Vicki S. Blazer, PhD (Former Employee)
Science and Products
Filter Total Items: 22
Filter Total Items: 20
No Result Found
Filter Total Items: 198
Nonlesions, misdiagnoses, missed diagnoses, and other interpretive challenges in fish histopathology studies: a guide for investigators, authors, reviewers, and readers Nonlesions, misdiagnoses, missed diagnoses, and other interpretive challenges in fish histopathology studies: a guide for investigators, authors, reviewers, and readers
Differentiating salient histopathologic changes from normal anatomic features or tissue artifacts can be decidedly challenging, especially for the novice fish pathologist. As a consequence, findings of questionable accuracy may be reported inadvertently, and the potential negative impacts of publishing inaccurate histopathologic interpretations are not always fully appreciated. The...
Authors
Jeffrey C. Wolf, Wes A. Baumgartner, Vicki Blazer, Alvin C. Camus, Jeffrey A. Engelhardt, John W. Fournie, Salvatore Frasca, David B. Groman, Michael L. Kent, Lester H. Khoo, Jerry M. Law, Eric D. Lombardini, Christine Ruehl-Fehlert, Helmut E. Segner, Stephen A. Smith, Jan M. Spitsbergen, Klaus Weber, Marilyn J. Wolfe
Reproductive health indicators of fishes from Pennsylvania watersheds: association with chemicals of emerging concern Reproductive health indicators of fishes from Pennsylvania watersheds: association with chemicals of emerging concern
Fishes were collected at 16 sites within the three major river drainages (Delaware, Susquehanna, and Ohio) of Pennsylvania. Three species were evaluated for biomarkers of estrogenic/antiandrogenic exposure, including plasma vitellogenin and testicular oocytes in male fishes. Smallmouth bass Micropterus dolomieu, white sucker Catostomus commersonii, and redhorse sucker Moxostoma species...
Authors
V. S. Blazer, D.D. Iwanowicz, H.L. Walsh, A.J. Sperry, L. R. Iwanowicz, D.A. Alvarez, R.A. Brightbill, G. Smith, W.T. Foreman, R. Manning
Assessment of the fish tumor beneficial use impairment in brown bullhead (Ameiurus nebulosus) at selected Great Lakes Areas of Concern Assessment of the fish tumor beneficial use impairment in brown bullhead (Ameiurus nebulosus) at selected Great Lakes Areas of Concern
A total of 878 adult Brown Bullhead were collected at 11 sites within the Lake Erie and Lake Ontario drainages from 2011 to 2013. The sites included seven Areas of Concern (AOC; 670 individuals), one delisted AOC (50 individuals) and three non-AOC sites (158 individuals) used as reference sites. These fish were used to assess the “fish tumor or other deformities” beneficial use...
Authors
Vicki Blazer, Patricia M. Mazik, Luke R. Iwanowicz, Ryan P. Braham, Cassidy M. Hahn, Heather L. Walsh, Adam J. Sperry
Channel catfish (Ictalurus punctatus) leukocytes express estrogen receptor isoforms ERα and ERβ2 and are functionally modulated by estrogens Channel catfish (Ictalurus punctatus) leukocytes express estrogen receptor isoforms ERα and ERβ2 and are functionally modulated by estrogens
Estrogens are recognized as modulators of immune responses in mammals and teleosts. While it is known that the effects of estrogens are mediated via leukocyte-specific estrogen receptors (ERs) in humans and mice, leucocyte-specific estrogen receptor expression and the effects of estrogens on this cell population is less explored and poorly understood in teleosts. Here in, we verify that...
Authors
Luke R. Iwanowicz, James L. Stafford, Reynaldo Patiño, Eva Bengten, Norman W. Miller, Vicki Blazer
Monitoring of wild fish health at selected sites in the Great Lakes Basin: methods and preliminary results Monitoring of wild fish health at selected sites in the Great Lakes Basin: methods and preliminary results
During fall 2010 and spring 2011, a total of 119 brown bullhead (Ameiurus nebulosus), 136 white sucker (Catostomus commersoni), 73 smallmouth bass (Micropterus dolomieu), and 59 largemouth bass (M. salmoides) were collected from seven Great Lakes Basin Areas of Concern and one Reference Site. Comprehensive fish health assessments were conducted in order to document potential adverse...
Authors
Vicki Blazer, Patricia M. Mazik, Luke R. Iwanowicz, Ryan Braham, Cassidy Hahn, Heather L. Walsh, Adam Sperry
Health of white sucker within the St. Louis River area of concern associated with habitat usage as assessed using stable isotopes Health of white sucker within the St. Louis River area of concern associated with habitat usage as assessed using stable isotopes
In Spring 2011, 200 adult white sucker were collected in four areas of the St. Louis River area of concern (AOC), located in Minnesota and Wisconsin, USA. The areas included the upper AOC as a reference area, the upper estuary, St. Louis Bay and Superior Bay. Grossly visible abnormalities were documented and preserved for microscopic analyses, as were five to eight representative pieces...
