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  • 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, organizing field gear in the garage of the USGS field research station, with polar bear radio collars sitting on the counter in the foreground. Kaktovik, Alaska
    D123846.jpg
  • Greg Durner, USGS Alaska Science Center, surveying the range of denning polar bears in the Arctic National WIldlife Refuge. Alaska
    D00029394.jpg
  • Polar bear radio collars at the USGS field station in Kaktovik, Alaska.
    D123848.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
  • Steve Amstrup. lead biologist for the USGS, leans out of a research helicopter to take aim at a running polar bear to be darted for data collection on the Beaufort sea ice.
    D123896.jpg
  • Dr. Steve Amstrup, USGS USGS biologist and assistant, Karyn Rode, preparing to collect data from a small, female, polar bear. Beaufort Sea ice pack.
    D125148.jpg
  • Dr. Steve Amstrup, USGS USGS biologist and assistant, Karyn Rode, preparing to collect data from a small, female, polar bear. Beaufort Sea ice pack.
    D125150.jpg
  • USGS polar bear team preparing for a day of polar bear research. Kaktovik, Alaska
    D125081.jpg
  • The lip tattoo of #20900 tells Dr. Steve Amstrup, USGS biologist, that this large male polar bear had been captured before and had data collected on it. Beaufort Sea ice pack, Kaktovik, Alaska
    D125009.jpg
  • Dr. Steve Amstrup , USGS biologist, and Karyn Rode, field assitant, taking field data from an immobilized large male polar bear (Ursus maritimus). Kaktovik, Alaska.
    D124519.jpg
  • Steve Amstrup. lead biologist for the USGS leans out of a research helicopter to take aim at a running polar bear to be darted for data collection. Beaufort sea ice in Kaktovik, Alaska.
    D123892.jpg
  • A female polar bear (Ursus maritimus) newly painted with an identifying number on her back, stands in a groggy, disoriented state having just emerged from an immobilizing drug used by USGS biologists to perform field research. Kaktovik, Alaska.
    D123609.jpg
  • Steve Amstrup, lead biologist for the USGS, admisters additional telezol , an immobilizing drug to a large male polar bear (Ursus maritimus). Kaktovik, Alaska.
    D123926.jpg
  • Steve Amstrup , lead USGS biologist, and assistant Karyn Rode, taking field data from an immobilized large, male, polar bear.
    D125241.jpg
  • Geoff York, a USGS biologist, prepares a male polar bear (Ursus maritimus) to extract a tooth for aging the animal. To age a polar bear properly it's necessary to remove one of the vestigial pre-molars, a tooth just behind the lower canines. It's thought that these teeth are not used a great deal and are unnecessary for survival. Kaktovik, Alaska.
    D123654.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
  • Dr. Steve Amstrup, USGS biologist, and field assistant Karyn Rode taking field data from an immobilized large male polar bear.
    D124554.jpg
  • Doc Gohmert and Arnold Turner spend time at the Fish and Wildlife house in Kaktovik waiting for the weather to clear so they can continue capturing polar bears with Dr. Steve Amstrup of the USGS. Kaktovik, Alaska.
    D125620.jpg
  • Dr. Steve Amsrup, USGS biologist, searching for polar bear tracks from a helicopter on the Beaufort Sea ice pack.  Kaktovik, Alaska.
    D125028.jpg
  • Dr. Steve Amstrup, USGS biologist and assistant Kristin Simac, prepare a large male, polar bear for a test called Body Mass Index (BMI) which measures the fat mass of individual bears.
    D125014.jpg
  • Dr. Steve Amstrup, USGS biologist, weighing a large, male polar bear (Ursus maritimus) weighing 944 pouns on the Beaufort Sea ice pack. Kaktovik, Alaska.
    D124965.jpg
  • Dr. Steve Amstrup, USGS biologist and assitant Kristin Simac, work at rolling over a large male polar bear weighing 944 lbs. Beaufort Sea ice pack.
