Skip to main content
U.S. flag

An official website of the United States government

Invasive Animals

Invasive animals including mammals, reptiles, fish, birds and other organisms enter the United States through a variety of pathways both within the U.S. and nationally. USGS invasive species research encompasses all significant groups of invasive organisms in terrestrial and aquatic ecosystems throughout the U.S.

Filter Total Items: 20

Using Robots in the River: Biosurveillance at USGS streamgages

For more than a decade, researchers around the world have shown that sampling a water body and analyzing for DNA (a method known as eDNA) is an effective method to detect an organism in the water. The challenge is that finding organisms that are not very abundant requires a lot of samples to locate this needle in a haystack. Enter the "lab in a can", the water quality sampling and processing robot...
link

Using Robots in the River: Biosurveillance at USGS streamgages

For more than a decade, researchers around the world have shown that sampling a water body and analyzing for DNA (a method known as eDNA) is an effective method to detect an organism in the water. The challenge is that finding organisms that are not very abundant requires a lot of samples to locate this needle in a haystack. Enter the "lab in a can", the water quality sampling and processing robot...
Learn More

Forensic Markers of Lampricide Toxicity & Mortality in Non-Target Fishes

The pesticides 3-trifluoromethyl-4-nitrophenol (TFM) and niclosamide selectively target larval sea lampreys (Petromyzon marinus) because they have a much lower capacity to detoxify these lampricides by forming glucuronide conjugates compared to typical non-target fishes. However, if lampricide uptake overwhelms a fish's detoxification capacity, non-target mortality can result. Non-target mortality...
link

Forensic Markers of Lampricide Toxicity & Mortality in Non-Target Fishes

The pesticides 3-trifluoromethyl-4-nitrophenol (TFM) and niclosamide selectively target larval sea lampreys (Petromyzon marinus) because they have a much lower capacity to detoxify these lampricides by forming glucuronide conjugates compared to typical non-target fishes. However, if lampricide uptake overwhelms a fish's detoxification capacity, non-target mortality can result. Non-target mortality...
Learn More

Experimental suppression of invasive lake trout: Implications for conservation of imperiled bull trout in Glacier National Park

After 14,000 years of dominance, Glacier National Park’s (GNP) greatest native aquatic predator is at high risk of extirpation (local extinction) in several lakes on the western slopes of the Continental Divide. The decline of threatened bull trout in GNP is directly attributed to the invasion and establishment of nonnative lake trout, which consistently displace bull trout in systems where lake...
link

Experimental suppression of invasive lake trout: Implications for conservation of imperiled bull trout in Glacier National Park

After 14,000 years of dominance, Glacier National Park’s (GNP) greatest native aquatic predator is at high risk of extirpation (local extinction) in several lakes on the western slopes of the Continental Divide. The decline of threatened bull trout in GNP is directly attributed to the invasion and establishment of nonnative lake trout, which consistently displace bull trout in systems where lake...
Learn More

Feral Pig Abundance at Hakalau Forest National Wildlife Refuge

Feral pigs (Sus scrofa) have been identified as a significant problem in 120 U.S. National Wildlife Refuges. Pigs cause substantial degradation to natural ecosystems through rooting, digging, and browsing, but they are particularly destructive in Hawai‘I, which has no native terrestrial large mammals.
link

Feral Pig Abundance at Hakalau Forest National Wildlife Refuge

Feral pigs (Sus scrofa) have been identified as a significant problem in 120 U.S. National Wildlife Refuges. Pigs cause substantial degradation to natural ecosystems through rooting, digging, and browsing, but they are particularly destructive in Hawai‘I, which has no native terrestrial large mammals.
Learn More

Asian Carp Early Detection

Increased threat of Asian carp entering the Great Lakes and spreading to other basins such as the Upper Mississippi River and Ohio River basins, has led to increased prevention and control efforts since 2010. In collaboration with partners, USGS scientists are testing early detection methods and technologies to enhance the ability of agencies to manage Asian carp to minimize their influence and...
link

Asian Carp Early Detection

Increased threat of Asian carp entering the Great Lakes and spreading to other basins such as the Upper Mississippi River and Ohio River basins, has led to increased prevention and control efforts since 2010. In collaboration with partners, USGS scientists are testing early detection methods and technologies to enhance the ability of agencies to manage Asian carp to minimize their influence and...
Learn More

Asian Carp Risk Assessment and Life History

Increased threat of Asian carp entering the Great Lakes and spreading to other basins such as the Upper Mississippi River and Ohio River basins, has led to increased prevention and control efforts since 2010. USGS Asian carp biology and life history research has led to the development of models, tools and strategies to better understand the risk of Asian carp establishment and survival.USGS...
link

Asian Carp Risk Assessment and Life History

Increased threat of Asian carp entering the Great Lakes and spreading to other basins such as the Upper Mississippi River and Ohio River basins, has led to increased prevention and control efforts since 2010. USGS Asian carp biology and life history research has led to the development of models, tools and strategies to better understand the risk of Asian carp establishment and survival.USGS...
Learn More

