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Filters Date Range Past year (2) Past month (1) Past week (1) Past day (0) Custom range... To   Search Types Map Service (1) OGC WFS Layer (1) OGC WMS Layer (1) OGC WMS Service (1) Contacts Vicki S Blazer U.S. Geological Survey - ScienceBase Heather L Walsh Eastern Ecological Science Center U.S. Geological Survey More... Categories Data (12) Data Release - Revised (1) Tag Schemes Geographic Names Information System (16) Geographic Names Information System (GNIS) (15) None (15) Common geographic areas (4) GNIS (1) Tags (with Type=Place ) pennsylvania (4) potomac river (4) maryland (3) pine creek (3) susquehanna river (3) west branch mahantango creek (3) antietam creek (2) More... View Results as: JSON ATOM CSV

Biological Indicators and Mercury Concentrations in Smallmouth Bass Biological indicators including morphometric (length, weight), age, sex and health indicators including organismal (health assessment index, condition factor), organ (hepatosomatic index, gonadosomatic index), cellular (intersex, parasite density, macrophage aggregate density), subcellular (plasma vitellogenin, estradiol, testosterone, 11-keto testosterone) and molecular (hepatic transcript abundance) were measured in smallmouth bass from tributaries in the Chesapeake Bay watershed. Total mercury was measured in these fish and correlations between mercury and biological indicators were assessed. Categories: Data; Tags: Antietam Creek, Aquatic Biology, Chillisqaque Creek, Environmental Health, Environmental Health, All tags... Monocacy River, North Branch Potomac River, Pine Creek, South Branch Potomac River, USGS Science Data Catalog (SDC), West Branch Mahantango Creek, Wildlife Disease, Wildlife Disease, biota, endocrine disruptor, fish health, immunity, mercury, reproductive health, Fewer tags Water Chemistry and Smallmouth Bass Biological Data From the Potomac River, Dargan, Maryland, 2013-2019 Decades of poor reproductive success and young-of-the-year recruitment, in addition to adult mortality, has led to a decline in the smallmouth bass (SMB) population in subwatersheds of the Potomac River. Previous studies have identified numerous biologic and environmental stressors associated with negative effects on SMB health. To better understand the impact of these stressors, the current study was conducted from 2013-2019 to identify temporal changes associated with SMB reproductive health. Grab surface water samples were collected and analyzed for over 300 organic contaminants, including pesticides, phytoestrogens, pharmaceuticals, hormones and total estrogenicity (E2Eq). Adult SMB were collected and sampled... Categories: Data; Tags: Aquatic Biology, Chesapeake Bay drainage, Environmental Health, Maryland, Potomac River, All tags... USGS Science Data Catalog (SDC), Wildlife Disease, biota, endocrine disruption, plasma vitellogenin, reproductive health, testicular oocytes, transcript abundance, Fewer tags Presence/Absence of Myxobolus inornatus, Aeromonas spp., and Flavobacterium spp. in Young-of-the-Year Smallmouth Bass with Fluorescence In Situ Hybridization Histopathological assessments of young-of-the-year smallmouth bass (YOY SMB) in the Susquehanna River drainage identified a high prevalence of the myxozoan Myxobolus inornatus. This myxozoan infects the connective tissue of the muscle below the skin but is sometimes observed in the esophagus and buccal cavity. In some instances, shallow infections cause breaks in the skin which could increase the chance of opportunistic bacterial infections. Several microbial pathogens including Flavobacterium columnare, Aeromonas spp. and largemouth bass virus (LMBV) have also been cultured from clinically diseased YOY. A multiplex fluorescence in situ hybridization (FISH) assay was developed to determine potential co-localization... Categories: Data; Tags: Aeromonas spp., Aquatic Biology, Coinfections, Flavobacterium spp., Fluorescence in situ hybridization, All tags... Myxobolus inornatus, Pennsylvania, Smallmouth bass, Susquehanna River Drainage, USGS Science Data Catalog (SDC), Wildlife Disease, Wildlife Disease, biota, Fewer tags Effects of early life stage exposure of largemouth bass to atrazine or a model estrogen (17α-ethinylestradiol) Largemouth base