This is a tabular data set containing age, sex, and length measurements of Inconnu sampled from the Yukon River and tributaries in Alaska between 1990 and 2018.

This is a tabular data set containing age, sex, and length measurements of Inconnu sampled from the Yukon River and tributaries in Alaska between 1990 and 2018.

Tabular dataset containing age, sex, and length biometric data for all whitefish species detected and recorded at the Andreafsky weir for 2010-2013 and 2015. Data was compiled from in-season data sheets. Sex was identified visually and length was measured using a measuring board to the nearest 1/2 mm. Total weight in grams was taken for every sampled individual. if the specimen was identified as a female, egg weight in grams was recorded and relative egg weight as a percentage was calculated. NA refers to missing data.

Tabular dataset containing age, sex, and length biometric data for all whitefish species detected and recorded at the Andreafsky weir for 2010-2013 and 2015. Data was compiled from in-season data sheets. Sex was identified visually and length was measured using a measuring board to the nearest 1/2 mm. Total weight in grams was taken for every sampled individual. if the specimen was identified as a female, egg weight in grams was recorded and relative egg weight as a percentage was calculated. NA refers to missing data.

Tabular dataset containing age, sex, and length data for Chum, Chinook, and Sockeye salmon. Sex was determined externally using visual clues such as snout shape and size. Length was measured from fork to mid-eye with a measuring board to the closest 5 mm. Strata refers to the potion of the run the fish was sampled during. Strata data is based on the size of the population rather than date since the salmon run does not start on one specific date year by year. Scales were also taken and placed on a gum card for age assessment. One scale was taken for all sampled Chum salmon and three scales were taken for all sampled Chinook salmon.

Tabular dataset containing age, sex, and length data for Chum, Chinook, and Sockeye salmon. Sex was determined externally using visual clues such as snout shape and size. Length was measured from fork to mid-eye with a measuring board to the closest 5 mm. Strata refers to the potion of the run the fish was sampled during. Strata data is based on the size of the population rather than date since the salmon run does not start on one specific date year by year. Scales were also taken and placed on a gum card for age assessment. One scale was taken for all sampled Chum salmon and three scales were taken for all sampled Chinook salmon.

This collection of GIS layers was prepared for the report Alaska Arctic Marine Fish Ecology Catalog (U.S. Geological Survey Scientific Investigations Report 2016–5038). The layers display geographic distribution and sampling locations for Arctic marine fish species in the region of United States sectors of the Chukchi and Beaufort Seas. Certain diadromous species (for example, Pacific salmon, char, and whitefishes) are treated as marine fishes (McDowall, 1987) because much of their life cycle is in marine and brackish environments. This synthesis of information is meant to provide current information and understanding of this fauna and its relative vulnerability to changing Arctic conditions. There are 104 species in the collection - some species have both polygon and point data layers. The report (SIR 2016-5038) also describes for each species its names - species, common, and colloquial; ecological role; physical description/attributes; range (geographic); relative abundance; depth range; habitats and life history; behavior; populations or stocks, reproduction, food and feeding, biological interactions, resilience, traditional and cultural importance, commercial fisheries, potential effects of climate change, areas for future research, cited references, and bibliography. The published report has one map for each species showing the polygon and point data as well as land and relevant administrative boundaries. Although some of the species also have an inland water presence, this report was concerned only with their marine conditions; therefore, the land component (from the original sources) has been clipped and removed. The distribution areas may be greater in extent than that shown in the report map bounding box limits. Distributions of marine fishes are shown in adjacent Arctic seas where reliable data are available. The report can be accessed at: https://doi.org/10.3133/sir20165038 This metadata document describes the collection of species data layers. Each species layer file will have its own metadata with details specific to that layer.

The main contents of this data release are estimates of daily and annual abundances of federally-threatened natural-origin age-0 fall Chinook salmon (Oncorhynchus tshawytscha) passing Lower Granite Dam, Washington. Fish from this population are sampled as they pass Lower Granite Dam, but these sample data cannot be used directly to infer abundance because capture probability at Lower Granite Dam varies throughout the migration and because of the contemporaneous presence of unmarked hatchery-origin fish which are visually indistinguishable from natural-origin fish. Estimates of abundance were obtained by fitting a statistical mark-recapture model that integrated four related datasets: 1) the release/recapture data of passive integrated transponder juvenile salmon tagged as either part of a natural-origin fish survey or as part of hatchery monitoring efforts, 2) daily counts of fish sampled by the smolt monitoring program at Lower Granite Dam, 3) hatchery release data and 4) environmental and operational covariates of Lower Granite Dam. An integrated Bayesian mark-recapture model fit joint parameters for daily fish arrival and capture probabilities to these data to estimate the daily abundance of hatchery- and natural-origin fish. In addition to the main results, this data release contains the raw data used to the fit the models and related parameters such as daily capture probability estimates and daily abundances of hatchery-origin fish.

Tabular data pertaining to biometrics, histology, genetics, and information relating to location and date of capture of Chinook salmon caught in the Yukon River for Ichthyophonus project.

Tabular data set containing colony-level data for common murre breeding colonies monitored by USFWS and other agencies within the Eastern Bering Sea and Gulf of Alaska from 1995 to 2022.