Close-up of an invasive blue catfish (Ictalurus furcatus) specimen collected during fieldwork in the Nanticoke River system to assess impacts of this invasive species on aquatic resources in the region.
Christine Densmore (Former Employee)
Science and Products
Developing a Process for Listing Injurious Wildlife Species
This project will develop a transparent process for prioritizing species for listing as injurious, likely to cause damage or harm, under the Lacey Act. Building upon previously developed "horizon scan" and "watchlist" products, this process will identify potentially invasive species that present the greatest risk to lands, waters, and other assets managed by the U.S. Department of the Interior.
Invasive Blue Catfish Science to Support Conservation and Fisheries Management
Dietary analyses, health, and reproduction of blue catfish in tributaries of the Chesapeake Bay inform ecosystem impacts and mitigation strategies for this aquatic nuisance species.
Mycobacteriosis among northern snakehead fish in the Potomac River
Mycobacteriosis among northern snakehead fish in the Potomac River
Avian influenza virus in the aquatic environment: Surveillance in waterfowl habitat on the Delmarva Peninsula.
Avian influenza virus in the aquatic environment: Surveillance in waterfowl habitat on the Delmarva Peninsula.
An Evaluation of the Toxicity of Potassium Chloride, Active Compound in the Molluscicide Potash, on Salmonid Fish and Their Forage Base
Potash, with the active ingredient potassium chloride (KCl) is a chemical that is currently being evaluated for potential use as a molluscicide to combat invasive zebra mussels and quagga mussels in Western United States waters.
Disease and Environmental Stress
Disease may be caused by infectious agents, nutritional imbalances, physiological or genetically-based abnormalities, and suboptimal environmental conditions, acting either alone or in combination with other factors. In many instances, environmental stressors may merge forces with an infectious agent or some other non-infectious factor to produce or exacerbate a state of disease. By studying...
Invasive pathogens
Streamside salamanders such as this one are susceptible to invasive fungal pathogens of the genus Batrachochytrium. Two types of emerging fungal agents, B. dendrobatidis and B. salamandrivorans have been identified as serious risks to our amphibian populations.
Invasive northern snakehead fish
Invasive northern snakehead fish
Health assessment of invasive northern snakehead
The image is an investigator performing venipuncture for blood collection for health analysis of a northern snakehead fish collected from a Potomac River tributary in northern Virginia.
Mallard ducks may serve as reservoirs of potentially zoonotic Type A influenza viruses.
Mallard duck as such as this pair may be reservoirs of Type A influenza viruses, which under some circumstances may potentially become pathogenic to waterfowl, other wildlife and even humans.
Invasive blue catfish from Nanticoke River
Close-up of an invasive blue catfish (Ictalurus furcatus) specimen collected during fieldwork in the Nanticoke River system to assess impacts of this invasive species on aquatic resources in the region.
Preparing the Autoclave
Chris Ottinger prepares the autoclave at the Leetown, WV lab for waste decontamination.
Chris Ottinger prepares the autoclave at the Leetown, WV lab for waste decontamination.
Blue catfish specimen
Blue catfish (Ictalurus furcatus) are an important aquatic invasive species throughout many Chesapeake Bay tributaries. Scientists from the EESC are working with federal, state, and regional partners to assess the potential impacts of blue catfish on native fauna and important fisheries resources throughout the region.
Blue catfish (Ictalurus furcatus) are an important aquatic invasive species throughout many Chesapeake Bay tributaries. Scientists from the EESC are working with federal, state, and regional partners to assess the potential impacts of blue catfish on native fauna and important fisheries resources throughout the region.
Myobacterial culture
Mycobacteriosis is a bacterial disease that can affect many species of fish around the world. We are studying the impacts of mycobacteriosis among northern snakehead from the Potomac River to better understand this disease in the species and the potential impacts to other aquatic animals.
Mycobacteriosis is a bacterial disease that can affect many species of fish around the world. We are studying the impacts of mycobacteriosis among northern snakehead from the Potomac River to better understand this disease in the species and the potential impacts to other aquatic animals.
Northern snakehead fish
Northern snakehead (Channa argus) are an invasive species in the mid-Atlantic region. Scientists from EESC are working with our federal and state partners to learn more about northern snakehead and their potential impcats to other aquatic animals in the region.
Northern snakehead (Channa argus) are an invasive species in the mid-Atlantic region. Scientists from EESC are working with our federal and state partners to learn more about northern snakehead and their potential impcats to other aquatic animals in the region.
Curious salamander
A plethodontid (lungless) salamander peaks over the top of a collection bucket as it awaited return to its habitat.
A plethodontid (lungless) salamander peaks over the top of a collection bucket as it awaited return to its habitat.
Mallard Ducks
Male and female mallard ducks swimming along at Blackwater National Wildlife Refuge near Cambridge, MD.
Male and female mallard ducks swimming along at Blackwater National Wildlife Refuge near Cambridge, MD.