histological development and transcriptomic changes in gonad tissue after early life stage exposure to Atrazine (1-Chloro-3-ethylamino-5-isopropylamino-2,4,6-triazine) or the model estrogen 17α-ethinylestradiol. Tags: Aquatic Biology, Columbia Environmental Research Center, Environmental Health, RNAseq, USGS Science Data Catalog (SDC), All tags... aquatic toxicology, atrazine, biota, contaminants, endocrine disruption, ethinylestradiol, fish, gene expression, gonad, largemouth bass, Fewer tags Biological variables and liver and testes transcript abundance from smallmouth bass sampled in the Lake Erie drainage, Pennsylvania (2016) In 2016, smallmouth bass were collected from three sites in the Lake Erie drainage in Erie County, Pennsylvania and an out-of-basin site in the Allegheny River drainage in order to assess reproductive health and identify endocrine disruption responses. Pieces of liver and gonad were taken in Z-Fix and RNALater for histology and transcript abundance analysis. A landscape analysis was conducted for the immediate and upstream catchments with 2016 land cover data. Correlations between biological variables and transcripts were made in addition to differences between sites. The results showed that males had biological variables that correlated with transcripts associated with endocrine disruption and a high rate of testicular... Categories: Data; Tags: Aquatic Biology, Environmental Health, Environmental Health, Lake Erie, USGS Science Data Catalog (SDC), All tags... Wildlife Biology, Wildlife Biology, Wildlife Disease, Wildlife Disease, biomarkers, biota, plasma vitellogenin, reproductive health, testicular oocytes, transcript abundance, Fewer tags Organic contaminants, including hormones, pesticides, pharmaceuticals and other endocrine disrupting compounds, and estrogenicity data in select surface water samples as well as organic contaminants in bed sediment samples collected in Chesapeake Bay watershed in parts of Maryland, Pennsylvania, and West Virginia, 2012-2018 (ver. 2.0, August 2020) These data represent surface water and bed sediment samples analyzed for a variety of organic compounds. The samples were collected in streams and rivers in the Chesapeake Bay watershed from 2012-2018. Sites were located in Maryland, Pennsylvania, and West Virginia. Surface water samples were collected from 25 sites and analyzed for estrogenicity and an extensive suite of organic contaminants including hormones, pharmaceuticals, wastewater indicators, pesticides, phytoestrogens, and mycotoxins. Bed sediment samples were collected from 20 sites and analyzed for a suite of organic contaminants including hormones, wastewater indicators, pesticides, and organohalogens. Bed sediment was also analyzed for total organic... Categories: Data Release - Revised; Tags: Androgen, Caffeine/Nicotine, Chesapeake Bay, Endocrine Disruption, Estrogen, All tags... Flame Retardant, Fungicide, Herbicide, Hormones, Insecticide, Pesticide, Pharmaceutical, Plant/Animal Biochemical (PAB), Plasticizer, Polychlorinated Biphenyl, Polycyclic Aromatic Hydrocarbon, Potomac River, Progersterone, Progestin, Susquehanna River, USGS Science Data Catalog (SDC), Water Quality, Fewer tags Data Supporting: Draft Genome Sequence of a Novel Calicivirus from a Brown Bullhead (Ameiurus nebulosus) from Lake Memphremagog, VT We report a draft genome of a previously undescribed calicivirus from a single brown bullhead inhabiting Lake Memphremagog, Vermont/Quebec. The genome is 7413 nt in length and is most similar to the Atlantic salmon calicivirus (nucleotide identity; 64.7%). Tags: Ecology, Environmental Health, Environmental Health, Fishes, USGS Science Data Catalog (SDC), All tags... Vermont, Viruses, Wildlife Disease, Wildlife Disease, biota, health, Fewer tags Toxicity of potassium chloride, active compound in the molluscicide potash, on salmonid fishes and their forage base (Leetown Science Center, 2018). The data is supplemental to the 2018 USGS Open File Report, "An evaluation of the acute and chronic toxicity of potassium chloride, active compound in the molluscicide potash, on salmonid fishes and their forage base". This research was performed as a Science Support Partnership (SSP) study with USFWS in order to evaluate potential lethal and sublethal impacts of potassium chloride on salmonid fishes and selected invertebrate forage. Files in this data set describe blood chemistry parameters, plasma osmolality and cortisol, gill chloride cell abundance, and fish total body weight and total length for specimens from each of the two salmonid species tested (brook trout, Salvelinus fontinalis, and Chinook salmon, Oncorhynchus... