A native bull trout swims in the cool waters of the Flathead River near Glacier National Park, Montana. The tail end of a native Westslope cutthroat trout can be seen below.
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Bull Trout and Westslope Cutthroat Trout
A native bull trout swims in the cool waters of the Flathead River near Glacier National Park, Montana. The tail end of a native Westslope cutthroat trout can be seen below.
School of Westslope Cutthroat and Bull Trout
Native Westslope cutthroat trout and bull trout swim in the cool waters of the Flathead River near Glacier National Park, Montana.
Native Westslope cutthroat trout and bull trout swim in the cool waters of the Flathead River near Glacier National Park, Montana.
Modified Parshall Flume
Modified Parshall Flume on Heart River near South Heart, North Dakota. For more information on the use of flumes to aid in the determination of streamflow, see volumes 1 and 2 of the USGS Water Supply Paper, Measurement and Computation of Streamflow.
Modified Parshall Flume on Heart River near South Heart, North Dakota. For more information on the use of flumes to aid in the determination of streamflow, see volumes 1 and 2 of the USGS Water Supply Paper, Measurement and Computation of Streamflow.
School of Bull Trout
A school of native bull trout swims in the cool waters of the Flathead River near Glacier National Park, Montana.
A school of native bull trout swims in the cool waters of the Flathead River near Glacier National Park, Montana.
Botulism Sampling in Fish
Scientists sample fish in Lake Michigan near Sleeping Bear Dunes National Lakeshore.
Scientists sample fish in Lake Michigan near Sleeping Bear Dunes National Lakeshore.
Bat Hanging from Cave Ceiling
A healthy, banded little brown bat hangs out in a cave. Photo credit: Paul Cryan, USGS.
A healthy, banded little brown bat hangs out in a cave. Photo credit: Paul Cryan, USGS.
Louisiana's changing coastal wetlands
An aerial view of coastal marshes along Bayou Dufrene, southwest of the town of Dulac in Louisiana's Terrebonne Basin.
An aerial view of coastal marshes along Bayou Dufrene, southwest of the town of Dulac in Louisiana's Terrebonne Basin.
A bull elk with chronic wasting disease
A bull elk with chronic wasting disease at Wind Cave National Park. The emaciated appearance and drooping ears are characteristic of latter stages of infection.
A bull elk with chronic wasting disease at Wind Cave National Park. The emaciated appearance and drooping ears are characteristic of latter stages of infection.
Dead Green Winged Teal covered in algae
Picture of a dead Green Winged Teal (Anas carolinensis) covered with algae in Chesapeake Bay.
Picture of a dead Green Winged Teal (Anas carolinensis) covered with algae in Chesapeake Bay.
Algae near the shoreline in Chesapeake Bay
Algae near the shore of Poplar Island-a 3-mile-long (4.8-kilometer-long) island located on the Chesapeake Bay, part of Talbot County, Maryland.
Algae near the shore of Poplar Island-a 3-mile-long (4.8-kilometer-long) island located on the Chesapeake Bay, part of Talbot County, Maryland.
Dendronotid nudibranch on hydroids
Dendronotid nudibranch on hydroids - Scuba divers from the U.S. Geological Survey’s Western Fisheries Research Center, Washington Sea Grant, EPA and the Lower Elwha Klallam Tribe collected data and images from a long-term study of the Elwha River dam removals and the resulting effects on the nearshore ecosystem.
Dendronotid nudibranch on hydroids - Scuba divers from the U.S. Geological Survey’s Western Fisheries Research Center, Washington Sea Grant, EPA and the Lower Elwha Klallam Tribe collected data and images from a long-term study of the Elwha River dam removals and the resulting effects on the nearshore ecosystem.
Tree Growing over Stream
A tree had fallen into the Marsh River near Shelly, Minnesota, and a new shoot took off right over the river.
A tree had fallen into the Marsh River near Shelly, Minnesota, and a new shoot took off right over the river.
Prairie dog and SPV bait
In this image, a Gunnison prairie dog eats a bait laden with the sylvatic plague vaccine. Prairie dogs in the wild are less likely to succumb to plague after they ingest peanut-butter-flavored bait that contains a vaccine against the disease.
In this image, a Gunnison prairie dog eats a bait laden with the sylvatic plague vaccine. Prairie dogs in the wild are less likely to succumb to plague after they ingest peanut-butter-flavored bait that contains a vaccine against the disease.
Aphanizomenon Flos-aquae Under the Microscope
Aphanizomenon is a common bloom-forming cyanobacteria, AKA, blue-green algae. Many strains produce saxitoxin and cylindrospermopsin.
Aphanizomenon is a common bloom-forming cyanobacteria, AKA, blue-green algae. Many strains produce saxitoxin and cylindrospermopsin.
Scientist taking environmental sample during WNS surveillance
Scientist taking environmental sample during WNS surveillanceScientist taking environmental samples during white-nose syndrome surveillance activities. Lawrence County, OH. August 2012.
Scientist taking environmental sample during WNS surveillance
Scientist taking environmental sample during WNS surveillanceScientist taking environmental samples during white-nose syndrome surveillance activities. Lawrence County, OH. August 2012.
Water- Control Structure on Lake Erie
Constructed water-control structure connecting a managed pool to Crane Creek wetland (Lake Erie). Structure allows critical fish passage between Lake Erie and the previously diked wetland.
Constructed water-control structure connecting a managed pool to Crane Creek wetland (Lake Erie). Structure allows critical fish passage between Lake Erie and the previously diked wetland.
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.
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.Biologists 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.
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.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.
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.Biologists 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.
Gull Necropsy
USGS AMBLE coordinator Jenny Chipault inspects a ring-billed gull submitted for avian botulism type E testing. Some sick and dead gulls found on Lake Michigan beaches in 2011 had avian botulism.
USGS AMBLE coordinator Jenny Chipault inspects a ring-billed gull submitted for avian botulism type E testing. Some sick and dead gulls found on Lake Michigan beaches in 2011 had avian botulism.
Set up to capture bats for white-nose syndrome surveillance activities
Set up to capture bats for white-nose syndrome surveillance activitiesMist-net and harp trap set up to capture bats for white-nose syndrome surveillance activities. Breckinridge County, KY. July 2012.
Set up to capture bats for white-nose syndrome surveillance activities
Set up to capture bats for white-nose syndrome surveillance activitiesMist-net and harp trap set up to capture bats for white-nose syndrome surveillance activities. Breckinridge County, KY. July 2012.
Scientist taking environmental samples during WNS surveillance
Scientist taking environmental samples during WNS surveillanceScientist taking environmental samples during white-nose syndrome surveillance activities. Breckinridge County, IN. July 2012.
Scientist taking environmental samples during WNS surveillance
Scientist taking environmental samples during WNS surveillanceScientist taking environmental samples during white-nose syndrome surveillance activities. Breckinridge County, IN. July 2012.
Scientist taking a skin swab sample to test for presence of Pd
Scientist taking a skin swab sample to test for presence of PdScientist taking a skin swab sample to test for presence of Pd. Monroe County, IN. July 18, 2012.
Scientist taking a skin swab sample to test for presence of Pd
Scientist taking a skin swab sample to test for presence of PdScientist taking a skin swab sample to test for presence of Pd. Monroe County, IN. July 18, 2012.