Authors
V. S. Blazer, J. Hoffman, H.L. Walsh, R.P. Braham, C. Hahn, P. Collins, Z. Jorgenson, T. Ledder
Transgenic zebrafish reveal tissue-specific differences in estrogen signaling in response to environmental water samples Transgenic zebrafish reveal tissue-specific differences in estrogen signaling in response to environmental water samples
Background: Environmental endocrine disruptors (EED) are exogenous chemicals that mimic endogenous hormones, such as estrogens. Previous studies using a zebrafish transgenic reporter demonstrated that the EEDs bisphenol A and genistein preferentially activate estrogen receptors (ER) in the larval heart compared to the liver. However, it was not known whether the transgenic zebrafish...
Authors
Daniel A. Gorelick, Luke R. Iwanowicz, Alice L. Hung, Vicki Blazer, Marnie E. Halpern
Biological effects-based tools for monitoring impacted surface waters in the Great Lakes: a multiagency program in support of the Great Lakes Restoration Initiative Biological effects-based tools for monitoring impacted surface waters in the Great Lakes: a multiagency program in support of the Great Lakes Restoration Initiative
There is increasing demand for the implementation of effects-based monitoring and surveillance (EBMS) approaches in the Great Lakes Basin to complement traditional chemical monitoring. Herein, we describe an ongoing multiagency effort to develop and implement EBMS tools, particularly with regard to monitoring potentially toxic chemicals and assessing Areas of Concern (AOCs), as...
Authors
Drew R. Ekman, Gerald T. Ankley, Vicki Blazer, Timothy W. Collette, Natàlia Garcia-Reyero, Luke R. Iwanowicz, Zachary G. Jorgensen, Kathy Lee, Pat M. Mazik, David H. Miller, Edward J. Perkins, Edwin T. Smith, Joseph E. Tietge, Daniel L. Villeneuve
Reproductive health of yellow perch, Perca flavescens, in Chesapeake Bay Tributaries Reproductive health of yellow perch, Perca flavescens, in Chesapeake Bay Tributaries
Yellow perch live in creeks, rivers, ponds, lakes, and estuaries across the central and eastern United States and Canada. In Chesapeake Bay, they tolerate salinities up to one-third that of seawater. The adults reside in the brackish waters of the bay’s tributaries and migrate upstream to spawn. Yellow perch are eagerly sought by recreational fishermen for their excellent taste and...
Authors
Vicki Blazer, A.E. Pinkney, James H. Uphoff
Chemical contaminants in water and sediment near fish nesting sites in the Potomac River basin: determining potential exposures to smallmouth bass (Micropterus dolomieu) Chemical contaminants in water and sediment near fish nesting sites in the Potomac River basin: determining potential exposures to smallmouth bass (Micropterus dolomieu)
The Potomac River basin is an area where a high prevalence of abnormalities such as testicular oocytes (TO), skin lesions, and mortality has been observed in smallmouth bass (SMB, Micropterus dolomieu). Previous research documented a variety of chemicals in regional streams, implicating chemical exposure as one plausible explanation for these biological effects. Six stream sites in the...
Authors
Dana W. Kolpin, Vicki Blazer, James L. Gray, Michael J. Focazio, John A. Young, David A. Alvarez, Luke R. Iwanowicz, William T. Foreman, Edward T. Furlong, Gary K. Speiran, Steven D. Zaugg, Laura E. Hubbard, Michael T. Meyer, Mark W. Sandstrom, Larry B. Barber
Reproductive health of yellow perch Perca flavescens in selected tributaries of the Chesapeake Bay Reproductive health of yellow perch Perca flavescens in selected tributaries of the Chesapeake Bay
Reduced recruitment of yellow perch has been noted for a number of years in certain urbanized watersheds (South and Severn Rivers) of the Chesapeake Bay. Other rapidly developing watersheds such as Mattawoman Creek are more recently showing evidence of reduced recruitment of anadromous fishes. In this study, we used a battery of biomarkers to better document the reproductive health of...
Authors
Vicki Blazer, Alfred E. Pinkney, Jill A. Jenkins, Luke R. Iwanowicz, Steven Minkkinen, Rassa O. Draugelis-Dale, James H. Uphoff
Bacterial etiology in diseased fishes, primarily smallmouth bass Micropterus dolomieu, within the Chesapeake Bay drainage in 2009-2011 Bacterial etiology in diseased fishes, primarily smallmouth bass Micropterus dolomieu, within the Chesapeake Bay drainage in 2009-2011
No abstract available.