Asian Carp Integrated Control and Containment

Increased threat of Asian carp entering the Great Lakes and spreading to other basins such as the Upper Mississippi River and Ohio River basins, has led to increased prevention and control efforts since 2010. Successful management of invasive species requires methods to contain future spread, reduce population levels, and minimize their effects. In collaboration with partners, USGS scientists have...
link

Asian Carp Integrated Control and Containment

Increased threat of Asian carp entering the Great Lakes and spreading to other basins such as the Upper Mississippi River and Ohio River basins, has led to increased prevention and control efforts since 2010. Successful management of invasive species requires methods to contain future spread, reduce population levels, and minimize their effects. In collaboration with partners, USGS scientists have...
Learn More

Mosquito Vectors of Dengue and Zika Viruses in Hawaii National Parks

Six species of biting mosquitoes have been introduced to the Hawaiian Islands since Western contact, two of which are vectors of dengue, chikungunya, and Zika viruses. Environmental conditions favorable for the transmission of dengue and Zika occur year-long across Hawai‘i’s coastline. To better understand the ecology of vector mosquitoes and support public health efforts, mosquito monitoring at...
link

Mosquito Vectors of Dengue and Zika Viruses in Hawaii National Parks

Six species of biting mosquitoes have been introduced to the Hawaiian Islands since Western contact, two of which are vectors of dengue, chikungunya, and Zika viruses. Environmental conditions favorable for the transmission of dengue and Zika occur year-long across Hawai‘i’s coastline. To better understand the ecology of vector mosquitoes and support public health efforts, mosquito monitoring at...
Learn More

Advancing Invasive Mussel Science Through Collaboration

The Invasive Mussel Collaborative was formed in 2014 to advance scientifically sound technology for invasive mussel control to produce measurable ecological and economic benefits in the Great Lakes. A broad membership base of states, provinces, tribal and other entities and a well-organized communication network facilitates the exchange of information between scientists, managers and stakeholders...
link

Advancing Invasive Mussel Science Through Collaboration

The Invasive Mussel Collaborative was formed in 2014 to advance scientifically sound technology for invasive mussel control to produce measurable ecological and economic benefits in the Great Lakes. A broad membership base of states, provinces, tribal and other entities and a well-organized communication network facilitates the exchange of information between scientists, managers and stakeholders...
Learn More

Invasive Mussel Control Science: Management Tools for Assessing the Risks and Control of Invasive Dreissenid Species

Invasive zebra and quagga mussels (Dreissena polymorpha and D. rostriformis bugensis, respectively) are causing significant ecological and economic impacts and the scope of these impacts increases as they continue to spread across North America. The USGS conducts science to inform management actions for controlling and mitigating the impacts of invasive mussels. Studies include evaluation and...
link

Invasive Mussel Control Science: Management Tools for Assessing the Risks and Control of Invasive Dreissenid Species

Invasive zebra and quagga mussels (Dreissena polymorpha and D. rostriformis bugensis, respectively) are causing significant ecological and economic impacts and the scope of these impacts increases as they continue to spread across North America. The USGS conducts science to inform management actions for controlling and mitigating the impacts of invasive mussels. Studies include evaluation and...
Learn More

Exposure-Related Effects of Zequanox on Lake Sturgeon (Acipenser fulvescens) and lake trout (Salvelinus namaycush) Survival and Condition

A dead-cell, spray-dried powder formulation of Pseudomonas fluorescens, strain CL145A was recently approved by the US Environmental Protection Agency (EPA) for control of dreissenid mussels (zebra mussel, Dreissena polymorpha and quagga mussel, Dreissena rostriformis bugensis) in open-water environments. The EPA approved product, Zequanox® (registration number 84059-15) is manufactured by Marrone...
link

Exposure-Related Effects of Zequanox on Lake Sturgeon (Acipenser fulvescens) and lake trout (Salvelinus namaycush) Survival and Condition

A dead-cell, spray-dried powder formulation of Pseudomonas fluorescens, strain CL145A was recently approved by the US Environmental Protection Agency (EPA) for control of dreissenid mussels (zebra mussel, Dreissena polymorpha and quagga mussel, Dreissena rostriformis bugensis) in open-water environments. The EPA approved product, Zequanox® (registration number 84059-15) is manufactured by Marrone...
Learn More

Evaluation of lethal and sublethal responses of dreissenid and unionid mussels to elevated carbon dioxide

Control technology for dreissenid mussels currently relies heavily on chemical molluscicides that can be both costly and ecologically harmful. There is a need to develop more environmentally neutral control tools to manage dreissenid mussels. Carbon dioxide has shown toxicity to several species of invasive bivalves, including zebra mussels (Dreissena polymorpha) and the Asian clam (Corbicula...
link

Evaluation of lethal and sublethal responses of dreissenid and unionid mussels to elevated carbon dioxide

Control technology for dreissenid mussels currently relies heavily on chemical molluscicides that can be both costly and ecologically harmful. There is a need to develop more environmentally neutral control tools to manage dreissenid mussels. Carbon dioxide has shown toxicity to several species of invasive bivalves, including zebra mussels (Dreissena polymorpha) and the Asian clam (Corbicula...
Learn More