Skip to main content
U.S. flag

An official website of the United States government

Fish and Aquatic Species Conservation

Filter Total Items: 72

Imperiled Species Detection and Monitoring

It is difficult to evaluate the presence or abundance of many imperiled species. Low numbers, cryptic behaviors or habitats that are difficult to search can combine to make it difficult for a researcher to detect and monitor species and population changes. Wildlife and Fisheries researchers are applying research tools from molecular science to attempt to better understand and evaluate these...
link

Imperiled Species Detection and Monitoring

It is difficult to evaluate the presence or abundance of many imperiled species. Low numbers, cryptic behaviors or habitats that are difficult to search can combine to make it difficult for a researcher to detect and monitor species and population changes. Wildlife and Fisheries researchers are applying research tools from molecular science to attempt to better understand and evaluate these...
Learn More

Northeast Amphibian Research and Monitoring Initiative

The USGS Amphibian Research and Monitoring Initiative (ARMI) is designed to determine where populations of amphibians are present, to monitor specific apex populations, and to investigate potential causes of amphibian declines, diseases, and malformations. The Northeast Region of ARMI encompasses thirteen states (Connecticut, Delaware, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New...
link

Northeast Amphibian Research and Monitoring Initiative

The USGS Amphibian Research and Monitoring Initiative (ARMI) is designed to determine where populations of amphibians are present, to monitor specific apex populations, and to investigate potential causes of amphibian declines, diseases, and malformations. The Northeast Region of ARMI encompasses thirteen states (Connecticut, Delaware, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New...
Learn More

Warm Freshwater Ecosystems

These systems are characterized as 4th order and larger nontidal riverine systems, which includes many of the intermediate and larger size rivers, such as the Penobscot, Connecticut, Hudson, Delaware, and Susquehanna Rivers and their larger tributaries of the northeastern U.S. Fish passage, thermal stress, and ecological flows are likely important issues in these systems. Fish health issues and...
link

Warm Freshwater Ecosystems

These systems are characterized as 4th order and larger nontidal riverine systems, which includes many of the intermediate and larger size rivers, such as the Penobscot, Connecticut, Hudson, Delaware, and Susquehanna Rivers and their larger tributaries of the northeastern U.S. Fish passage, thermal stress, and ecological flows are likely important issues in these systems. Fish health issues and...
Learn More

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...
link

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...
Learn More

Freshwater Mussel Physiology

Freshwater mussels are considered ecosystems engineers benefiting the streams and rivers they inhabit through filtration, biodeposition, and nutrient cycling, thereby influencing water quality. However, many of these species are rapidly declining due to shifting environmental conditions and habitat loss. Researchers at Leetown Science Center are evaluating how different species of mussels respond...
link

Freshwater Mussel Physiology

Freshwater mussels are considered ecosystems engineers benefiting the streams and rivers they inhabit through filtration, biodeposition, and nutrient cycling, thereby influencing water quality. However, many of these species are rapidly declining due to shifting environmental conditions and habitat loss. Researchers at Leetown Science Center are evaluating how different species of mussels respond...
Learn More

Fish Passage

A major focus of USGS-LSC is the design and evaluation of state-of the-art upstream and downstream fish passage structures for hydropower facilities of different sizes and locations and for different fish species, including endangered sturgeons and Atlantic salmon. Performance, physiology, behavior and energetics of each fish species are tested in-house for each design.
link

Fish Passage

A major focus of USGS-LSC is the design and evaluation of state-of the-art upstream and downstream fish passage structures for hydropower facilities of different sizes and locations and for different fish species, including endangered sturgeons and Atlantic salmon. Performance, physiology, behavior and energetics of each fish species are tested in-house for each design.
Learn More

Fish Physiology

Physiological demands are especially important to anadromous fish because of their need to move between freshwater and seawater and to make long, often difficult migrations. These demands can become critical when barriers to migration and other changes in river ecosystems occur. We are particularly interested in how environmental change, both of 'natural' and 'human' origins, affects normal growth...
link

Fish Physiology

Physiological demands are especially important to anadromous fish because of their need to move between freshwater and seawater and to make long, often difficult migrations. These demands can become critical when barriers to migration and other changes in river ecosystems occur. We are particularly interested in how environmental change, both of 'natural' and 'human' origins, affects normal growth...
Learn More

Fish Behavior

Recent discoveries of the extent of sturgeon movement in the Gulf of Maine combined with relicensing and water use issues in the Connecticut River demand closer evaluation of shortnose and Atlantic sturgeon migration and behavior patterns. Through field collaboration with state, federal, university and military institutions LSC-Conte scientists work to define the significance of pre-spawning...
link

Fish Behavior

Recent discoveries of the extent of sturgeon movement in the Gulf of Maine combined with relicensing and water use issues in the Connecticut River demand closer evaluation of shortnose and Atlantic sturgeon migration and behavior patterns. Through field collaboration with state, federal, university and military institutions LSC-Conte scientists work to define the significance of pre-spawning...
Learn More

The West Brook Story

Natural systems, like rivers and streams, are remarkably complex, with many interacting parts. Data visualization tools make understanding and communicating complex ecological processes easier. Effective visualizations help users learn about patterns in data and how models work. Interactive visualizations are particularly useful, as they let users explore data and develop a personal understanding...
link

The West Brook Story

Natural systems, like rivers and streams, are remarkably complex, with many interacting parts. Data visualization tools make understanding and communicating complex ecological processes easier. Effective visualizations help users learn about patterns in data and how models work. Interactive visualizations are particularly useful, as they let users explore data and develop a personal understanding...
Learn More

Fish Ecology

Our goal is to identify the factors that govern population dynamics. Emphasis is on an integrative approach, combining field and laboratory studies to provide data for mathematical models of ecological and evolutionary dynamics. We focus on the fish that live in streams; how environmental variation, barriers to movement, and landscape characteristics influence changes in abundance over time and...
link

Fish Ecology

Our goal is to identify the factors that govern population dynamics. Emphasis is on an integrative approach, combining field and laboratory studies to provide data for mathematical models of ecological and evolutionary dynamics. We focus on the fish that live in streams; how environmental variation, barriers to movement, and landscape characteristics influence changes in abundance over time and...
Learn More

Fish Biomechanics

Biomechanics is the study of mechanical laws relating to the movement of living organisms. In regards to fish, biomechanics pertains to the body shape of different species and the various structures of fish muscles, fins, etc. The biomechanics of a fish impact its swimming performance which in turn affects its ability to surpass barriers to movement. Understanding the biomechanical drivers of...
link

Fish Biomechanics

Biomechanics is the study of mechanical laws relating to the movement of living organisms. In regards to fish, biomechanics pertains to the body shape of different species and the various structures of fish muscles, fins, etc. The biomechanics of a fish impact its swimming performance which in turn affects its ability to surpass barriers to movement. Understanding the biomechanical drivers of...
Learn More

Stream salamanders in Shenandoah National Park: Movement and survival of stream salamander populations

Research in population biology is concerned with factors affecting the change in a population over time, including births, deaths, immigration and emigration. Despite the potential importance of immigration and emigration, empirical data on movement patterns are lacking in many systems.
link

Stream salamanders in Shenandoah National Park: Movement and survival of stream salamander populations

Research in population biology is concerned with factors affecting the change in a population over time, including births, deaths, immigration and emigration. Despite the potential importance of immigration and emigration, empirical data on movement patterns are lacking in many systems.
Learn More