Data

This data release contains optical measurements for surface water samples collected during synoptic raft trips during three different sampling events. Data collection was performed by the University of Colorado at Boulder, Colorado (CO), and the U.S. Geological Survey (USGS) in Lakewood, CO. The raft was steered in the center of the river thalweg, generally between Kremmling, Colorado...

Surface water samples were collected from two basins included in the Next Generation Water Observing System network. Six sites were within the Upper Colorado (UCOL) basin, of which three sites (Fraser River at Tabernash, 09027100; Colorado River at Windy Gap, 09034250; Colorado River near Cameo, 09095500) were equipped with Turner Designs C6P fluorometers for continuous fluorescence...

Assessing the distribution and abundance of both predator and prey (forage) fish species is a cornerstone of ecosystem-based fishery management and supports decision making that considers food-web interactions. In support of binational Great Lakes fishery management, the objectives of this survey were to: provide estimates of densities of key forage and predator species in the western...

This dataset is from a vessel comparison study between four motorized research vessels (RVs) and one uncrewed surface vessel (USV) including the Ohio Department of Natural Resources (ODNR) RV Almar and RV Grandon, the U.S. Geological Survey (USGS) RV Muskie, the Ontario Ministry of Natural Resources (OMNR) RV Erie Explorer and a wind propelled USV (SD-1080; Saildrone Inc.). Paired...

This data release provides both the input datasets and modeled output estiamtes generated from eight lake metabolism models, which quantify gross primary production (GPP), ecosystem respiration (ER), and net ecosystem production (NEP). Seven of the lakes were monitored by the National Ecological Observatory Network (NEON), and one by the U.S. Geological Survey (USGS Site No. 01670144)...

These data consist of prey fish density and biomass estimates throughout Lake Michigan during late summer-fall from 1973 to 2025 along with alewife (Alosa pseudoharengus) recent age estimates collected. Fish were collected using bottom or midwater trawls. In addition to fish data, some zebra and quagga mussel (Dreissena spp.) biomass estimates are included as well as recent native...

This data release includes Lake Ontario gillnet catch and biological data from individual fish from the Lake Ontario adult lake trout survey, from 1983 to 2025. Data from gillnets fished in Canadian waters are included from 1985 to 1995, 2008, and 2024. Details about the vessel and gear descriptions, sampling protocols, and fish processing protocols are provided in the associated...

This data release includes Lake Ontario fish data from the April or spring prey fish bottom trawl survey, conducted by multiple agencies from 1978 through 2025.This survey goal is to quantify the relative abundance and population dynamics of prey or forage fishes, and in particular Alewife (Alosa pseudoharengus), which inform fisheries managers that decide on Lake Ontario predator fish...

Fish are often used as bioindicators to test the state of their environment qualitatively or quantitatively. This data set contains details of lake sturgeon (captured in the Genesee and Oswegatchie Rivers for Bioindicator Project GL-00E00825-0, 2012-2013). This study focused on non-lethal comparison of chemicals in age matched release juvenile lake sturgeon in an Area of Concern...

In June 2017, Lake Sturgeon were observed spawning in Fall Creek, a tributary to Cayuga Lake, NY. The spawning site was just downstream of Ithaca Falls, the first impassible barrier. Data were collected to quantify the stream habitat use by the Lake Sturgeon. These were the first sturgeon observed spawning in a Cayuga Lake tributary recorded in the New York Department of Environmental...

This dataset includes fish community data collected during the annual nearshore and offshore surveys for Lake Superior from 1978-2025. The data includes: the number, weight, number per hectare, and kg per hectare of fish caught at each location from 1978-2025; annual age-1 numerical density estimates for select species in the nearshore region (1978-2025) and offshore region (2011-2025)...

This data release provides information on lake trout (Salvelinus namaycush) collected from 10 lakes located in Alaska's national parks. The data are in two tables: (1) capture information, (2) morphometric measurements and mercury (Hg) concentrations, and a folder of individual photographs of captured lake trout. Lake trout were collected between September of 2020 and August of 2023 from...