Chinook salmon restrained in a cradle after non-lethal muscle biopsy sample collection for heat stress assessment at a subsistence fish wheel in the Yukon River during July 2017. The muscle biopsy location looks like one of the black spots on the back of the fish.
Images
Browse images from a wide range of science topics covered by USGS. All items in this gallery are considered public domain unless otherwise noted.
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Chinook salmon muscle biopsy
Chinook salmon restrained in a cradle after non-lethal muscle biopsy sample collection for heat stress assessment at a subsistence fish wheel in the Yukon River during July 2017. The muscle biopsy location looks like one of the black spots on the back of the fish.
Melanistic Common Murre on Gull Island
A melanistic (all dark) Common Murre stands near the base of the Gull Island breeding colony in Kachemak Bay, Alaska, 2017. See related paper published in the Marine Ornithology: Journal of Seabird Research and Conservation at: http://www.marineornithology.org/PDF/50_2/50_2_225-227.pdf.
A melanistic (all dark) Common Murre stands near the base of the Gull Island breeding colony in Kachemak Bay, Alaska, 2017. See related paper published in the Marine Ornithology: Journal of Seabird Research and Conservation at: http://www.marineornithology.org/PDF/50_2/50_2_225-227.pdf.
A Common Murre holding a juvenile Pacific Herring at its colony
A Common Murre holding a juvenile Pacific Herring at its colonyA Common Murre holding a juvenile Pacific Herring at its colony on Gull Island, Cook Inlet on July 3, 2017.
A Common Murre holding a juvenile Pacific Herring at its colony
A Common Murre holding a juvenile Pacific Herring at its colonyA Common Murre holding a juvenile Pacific Herring at its colony on Gull Island, Cook Inlet on July 3, 2017.
Male Wilson's Warbler on the Seward Peninsula, Alaska
Male Wilson's Warbler on the Seward Peninsula, AlaskaMale Wilson's Warbler on the Seward Peninsula, Alaska. This photo was taken on the Seward Peninsula as part of the Changing Arctic Ecosystem Boreal-Arctic Transition Zone program.
Male Wilson's Warbler on the Seward Peninsula, Alaska
Male Wilson's Warbler on the Seward Peninsula, AlaskaMale Wilson's Warbler on the Seward Peninsula, Alaska. This photo was taken on the Seward Peninsula as part of the Changing Arctic Ecosystem Boreal-Arctic Transition Zone program.
Male Wilson's Warbler in a shrub on the Seward Peninsula, Alaska
Male Wilson's Warbler in a shrub on the Seward Peninsula, AlaskaMale Wilson's Warbler. This photo was taken on the Seward Peninsula as part of the Changing Arctic Ecosystem Boreal-Arctic Transition Zone program.
Male Wilson's Warbler in a shrub on the Seward Peninsula, Alaska
Male Wilson's Warbler in a shrub on the Seward Peninsula, AlaskaMale Wilson's Warbler. This photo was taken on the Seward Peninsula as part of the Changing Arctic Ecosystem Boreal-Arctic Transition Zone program.
An aerial view of McKinley Lake, outside of Cordova, Alaska
An aerial view of McKinley Lake, outside of Cordova, AlaskaMcKinley Lake, outside of Cordova, Alaska. This is the site of deployment of limnocorrals for an Elodea spp. experiment.
An aerial view of McKinley Lake, outside of Cordova, Alaska
An aerial view of McKinley Lake, outside of Cordova, AlaskaMcKinley Lake, outside of Cordova, Alaska. This is the site of deployment of limnocorrals for an Elodea spp. experiment.
Reseach vessel Ocean Starr
Research vessel Ocean Starr in Alaska.
Seismic survey of the Queen Charlotte Fault
USGS scientists deploy a seismic streamer aboard the R/V David Starr offshore of southeast Alaska to study the Queen Charlotte Fault.
USGS scientists deploy a seismic streamer aboard the R/V David Starr offshore of southeast Alaska to study the Queen Charlotte Fault.
Darby Mountain outcrop of quartz monzonite
Looking east past a typical Darby Mountain outcrop of quartz monzonite towards the contact between the pluton and Paleozoic marbles
Looking east past a typical Darby Mountain outcrop of quartz monzonite towards the contact between the pluton and Paleozoic marbles
Geologist examines rocks at Darby Pluton, AK
USGS Geologist George Case examines granitic rocks in preparation for collecting samples for geochemistry and geochronology near the Boulder Creek prospect at the north end of the Darby pluton on the eastern Seward Peninsula.
USGS Geologist George Case examines granitic rocks in preparation for collecting samples for geochemistry and geochronology near the Boulder Creek prospect at the north end of the Darby pluton on the eastern Seward Peninsula.
