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Macroinvertebrates from Rivers in Northwest Alaska, 2015-2019 This dataset contains taxonomic information, counts, and lengths of macroinvertebrates collected from rivers in northwest Alaska using drift and kick nets during summer and fall 2015-2019. Version History: First release: February 2024 Revised: August 2024 (ver. 1.1) Categories: Data, Data Release - Revised; Tags: Actinopterygii, Age composition, Alaska, Animals/Invertebrates, Animals/Invertebrates, All tags... Aquatic Biology, Aquatic Invertebrates, Aquatic ecosystems, Arachnida, Arctic, Arthropods, Arthropods, Biota, Bivalvia, Clitellata, Ecology, Entognatha, Environment, Freshwater ecosystems, Gastropoda, InlandWaters, Insecta, Macroinvertebrates, Nemata, Turbellaria, USGS Science Data Catalog (SDC), Water Quality, Fewer tags Data from Black Brant (Branta bernicla nigricans) Overwintering in Three Lagoons Along the Baja California Peninsula, Mexico This data package includes two child items with data from Pacific Black Brant (Branta bernicla nigricans) during winter and migration periods. Child Item One: "Body mass, Morphological Measurements, Flock Counts, and Age-Ratios from Black Brant Overwintering in Three Lagoons Along the Baja California Peninsula, Mexico". The data include: (1) body mass and morphological measurements from sport hunter harvested brant, and (2) census counts of brant in Bahia de San Quintin, (3) counts for flock age ratio determination, and (4) behavior. Child Item Two: "Black Brant (Branta bernicla nigricans) Radio Detection and Migration Timing Alaska to Mexico". Data from brant tagged with VHF radio transmitters in July 1999 on... Categories: Data, Data Release - Revised; Tags: Alaska, Animal populations, Animals/Vertebrates, Bahia San Quintín, Baja California, All tags... Baja California Sur, Biota, Birds, Black Brant, Branta bernicla nigricans, Brent Goose, Coastal ecosystems, Ecological dynamics, Environment, Izembek National Wildlife Refuge, Laguna Ojo de Liebre, Laguna San Ignacio, Mexico, Migratory birds, Population dynamics, Species life history, Species/population interactions, USGS Science Data Catalog (SDC), Waterfowl, Wildlife, Wildlife Biology, Yukon Delta, Yukon Delta National Wildlife Refuge, Yukon Kuskokwim Delta, Fewer tags Gulf Watch Alaska Nearshore Component: Sea Otter Aerial Survey Data Katmai National Park and Preserve, 2008-2018 These data are part of the Gulf Watch Alaska (GWA) long term monitoring program, nearshore monitoring component. Specifically, these data describe sea otter (Enhydra lutris) aerial survey observations from the waters around Katmai National Park and Preserve from surveys conducted in 2008, 2012, 2015, and 2018. Sea otters are a keystone predator, well known for structuring the nearshore marine ecosystem through their consumption of invertebrate prey. The dataset consists of 3 comma-delimited files (CSV) exported from Microsoft Excel. The data consists of (1) Strip transect counts, (2) Intensive Search Unit (ISU) counts, and (3) Transect coordinates. For each aerial survey, a pilot flew an airplane at an altitude... Categories: Data, Data Release - Revised; Tags: Abundance, Aerial survey, Alaska, Animals/Vertebrates, Aquatic Biology, All tags... Aquatic ecosystems, Benthic habitat, Biota, Coastal habitat, Distribution, Ecology, Ecology, Ecosystem monitoring, Enhydra lutris, Environment, Gulf of Alaska, Intertidal environments, Katmai National Park and Preserve, Marine environment monitoring, Marine mammals, Otters, Population dynamics, Sea otters, USGS Science Data Catalog (SDC), Wildlife Biology, Fewer tags Child Item 04: Forage Fish Aerial Validation Data from Prince William Sound, Alaska This is a child item of the USGS Data Release: https://doi.org/10.5066/F74J0C9Z One table with data used to validate aerial fish surveys in Prince William Sound, Alaska. Data includes: date, location, latitude, longitude, aerial ID, validation ID, total length and validation method. Various catch methods were used to obtain fish samples for aerial validations, including: cast net, go pro, hydroacoustics, jig, dip net, gill net, purse seine, photo and visual identification. Version History: First release: April 2017 