Authors
Clifford E. Starliper, Vicki Blazer, Luke R. Iwanowicz, Heather L. Walsh
Filter Total Items: 13
Science and Products
Filter Total Items: 22
Filter Total Items: 20
No Result Found
Filter Total Items: 198
Nonlesions, misdiagnoses, missed diagnoses, and other interpretive challenges in fish histopathology studies: a guide for investigators, authors, reviewers, and readers Nonlesions, misdiagnoses, missed diagnoses, and other interpretive challenges in fish histopathology studies: a guide for investigators, authors, reviewers, and readers
Differentiating salient histopathologic changes from normal anatomic features or tissue artifacts can be decidedly challenging, especially for the novice fish pathologist. As a consequence, findings of questionable accuracy may be reported inadvertently, and the potential negative impacts of publishing inaccurate histopathologic interpretations are not always fully appreciated. The...
Authors
Jeffrey C. Wolf, Wes A. Baumgartner, Vicki Blazer, Alvin C. Camus, Jeffrey A. Engelhardt, John W. Fournie, Salvatore Frasca, David B. Groman, Michael L. Kent, Lester H. Khoo, Jerry M. Law, Eric D. Lombardini, Christine Ruehl-Fehlert, Helmut E. Segner, Stephen A. Smith, Jan M. Spitsbergen, Klaus Weber, Marilyn J. Wolfe
Reproductive health indicators of fishes from Pennsylvania watersheds: association with chemicals of emerging concern Reproductive health indicators of fishes from Pennsylvania watersheds: association with chemicals of emerging concern
Fishes were collected at 16 sites within the three major river drainages (Delaware, Susquehanna, and Ohio) of Pennsylvania. Three species were evaluated for biomarkers of estrogenic/antiandrogenic exposure, including plasma vitellogenin and testicular oocytes in male fishes. Smallmouth bass Micropterus dolomieu, white sucker Catostomus commersonii, and redhorse sucker Moxostoma species...
Authors
V. S. Blazer, D.D. Iwanowicz, H.L. Walsh, A.J. Sperry, L. R. Iwanowicz, D.A. Alvarez, R.A. Brightbill, G. Smith, W.T. Foreman, R. Manning
Assessment of the fish tumor beneficial use impairment in brown bullhead (Ameiurus nebulosus) at selected Great Lakes Areas of Concern Assessment of the fish tumor beneficial use impairment in brown bullhead (Ameiurus nebulosus) at selected Great Lakes Areas of Concern
A total of 878 adult Brown Bullhead were collected at 11 sites within the Lake Erie and Lake Ontario drainages from 2011 to 2013. The sites included seven Areas of Concern (AOC; 670 individuals), one delisted AOC (50 individuals) and three non-AOC sites (158 individuals) used as reference sites. These fish were used to assess the “fish tumor or other deformities” beneficial use...
Authors
Vicki Blazer, Patricia M. Mazik, Luke R. Iwanowicz, Ryan P. Braham, Cassidy M. Hahn, Heather L. Walsh, Adam J. Sperry
Channel catfish (Ictalurus punctatus) leukocytes express estrogen receptor isoforms ERα and ERβ2 and are functionally modulated by estrogens Channel catfish (Ictalurus punctatus) leukocytes express estrogen receptor isoforms ERα and ERβ2 and are functionally modulated by estrogens
Estrogens are recognized as modulators of immune responses in mammals and teleosts. While it is known that the effects of estrogens are mediated via leukocyte-specific estrogen receptors (ERs) in humans and mice, leucocyte-specific estrogen receptor expression and the effects of estrogens on this cell population is less explored and poorly understood in teleosts. Here in, we verify that...
Authors
Luke R. Iwanowicz, James L. Stafford, Reynaldo Patiño, Eva Bengten, Norman W. Miller, Vicki Blazer
Monitoring of wild fish health at selected sites in the Great Lakes Basin: methods and preliminary results Monitoring of wild fish health at selected sites in the Great Lakes Basin: methods and preliminary results
During fall 2010 and spring 2011, a total of 119 brown bullhead (Ameiurus nebulosus), 136 white sucker (Catostomus commersoni), 73 smallmouth bass (Micropterus dolomieu), and 59 largemouth bass (M. salmoides) were collected from seven Great Lakes Basin Areas of Concern and one Reference Site. Comprehensive fish health assessments were conducted in order to document potential adverse...
Authors
Vicki Blazer, Patricia M. Mazik, Luke R. Iwanowicz, Ryan Braham, Cassidy Hahn, Heather L. Walsh, Adam Sperry
Health of white sucker within the St. Louis River area of concern associated with habitat usage as assessed using stable isotopes Health of white sucker within the St. Louis River area of concern associated with habitat usage as assessed using stable isotopes
In Spring 2011, 200 adult white sucker were collected in four areas of the St. Louis River area of concern (AOC), located in Minnesota and Wisconsin, USA. The areas included the upper AOC as a reference area, the upper estuary, St. Louis Bay and Superior Bay. Grossly visible abnormalities were documented and preserved for microscopic analyses, as were five to eight representative pieces...
