George Durner, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 71
Polar bear population dynamics in the southern Beaufort Sea during a period of sea ice decline
In the southern Beaufort Sea of the United States and Canada, prior investigations have linked declines in summer sea ice to reduced physical condition, growth, and survival of polar bears (Ursus maritimus). Combined with projections of population decline due to continued climate warming and the ensuing loss of sea ice habitat, those findings contributed to the 2008 decision to list the species as
Authors
Jeffrey F. Bromaghin, Trent L. McDonald, Ian Stirling, Andrew E. Derocher, Evan S. Richardson, Eric V. Regehr, David C. Douglas, George M. Durner, Todd C. Atwood, Steven C. Amstrup
An experimental investigation of chemical communication in the polar bear
The polar bear (Ursus maritimus), with its wide-ranging movements, solitary existence and seasonal reproduction, is expected to favor chemosignaling over other communication modalities. However, the topography of its Arctic sea ice habitat is generally lacking in stationary vertical substrates routinely used for targeted scent marking in other bears. These environmental constraints may have shaped
Authors
Megan A. Owen, Ronald R. Swaisgood, C. Slocomb, Steven C. Amstrup, George M. Durner, Kristin S. Simac, Allan P. Pessier
Evaluating and ranking threats to the long-term persistence of polar bears
The polar bear (Ursus maritimus) was listed as a globally threatened species under the U.S. Endangered Species Act (ESA) in 2008, mostly due to the significant threat to their future population viability from rapidly declining Arctic sea ice. A core mandate of the ESA is the development of a recovery plan that identifies steps to maintain viable populations of a listed species. A substantive evalu
Authors
Todd C. Atwood, Bruce G. Marcot, David C. Douglas, Steven C. Amstrup, Karyn D. Rode, George M. Durner, Jeffrey F. Bromaghin
Prevalence and spatio-temporal variation of an alopecia syndrome in polar bears (Ursus maritimus) of the southern Beaufort Sea
Alopecia (hair loss) has been observed in several marine mammal species and has potential energetic consequences for sustaining a normal core body temperature, especially for Arctic marine mammals routinely exposed to harsh environmental conditions. Polar bears (Ursus maritimus) rely on a thick layer of adipose tissue and a dense pelage to ameliorate convective heat loss while moving between sea i
Authors
Todd C. Atwood, Elizabeth L. Peacock, K.A. Burek, Valerie I. Shearn-Bochsler, Barbara L. Bodenstein, Kimberlee B. Beckmen, George M. Durner
Effects of capturing and collaring on polar bears: findings from long-term research on the southern Beaufort Sea population
Context: The potential for research methods to affect wildlife is an increasing concern among both scientists and the public. This topic has a particular urgency for polar bears because additional research is needed to monitor and understand population responses to rapid loss of sea ice habitat.Aims: This study used data collected from polar bears sampled in the Alaska portion of the southern Beau
Authors
Karyn D. Rode, Anthony M. Pagano, Jeffrey F. Bromaghin, Todd C. Atwood, George M. Durner, Kristin S. Simac, Steven C. Amstrup
Identifying polar bear resource selection patterns to inform offshore development in a dynamic and changing Arctic
Although sea ice loss is the primary threat to polar bears (Ursus maritimus), little can be done to mitigate its effects without global efforts to reduce greenhouse gas emissions. Other factors, however, could exacerbate the impacts of sea ice loss on polar bears, such as exposure to increased industrial activity. The Arctic Ocean has enormous oil and gas potential, and its development is expected
Authors
Ryan H. Wilson, Jon S. Horne, Karyn D. Rode, Eric V. Regehr, George M. Durner
Variation in the response of an Arctic top predator experiencing habitat loss: Feeding and reproductive ecology of two polar bear populations
Polar bears (Ursus maritimus) have experienced substantial changes in the seasonal availability of sea ice habitat in parts of their range, including the Beaufort, Chukchi, and Bering Seas. In this study, we compared the body size, condition, and recruitment of polar bears captured in the Chukchi and Bering Seas (CS) between two periods (1986–1994 and 2008–2011) when declines in sea ice habitat oc