Revised: February 2021 (ver. 2.0) Revised: March 2023 (ver. 3.0) Revised: September 2024 (ver. 4.0) Categories: Data, Data Release - Revised; Tags: Alaska, Animals/Vertebrates, Aquatic Biology, Biota, Coastal ecosystems, All tags... Ecology, Environment, Fish, Fisheries, Food fishes, Forage fish, Gulf of Alaska, Marine ecosystems, Marine fishery resources, Oceans, Pelagic habitat, Prince William Sound, USGS Science Data Catalog (SDC), Wildlife Biology, Fewer tags Detection of Seagrass Pathogens Using Environmental DNA (eDNA), North Pacific, 2016-present This data set is comprised of one table with sampling information and NCBI BioProject accession numbers for sequence information of this amplicon-based study targeting Labyrinthula, Phytophthora, and Halophytophthora of known pathogenic and non-pathogenic [to eelgrass (Zostera marina)] strains from eDNA samples. eDNA samples included water, sediment, and eelgrass from Notsuke Wan (Cove) Japan, Safety Sound, Izembek Lagoon, Port Moller, Chignik Lagoon, and Frederick Sound, Alaska and cloacal swabs from waterfowl hunted near Cold Bay Alaska. Replicate samples and multiple sampling dates of the same location were included. Highly conserved primers which could differentiate species of interest were developed for four... Categories: Data, Data Release - Revised; Tags: Alaska, Animals/Vertebrates, Aquatic Biology, Aquatic ecosystems, Biological informatics, All tags... Biota, Birds, DNA Primers, DNA, Mitochondrial, Databases, Nucleic acid, Decline (Plant disease), Disease detection, Disease spread, Disease vectors, Ducks/Geese/Swans, Ecological processes, Ecosystem, Ecosystem diversity, Environment, Environmental DNA, Environmental DNA, Feasibility studies, Field sampling, Genetics, Halophytophthora, Hokkaido, Izembek National Wildlife Refuge, Japan, Labyrinthula sp., Labyrinthula zosterae, Marine biology, Marine environment monitoring, Mitochondrial DNA, Ocean circulation, Oceans and Seas, Phytophthora gemini, Plants, Species/Population Interactions, USGS Science Data Catalog (SDC), Zostera marina, eDNA, Fewer tags Intertidal and Subtidal Sea Otter Prey Sampling in Mixed Sediment Habitat in Glacier Bay National Park and Preserve, Alaska, 1998 to 2011 This dataset provides clam species abundance and size data from intertidal and subtidal mixed sediment habitats in Glacier Bay National Park and Preserve (GBNPP). Data are provided for all observed clams, horse mussels, or urchins 14 mm or larger. Sampling involved excavating 25 cm of substrate from quadrats (approximately 0.25 sq meter) along transects at random and selected sites, 10 quadrats at the 0 Mean Lower Low Water (MLLW) tide level for intertidal sampling and 20 quadrats at approximately 9 m depth for subtidal sampling. Site and taxonomic information are provided. Abundance and size data are provided in two tables with different data configurations: (1) a compact version with data for those species observed... Categories: Data, Data Release - Revised; Tags: Alaska, Animal and plant census, Aquatic Biology, Aquatic biology, Benthic habitat, All tags... Benthos, Biota, Bivalves, Clam, Coastal ecosystems, Ecology, Environment, Glacier Bay National Park and Preserve, Macroinvertebrates, Marine ecosystems, Mollusks, Mollusks, Sea urchin, Trophic relationships, USGS Science Data Catalog (SDC), Wildlife, Wildlife Biology, Fewer tags Computed Streamflow Using Satellite Data for Selected Rivers in Alaska This dataset provides computed remotely-sensed streamflows (RSQ) at river reaches of selected rivers in Alaska. We used the relation between water-surface elevation data derived from satellite altimetry and dynamic surface water extent data derived from LANDSAT and Sentinel imagery data with the Modified Optimized Manning Method Algorithm (MOMMA) to compute remotely sensed streamflows. Data are organized in ZIP packages named for each river reach. Reach-specific details are provided in a README file included in each river reach ZIP package. Depending on the input data available for specific reaches, we used different workflows to estimate river reach width and process the data from river reaches. Each workflow... Categories: Data, Data Release - Revised; Tags: Alaska, Altimetry measurement, Canning