The pallid sturgeon is an endangered riverine sturgeon with historical distribution restricted to parts of the Yellowstone, Missouri, Mississippi, and Atchafalaya Rivers. Although rare, pallid sturgeon in the lower Mississippi River appear to be naturally recruiting, and information about habitat use is important to conserve this species.
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Pallid Sturgeon
The pallid sturgeon is an endangered riverine sturgeon with historical distribution restricted to parts of the Yellowstone, Missouri, Mississippi, and Atchafalaya Rivers. Although rare, pallid sturgeon in the lower Mississippi River appear to be naturally recruiting, and information about habitat use is important to conserve this species.
Pallid sturgeon
The Bureau of Reclamation (USBR) initiated a study on how its water operations influence fishes in the Missouri River basin above Fort Peck Reservoir. Of utmost concern is the effect of these operations on the spawning success and recruitment of endangered pallid sturgeon.
The Bureau of Reclamation (USBR) initiated a study on how its water operations influence fishes in the Missouri River basin above Fort Peck Reservoir. Of utmost concern is the effect of these operations on the spawning success and recruitment of endangered pallid sturgeon.
Southeastern myotis
A southeastern myotis (Myotis austroriparius) that was caught while mist netting at Cypress Creek National Wildlife Refuge in the summer of 2015.
A southeastern myotis (Myotis austroriparius) that was caught while mist netting at Cypress Creek National Wildlife Refuge in the summer of 2015.
Assessment of the Invasion of the Asian Swamp Eel
The Asian swamp eel is an invasive species that was introduced into the Chattahoochee River National Recreation Area and has persisted for more than 20 years.
The Asian swamp eel is an invasive species that was introduced into the Chattahoochee River National Recreation Area and has persisted for more than 20 years.
Mark J. Henderson
Mark Henderson recently started as the Unit Leader for the USGS Vermont Cooperative Fish and Wildlife Research Unit at the University of Vermont. Prior to joining the Vermont Cooperative Research Unit, he was the acting unit leader at the California Cooperative Research Unit for six years.
Mark Henderson recently started as the Unit Leader for the USGS Vermont Cooperative Fish and Wildlife Research Unit at the University of Vermont. Prior to joining the Vermont Cooperative Research Unit, he was the acting unit leader at the California Cooperative Research Unit for six years.
Graduate student kayaking at Glacier National Park researching bull trout
This project is designed to assess the feasibility of "rescuing" specific genetic lineages of bull trout from likely extirpation in three imperiled major lake drainages in GNP, through translocation of drainage-specific stocks into lakes located above barrier falls within parental drainages.
This project is designed to assess the feasibility of "rescuing" specific genetic lineages of bull trout from likely extirpation in three imperiled major lake drainages in GNP, through translocation of drainage-specific stocks into lakes located above barrier falls within parental drainages.
Niskin bottle
Black tape is stretched across the stopper of the 'Niskin' bottle and secured to form a positive pressure seal.
Black tape is stretched across the stopper of the 'Niskin' bottle and secured to form a positive pressure seal.
Masters student Lila Warren documented that muskellunge in her study rivers were reproducing all by themselves and hatchery fish, in all likelihood, do not need to be stocked to sustain the fishery.
linkBiologists in North America have been studying the effectiveness of fish stocking programs ever since fish were artificially spawned, reared, and stocked in the late 1800s.
Masters student Lila Warren documented that muskellunge in her study rivers were reproducing all by themselves and hatchery fish, in all likelihood, do not need to be stocked to sustain the fishery.
linkBiologists in North America have been studying the effectiveness of fish stocking programs ever since fish were artificially spawned, reared, and stocked in the late 1800s.
Graduate student holds a pallid sturgeon
Graduate student holds a pallid sturgeon. The goal of this study is to assess latitudinal variation in growth rates of pallid sturgeon and shovelnose sturgeon and determine how those rates are affected by diet and temperature.
Graduate student holds a pallid sturgeon. The goal of this study is to assess latitudinal variation in growth rates of pallid sturgeon and shovelnose sturgeon and determine how those rates are affected by diet and temperature.
USGS Montana Fishery Research Unit research vessel and white truck
Research of the Montana Cooperative Fishery Research Unit will continue to focus on applied fisheries-management problems and issues. Our studies are initiated in response to the needs of the Cooperators and other management agencies and are designed to provide information useful in directly improving management of aquatic resources.
Research of the Montana Cooperative Fishery Research Unit will continue to focus on applied fisheries-management problems and issues. Our studies are initiated in response to the needs of the Cooperators and other management agencies and are designed to provide information useful in directly improving management of aquatic resources.
Lila Warren holds a microtagged muskellunge fish
Lila Warren at the USGS Tennessee Cooperative Fishery Research Unit holds a muskellunge fish. To prevent the disappearance of muskellunge from the Cumberland Plateau, the Tennessee Wildlife Resources Agency (TWRA) began stocking muskellunge into the upper Caney Fork River system above Great Falls Dam in 1976.
Lila Warren at the USGS Tennessee Cooperative Fishery Research Unit holds a muskellunge fish. To prevent the disappearance of muskellunge from the Cumberland Plateau, the Tennessee Wildlife Resources Agency (TWRA) began stocking muskellunge into the upper Caney Fork River system above Great Falls Dam in 1976.
Passage of adult Atlantic salmon in the Penobscot River, Maine
Atlantic salmon runs in the Penobscot and Kennebec Rivers of Maine are federally endangered and remain low. Inefficient fishways at dams continue to slow and prevent upstream migrations to spawning habitat, and delays of weeks to months are common. These delays expose fish to elevated water temperatures, resulting in increased metabolic demands.
Atlantic salmon runs in the Penobscot and Kennebec Rivers of Maine are federally endangered and remain low. Inefficient fishways at dams continue to slow and prevent upstream migrations to spawning habitat, and delays of weeks to months are common. These delays expose fish to elevated water temperatures, resulting in increased metabolic demands.
Ryan Gary holding a paddlefish in Oklahoma
Ryan’s thesis research focuses on the importance of appropriate spawning substrate as a key driver of paddlefish restoration success in reservoirs of Oklahoma. Paddlefish, an important sportfish, have been stocked in reservoirs throughout the State, but these stocking efforts have had variable success.
Ryan’s thesis research focuses on the importance of appropriate spawning substrate as a key driver of paddlefish restoration success in reservoirs of Oklahoma. Paddlefish, an important sportfish, have been stocked in reservoirs throughout the State, but these stocking efforts have had variable success.