Authors
Karyn D. Rode, Eric V. Regehr, David C. Douglas, George M. Durner, Andrew E. Derocher, Gregory W. Thiemann, Suzanne M. Budge
Mapping polar bear maternal denning habitat in the National Petroleum Reserve -- Alaska with an IfSAR digital terrain model
The National Petroleum Reserve–Alaska (NPR-A) in northeastern Alaska provides winter maternal denning habitat for polar bears (Ursus maritimus) and also has high potential for recoverable hydrocarbons. Denning polar bears exposed to human activities may abandon their dens before their young are able to survive the severity of Arctic winter weather. To ensure that wintertime petroleum activities do
Authors
George M. Durner, Kristin S. Simac, Steven C. Amstrup
A circumpolar monitoring framework for polar bears
Polar bears (Ursus maritimus) occupy remote regions that are characterized by harsh weather and limited access. Polar bear populations can only persist where temporal and spatial availability of sea ice provides adequate access to their marine mammal prey. Observed declines in sea ice availability will continue as long as greenhouse gas concentrations rise. At the same time, human intrusion and po
Authors
Dag Vongraven, Jon Aars, Steven C. Amstrup, Stephen N. Atkinson, Stanislav Belikov, Erik W. Born, T.D. DeBruyn, Andrew E. Derocher, George M. Durner, Michael J. Gill, Nicholas J. Lunn, Martyn E. Obbard, Jack Omelak, Nikita Ovsyanikov, Elizabeth L. Peacock, E.E. Richardson, Vicki Sahanatien, Ian Stirling, Øystein Wiig
Long-distance swimming by polar bears (Ursus maritimus) of the southern Beaufort Sea during years of extensive open water
Polar bears (Ursus maritimus Phipps, 1774) depend on sea ice for catching marine mammal prey. Recent sea-ice declines have been linked to reductions in body condition, survival, and population size. Reduced foraging opportunity is hypothesized to be the primary cause of sea-ice-linked declines, but the costs of travel through a deteriorated sea-ice environment also may be a factor. We used movemen
Authors
Anthony M. Pagano, George M. Durner, Kristin S. Simac, G.S. York, Steven C. Amstrup
Consequences of long-distance swimming and travel over deep-water pack ice for a female polar bear during a year of extreme sea ice retreat
Polar bears (Ursus maritimus) prefer to live on Arctic sea ice but may swim between ice floes or between sea ice and land. Although anecdotal observations suggest that polar bears are capable of swimming long distances, no data have been available to describe in detail long distance swimming events or the physiological and reproductive consequences of such behavior. Between an initial capture in l
Authors
George M. Durner, J.P. Whiteman, H.J. Harlow, Steven C. Amstrup, E.V. Regehr, M. Ben-David
Greenhouse gas mitigation can reduce sea-ice loss and increase polar bear persistence
On the basis of projected losses of their essential sea-ice habitats, a United States Geological Survey research team concluded in 2007 that two-thirds of the worlds polar bears (Ursus maritimus) could disappear by mid-century if business-as-usual greenhouse gas emissions continue. That projection, however, did not consider the possible benefits of greenhouse gas mitigation. A key question is whet
Authors
Steven C. Amstrup, E.T. Deweaver, David C. Douglas, B.G. Marcot, George M. Durner, C.M. Bitz, D.A. Bailey
Non-USGS Publications**
Amstrup, S. C., G. M. Durner, A. S. Fischbach, K. S. Simac, and G. W. York. 2011. Polar Bear Research in the Beaufort Sea. Proceedings: Bear Taxanomic Group Workshop on Ursids in Captivity. American Zoological Society Annual Meeting. Detroit, MI, USA.
Durner, G. M., D. C. Douglas, R. M. Nielson, S. C. Amstrup, and T. L. McDonald. 2007. Predicting the future distribution of Polar Bear Habitat in the polar basin from resource selection functions applied to 21st century general circulation model projections of sea ice. USGS Administrative Report, 61 p. doi:10.3133/70174076
Bergen, S., G. M. Durner, D. C. Douglas, and S. C. Amstrup. 2007. Predicting movements of female polar bears between summer sea ice foraging habitats and terrestrial denning habitats of Alaska in the 21st century: Proposed methodology and pilot assessment. USGS Administrative Report, 24 p.
