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  • Jeff Wenciker and Zachary Spence, US Coast Guard science technicians, lower a CTD in to the Arctic Ocean for water sampling.
    D230807.jpg
  • Greg Durner, USGS Alaska Science Center, surveying the range of denning polar bears in the Arctic National WIldlife Refuge. Alaska
    D00029394.jpg
  • Geoff York, USGS biologist, and Katrina Knott, research assistant, collect data from a polar bear (Ursus maritimus) on the Beaufort Sea ice. Kaktovik, Alaska
    D123694.jpg
  • USGS polar bear team preparing for a day of polar bear research. Kaktovik, Alaska
    D125081.jpg
  • Dr. Steve Amstrup, USGS bioogist, analyzing data from recent polar bear captures at the U.S. Fish and Wildlife house in Kaktovik, Alaska.
    D125070.jpg
  • A female polar bear with a newly painted identifying number on her back and a radio collar around her neck, stands in a groggy disoriented state. She has just emerged from an immobilizing drug used by USGS biologist Steven Amstrup. The number is used to identify the bear from the air so she is not captured again that same year. The number wears off after a couple of weeks.
    D123598.jpg
  • Dr Amstrup prepares to attach a GPS satellite tracking collar to an immobilized polar bear on the Beaufort Sea. The collars are placed on females exclusively since the necks of males get too large for them to work properly. The collars are a high tech way to follow these animals far out onto the ice where humans can't go. The bears are tracked by satellites which helps the scientists determine the home range of individual animals and other details about a particular bear's life such as length of time spent resting or hunting in one area.
    D171752.jpg
  • A polar bear (Ursus maritimus) makes tracks in the snow. These tracks are important for being able to find the bears on the ice for darting and capturing for scientific research.
    D125949.jpg
  • BJ, Krista, and Nick hauling the remote camera for deployment near a polar bear den site. Svalbard, Norway
    D1331803.jpg
  • John Whiteman displays the Ibutton Thermochron deep core body temperature device that is implanted into polar bears for long-term body temperature data.
    D228018.jpg
  • A female polar bear (Ursus maritimus) dazed and weak from an immobilizing drug she received from Dr. Steve Amstrup, USGS biologist. Beaufrot Sea ice pack, Kaktovik, Alaska
    D125577.jpg
  • Dr. Steve Amstrup, leaning from a moving helicopter, takes careful aim with his dart gun used to inject an immobilizing drug into a polar bear. Beaufort Sea ice pack, Kaktovik, Alaska
    D125722.jpg
  • Steve Amstrup and Geoff York, USGS biologists, taking field data from an immobilized large male polar bear (Ursus maritimus). Kaktovik, Alaska
    D123987.jpg
  • Daniel Whiting and Dawn Sechler check the water collection device called a CTD (Conductivity, Temperature, and Depth) used for collecting water samples from the Arctic Ocean.
    D229911.jpg
  • Brenna McConnell, Metta Kaufman, and Cristina Galvan working on ice core samples from the Arctic Ocean.
    D230236.jpg
  • Mette Kaufman pulls up an ice core sample. Arctic Ocean
    D230254.jpg
  • A lead in the winter ice of the Beaufort Sea Ice pack. Kaktovik, Alaska
    D125871.jpg
  • Dr. Steve Amstrup, lead biologist for the USGS polar bear capture project, instructing a co-worker on the fine points of shooting a dart gun at a running polar bear from a moving helicopter. Kaktovik, Alaska
    D125196.jpg
  • Dr. Steve Amstrup, USGS biologist, and assistant Karyn Rode preparing to collect data from a small female polar bear (Ursus maritimus). Beaufort Sea ice pack, Kaktovik, Alaska
    D125131.jpg
  • Steve Amstrup and Geoff York, USGS biologists, taking field data from a large, immobilized male polar bear (Ursus maritimus). Kaktovik, Alaska
    D123954.jpg
  • Broken ice in the Beaufort Sea. Arctic Ocean
    D233036.jpg
  • The icebreaker Polar Sea in the arctic pack ice of the Beaufort Sea.
    D233153.jpg
  • Broken ice in the Beaufort Sea. Arctic Ocean
    D233132.jpg
  • USGS biologist Dr. Steve Amstrup and assistant Karyn Rode attempt to lift a small 365 pound female polar bear on the Beaufort Sea ice pack.
    D125184.jpg
  • A polar bear (Ursus Maitimus) makes its way over the rugged ice of the Beaufort Sea in Kaktovik, Alaska.
    D123494.jpg
  • Ice breaking apart during late April on the Beaufort Sea. Kaktovik, Alaska
    D123486.jpg
  • Daniel Cox with his remote camera outside the helicopter. Beaufort Sea, Alaska
    D171949.jpg
  • A female polar bear (Ursus maritimus) darted and weak from an immobilizing drug she received from Dr. Steve Amstrup, USGS biologist. Beaufort Sea, Alaska
    D125585.jpg
  • Geoff York, USGS biologist, takes a blood sample of a darted polar bear. Kaktovik, Alaska
    D123567.jpg
  • The Beaufort Sea ice pack breaks into chunks during late April 2007.
