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Filters Date Range Past year (1) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts U.S. Geological Survey - ScienceBase Brian C Weidel U.S. Geological Survey Ecosystems Theresa L Liedtke More... Tag Types Theme (5) Place (5) USGS Scientific Topic Keyword (4) Harvest Set (5) Tag Schemes None (2) Geographic Names Information System (GNIS) (1) USGS Thesaurus (3) none (2) USGS Biocomplexity Thesaurus (1) ISO 19115 Topic Category (4) Common geographic areas (1) More... View Results as: JSON ATOM CSV

Bigheaded carp ichthyoplankton qPCR screening tool: data This dataset includes information from ichthyoplankton sampling for silver carp and bighead carp collected from three main reaches in the Upper Mississippi River Basin, including the La Grange, Peoria, Starved Rock, and Marseilles reaches of the Illinois River, Pool 20 of Mississippi River, and the St. Croix River. Data include the number of bigheaded carp eggs and larvae identified using traditional manual sorting techniques, and genetic data derived from quantitative PCR (qPCR) and 4 bigheaded carp markers (SCTM4/5 and BHTM1/2) that were used to identify the amount of DNA in ichthyoplankton tow samples. These data provide information for natural resource agencies and managers who could use this qPCR screening... Categories: Data; Tags: Hypophthalmichthys, Illinois, Illinois River, USA, Iowa, Midwest Region, USA, All tags... Minnesota, Mississippi River, USA, St Croix River, USA, USGS Science Data Catalog (SDC), Wisconsin, bighead carp, biota, eggs, genetic screening, larvae, silver carp, Fewer tags Evaluating injury and mortality to larval lamprey collected out of sediment using a portable suction dredge Dataset describes the findings of a combination of field and laboratory tests to see if larval lamprey were injured or killed after they were collected from their burrows in sediment using a portable suction dredge. Categories: Data; Tags: Aquatic Biology, USGS Science Data Catalog (SDC), Wind River, Washington, dredge, lamprey, All tags... larvae, Fewer tags Swimming speeds of grass carp in response to turbulence In this experimental series we studied the swimming capabilities and response of grass carp (Ctenopharyngodon idella) larvae to flow turbulence in a laboratory flume. We compared three different experimental configurations, representing in-stream obstructions commonly found in natural streams (e.g. a gravel bump, a single vertical cylinder, and patches of submerged rigid vegetation). Grass carp larvae (post gas bladder emergence) were introduce to each experimental configuration and subjected to a variety of hydrodynamic forces of different magnitudes and scales. We varied the flow velocities and water depths and found threshold values of turbulent kinetic energy and Reynolds stresses that triggered an apparent... Categories: Data; Tags: Aquatic Biology, Fluid dynamics, Flume, Grass carp, Hydrology, All tags... Invasive species, Larvae, Swimming capability, Turbulence, USGS Science Data Catalog (SDC), University of Illinois at Urbana-Champaign, Ven Te Chow Hydrosystems Laboratory, biota, fish larvae, flow hydraulics, stream flow, water circulation, Fewer tags Biological and physical data for zebra mussel (Dreissena polymorpha) veligers collected from a coupled lake-stream ecosystem in north Texas, 2012-2014 Dispersal, establishment, and spread of aquatic invasive species such as the zebra mussel (Dreissena polymorpha) can be influenced by riverine velocities and volumetric flows in invaded lake-stream ecosystems. Zebra mussels, which have a planktonic larval form (veliger), disperse rapidly downstream from a source population. Concentrations, dispersal, and body conditions of zebra mussel veligers were studied under different volumetric flow, or discharge, conditions in a coupled lake-stream ecosystem in northern Texas, USA. Veliger densities in lotic environments were strongly related to population dynamics in upstream lentic source populations. A strong exponential decrease in veliger density was observed through... Categories: Data; Tags: Aquatic Biology, Aquatic ecosystem, Dallas, Dispersal, Ecology, All tags... Elm Fork Trinity River, Fort Worth, Geographical distribution, Lake Lewisville, Lake Texoma, Larvae, Oklahoma, Planktonic, Population dynamics, Ray Roberts Lake, Red River, River discharge, Texas, Trinity River, USGS Science Data Catalog (SDC), Water Quality, Water Resources, Wildlife Biology, Fewer tags Early life stage data for Lake Ontario fishes, 2018-2021 This data release includes early life stage data for Lake Ontario fishes including egg deposition, larval fish emergence from varied substrates and depths, and horizontal larval fish tow surveys conducted across various habitats. Tables include data from multiple field surveys and lab studies from 2018, 2019, and 2021. Larval tow observations from 2018 are from lake wide sampling in Lake Ontario while egg and larval emergence data are from embayments in U.S. waters of Lake Ontario in 2019 and 2021. Laboratory experiments on egg collection gear were conducted in 2019. Details about the vessel and gear descriptions, sampling protocols, and catch processing protocols are provided in the associated metadata. Categories: Data; Tags: Cisco, Ecology, Egg, Lake Ontario, Lake Whitefish, All tags... Larvae, Larval emergence, Limnology, New York, Ontario, USGS Science Data Catalog (SDC), biota, field sampling, fish, freshwater ecosystems, inlandWaters, population dynamics, spawning habitat, substrate, Fewer tags