    D124859.jpg
  • Dr. Steve Amstrup , USGS biologist and Karyn Rode, field assitant, taking field data from an immobilized large male polar bear (Ursus maritimus). Kaktovik, Alaska..
    D124571.jpg
  • Geoff York, a USGS biologist and Karyn Rode, a research assistant, collecting data from a polar bear (Ursus maritimus) on the Beaufort Sea ice. Kaktovik, Alaska.
    D124356.jpg
  • Geoff York, a USGS biologist and Karyn Rhode, a research assistant, collecting data from a polar bear (Ursus maritimus) on the Beaufort Sea ice. Kaktovik, Alaska.
    D124352.jpg
  • Geoff York, USGS biologist, checks the data base field book that details polar bear captures since 1967 of the Beaufort Sea region. Kaktovik, Alaska.
    D124415.jpg
  • Steve Amstrup and Geoff York, USGS biologists, taking field data from an immobilized large male polar bear (Ursus maritimus). Kaktovik, Alaska.
    D123989.jpg
  • Steve Amstrup and Geoff York, USGS biologists, taking field data from an immobilized large male polar bear (Ursus maritimus). Kaktovik, Alaska..
    D123940.jpg
  • Steve Amstrup. lead biologist for the USGS leans out of a research helicopter to take aim at a running polar bear to be darted for data collection. Beaufort sea ice in Kaktovik, Alaska.
    D123895.jpg
  • Geoff York, USGS biologist organizing field gear in the garage of the field research station in Kaktovik, Alaska.
    D123820.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 performed their field tests on him. Kaktovik, Alaska.
    D123810.jpg
  • Geoff York, a USGS biologist  taking measurements of a polar bear (Ursus maritimus) on the Beaufort Sea ice. Kaktovik, Alaska.
    D123781.jpg
  • A female polar bear (Ursus maritimus) gets to her feet, still groggy from the tranquilizing drug used to immobilize her for field data collection by USGS biologist Geoff York. A number has been painted on her back for easy identification from the air that she's already been captured this season. Kaktovik, Alaska.
    D123594.jpg
  • Geoff York, a USGS biologist and Katrina Knott, a research assistant, collecting data from a polar bear (Ursus maritimus) on the Beaufort Sea ice. Kaktovik, Alaska.
    D123723.jpg
  • Geoff York, biologist for the USGS,  prepares a male polar bear to extract a tooth used to  age the animal. Kaktovik, Alaska.
    D123522.jpg
  • Steve Amstrup , lead USGS biologist, taking field data from an immobilized large male polar bear.
    D125255.jpg
  • Karen Rode, part of the USGS polar bear capture team attempting to dart a large male polar bear on the Beaufort Sea ice Pack.
    D125217.jpg
  • USGS assistant, Karyn Rode, preparing to collect data from a small, female, polar bear. Beaufort Sea ice pack.
    D125145.jpg
  • Dr. Steve Amstrup, USGS biologist  preparing to collect data from a small, female, polar bear. Beaufort Sea ice pack.
    D125113.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
  • 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.
    D123712.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
  • Steve Amstrup and Geoff York, USGS biologists, taking blood from an immobilized large male polar bear.
    D123995.jpg
  • A female polar bear dazed and weak from an immobilizing drug she received from Dr. Steve Amstrup, USGS biologist. Beaufort Sea ice pack, Kaktovik, Alaska
    D125614.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.
    D125579.jpg
  • Dr. Steve Amstrup, USGS biologist, weighs a large male polar bear (Ursus maritimus) on the Beaufort Sea ice pack. Kaktovik, Alaska.
    D125793.jpg
  • Dr. Steve Amstrup, USGS biologist, prepares to take data from a large male polar bear on the Beaufort Sea ice pack. Kaktovik, Alaska
    D125751.jpg
  • Dr. Steve Amstrup, USGS biologist and assistant Kristin Simac, prepare a large male, polar bear for a test called Body Mass Index (BMI) which measures the fat mass of individual bears.
    D124868.jpg
  • Research capture helicopter, USGS polar bear study, Beraufort Sea ice.