Durner, G. M., S. C. Amstrup, G. York, E. V. Regehr, K. S. Simac, T. S. Smith, S. T. Partridge, T. W. Bentzen, K. S. Amstrup, and D. C. Douglas. 2005. Report on research progress in Alaska. Proceedings: 15th Annual meeting of joint commissioners and technical advisors of the Inuvialiut Game Council and North Slope Borough. Edmonton, Alberta, Canada.
Amstrup, S. C., G. M. Durner, E. V. Regehr, G. W. York, K. S. Simac, T. S. Smith, S. T. Partridge, and D. C. Douglas. 2004. Polar Bear Research in the Beaufort Sea. February 2004, Winnipeg, Manitoba. Proceedings: Canadian Polar Bear Technical Committee.
Amstrup, S. C., G. M. Durner, A. S. Fischbach, G. W. York, K. S. Simac, T. S. Smith, S. T. Partridge, and D. C. Douglas. 2003. Polar Bear Research in the Beaufort Sea. February 2003, Edmonton, Alberta. Proceedings: Canadian Polar Bear Technical Committee.
Durner, G. M., S. C. Amstrup, R. Neilson, and T. L. McDonald. 2003. The use of sea ice habitat by female polar bears in the Beaufort Sea. Pages 60-61 in Proceedings of the Ninth MMS Information Transfer Meeting. MMS OCS Study 2003-042, 118 p.
Amstrup, S. C., G. M. Durner, A. S. Fischbach, K. S. Simac, and G. W. York. 2002. Polar Bear Research in the Beaufort Sea. Pages 109-125 in edited by N. J. Lunn, S. Schliebe and E. W. Born, (eds.), Occasional Paper IUCN Specialists Survey Commission 26. Proceedings: 13th Working Meeting of the IUCN/SSC Polar Bear Specialist Group, 23-28 June 2001. Nuuk, Greenland.
Durner, G. M., S. C. Amstrup, A. S. Fischbach, G. S. York, and K. S. Simac. 2002. Polar bear research in the Beaufort Sea. Proceedings: Canadian Polar Bear Technical Committee, 9-10 Feb 2002. Iqualuit, Canada.
Amstrup, S. C., G. M. Durner, A. S. Fischbach, K. S. Simac, and G. W. York. 2002. Polar Bear Research in the Beaufort Sea. Proceedings of the Bear Taxanomic Group Workshop on Ursids in Captivity. Annual Meeting of the American Zoological Society, Detroit, MI, April 27 - 29, 2001.
Amstrup, S. C., G. M. Durner, and T. L. McDonald. 2002. Volume III, Appendix J 1, Liberty Development and Production Plan. Draft Environmental Impact Statement. Minerals Management Service, Alaska Outer Continental Shelf Region OCS EIS/EA MMS 2001-001.
Amstrup, S. C. and G. M. Durner. 1999. Polar Bear Research in the Beaufort Sea. Pages 131-139 in A. E. Derocher, (ed.), Occasional Paper IUCN Specialists Survey Commission 19. Proceedings: IUCN/SSC Polar Bear Specialist Group
Amstrup, S. C. and G. M. Durner. 1999. Polar bear research in the Beaufort Sea. Proceedings: Canadian Polar Bear Technical Committee
Amstrup, S. C. and G. M. Durner. 1998. Polar bear research in the Beaufort Sea. Pages 47-52 in Proceedings: Canadian Polar Bear Technical Committee
Amstrup, S. C. and G. M. Durner. 1998. Polar bear research in the Beaufort Sea. Pages 131-139 in A. E. Derocher, G. W. Garner, N. J. Lunn, and O. Wiig, (eds.). International Union for Conservation of Nature and Natural Resources, Gland, Switzerland. IUCN/SSC Occasional Paper 19. 159 pp. Proceedings: 12th Working Meeting of the IUCN/SSC Polar Bear Specialist Group Oslo, Norway.
