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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
  • A radio collar and radio receiver used for polar bear science data collection.
    D231456.jpg
  • Greg Durner, USGS Alaska Science Center, surveying the range of denning polar bears in the Arctic National WIldlife Refuge. Alaska
    D00029394.jpg
  • Dr. Steve Amstrup with a tranqulized polar bear (Ursus maritimus) on the ice pack of the Beaufort Sea. Kaktovik, Alaska
    D124625-P.jpg
  • Dr. Steven Amstrup with a polar bear on the Beaufort Sea, Alaska.
    D170908-P.jpg
  • Broken ice in the Beaufort Sea. Arctic Ocean
    D233036.jpg
  • Steve Amstrup and Geoff York, USGS biologists, taking field data from an immobilized large male polar bear (Ursus maritimus). Kaktovik, Alaska
    D123987.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
  • Steve Amstrup and Geoff York, USGS biologists, taking field data from a large, immobilized male polar bear (Ursus maritimus). Kaktovik, Alaska
    D123954.jpg
  • A polar bear (Ursus Maitimus) makes its way over the rugged ice of the Beaufort Sea in Kaktovik, Alaska.
    D123494.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
  • 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
  • Dr. Steve Amstrup, USGS biologist weighing a large, male polar bear weighing 944 lbs.  on the Beaufort Sea ice pack.
    D124966.jpg
  • Dr. Steven Amstrup collects data from a polar bear on the Beaufort Sea, Alaska.
    D171497-P.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. Kaktovik, Alaska
    D125422.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
  • 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
  • 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
  • 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
  • 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-P.jpg
  • Steve Amstrup and Geoff York, USGS biologists, taking blood from an immobilized large male polar bear.
    D123997.jpg
  • Ice breaking apart during late April on the Beaufort Sea. Kaktovik, Alaska
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  • Daniel Cox with his remote camera outside the helicopter. Beaufort Sea, Alaska
    D171949.jpg
  • A polar bear (Ursus maritimus) makes its way across the Beaufort Sea Ice pack. Kaktovik, Alaska
    D125880.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.
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  • 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
  • Dr Steven Amstrup collects data from a polar bear on the Beaufort Sea, Alaska.
    D171516.jpg
  • Polar Bear (Ursus maritimus) tracks on the ice of the Beaufort Sea, Alaska
    D171944.jpg
  • Dr Steven Amstrup leans out of the chopper to dart a polar bear on the Beaufort Sea, Alaska. Steven
    D170828.jpg
  • Dr Steven amstrup and Susie Miller collect data from a captured polar bear, Beaufort Sea, Alaska.
    D170072.jpg
  • A female polar bear (Ursus maritimus) gets electrodes attached for a test to determine body fat content called a BMI/Body Mass Index. Kaktovik, Alaska.
    D126003.jpg
  • Dr. Steve Amstrup, USGS biologist, prepares to take data from a large male polar bear on the Beaufort Sea ice pack. Kaktovik, Alaska
    D125753.jpg
  • Dr. Steve Amstrup , USGS biologist, and Karyn Rode, field assitant, weighing a large male polar bear (Ursus maritimus) on the ice pack of the Beaufort Sea. Kaktovic, Alaska.
    D124605.jpg
  • Geoff York, USGS biologist and assistant Karen Rode take weight measurements of a captured polar bear (Ursus maritimus) on the pack ice of the Beaufort Sea. Kaktovik, Alaska.
    D124398.jpg
  • Steve Amstrup, lead biologist for the USGS, uses a block and tackle device to weigh a large male polar bear (Ursus maritimus). He weighed 982 lbs. Kaktovik, Alaska.
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  • Geoff York ,a USGS biologist,  finishes up his field work on a sedated polar bear (Ursus maritimus) in the foreground as a second bear in the background, darted earlier wakes and gets to it's feet, still groggy from the tranquilizer. Kaktovik, Alaska.
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  • Ice formations stacked up on the ice pack of the Beaufort Sea. Kaktovik, Alaska.