Potassium feldspar phenocrysts in syenite
Stretched phenocrysts of potassium feldspar in syenite of the Kachauik pluton on the Bering Sea coast of the southeastern Seward Peninsula.
Stretched phenocrysts of potassium feldspar in syenite of the Kachauik pluton on the Bering Sea coast of the southeastern Seward Peninsula.
Lone male Yellow Warbler on the Seward Peninsula, Alaska
Lone male Yellow Warbler on the Seward Peninsula, AlaskaLone male Yellow Warbler on the Seward Peninsula, Alaska. This photo was taken on the Seward Peninsula as part of the Changing Arctic Ecosystem Boreal-Arctic Transition Zone program.
Lone male Yellow Warbler on the Seward Peninsula, Alaska
Lone male Yellow Warbler on the Seward Peninsula, AlaskaLone male Yellow Warbler on the Seward Peninsula, Alaska. This photo was taken on the Seward Peninsula as part of the Changing Arctic Ecosystem Boreal-Arctic Transition Zone program.
Elim village children explore beach outcrops with USGS geologists
Elim village children explore beach outcrops with USGS geologistsUSGS geologists (Andy Allard, Beth Drewes-Todd and Alan Pongratz) investigating the rocks exposed on the beaches near the village of Elim with the trusty local guides and eager budding geologists.
Elim village children explore beach outcrops with USGS geologists
Elim village children explore beach outcrops with USGS geologistsUSGS geologists (Andy Allard, Beth Drewes-Todd and Alan Pongratz) investigating the rocks exposed on the beaches near the village of Elim with the trusty local guides and eager budding geologists.
Flooding stream in a permafrost landscape, Kobuk Valley National Park
Flooding stream in a permafrost landscape, Kobuk Valley National ParkA flooding stream meanders through a permafrost landscape in Kobuk Valley National Park, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks because they lie in a region
Flooding stream in a permafrost landscape, Kobuk Valley National Park
Flooding stream in a permafrost landscape, Kobuk Valley National ParkA flooding stream meanders through a permafrost landscape in Kobuk Valley National Park, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks because they lie in a region
Joel Schmutz with an Emperor Goose
Joel Schmutz holding an Emperor Goose
Joel Schmutz holding an Emperor Goose
Glaucous-winged gull in water in Kenai River, Alaska
Glaucous-winged gull in water in Kenai River, AlaskaGlaucous-winged gull in water in Kenai River, Kenai, Alaska
Glaucous-winged gull in water in Kenai River, Alaska
Glaucous-winged gull in water in Kenai River, AlaskaGlaucous-winged gull in water in Kenai River, Kenai, Alaska
Investigating a marine terrace along the Fairweather Fault
Investigating a marine terrace along the Fairweather FaultUSGS scientists Kate Scharer, Richard Lease, and Adrian Bender excavate a marine terrace elevated tens of meters above sea level on the west side of the Fairweather Fault. Location: Icy Point, Glacier Bay National Park, Alaska.
Investigating a marine terrace along the Fairweather Fault
Investigating a marine terrace along the Fairweather FaultUSGS scientists Kate Scharer, Richard Lease, and Adrian Bender excavate a marine terrace elevated tens of meters above sea level on the west side of the Fairweather Fault. Location: Icy Point, Glacier Bay National Park, Alaska.
River terraces elevated along the Fairweather Fault
River terraces elevated along the Fairweather FaultUSGS scientists Richard Lease and Adrian Bender examine river terraces elevated tens of meters above the modern channel level on the west side of the Fairweather Fault. Location: Kaknau Creek, Icy Point, Glacier Bay National Park, Alaska.
River terraces elevated along the Fairweather Fault
River terraces elevated along the Fairweather FaultUSGS scientists Richard Lease and Adrian Bender examine river terraces elevated tens of meters above the modern channel level on the west side of the Fairweather Fault. Location: Kaknau Creek, Icy Point, Glacier Bay National Park, Alaska.
Common Murres at breeding colony, Alaska-close up of egg
Common Murres at breeding colony, Alaska-close up of eggCommon Murres at their breeding colony on Gull Island, Kachemak Bay, Alaska. One of the murres standing next to egg.
Common Murres at breeding colony, Alaska-close up of egg
Common Murres at breeding colony, Alaska-close up of eggCommon Murres at their breeding colony on Gull Island, Kachemak Bay, Alaska. One of the murres standing next to egg.
Kasilof River bridge
Kasilof River bridge
Black-capped Chickadee with a deformed crossed beak
Black-capped Chickadee with a deformed crossed beakA Black-capped Chickadee with a beak that has grown long and crossed
Black-capped Chickadee with a deformed crossed beak
Black-capped Chickadee with a deformed crossed beakA Black-capped Chickadee with a beak that has grown long and crossed