    D124810.jpg
  • Tattoo kit that is used by USGS biologists to tattoo the lips of captured polar bears for future identification. Kaktovik, Alaska.
    D124432.jpg
  • Steve Amstrup and Geoff York, USGS biologists, taking field data from an immobilized large male polar bear (Ursus maritimus). Kaktovik, Alaska..
    D123970.jpg
  • Steve Amstrup. lead biologist for the USGS leans out of a research helicopter to take aim at a running polar bear to be darted for data collection. Beaufort sea ice in Kaktovik, Alaska.
    D123909.jpg
  • Steve Amstrup. lead biologist for the USGS leans out of a research helicopter to take aim at a running polar bear to be darted for data collection. Beaufort sea ice in Kaktovik, Alaska.
    D123879.jpg
  • Polar bear radio collars at the USGS field station in Kaktovik, Alaska.
    D123840.jpg
  • Geoff York, a USGS biologist and Katrina Knott, research assistant, taking measurements of a sedated polar bear (Ursus maritimus) on the Beaufort sea ice. Kaktovik, Alaska.
    D123793.jpg
  • Geoff York a USGS biologist  collecting data from a polar bear (Ursus maritimus) on the Beaufort Sea ice. Kaktovik, Alaska.
    D123711.jpg
  • Geoff York, USGS biologist and Katrina Knott, research assistant, prepare a polar bear (Ursus maritimus) to start doing their research. Kaktovik, Alaska.
    D123661.jpg
  • Dr. Steve Amstrup, USGS biologist and assistant, Karyn Rode, preparing to collect data from a small, female, polar bear. Beaufort Sea ice pack.
    D125118.jpg
  • Geoff York, a USGS biologist  collecting data from a polar bear (Ursus maritimus) on the Beaufort Sea ice. Kaktovik, Alaska.
    D123715.jpg
  • Research biologists with USGS from the Alaska Science Center, surveying the range of Polar Bears(Ursus maritimus) denning in the Arctic Nationa Wildlife Refuge. ANWR.
    D00029917.jpg
  • Research biologist with the USGS of the Alaska Science Center, George Durner working with Polar Bears International doing a survey to determine the denning range of Polar Bears in the Arctic National WIldlife Refuge(ANWR) Alaska. He finds descarded radio collar, which they determine to be from a female Polar Bear (Ursus maritimus) that may have died in the den.
    D00029520.jpg
  • Research biologist with the USGS of the Alaska Science Center, George Durner working with Polar Bears International doing a survey to determine the denning range of Polar Bears in the Arctic National WIldlife Refuge(ANWR) Alaska. He finds descarded radio collar, which they determine to be from a female Polar Bear (Ursus maritimus) that may have died in the den.
    D00029519.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 USGS biologist, paints a number on the back of an immobilized large male polar bear (Ursus maritimus) that was darted for research purposes. Kaktovik, Alaska.
    D124007.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.
    D123967.jpg
  • 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.
    D123799.jpg
  • Geoff York, USGS biologist, prepares a radio collar while Katrina Knott, research assistant, paints 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.
    D123748.jpg
  • Geoff York, USGS biologist and Katrina Knott, research assistant, prepare a polar bear (Ursus maritimus) to start doing their research.  This female bear will receive a radio collar for future tracking.  Kaktovik, Alaska.
    D123700.jpg
  • Geoff York, USGS biologist, collecting data from a polar bear (Ursus maritimus)  on the Beaufort Sea ice. This female bear will receive a radio collar for future tracking.  Kaktovik, Alaska
    D123697.jpg
  • Geoff York, USGS biologist, checks the ear tag of a polar bear (Ursus maritimus) darted from the air for data collection. Kaktovik, Alaska.
    D123633.jpg
  • Dr. Steve Amstrup, USGS biologist and assistant, Karyn Rode, using a (BIA) Bio Electical Impedance Analysis device, to check the weight of a small, female, polar bear. Beaufort Sea ice pack.
    D125160.jpg
  • Research biologists with USGS from the Alaska Science Center, surveying the range of Polar Bears(Ursus maritimus) denning in the Arctic Nationa Wildlife Refuge. ANWR.