River, Colville River, Copper River, All tags... Elevation, Holitna River, Hydrology, InlandWaters, Innoko River, Kantishna River, Knik River, Koyukuk River, Kuskokwim River, Multispectral imaging, Nushagak River, Porcupine River, Remote Sensing, Remote sensing, Streamflow, Susitna River, Tanana River, USGS Science Data Catalog (SDC), Water Resources, Yukon River, Fewer tags Black Brant (Branta bernicla nigricans) Radio Detection and Migration Timing Alaska to Mexico This is a child item of the USGS Data Release: https://doi.org/10.5066/F7T43R88 This data package provides data from Pacific Black Brant (Branta bernicla nigricans) tagged with VHF radio transmitters in July 1999 on the Yukon Kuskokwim Delta, Alaska and detected in the following two years during their annual migration. Data include: 1) one table with attributes of the tagged brant, 2) one table with estimated dates of migration events, and 3) seven tables of detection data from radio tracking scans at coastal sites between Alaska and Mexico. Version History: First release: April 2023 Revised: February 2024 (ver. 2.0) Categories: Data, Data Release - Revised; Tags: Alaska, Animal populations, Animals/Vertebrates, Bahia San Quintín, Baja California, All tags... Baja California Sur, Biota, Birds, Black Brant, Branta bernicla nigricans, Brent Goose, Coastal ecosystems, Ecological dynamics, Environment, Izembek National Wildlife Refuge, Laguna Ojo de Liebre, Laguna San Ignacio, Mexico, Migratory birds, Population dynamics, Species life history, Species/population interactions, USGS Science Data Catalog (SDC), Waterfowl, Wildlife, Wildlife Biology, Yukon Delta, Yukon Delta National Wildlife Refuge, Yukon Kuskokwim Delta, Fewer tags Greater White-Fronted Goose Genetic Data, Circumpolar, 1988-2009 This data set describes nuclear microsatellite genotypes derived from eight autosomal loci (BCA6, BCA9, BCA11, BCA5, CRG, OXY13, TSP1.20.09 and TSP1.20.46) and a 366 base pair portion of the mitochondrial control region. A total of 665 Greater White-fronted Geese were examined by genotyping and 518 by sequencing with samples coming from its circumpolar range representing multiple flyways (Midcontinent, Pacific, Greenland, Palearctic). The sex of most samples was determined in the field by morphology or cloacal examination. Version History: First release: June 2018 Revised: July 2018 (ver. 2.0) Categories: Data, Data Release - Revised; Tags: Alaska, Alleles, Anadyr, Anderson River, Animals/vertebrates, All tags... Anser albifrons, Biota, Birds, Bristol Bay, Brooks Range, Colville River, Cook Inlet, DNA, Ducks/Geese/Swans, Environment, Gene Flow, Genetic Markers, Genetic Variance, Genetics, Genetics, Genotype, Greater White-Fronted Goose, Greenland, Innoko National Wildlife Refuge, Ireland, Kanuti National Wildife Refuge, Kava, Kent Peninsula, Kolyma, Koyukuk National Wildlife Refuge, Kuparuk River, Kuskokwim River, Lena, MacKenzie River, Microsatellite Repeats, Molecular biology, North Slope, Northwest Territories, Nunavut, Old Crow Flats, Point Lay, Polymerase chain reaction, Population differentiation, Population genetics, Queen Maud Gulf, Rasmussen Basin, Selawik National Wildlife Refuge, Speciation (biological), Taimyr, Terrestrial Ecosystems, Terrestrial ecosystems, USGS Science Data Catalog (SDC), Vaygach, Victoria Island, Wildlife, Wildlife Biology, Yana, Yukon, Yukon River, Yukon–Kuskokwim Delta, Fewer tags Intertidal Soft-Sediment Bivalves from Prince William Sound, Kachemak Bay, Katmai National Park and Preserve, and Kenai Fjords National Park These data are part of the Gulf Watch Alaska (GWA) long-term monitoring program and describe bivalve count and size sampling and observations conducted at intertidal soft-sediment sampling sites in the northern Gulf of Alaska. This dataset consists of five comma separated files (.csv): 1) bivalve taxonomy table, 2) bivalve sampling site table, 3) bivalve count table, 4) bivalve size table, and 5) list of Gulf Watch Alaska principal investigators and collaborators. Version History: First release: November 2018 Revised: September 2022 (ver. 2.0) Revised: October 2023 (ver. 3.0) Categories: Data, Data Release - Revised; Tags: Alaska Peninsula, Animals/Invertebrates, Aquatic Biology, Aquatic biology, Aquatic