Vicki S Blazer

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

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

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