    D00029912.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
  • 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 field data from an immobilized large male polar bear.
    D123977.jpg
  • A female polar bear gets to her feet, still groggy from the tranquilizing drug used to immobilize her for field data collection by USGS biologist Geoff York.
    D123579.jpg
  • Geoff York, USGS biologist, takes a blood sample of a darted polar bear. Kaktovik, Alaska
    D123567.jpg
  • Kristin Simac, USGS biologist, assistant to Dr. Steve Amstrup, taking blood from a polar bear (Ursus maritimus).  Kaktovik, Alaska.
    D125996.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.
    D125602.jpg
  • Dr. Steve, Amstrup, USGS biologist, and chopper pilot Doc Gohmert hover over a polar bear (Ursus maritimus) recently darted with immobilizing drugs. Beaufort Sea ice pack, Kaktovik, Alaska.
    D125560.jpg
  • Dr. Steve Amstrup, USGS biologist, removes a pre-vestigal tooth from a large male polar bear. The tooth is a  nonfunctional and is used to precisely age the animal. Kaktovik, Alaska.
    D124979.jpg
  • Dr. Steve Amstrup, USGS biologist, removes a pre-vestigal tooth from a large male polar bear. The tooth is a  nonfunctional and is used to precisely age the animal. Kaktovik, Alaska.
    D124977.jpg
  • Dr. Steve Amstrup, USGS biologist, weighing a large, male polar bear (Ursus maritimus) weighing 944 pouns on the Beaufort Sea ice pack. Kaktovik, Alaska.
    D124957.jpg
  • Dr. Steve Amstrup, USGS biologist,  and his assitant Kristin Simac, prepare a large male polar bear (Ursus maritimus) for data collection on the ice pack of the Beaufort Sea. Kaktovik, Alaska.
    D124901.jpg
  • Dr. Steve Amstrup, USGS biologist, takes a biopsy from a large male polar bear (Ursus maritimus). Beaufort Sea ice pack. Kaktovik, Alaska..
    D124750.jpg
  • Dr. Steve Amstrup , USGS biologist and Karyn Rode, field assitant, taking field data from an immobilized large male polar bear (Ursus maritimus). Kaktovik, Alaska..
    D124560.jpg
  • Katrina Knott , field research assistant, works on preparing blood samples taken from polar bears by USGS biologists. She's working from her field lab at a US Fish & Wildlife Service station in Kaktovik, Alaska.
    D124220.jpg
  • Steve Amstrup, lead USGS biologist, taking field data from an immobilized large male polar bear. Kaktovik, Alaska
    D123981.jpg
  • Steve Amstrup and Geoff York, USGS biologists, using a block and tackle device to take the weight of a large male polar bear (Ursus maritimus).  He was 982 lbs. Kaktovik, Alaska.
    D123964.jpg
  • A large male polar bear (Ursus maritimus) is identified by his lip tattoo , #20571, which tells the USGS biologists that this bear was caught and tagged in earlier years. Kaktovik, Alaska.
    D124188.jpg
  • Steve Amstrup, lead polar bear biologist for the USGS prepares a dart that will be filled with telezol, an imobilizing drug. Kaktovik, Alaska.
    D123865.jpg
  • Steve Amstrup, lead polar bear biologist for the USGS prepares a dart that will be filled with telezol, an imobilizing drug. Kaktovik, Alaska.
    D123855.jpg
  • Geoff York, USGS biologist organizing field gear in the garage of the field research station in Kaktovik, Alaska.
    D123823.jpg
  • Geoff York preparing for field work at the USGS field station in Kaktovik, Alaska.
    D123817.jpg
  • Geoff York, a USGS biologist  taking measurements of a polar bear (Ursus maritimus) on the Beaufort Sea ice. Kaktovik, Alaska.
    D123789.jpg
  • Geoff York ,a USGS biologist, collecting data from a polar bear  (Ursus maritimus) on the Beaufort Sea ice. Kaktovik, Alaska.
    D123692.jpg
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