ecosystems, All tags... Aquatic ecosystems, Benthic ecosystems, Benthic habitat, Biota, Bivalve, Coastal ecosystems, Coastal habitat, Ecology, Ecology, Environment, Field inventory and monitoring, Field sampling, Gulf of Alaska, Kachemak Bay, Katmai National Park and Preserve, Katmai National Park and Preserve, Kenai Fjords National Park, Kenai Fjords National Park, Macroinvertebrates, Marine ecosystems, Marine environment monitoring, Marine environments, Mollusks, Prince William Sound, Size distribution, Spatial distribution, USGS Science Data Catalog (SDC), Wildlife, Wildlife Biology, Fewer tags Genomic Data from Ptarmigan and Grouse, Alaska This data set provides sample data and NCBI accession information for genomic sequencing of ptarmigan and grouse from Alaska. Version History: First release: July 2020 Revised: December 2021 (ver. 2.0) Categories: Data, Data Release - Revised; Tags: Alaska, Animals/Vertebrates, Biota, Birds, Bonasa umbellus, All tags... DNA sequencing, Dendragapus fuliginosus, Environment, Falcipennis canadensis, Fowl, Galliformes, Genetic diversity, Genetics, Genomics, Herbivores, Lagopus lagopus, Lagopus leucura, Lagopus muta, Population Genetics, Rock ptarmigan, Ruffed grouse, Sharp-tailed grouse, Sooty grouse, Spruce grouse, Terrestrial ecosystems, Transcriptome, Tundra ecosystems, Tympanuchus phasianellus, USGS Science Data Catalog (SDC), Upland game birds, White-tailed ptarmigan, Wildlife, Wildlife Biology, Willow ptarmigan, ddrad, double digestion restriction associated DNA, exon capture, whole genome, whole methylome, whole mitogenome, whole transcriptome, Fewer tags Gulf Watch Alaska - Pelagic Ecosystems Forage Fish Component - Data from Prince William Sound: Distribution, Abundance, and Morphology of Fish, Zooplankton, and Predators and Oceanographic Conditions This data package includes 10 child items with data about the distribution, abundance, and morphology of forage fish, zooplankton, and predators, and oceanographic conditions during summer surveys in Prince William Sound, Alaska. Child Item 1: "Forage Fish Catch Data from Prince William Sound, Alaska". Fish catch data from summer surveys. Child Item 2: "Forage Fish Morphology Data from Prince William Sound, Alaska". Fish morphology data from summer surveys. Child Item 3: "Forage Fish Size, Age, and Energy Density Data from Prince William Sound, Alaska". Age, length, weight, dry mass energy density, and dry mass of forage fish captured in July. Child Item 4: "Forage Fish Aerial Validation Data from Prince William... Categories: Data, Data Release - Revised; Tags: Acoustic backscatter, Age composition, Alaska, Animals/Invertebrates, Animals/Vertebrates, All tags... Aquatic Biology, Aquatic birds, Aquatic mammals, Bioenergetics, Biomass, Biota, Calorimetry, Capelin, Coastal ecosystems, Conductivity, Ecology, Environment, Euphausiids, Fish, Fisheries, Fishery technology, Food fishes, Food web, Forage fish, Gulf of Alaska, Hydroacoustics, Inorganic Nutrients, Macrozooplankton, Marine ecosystems, Marine fishery resources, Marine mammals, Oceans, Pacific Sand Lance, Pelagic habitat, Photosynthetically active radiation, Plankton, Prince William Sound, Salinity, Sandlance, Sea ducks, Seabirds, Temperature, Turbidity, USGS Science Data Catalog (SDC), Wildlife Biology, Zooplankton, Fewer tags Child Item 09: Nutrient Depth Profile Data from Prince William Sound, Alaska This is a child item of the USGS Data Release: https://doi.org/10.5066/F74J0C9Z One table with the concentrations of inorganic nutrients (NO2, NO3, PO4, and SiOH4) in water samples collected during summer from multiple depths at sampling stations throughout Prince William Sound, Alaska. Version History: First release: April 2017 Revised: February 2021 (ver. 2.0) Revised: March 2023 (ver. 3.0) Revised: September 2024 (ver. 4.0) Categories: Data, Data Release - Revised; Tags: Alaska, Aquatic Biology, Biota, Coastal ecosystems, Ecology, All tags... Environment, Gulf of Alaska, Inorganic Nutrients, Marine ecosystems, Marine fishery resources, Oceans, Pelagic habitat, Prince William Sound, USGS Science Data Catalog (SDC), Wildlife Biology, Fewer tags Body mass, Morphological Measurements, Flock Counts, and Age-Ratios from Black Brant Overwintering