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Environmental Health, Leetown Science Center, USGS Science Data Catalog (SDC), Wildlife Disease, aquatic biology, All tags... invasive species, pathology, Fewer tags Total Mercury Concentrations in Smallmouth Bass from Chesapeake Bay Tributaries, USA Dataset, 2013-2017 This dataset includes fish scientific name, fish common name, site identification codes, latitude, longitude, site name, sample identification codes, collection date, tissue type, percent moisture content in fish samples, and wet and dry total mercury concentrations in fish tissues. Categories: Data; Tags: Antietam Creek, Aquatic Biology, Chillisquaque Creek, Ecology, Environmental Health, All tags... Monocacy River, North Branch Potomac River, North Fork Shenandoah River, North Fork South Branch Potomac River, Pine Creek, South Branch Potomac River, USGS Science Data Catalog (SDC), Water Resources, West Branch Mahantango Creek, biota, chemical analysis, contamination and pollution, environment, inlandWaters, mercury levels, Fewer tags 2004-2010 Chesapeake Bay Smallmouth and Largemouth Bass Estrogenic Biomarker Data The data was gathered to document the extent and severity of biomarkers of exposure to estrogenic chemicals in smallmouth and largemouth bass. Samples were collected from 2004 through 2010 at sites in five watersheds within the Chesapeake Bay watershed. A total of 281 largemouth bass were collected from the Potomac, Susquehanna, Patuxent and Rappahannock rivers and 1,384 smallmouth bass from the Potomac, Susquehanna and James. Fish were collected by boat electroshocking, euthanized in the field, weighed, measured, a blood samples collected and a necropsy completed that included documenting any visible abnormalities and collecting tissues for histopathology. Plasma obtained from blood samples was analyzed for vitellogenin,... Categories: Data; Tags: Maryland, Pennsylvania, USGS Science Data Catalog (SDC), Virginia, West Virginia, All tags... histology, intersex, largemouth bass, smallmouth bass, vitellogenin, Fewer tags Water Chemistry and Smallmouth Bass Biological Data from Pine Creek and West Branch Mahantango Creek, Pennsylvania, 2015-2019 Monitoring wild fish health and associated exposure effects in regions where agriculture and development have impacted rivers and streams has become a valuable research tool. Smallmouth bass (Micropterus dolomieu) are a sensitive, indicator species that exhibit symptoms of immunosupression and endocrine disruption in response to water quality changes and contaminant exposure. In the Susquehanna River drainage, smallmouth bass have been used in biomonitoring assessments to help understand changes in the population due to poor young-of-the-year recruitment and health effects. To help determine effects of agriculture and development on smallmouth bass health, two sites (a developed/agriculture site and a forested site)... Categories: Data; Tags: Aquatic Biology, Chesapeake Bay Drainage, Ecology, Pennsylvania, Pine Creek, All tags... Susquehanna River Drainage, USGS Science Data Catalog (SDC), West Branch Mahantango Creek, biota, condition factor, contaminants, health assessment index, hepatic gene transcripts, hepatosomatic index, land use, macrophage aggregates, parasites, wild fish health, Fewer tags Morphometric, Age, Visible Abnormalities, Skin and Liver Neoplasms, and Stable Isotopes in White Sucker Collected in the St. Louis River and Estuary, Minnesota/Wisconsin, 2011-2015 The dataset provides length, weight, age, observations of visible external abnormalities, liver and skin histopathology and stable isotopes of white sucker captured within the St. Louis river and associated bays. Categories: Data; Tags: Environmental Health, St. Louis Bay, St. Louis River, Superior Bay, USGS Science Data Catalog (SDC), All tags... biota, liver tumors, skin tumors, stable isotopes, Fewer tags Estrogen