    D125834.jpg
  • The underbelly fur of a large male polar bear (Ursus maritimus). Kaktovik, Alaska
    D125287-P.jpg
  • Dr. Steven Amstrup and assistant Karyn Rode prepare a large male polar bear for scientific data collection they perform out on the ice of the Bering Sea. This large specimen was captured after being immobilized with a dart from a helicopter. This adult male wasn't even over 1,000 pounds, unlike many Dr. Amstrup captured in the 1980s that would tip the scales considerably over that 1,000-pound mark. Alaska
    D125246.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 capture for scientific research.
    D125911.jpg
  • Dr. Steven C. Amstrup checks the paw of polar bear (Ursus maritimus) #20571, a large male that had been tagged years earlier. Kaktovik, Alaska
    D123973.jpg
  • Aerial view of remote camera deployment on a polar bear den site. Svalbard, Norway
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  • On the trail home after deploying a remote camera on a polar bear den site. Svalbard, Norway.
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  • 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
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  • 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
  • Megan Owen and Joanna Sulich working to deploy the Maternal Den Study camera in the field. Svalbard, Norway
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  • 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 prepares to head back to the helicopter pickup site after deploying remote cameras on a polar bear den. Svalbard, Norway
    D1331941.jpg
  • BJ and Nick prepare to pull gear back to the landing site for pickup. Maternal Den Study team, Svalbard, Norway
    D1331919.jpg
  • Krista Wright, Executive Director of Polar Bears International, bundled up in Canada Goose down jacket while on the Maternal Den Study project. Svalbard, Norway
    D1331912.jpg
  • The Maternal Den Study team setting up a remote camera for observing a polar bear den from a great distance. Svalbard, Norway
    D1331866.jpg
  • The Maternal Den Study team setting up a remote camera for observing a polar bear den from a great distance. Svalbard, Norway
    D1331839.jpg
  • The Maternal Den Study team setting up a remote camera for observing a polar bear den from a great distance. Svalbard, Norway
    D1331826.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
  • The dive team works to open a hole in the Arctic Ocean ice pack.
    D231932.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
  • Pam Coy stands in a bear den and assists in removing an immobilized black bear (Ursus americanus) for reserach data. Minnesota
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  • Polar bear with radio collar hunting an open lead, waiting for seals. Beaufort Sea.
    D232537.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
  • Dr. Steve Amstrup, USGS biologist, and assistant Karyn Rode prepare a radio collar to be fitted to a female polar bear on the Beaufort Sea ice pack. Kaktovik, Alaska
    D125178.jpg
  • The polar bear capture team collects data from a female polar bear and her cub. Arctic Ocean
    D228347.jpg
  • Dr. Steven Amstrup and Susie Miller collect the Bioelectric Impedance Analysis (BIA) that quantifies fat reserves of a recently immobilized polar bear on the Beaufort Sea, Alaska.
    D170791.jpg
  • Polar bear shot with a dart filled with an immobilizing drug. The bear is showing signs of ataxia. Beaufort Sea, Alaska
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  • Geoff York, USGS biologist, prepares a polar bear (Ursus maritimus) darted from the air for data collection. Kaktovik, Alaska
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  • Dr. Steven Amstrup shows the canines of a polar bear. Beaufort Sea, Alaska
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  • Dr. Steve Amstrup, USGS biologist, and Doc Gohmert, chopper pilot, prepare to land near an immobilized polar bear (Ursus maritimus). Beaufort Sea ice pack, Kaktovik, Alaska
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  • Geoff York, a USGS biologist and Katrina Knott, research assistant, collecting data from a polar bear (Ursus maritimus) on the Beaufort Sea ice. Kaktovik, Alaska.
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  • 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
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  • A radio collared polar bear makes its way across the broken ice pack of the Beaufort Sea. Arctic Ocean
    D232988 Polar Bear.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
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  • 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
  • Brenna McConnell hauls an ice core sample from a recetnly drilled hole.
    D230130.jpg
  • Mette Kaufman drills holes in an ice core for placing a thermometer in to take temperature profiles. Arctic Ocean
    D230121.jpg
  • Heloise Chenelot waits for help to exit the ice hole she's been diving in. Arctic Ocean
    D230061.jpg
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