in Three Lagoons Along the Baja California Peninsula, Mexico This is a child item of the USGS Data Release: https://doi.org/10.5066/F7T43R88 This data package includes four tables of data from Pacific Black Brant (Branta bernicla nigricans) wintering along the Baja California Peninsula and Sonoran coasts of Mexico. The data include: (1) body mass and morphological measurements from sport hunter harvested brant, and (2) census counts of brant in Bahia de San Quintin, (3) counts for flock age ratio determination, and (4) behavior. Version History: First release: April 2023 Revised: February 2024 (ver. 2.0) Categories: Data, Data Release - Revised; Tags: Animal populations, Animals/Vertebrates, Bahia San Quintín, Baja California, Baja California Sur, All tags... Biota, Birds, Black Brant, Branta bernicla nigricans, Brent Goose, Coastal ecosystems, Ecological dynamics, Environment, Laguna Ojo de Liebre, Laguna San Ignacio, Mexico, Migratory birds, Population dynamics, Species life history, Species/population interactions, USGS Science Data Catalog (SDC), Waterfowl, Wildlife, Wildlife Biology, Fewer tags Intertidal Mussel (Mytilus) Data from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park These data are part of the Gulf Watch Alaska (GWA) long-term monitoring program and describe mussel sampling and observations conducted in the northern Gulf of Alaska. This dataset consists of six comma separated files (.csv): 1) mussel sampling site layout information, 2) mussel counts for mussels greater than 20 millimeters in a quadrat, 3) mussel size measurements for mussels greater than 20 millimeters in a quadrat, 4) mussel counts for all mussels collected from core samples, 5) mussel size frequencies for all mussels collected from core samples, and 6) list of Gulf Watch Alaska principal investigators and collaborators. This dataset includes previously released data and supersedes the USGS data release (https://doi.org/10.5066/F7WS8RD4).... Categories: Data, Data Release - Revised; Tags: Alaska, Animals/Invertebrates, Aquatic Biology, Aquatic biology, Aquatic ecosystems, All tags... Aquatic ecosystems, Benthic ecosystems, Benthic habitat, Bioindicator, Biospheric indicators, Biota, Coastal ecosystems, Coastal habitat, Coastal processes, Ecology, Ecology, Environment, Field inventory and monitoring, Field sampling, Gulf of Alaska, Katmai National Park and Preserve, Kenai Fjords National Park, Macroinvertebrates, Marine ecosystems, Marine environment monitoring, Marine environments, Mollusks, Mollusks, Mussels, Pacific Blue Mussel, Prince William Sound, Size distribution, Spatial distribution, USGS Science Data Catalog (SDC), Wildlife, Wildlife Biology, Fewer tags Hawaiian Coot (Fulica alai) and Hawaiian Gallinule (Gallinula galeata sandvicensis) Microsatellite and Mitochondrial DNA Data, 2014-2016, Oahu, Kauai, and Molokai, Hawaii This data set describes nuclear microsatellite genotypes derived from twenty-one autosomal loci (Fal02, Fal04, Fal07, Fal08, Fal10, Fal12, Fal14-1, Fal16, Fal 17, Fal19, Gch03, Gch06, Gch07, Gch12, Gch13, Gch14, Gch17, Gch19, Pho110, KiRa9-1, and KiRa10) and nucleotide sequence data derived from two mitochondrial DNA loci (control region and NADH dehydrogenase 2). Samples were collected on Oahu, Kauai, Molokai, Hawaii, United States of America. Samples used in the study originated from blood or feather samples collected in the field from live trapped birds or from tissue taken from dead birds or museum specimens according to each institution's load policies and procedures. We compared historical (samples collected... Categories: Data, Data Release - Revised; Tags: Alleles, Animals/Vertebrates, Biota, Birds, Common Gallinule, All tags... Cranes and Allies, DNA sequencing, DNA, Mitochondrial, Environment, Evolution, Genetic diversity, Genetic diversity, Genetic markers, Genetic variance, Genetics, Genotype, Hawaii, Hawaiian Common Gallinule, Hawaiian Coot, Hawaiian Gallinule, Kauai, Microsatellite repeats, Molokai, Oahu, Polymerase chain reaction, Population genetic, Terrestrial ecosystems, USGS Science Data Catalog (SDC), Wildlife, Wildlife Biology, Fewer tags Child Item 02: Forage Fish Morphology Data from Prince William Sound, Alaska This is a child item of the USGS Data