Science and Products
Developing a Process for Listing Injurious Wildlife Species
This project will develop a transparent process for prioritizing species for listing as injurious, likely to cause damage or harm, under the Lacey Act. Building upon previously developed "horizon scan" and "watchlist" products, this process will identify potentially invasive species that present the greatest risk to lands, waters, and other assets managed by the U.S. Department of the Interior.
Invasive Blue Catfish Science to Support Conservation and Fisheries Management
Dietary analyses, health, and reproduction of blue catfish in tributaries of the Chesapeake Bay inform ecosystem impacts and mitigation strategies for this aquatic nuisance species.
Mycobacteriosis among northern snakehead fish in the Potomac River
Mycobacteriosis among northern snakehead fish in the Potomac River
Avian influenza virus in the aquatic environment: Surveillance in waterfowl habitat on the Delmarva Peninsula.
Avian influenza virus in the aquatic environment: Surveillance in waterfowl habitat on the Delmarva Peninsula.
An Evaluation of the Toxicity of Potassium Chloride, Active Compound in the Molluscicide Potash, on Salmonid Fish and Their Forage Base
Potash, with the active ingredient potassium chloride (KCl) is a chemical that is currently being evaluated for potential use as a molluscicide to combat invasive zebra mussels and quagga mussels in Western United States waters.
Disease and Environmental Stress
Disease may be caused by infectious agents, nutritional imbalances, physiological or genetically-based abnormalities, and suboptimal environmental conditions, acting either alone or in combination with other factors. In many instances, environmental stressors may merge forces with an infectious agent or some other non-infectious factor to produce or exacerbate a state of disease. By studying...
Invasive pathogens
Streamside salamanders such as this one are susceptible to invasive fungal pathogens of the genus Batrachochytrium. Two types of emerging fungal agents, B. dendrobatidis and B. salamandrivorans have been identified as serious risks to our amphibian populations.
Invasive northern snakehead fish
Invasive northern snakehead fish
Health assessment of invasive northern snakehead
The image is an investigator performing venipuncture for blood collection for health analysis of a northern snakehead fish collected from a Potomac River tributary in northern Virginia.
Mallard ducks may serve as reservoirs of potentially zoonotic Type A influenza viruses.
Mallard duck as such as this pair may be reservoirs of Type A influenza viruses, which under some circumstances may potentially become pathogenic to waterfowl, other wildlife and even humans.
Invasive blue catfish from Nanticoke River
Close-up of an invasive blue catfish (Ictalurus furcatus) specimen collected during fieldwork in the Nanticoke River system to assess impacts of this invasive species on aquatic resources in the region.
Close-up of an invasive blue catfish (Ictalurus furcatus) specimen collected during fieldwork in the Nanticoke River system to assess impacts of this invasive species on aquatic resources in the region.
Preparing the Autoclave
Chris Ottinger prepares the autoclave at the Leetown, WV lab for waste decontamination.
Chris Ottinger prepares the autoclave at the Leetown, WV lab for waste decontamination.
Blue catfish specimen
Blue catfish (Ictalurus furcatus) are an important aquatic invasive species throughout many Chesapeake Bay tributaries. Scientists from the EESC are working with federal, state, and regional partners to assess the potential impacts of blue catfish on native fauna and important fisheries resources throughout the region.
Blue catfish (Ictalurus furcatus) are an important aquatic invasive species throughout many Chesapeake Bay tributaries. Scientists from the EESC are working with federal, state, and regional partners to assess the potential impacts of blue catfish on native fauna and important fisheries resources throughout the region.
Myobacterial culture
Mycobacteriosis is a bacterial disease that can affect many species of fish around the world. We are studying the impacts of mycobacteriosis among northern snakehead from the Potomac River to better understand this disease in the species and the potential impacts to other aquatic animals.
Mycobacteriosis is a bacterial disease that can affect many species of fish around the world. We are studying the impacts of mycobacteriosis among northern snakehead from the Potomac River to better understand this disease in the species and the potential impacts to other aquatic animals.
Northern snakehead fish
Northern snakehead (Channa argus) are an invasive species in the mid-Atlantic region. Scientists from EESC are working with our federal and state partners to learn more about northern snakehead and their potential impcats to other aquatic animals in the region.
Northern snakehead (Channa argus) are an invasive species in the mid-Atlantic region. Scientists from EESC are working with our federal and state partners to learn more about northern snakehead and their potential impcats to other aquatic animals in the region.
Curious salamander
A plethodontid (lungless) salamander peaks over the top of a collection bucket as it awaited return to its habitat.
A plethodontid (lungless) salamander peaks over the top of a collection bucket as it awaited return to its habitat.
Mallard Ducks
Male and female mallard ducks swimming along at Blackwater National Wildlife Refuge near Cambridge, MD.
Male and female mallard ducks swimming along at Blackwater National Wildlife Refuge near Cambridge, MD.
*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