Amstrup, S. C. and G. M. Durner. 1998. Identification of polar bear den habitat in northern Alaska. Pages 141-145 in A. E. Derocher, G. W. Garner, N. J. Lunn, and O. Wiig, (eds.). International Union for Conservation of Nature and Natural Resources, Gland, Switzerland. IUCN/SSC Occasional Paper 19. 159 pp. Proceedings: 12th Working Meeting of the IUCN/SSC Polar Bear Specialist Group Oslo, Norway.
Durner, G. M. and J. E. Gates. 1993. Spatial Ecology of Black Rat Snakes on Remington Farms, Maryland. Journal of Wildlife Management 57(4):812-826.
Amstrup, S. C. and G. M. Durner. 1992. Temporal and geographic variation of maternity denning among polar bears of the Beaufort Sea. US Fish and Wildlife Service, Pages 198-206 in T. R. Mc Cabe, B. Griffith, N. E. Walsh, and D. D. Young, (eds.). Terrestrial Research: 1002 area - Arctic National Wildlife Refuge, Interim Report, 1988-1990, 432 p.
Amstrup, S. C. and G. M. Durner. 1992. Polar bear maternity denning on the Arctic National Wildlife Refuge, Alaska. US Fish and Wildlife Service, Pages 189-197 in T. R. Mc Cabe, B. Griffith, N. E. Walsh, and D. D. Young, (eds.). Terrestrial Research: 1002 area - Arctic National Wildlife Refuge, Interim Report, 1988-1990, 432 p.
Amstrup, S. C. and G. M. Durner. 1992. Responses of maternal polar bears to human activities in Alaska. US Fish and Wildlife Service, Pages 198-206 in T. R. Mc Cabe, B. Griffith, N. E. Walsh, and D. D. Young, (eds.). Terrestrial Research: 1002 area - Arctic National Wildlife Refuge, Interim Report, 1988-1990, 432 p.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
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Filter Total Items: 71
Polar bear population dynamics in the southern Beaufort Sea during a period of sea ice decline
In the southern Beaufort Sea of the United States and Canada, prior investigations have linked declines in summer sea ice to reduced physical condition, growth, and survival of polar bears (Ursus maritimus). Combined with projections of population decline due to continued climate warming and the ensuing loss of sea ice habitat, those findings contributed to the 2008 decision to list the species asAuthorsJeffrey F. Bromaghin, Trent L. McDonald, Ian Stirling, Andrew E. Derocher, Evan S. Richardson, Eric V. Regehr, David C. Douglas, George M. Durner, Todd C. Atwood, Steven C. AmstrupAn experimental investigation of chemical communication in the polar bear
The polar bear (Ursus maritimus), with its wide-ranging movements, solitary existence and seasonal reproduction, is expected to favor chemosignaling over other communication modalities. However, the topography of its Arctic sea ice habitat is generally lacking in stationary vertical substrates routinely used for targeted scent marking in other bears. These environmental constraints may have shapedAuthorsMegan A. Owen, Ronald R. Swaisgood, C. Slocomb, Steven C. Amstrup, George M. Durner, Kristin S. Simac, Allan P. PessierEvaluating and ranking threats to the long-term persistence of polar bears
The polar bear (Ursus maritimus) was listed as a globally threatened species under the U.S. Endangered Species Act (ESA) in 2008, mostly due to the significant threat to their future population viability from rapidly declining Arctic sea ice. A core mandate of the ESA is the development of a recovery plan that identifies steps to maintain viable populations of a listed species. A substantive evaluAuthorsTodd C. Atwood, Bruce G. Marcot, David C. Douglas, Steven C. Amstrup, Karyn D. Rode, George M. Durner, Jeffrey F. BromaghinPrevalence and spatio-temporal variation of an alopecia syndrome in polar bears (Ursus maritimus) of the southern Beaufort Sea