Release: https://doi.org/10.5066/F74J0C9Z One table with fish morphology measurements from a sample of each fish species caught at each sampling station during summer surveys in Prince William Sound, Alaska. The data include: date, time, latitude, longitude, fishing method, fish common name, total length, fork length, weight, and whether or not that fish was saved. Various catch methods were used to obtain fish samples for aerial and hydroacoustic validations, including: modified herring trawl, purse seine, beach seine, gillnet, cast net, dip net, and jig. Version History: First release: April 2017 Revised: February 2021 (ver. 2.0) Revised: March 2023 (ver. 3.0) Revised: September... Categories: Data, Data Release - Revised; Tags: Alaska, Animals/Vertebrates, Aquatic Biology, Biota, Capelin, All tags... Coastal ecosystems, Ecology, Environment, Fish, Fisheries, Food fishes, Forage fish, Gulf of Alaska, Marine ecosystems, Marine fishery resources, Oceans, Pacific Sand Lance, Pelagic habitat, Prince William Sound, Sandlance, USGS Science Data Catalog (SDC), Wildlife Biology, Zooplankton, Fewer tags Child Item 01: Forage Fish Catch Data from Prince William Sound, Alaska This is a child item of the USGS Data Release: https://doi.org/10.5066/F74J0C9Z One table with fish catch data from summer surveys in Prince William Sound, Alaska. The data include: date, time, latitude, longitude, fish common name, and fish count. Various catch methods were used to obtain fish samples for aerial and hydroacoustic validations, including: modified herring trawl, purse seine, beach seine, gillnet, cast net, dip net, and jig. Version History: First release: April 2017 Revised: February 2021 (ver. 2.0) Revised: March 2023 (ver. 3.0) Revised: September 2024 (ver. 4.0) Categories: Data, Data Release - Revised; Tags: Alaska, Animals/Vertebrates, Aquatic Biology, Biota, Capelin, All tags... Coastal ecosystems, Ecology, Environment, Fish, Fisheries, Food fishes, Forage fish, Gulf of Alaska, Marine ecosystems, Marine fishery resources, Oceans, Pacific Sand Lance, Pelagic habitat, Prince William Sound, Sandlance, USGS Science Data Catalog (SDC), Wildlife Biology, Zooplankton, Fewer tags Child Item 06: Zooplankton Biomass Data from Prince William Sound, Alaska This is a child item of the USGS Data Release: https://doi.org/10.5066/F74J0C9Z One table with zooplankton biomass data from samples collected in the upper 50 m of the water column during summer surveys in Prince William Sound, Alaska. Data include: date, time, latitude, longitude, depth, species identification, and biomass. Version History: First release: April 2017 Revised: February 2021 (ver. 2.0) Revised: March 2023 (ver. 3.0) Revised: September 2024 (ver. 4.0) Categories: Data, Data Release - Revised; Tags: Alaska, Animals/Invertebrates, Aquatic Biology, Biomass, Biota, All tags... Coastal ecosystems, Ecology, Environment, Gulf of Alaska, Marine ecosystems, Marine fishery resources, Oceans, Pelagic habitat, Plankton, Prince William Sound, USGS Science Data Catalog (SDC), Wildlife Biology, Zooplankton, Fewer tags Sea Otter Spraint Data from Kachemak Bay, Katmai National Park and Preserve, Kenai Fjords National Park and Prince William Sound These data are part of the Gulf Watch Alaska (GWA) long-term monitoring program. This dataset consists of observations of sea otter (Enhydra lutris) fecal samples (spraint). Observers examined fresh spraint piles to identify major prey classes in the samples and to determine sea otter diets in the Gulf of Alaska region. Version History: First release: July 2022 Revised: March 2023 (ver. 2.0) Revised: November 2023 (ver. 3.0) Revised: August 2024 (ver. 4.0) Categories: Data, Data Release - Revised; Tags: Alaska, Animals/Vertebrates, Aquatic biology, Aquatic ecosystems, Benthic ecosystems, All tags... Benthic habitat, Biota, Coastal ecosystems, Coastal habitat, Ecology, Ecology, Environment, Field sampling, Foraging behavior, Gulf of Alaska, Intertidal environments, Kachemak Bay, Katmai National Park and Preserve, Kenai Fjords National Park, Marine ecosystems, Marine environment monitoring, Marine mammals, Otters, Prey consumption, Prince William Sound, USGS Science Data Catalog (SDC), Wildlife, Wildlife Biology, Fewer tags 1 2 »