 2017 and October 2020 to identify anadromous fish stream habitat. During this time the Alaska Department of Fish and Game Habitat Section staff completed 1,051 stream surveys in remote and urban areas, using backpack electrofisher, fish traps, clinometers, tape measures, and rangefinder/hypsometer. Data collected include fish species presence, notable fish habitat features, substrate characteristics, fish barriers, and other additional notes. These data are provided in both Excel spreadsheet and ESRI shapefile formats.

We used snorkel surveys in the Elwha River, conducted in consecutive years before (2007, 2008) and after (2018, 2019) dam removal to assess changes in fish distribution and density. In total, we counted 54,616 Chinook Salmon, Bull Trout, Steelhead, and trout (Rainbow Trout and Coastal Cutthroat Trout combined) in 22 common reaches spanning 65 river kilometers. The occupancy of juvenile Chinook Salmon, Coho Salmon, and trout was also assessed following dam removal.