    D123493.jpg
  • Polar Bear (Ursus maritimus) a large male lies immobilized on the ice as Dr. Steven Amstrup and his assistant head for a female that was darted at the same time and is down on the ice. Beaufort Sea, Alaska
    D170397.jpg
  • A polar bear (Ursus maritimus) with an immobilizA polar bear (Ursus maritimus) makes tracks in the snow. these tracks are important for being able to find the bears on the ice for darting and capture.ing dart in it's side makes tracks in the snow. These tracks are important for being able to find the bears on the ice for darting and capture.
    D125422.jpg
  • Dr. Steve Amstrup, USGS biologist weighing a large, male polar bear weighing 944 lbs.  on the Beaufort Sea ice pack.
    D124966.jpg
  • A polar bear (Ursus maritimus) lies spread out over the ice of the Beaufort Sea. He's immobilized from a tranquilizer and on the verge of waking after USGS biologists have just performed their field tests on him. Kaktovik, Alaska
    D123807.jpg
  • Steve Amstrup and Geoff York, USGS biologists, taking blood from an immobilized large male polar bear.
    D123997.jpg
  • A polar bear (Ursus maritimus) makes its way across the Beaufort Sea Ice pack. Kaktovik, Alaska
    D125880.jpg
  • Steve Amstrup, lead USGS biologist, and assistant Karyn Rode, taking field data from an immobilized large male polar bear (Ursus maritmus). Kaktovik, Alaska
    D125246.jpg
  • Dr Steven Amstrup collects data from a polar bear on the Beaufort Sea, Alaska.
    D171516.jpg
  • On the trail home after deploying a remote camera on a polar bear den site. Svalbard, Norway.
    D1481114.jpg
  • Making final adjustments on the remote camera set out to document a polar bear den site. Svalbard, Norway.
    D1481108.jpg
  • Latching down gear onto the sled for our trip home. Svalbard, Norway
    D1481081.jpg
  • Latching gear onto the sled for our trip home. Svalbard, Norway
    D1481067.jpg
  • Strapping down the gear for our trip back to Longyearbyen, Svalbard, Norway.
    D1480781.jpg
  • Setting up the remote camera on a polar bear den site. Svalbard, Norway
    D1480771.jpg
  • Maternal Den Study team in the field. Svalbard, Norway
    D1480979.jpg
  • The Maternal Den Study team setting up a remote camera for observing a polar bear den from a great distance. Svalbard, Norway
    D1331596.jpg
  • BJ Kirschhoffer and Krista Wright unload materials used for the deployment of remote cameras for the Maternal Den Study. Svalbard, Norway
    D1332020.jpg
  • The Maternal Den Study team setting up a remote camera for observing a polar bear den from a great distance. Svalbard, Norway
    D1331757.jpg
  • Shawn Harper holds a dive line for a fellow diver while the Polar Sea Icebreaker waits for their return. Arctic Ocean
    D230046.jpg
  • Metta Kaufman and Brenna McConnell from the University of Alaska, Fairbanks, taking ice core samples from the Arctic Ocean.
    D230211.jpg
  • Merav Ben David holds up two vials of blood, one taken from a mother polar bear and the other from her cub. Arrctic Ocean
    D228402.jpg
  • Pam Coy stands in a bear den and assists in removing an immobilized black bear (Ursus americanus) for reserach data. Minnesota
    00471-12604.jpg
  • Dr. Steve Amstrup, USGS biologist, and Daniel Cox use a weight bar to lift and weigh a small, 365-pound female polar bear. Beaufort Sea
    D125192.jpg
  • The polar bear capture team collects data from a female polar bear and her cub. Arctic Ocean
    D228347.jpg
  • Polar bear shot with a dart filled with an immobilizing drug. The bear is showing signs of ataxia. Beaufort Sea, Alaska
    D172180.jpg
  • Dr. Steven Amstrup shows the canines of a polar bear. Beaufort Sea, Alaska
    D170980.jpg
  • Geoff York a USGS biologist, prepares a radio collar while Katrina Knott, research assistant, painting an ID number on the back of a polar bear. The ID number is to make it easy to see from the air that the bear was captured already. Kaktovik, Alaska
    D123739.jpg
  • Dr Steven Amstrup collects data from a polar bear on the Beaufort Sea, Alaska.
    D171504.jpg
  • Broken ice in the Beaufort Sea. Arctic Ocean
    D233059.jpg
  • Shawn Harper and Kelly Nolan cut a triangle hole in the ice for dives beneath the Arctic Ocean ice pack.
    D230826.jpg
  • John Whiteman cuts open the IButtone Thermochron, a deep core body temperature device that was removed from polar bear #21045. Arctic Ocean
    D230492.jpg
  • Blood samples from a polar bear. Polar Sea icebreaker, Arctic Ocean
    D230431.jpg
  • Mette Kaufman pulls up an ice core sample. Arctic Ocean
    D230252.jpg
  • Shawn Harper and Katrin Iken prepares to dive in the ARctic Ocean.