Alopecia (hair loss) has been observed in several marine mammal species and has potential energetic consequences for sustaining a normal core body temperature, especially for Arctic marine mammals routinely exposed to harsh environmental conditions. Polar bears (Ursus maritimus) rely on a thick layer of adipose tissue and a dense pelage to ameliorate convective heat loss while moving between sea iAuthorsTodd C. Atwood, Elizabeth L. Peacock, K.A. Burek, Valerie I. Shearn-Bochsler, Barbara L. Bodenstein, Kimberlee B. Beckmen, George M. DurnerEffects of capturing and collaring on polar bears: findings from long-term research on the southern Beaufort Sea population
Context: The potential for research methods to affect wildlife is an increasing concern among both scientists and the public. This topic has a particular urgency for polar bears because additional research is needed to monitor and understand population responses to rapid loss of sea ice habitat.Aims: This study used data collected from polar bears sampled in the Alaska portion of the southern BeauAuthorsKaryn D. Rode, Anthony M. Pagano, Jeffrey F. Bromaghin, Todd C. Atwood, George M. Durner, Kristin S. Simac, Steven C. AmstrupIdentifying polar bear resource selection patterns to inform offshore development in a dynamic and changing Arctic
Although sea ice loss is the primary threat to polar bears (Ursus maritimus), little can be done to mitigate its effects without global efforts to reduce greenhouse gas emissions. Other factors, however, could exacerbate the impacts of sea ice loss on polar bears, such as exposure to increased industrial activity. The Arctic Ocean has enormous oil and gas potential, and its development is expectedAuthorsRyan H. Wilson, Jon S. Horne, Karyn D. Rode, Eric V. Regehr, George M. DurnerVariation in the response of an Arctic top predator experiencing habitat loss: Feeding and reproductive ecology of two polar bear populations
Polar bears (Ursus maritimus) have experienced substantial changes in the seasonal availability of sea ice habitat in parts of their range, including the Beaufort, Chukchi, and Bering Seas. In this study, we compared the body size, condition, and recruitment of polar bears captured in the Chukchi and Bering Seas (CS) between two periods (1986–1994 and 2008–2011) when declines in sea ice habitat ocAuthorsKaryn D. Rode, Eric V. Regehr, David C. Douglas, George M. Durner, Andrew E. Derocher, Gregory W. Thiemann, Suzanne M. BudgeMapping polar bear maternal denning habitat in the National Petroleum Reserve -- Alaska with an IfSAR digital terrain model
The National Petroleum Reserve–Alaska (NPR-A) in northeastern Alaska provides winter maternal denning habitat for polar bears (Ursus maritimus) and also has high potential for recoverable hydrocarbons. Denning polar bears exposed to human activities may abandon their dens before their young are able to survive the severity of Arctic winter weather. To ensure that wintertime petroleum activities doAuthorsGeorge M. Durner, Kristin S. Simac, Steven C. AmstrupA circumpolar monitoring framework for polar bears
Polar bears (Ursus maritimus) occupy remote regions that are characterized by harsh weather and limited access. Polar bear populations can only persist where temporal and spatial availability of sea ice provides adequate access to their marine mammal prey. Observed declines in sea ice availability will continue as long as greenhouse gas concentrations rise. At the same time, human intrusion and poAuthorsDag Vongraven, Jon Aars, Steven C. Amstrup, Stephen N. Atkinson, Stanislav Belikov, Erik W. Born, T.D. DeBruyn, Andrew E. Derocher, George M. Durner, Michael J. Gill, Nicholas J. Lunn, Martyn E. Obbard, Jack Omelak, Nikita Ovsyanikov, Elizabeth L. Peacock, E.E. Richardson, Vicki Sahanatien, Ian Stirling, Øystein WiigLong-distance swimming by polar bears (Ursus maritimus) of the southern Beaufort Sea during years of extensive open water