Authors
V. S. Blazer, J. Hoffman, H.L. Walsh, R.P. Braham, C. Hahn, P. Collins, Z. Jorgenson, T. Ledder
Transgenic zebrafish reveal tissue-specific differences in estrogen signaling in response to environmental water samples Transgenic zebrafish reveal tissue-specific differences in estrogen signaling in response to environmental water samples
Background: Environmental endocrine disruptors (EED) are exogenous chemicals that mimic endogenous hormones, such as estrogens. Previous studies using a zebrafish transgenic reporter demonstrated that the EEDs bisphenol A and genistein preferentially activate estrogen receptors (ER) in the larval heart compared to the liver. However, it was not known whether the transgenic zebrafish...
Authors
Daniel A. Gorelick, Luke R. Iwanowicz, Alice L. Hung, Vicki Blazer, Marnie E. Halpern
Biological effects-based tools for monitoring impacted surface waters in the Great Lakes: a multiagency program in support of the Great Lakes Restoration Initiative Biological effects-based tools for monitoring impacted surface waters in the Great Lakes: a multiagency program in support of the Great Lakes Restoration Initiative
There is increasing demand for the implementation of effects-based monitoring and surveillance (EBMS) approaches in the Great Lakes Basin to complement traditional chemical monitoring. Herein, we describe an ongoing multiagency effort to develop and implement EBMS tools, particularly with regard to monitoring potentially toxic chemicals and assessing Areas of Concern (AOCs), as...
Authors
Drew R. Ekman, Gerald T. Ankley, Vicki Blazer, Timothy W. Collette, Natàlia Garcia-Reyero, Luke R. Iwanowicz, Zachary G. Jorgensen, Kathy Lee, Pat M. Mazik, David H. Miller, Edward J. Perkins, Edwin T. Smith, Joseph E. Tietge, Daniel L. Villeneuve
Reproductive health of yellow perch, Perca flavescens, in Chesapeake Bay Tributaries Reproductive health of yellow perch, Perca flavescens, in Chesapeake Bay Tributaries
Yellow perch live in creeks, rivers, ponds, lakes, and estuaries across the central and eastern United States and Canada. In Chesapeake Bay, they tolerate salinities up to one-third that of seawater. The adults reside in the brackish waters of the bay’s tributaries and migrate upstream to spawn. Yellow perch are eagerly sought by recreational fishermen for their excellent taste and...
Authors
Vicki Blazer, A.E. Pinkney, James H. Uphoff
Chemical contaminants in water and sediment near fish nesting sites in the Potomac River basin: determining potential exposures to smallmouth bass (Micropterus dolomieu) Chemical contaminants in water and sediment near fish nesting sites in the Potomac River basin: determining potential exposures to smallmouth bass (Micropterus dolomieu)
The Potomac River basin is an area where a high prevalence of abnormalities such as testicular oocytes (TO), skin lesions, and mortality has been observed in smallmouth bass (SMB, Micropterus dolomieu). Previous research documented a variety of chemicals in regional streams, implicating chemical exposure as one plausible explanation for these biological effects. Six stream sites in the...
Authors
Dana W. Kolpin, Vicki Blazer, James L. Gray, Michael J. Focazio, John A. Young, David A. Alvarez, Luke R. Iwanowicz, William T. Foreman, Edward T. Furlong, Gary K. Speiran, Steven D. Zaugg, Laura E. Hubbard, Michael T. Meyer, Mark W. Sandstrom, Larry B. Barber
Reproductive health of yellow perch Perca flavescens in selected tributaries of the Chesapeake Bay Reproductive health of yellow perch Perca flavescens in selected tributaries of the Chesapeake Bay
Reduced recruitment of yellow perch has been noted for a number of years in certain urbanized watersheds (South and Severn Rivers) of the Chesapeake Bay. Other rapidly developing watersheds such as Mattawoman Creek are more recently showing evidence of reduced recruitment of anadromous fishes. In this study, we used a battery of biomarkers to better document the reproductive health of...
Authors
Vicki Blazer, Alfred E. Pinkney, Jill A. Jenkins, Luke R. Iwanowicz, Steven Minkkinen, Rassa O. Draugelis-Dale, James H. Uphoff
Bacterial etiology in diseased fishes, primarily smallmouth bass Micropterus dolomieu, within the Chesapeake Bay drainage in 2009-2011 Bacterial etiology in diseased fishes, primarily smallmouth bass Micropterus dolomieu, within the Chesapeake Bay drainage in 2009-2011
No abstract available.
Authors
Clifford E. Starliper, Vicki Blazer, Luke R. Iwanowicz, Heather L. Walsh
Filter Total Items: 13
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government