Equivalents of Surface Water in the Upper Chesapeake Bay Watershed (2008 - 2011) Intersex in small- and largemouth bass has been observed in the upper Chesapeake Bay Watershed since 2003. This observation is indicative of exposure to estrogenic endocrine disrupting chemicals. In order to complement biological data sets and better identify the spatial and temporal nature of this end-point, discrete grab water samples were collected throughout the upper Chesapeake Bay Watershed for the evaluation of estrogenic activity. Data reported here are estrogenicity values derived from bioassay screening of OASIS-HLB extracts discrete grab water samples. Estrogenicity was determined using a bioluminescent yeast estrogen screen. Here we report estrogenicity data for selected sites in the Chesapeake Bay water... Categories: Data; Tags: Environmental Health, Maryland, Pennsylvania, USGS Science Data Catalog (SDC), Virginia, All tags... Water Quality, West Virginia, bioassay, environmental health, estrogenicity, field monitoring stations, field sampling, Fewer tags Morphometric, Age and Concentrations of Perfluoroalkyl Substances in Smallmouth Bass Plasma from Four Sites in the Chesapeake Bay watershed Archived plasma from fish health monitoring sites within the Chesapeake Bay watershed was analyzed for 13 perfluoroalkyl compounds. Smallmouth bass were collected from two sites in the Potomac River drainage (Antietam Creek, Maryland and South Branch Potomac, West Virginia) and two in the Susquehanna River drainage (West Branch Mahantango Creek, Pennsylvania and Pine Creek, Pennsylvania). Site and date of collection, length, weight and age of each adult smallmouth bass were documented. Four compounds were detected in every plasma sample, while two additonal compounds were only occasionally observed at low concentrations. Categories: Data; Tags: Aquatic Biology, Environmental Health, Potomac River, Susquehanna River, USGS Science Data Catalog (SDC), All tags... Wildlife Biology, biota, environment, none, perfluoroalkyl, perfluoroalkyl compounds, plasma, Fewer tags Immune Function of Wild Smallmouth Bass Collected from Sites within the Chesapeake Bay Watershed, 2016-2021 Adult and young of the year smallmouth bass from the Chesapeake Bay watershed have faced health issues (mortality events, disease by a variety of pathogens, endocrine disruption in male fish, evidence of oxidative damage to tissues, and signs of exposure to chemical contaminants) at multiple sites within the Susquehanna and Potomac River basins. Functional immune assays were added to long-term comprehensive monitoring assessments to determine if immunosuppression was playing a role in observed disease and mortalities because no one single or consistent cause could be identified. The functional immune assays measured bactericidal activity, respiratory burst activity, and lymphocyte mitogenesis using leukocytes isolated... Categories: Data; Tags: Environmental Health, Potomac River, Potomac River basin, Susquehanna River, Susquehanna River basin, All tags... USGS Science Data Catalog (SDC), biota, environmental stressors, health, immune function, none, smallmouth bass, Fewer tags Estrogen equivalents of surface water and smallmouth bass estrogenic biomarker data in New Jersey, 2016-2017 The data were gathered as a preliminary assessment of estrogenicity under base-flow conditions at over 100 sites (lakes and streams) throughout New Jersey followed by more targeted sampling of smallmouth bass at nine sites with varying levels of estrogenicity. In 2016, 102 sites (lakes and streams) for the preliminary estrogenicity assessment were selected utilizing compiled results of previous monitoring studies (chemical and biological), current sampling networks, and other areas of concern based on input from stakeholders. Discrete grab surface water samples were collected under base-flow conditions in the fall of 2016 and analyzed for levels of estrogenicity using a bioluminescent yeast screen. Water samples... Tags: Aquatic Biology, Environmental Health, Hydrogeology, Micropterus dolomieu, New Jersey, All tags... USGS Science Data Catalog (SDC), Water Quality, Wildlife Biology, endocrinology, environmental health, estrogenicity, intersex, lakes, rivers, smallmouth bass, streams, Fewer tags