Polar bears (Ursus maritimus Phipps, 1774) depend on sea ice for catching marine mammal prey. Recent sea-ice declines have been linked to reductions in body condition, survival, and population size. Reduced foraging opportunity is hypothesized to be the primary cause of sea-ice-linked declines, but the costs of travel through a deteriorated sea-ice environment also may be a factor. We used movemenAuthorsAnthony M. Pagano, George M. Durner, Kristin S. Simac, G.S. York, Steven C. AmstrupConsequences of long-distance swimming and travel over deep-water pack ice for a female polar bear during a year of extreme sea ice retreat
Polar bears (Ursus maritimus) prefer to live on Arctic sea ice but may swim between ice floes or between sea ice and land. Although anecdotal observations suggest that polar bears are capable of swimming long distances, no data have been available to describe in detail long distance swimming events or the physiological and reproductive consequences of such behavior. Between an initial capture in lAuthorsGeorge M. Durner, J.P. Whiteman, H.J. Harlow, Steven C. Amstrup, E.V. Regehr, M. Ben-DavidGreenhouse gas mitigation can reduce sea-ice loss and increase polar bear persistence
On the basis of projected losses of their essential sea-ice habitats, a United States Geological Survey research team concluded in 2007 that two-thirds of the worlds polar bears (Ursus maritimus) could disappear by mid-century if business-as-usual greenhouse gas emissions continue. That projection, however, did not consider the possible benefits of greenhouse gas mitigation. A key question is whetAuthorsSteven C. Amstrup, E.T. Deweaver, David C. Douglas, B.G. Marcot, George M. Durner, C.M. Bitz, D.A. BaileyNon-USGS Publications**
Amstrup, S. C., G. M. Durner, A. S. Fischbach, K. S. Simac, and G. W. York. 2011. Polar Bear Research in the Beaufort Sea. Proceedings: Bear Taxanomic Group Workshop on Ursids in Captivity. American Zoological Society Annual Meeting. Detroit, MI, USA.Durner, G. M., D. C. Douglas, R. M. Nielson, S. C. Amstrup, and T. L. McDonald. 2007. Predicting the future distribution of Polar Bear Habitat in the polar basin from resource selection functions applied to 21st century general circulation model projections of sea ice. USGS Administrative Report, 61 p. doi:10.3133/70174076Bergen, S., G. M. Durner, D. C. Douglas, and S. C. Amstrup. 2007. Predicting movements of female polar bears between summer sea ice foraging habitats and terrestrial denning habitats of Alaska in the 21st century: Proposed methodology and pilot assessment. USGS Administrative Report, 24 p.Durner, G. M., S. C. Amstrup, G. York, E. V. Regehr, K. S. Simac, T. S. Smith, S. T. Partridge, T. W. Bentzen, K. S. Amstrup, and D. C. Douglas. 2005. Report on research progress in Alaska. Proceedings: 15th Annual meeting of joint commissioners and technical advisors of the Inuvialiut Game Council and North Slope Borough. Edmonton, Alberta, Canada.Amstrup, S. C., G. M. Durner, E. V. Regehr, G. W. York, K. S. Simac, T. S. Smith, S. T. Partridge, and D. C. Douglas. 2004. Polar Bear Research in the Beaufort Sea. February 2004, Winnipeg, Manitoba. Proceedings: Canadian Polar Bear Technical Committee.Amstrup, S. C., G. M. Durner, A. S. Fischbach, G. W. York, K. S. Simac, T. S. Smith, S. T. Partridge, and D. C. Douglas. 2003. Polar Bear Research in the Beaufort Sea. February 2003, Edmonton, Alberta. Proceedings: Canadian Polar Bear Technical Committee.Durner, G. M., S. C. Amstrup, R. Neilson, and T. L. McDonald. 