    D230244.jpg
  • Metta Kaufman and Brenna McConnell from the University of Alaska, Fairbanks, taking ice core samples from the ice of the Arctic Ocean.
    D230205.jpg
  • Metta Kaufman and Brenna McConnell from the University of Alaska, Fairbanks, taking ice core samples from the ice of the Arctic Ocean.
    D230192.jpg
  • Heloise Chenelot waits for help to exit the ice hole she's been diving in. Arctic Ocean
    D230061.jpg
  • Richard Morris and Heloise Chenelot prepare to go beneath the surface of the ice of the Arctic Ocean.
    D230048.jpg
  • Dan Whiting and Dawn Sechler checking the Flow Through Incubation experiment used to identify how additional sunlight through lack of sea ice cover will affect microscopic life in the Arctic Ocean.
    D227749.jpg
  • Dan Whiting and Dawn Sechler checking the Flow Through Incubation experiment used to identify how additional sunlight through lack of sea ice cover will affect microscopic life in the Arctic Ocean.
    D227748.jpg
  • Newly formed ice covers the waters of the Arctic Ocean.
    D227187.jpg
  • Dr. Steve Amstrup weighs a polar bear on the Beaufort Sea, Alaska.
    D171484.jpg
  • Polar bear (Ursus maritimus) hind foot, paw. Kaktovik, Alaska
    D124525.jpg
  • A radio-collared polar bear makes its way across the broken ice pack of the Beaufort Sea. Arctic Ocean
    D232980.jpg
  • John Whiteman with the IButton Thermochron, deep core body temperature device that was removed from polar bear #21045. Arctic Ocean
    D230466.jpg
  • A large male polar bear, sedated from an immobilizing drug, runs from the capture helicopter on the Beaufort Sea ice pack.
    D125308.jpg
  • The sun sets over broken chunks of newly forming ice in the Arctic Ocean.
    D230313.jpg
  • D172383.jpg
  • Dr. Steven Amstrup digs up the body of a female polar bear he tracked with a radio collar. He was unsure of caused her death. She was buried over by sand from ocean waves along the coast of the Beaufort Sea, .Alaska.
    D172322.jpg
  • Ringed Seal (Pusa hispida) a baby seal lies dead in the snow. Beaufort Sea, Alaska
    D172269.jpg
  • Polar Bear (Ursus maritimus) a lone bear on the sea ice of the Beaufort Sea, Alaska
    D172261.jpg
  • Ringed Seal (Pusa hispida) in the ice. This scene shows where a polar bear has enerred one of th holes in the foreground and then swam the the far hole, about 100 yards, at the top of the frame and reemerged .
    D172243.jpg
  • Polar Bear (Ursus maritimus) a lone bear on the sea ice of the Beaufort Sea, Alaska(Ursus maritimus) a
    D172126.jpg
  • Dr Steven Amstrup leans out of a flying helicopter to shoot an immobilizing drug into a polar bear. Beaufort Sea, Alaska.
    D172014.jpg
  • Polar Bear (Ursus maritimus) tracks on the ice of the Beaufort Sea, Alaska
    D171944.jpg
  • Ice scapes on the pack ice of the Beaufort Sea, Alaska
    D171939.jpg
  • Jumbled ice from pressure ridges on the ice pack of the Beaufort Sea, Alaska
    D171912.jpg
  • Polar Bear (Ursus maritimus) tracks on the ice of the Beaufort Sea, Alaska
    D171905.jpg
  • Polar Bear (Ursus maritimus) tracks on the ice of the Beaufort Sea, Alaska
    D171897.jpg
  • Polar Bear (Ursus maritimus) tracks on the ice of the Beaufort Sea, Alaska
    D171889.jpg
  • Bearded seal (Erignathus barbatus) lies near its hole on the Beaufort Sea ice pack. Alaska
    D171822.jpg
  • Bearded seal (Erignathus barbatus) lies near its hole on the Beaufort Sea ice pack. Alaska
    D171819.jpg
  • Common Eiders (Somateria mollissima) and King Eiders (Somateria spectabilis) on in flight over the Beaufort Sea ice pack. Off the coast of the Arctic National Wildlife Refuge. Alaska
    D171815.jpg
  • Common Eiders (Somateria mollissima) and King Eiders (Somateria spectabilis) on in flight over the Beaufort Sea ice pack. Off the coast of the Arctic National Wildlife Refuge. Alaska
    D171805.jpg
  • Polar Bear (Ursus maritimus) the paws of a tranquilized bear. Beaufort Sea, Alaska.
    D171726.jpg
  • Ear tags on a polar bear. One is a number and the other is a Radio Frequency ID.
    D171710.jpg
  • Close detail of polar ber hair and black skin beneath the hair.
    D171656.jpg
  • Dr amstrup check a recently immobilized Alaska.
    D171584.jpg
  • Dr Steven Amstrup positions a block of ice beneath a large male polar bears head for safety as it wakes from the immobilizing drug. Beaufort Sea, Alaska.
    D171545.jpg
  • Dr Steve Amstrup weighs a polar bear on the Beaufort Sea, Alaska
    D171488.jpg
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