2003. The use of sea ice habitat by female polar bears in the Beaufort Sea. Pages 60-61 in Proceedings of the Ninth MMS Information Transfer Meeting. MMS OCS Study 2003-042, 118 p.Amstrup, S. C., G. M. Durner, A. S. Fischbach, K. S. Simac, and G. W. York. 2002. Polar Bear Research in the Beaufort Sea. Pages 109-125 in edited by N. J. Lunn, S. Schliebe and E. W. Born, (eds.), Occasional Paper IUCN Specialists Survey Commission 26. Proceedings: 13th Working Meeting of the IUCN/SSC Polar Bear Specialist Group, 23-28 June 2001. Nuuk, Greenland.Durner, G. M., S. C. Amstrup, A. S. Fischbach, G. S. York, and K. S. Simac. 2002. Polar bear research in the Beaufort Sea. Proceedings: Canadian Polar Bear Technical Committee, 9-10 Feb 2002. Iqualuit, Canada.Amstrup, S. C., G. M. Durner, A. S. Fischbach, K. S. Simac, and G. W. York. 2002. Polar Bear Research in the Beaufort Sea. Proceedings of the Bear Taxanomic Group Workshop on Ursids in Captivity. Annual Meeting of the American Zoological Society, Detroit, MI, April 27 - 29, 2001.Amstrup, S. C., G. M. Durner, and T. L. McDonald. 2002. Volume III, Appendix J 1, Liberty Development and Production Plan. Draft Environmental Impact Statement. Minerals Management Service, Alaska Outer Continental Shelf Region OCS EIS/EA MMS 2001-001.Amstrup, S. C. and G. M. Durner. 1999. Polar Bear Research in the Beaufort Sea. Pages 131-139 in A. E. Derocher, (ed.), Occasional Paper IUCN Specialists Survey Commission 19. Proceedings: IUCN/SSC Polar Bear Specialist GroupAmstrup, S. C. and G. M. Durner. 1999. Polar bear research in the Beaufort Sea. Proceedings: Canadian Polar Bear Technical CommitteeAmstrup, S. C. and G. M. Durner. 1998. Polar bear research in the Beaufort Sea. Pages 47-52 in Proceedings: Canadian Polar Bear Technical CommitteeAmstrup, S. C. and G. M. Durner. 1998. Polar bear research in the Beaufort Sea. Pages 131-139 in A. E. Derocher, G. W. Garner, N. J. Lunn, and O. Wiig, (eds.). International Union for Conservation of Nature and Natural Resources, Gland, Switzerland. IUCN/SSC Occasional Paper 19. 159 pp. Proceedings: 12th Working Meeting of the IUCN/SSC Polar Bear Specialist Group Oslo, Norway.Amstrup, S. C. and G. M. Durner. 1998. Identification of polar bear den habitat in northern Alaska. Pages 141-145 in A. E. Derocher, G. W. Garner, N. J. Lunn, and O. Wiig, (eds.). International Union for Conservation of Nature and Natural Resources, Gland, Switzerland. IUCN/SSC Occasional Paper 19. 159 pp. Proceedings: 12th Working Meeting of the IUCN/SSC Polar Bear Specialist Group Oslo, Norway.Durner, G. M. and J. E. Gates. 1993. Spatial Ecology of Black Rat Snakes on Remington Farms, Maryland. Journal of Wildlife Management 57(4):812-826.Amstrup, S. C. and G. M. Durner. 1992. Temporal and geographic variation of maternity denning among polar bears of the Beaufort Sea. US Fish and Wildlife Service, Pages 198-206 in T. R. Mc Cabe, B. Griffith, N. E. Walsh, and D. D. Young, (eds.). Terrestrial Research: 1002 area - Arctic National Wildlife Refuge, Interim Report, 1988-1990, 432 p.Amstrup, S. C. and G. M. Durner. 1992. Polar bear maternity denning on the Arctic National Wildlife Refuge, Alaska. US Fish and Wildlife Service, Pages 189-197 in T. R. Mc Cabe, B. Griffith, N. E. Walsh, and D. D. Young, (eds.). Terrestrial Research: 1002 area - Arctic National Wildlife Refuge, Interim Report, 1988-1990, 432 p.Amstrup, S. C. and G. M. Durner. 1992. Responses of maternal polar bears to human activities in Alaska. US Fish and Wildlife Service, Pages 198-206 in T. R. Mc Cabe, B. Griffith, N. E. Walsh, and D. D. Young, (eds.). Terrestrial Research: 1002 area - Arctic National Wildlife Refuge, Interim Report, 1988-1990, 432 p.**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
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*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government