polar bear population dataset

In recent years, a warming climate has caused major changes in the Arctic sea ice environment, leading to concerns regarding the status of polar bear populations. Canada, the United States, Denmark, Norway and the former USSR signed the International Agreement on the Conservation of Polar Bears and their Habitat, strictly regulating commercial hunting. Pregnant polar bears enter maternity dens in October/November, give birth to cubs in December/January, and exit dens in March/April. Some are stable, some seem to be increasing, and some are decreasing due to various pressures. Bromaghin, J. F., T. L. McDonald, I. Stirling, A. E. Derocher, E. S. Richardson, E. V. Regehr, D. C. Douglas, G. M. Durner, T. Atwood, and S. C. Amstrup. A: The population of polar bears today is larger than it was in the 1970s, due mainly to legislation banning polar bear hunting, but exact numbers are unclear. Polar bears live in 19 populations across the Arctic. Further we are conducting a variety of research to better understand the factors affecting survival and reproduction. Consistently, sea ice conditions are the most influential determinant of long-term population outcomes. The present table has been developed during 2019, based on new criteria for status assessments. Status table criteria (pdf) Return to Ecosystems >> Marine Ecosystems >> Polar Bear Research, Polar bear population status in the southern Beaufort Sea. About 60% live within or are shared by Canada. Polar bears are also found in the U.S. (Alaska), Russia, Greenland, and Norway (Svalbard). The State of the Polar Report 2018 put the new global mid-point estimate [of the polar bear population] at more than 30,000. Polar bear population dynamics in the southern Beaufort Sea during a period of sea ice decline. Data from conservation groups and the government show that the polar bear population is roughly five times what it was in the 1950s and three or four times what it was in the 1970s when polar bears became protected under international treaty. The USGS maintains a long-term research program focused on the population dynamics of the southern Beaufort Sea polar bear population. In addition, the USGS collaborates with the US Fish and Wildlife Service in population studies in the Chukchi Sea. Click on a pin on the map to see more information. This status table will be updated whenever there are new information available that is considered credible and valid by the group, but not more frequent than once per year. 19 Recent observations of intraspecific predation and cannibalism among polar bears in the southern Beaufort Sea; 2006; Article; Journal; Polar Biology; Amstrup, S. C.; Stirling, I.; Smith, T. S.; Perham, C.; Thiemann, G. W. Geographic Names Information System (GNIS), Mapping, Remote Sensing, and Geospatial Data, Distribution and Movements of Polar Bears, University of California, Santa Cruz (UCSC), Alaska Department of Fish and Game (ADFG). 22-31,000 The USGS Alaska Science Center leads long–term research on polar bears to inform local, state, national and international policy makers regarding conservation of the species and its habitat. The polar bear was upgraded from Least Concern to Vulnerable by the the IUCN Polar Bear Specialist Group. WWF works with communities throughout the Arctic to help them deal with the effects of climate change, support research, and bring northern stories to a global audience. Polar bears (Ursus maritimus) are one of 4 marine mammal species managed by the U.S. Department of Interior. Summary of polar bear population status per 2019 The present table has been developed during 2019, based on new criteria for status assessments . 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). UPDATE 26 March 2019: See “ Latest global polar bear abundance ‘best guess’ estimate is 39,000 (26,000-58,000) ” Figure 1.
polar bears worldwide, estimated We have developed Bayesian network models to forecast the circumpolar status of polar bears, evaluate the potential benefit of mitigated greenhouse gas emissions on sea ice habitat, and the influence of environmental and anthropogenic stressors on population persistence. Forecasting the influence of environmental and anthropogenic stressors on polar bears. In October 2019, the Polar Bear Specialist Group of the International Union for the Conservation of Nature (IUCN) released a new assessment of polar bears. Most important of these is foraging, or access to food. Building a future in which people live in harmony with nature. 4 populations are in decline The leaders made significant commitments to address issues of polar bear habitat, research and trade. Status table 2019 (pdf) Ecological Applications 25(3):634-651. Population-level effects of climatic change, however, remain... Polar bears depend entirely on sea ice for survival. Polar bears are an integral part of the Arctic ecosystem and the food web for Indigenous Peoples -- who have hunted polar bears sustainably for millennia. This study found that low survival, particularly of cubs, from 2004 through 2006 led to a 25–50% decline in population size in less than 10 years. 60-80% © 2020 WWF - World Wide Fund For Nature © 1986 Panda Symbol WWF – World Wide Fund For Nature (formerly World Wildlife Fund)® “WWF” is a WWF Registered Trademark Today, polar bears are among the few large carnivores that are still found in roughly their original habitat and range--and in some places, in roughly their natural numbers. 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. 8) evaluated survival in relation to climatic conditions and estimated population size for polar bears (Ursus maritimus) in western Hudson Bay, Canada. Polar Bear Population Status in the Southern Beaufort Sea. 2016). Over the last three decades, as sea ice has become thinner and prone to fragmentation, there has been a landward shift in the distribution... Polar bears are tied to the sea ice for nearly all of their life cycle functions. Status of the polar bear populations

2015. of polar bears are in Canada. Ministers and other leaders from the five polar bear range states met in Moscow for the first International Forum on Polar Bear Conservation. Press the subpopulation hyperlink and more information will appear. Currently, we are developing spatial capture-recapture models that incorporate resource selection into the abundance modeling process. Adverse consequences of loss of sea ice habitat become more pronounced as the summer ice‐free period lengthens beyond four months, which could occur in most of the Arctic basin after mid‐century if greenhouse gas emissions are not promptly reduced. Additionally, this work will allow us to develop an understanding of how polar bear populations will respond to a variety of... Below are publications associated with this project. Effective conservation planning requires understanding and ranking threats to wildlife populations. This status table will be updated whenever there are new information available that is considered credible and valid by … By 2040, scientists predict that only a fringe of ice will remain in Northeast Canada and Northern Greenland when all other large areas of summer ice are gone. The findings reveal the most up-to-date information for polar bear populations. Below are other science projects associated with this project. Effects of earlier sea ice breakup on survival and population size of polar bears in western Hudson Bay; 2007; Article; Journal; Journal of Wildlife Management; Regehr, E. V.; Lunn, N. J.; Amstrup, S. C.; Stirling, I. Polar Bear Population Status in the Southern Beaufort Sea; 2006; OFR; 2006-1337; Regehr, Eric V.; Amstrup, Steven C.; Stirling, Ian. Upper graph uses totals reported in PBSG status tables, with min/max; Lower graph uses the same figures, but adds back in the … Polar bears depend entirely on sea ice for survival. Here we present findings from long-term studies of polar bears in the southern Beaufort Sea (SBS) region of the U.S. and Canada,... Intraspecific killing has been reported among polar bears (Ursus maritimus), brown bears (U. arctos), and black bears (U. americanus). We developed a Bayesian network model to evaluate the relative influence of environmental and anthropogenic stressors, and their mitigation, on the persistence of polar bears (Ursus maritimus). Polar bears almost exclusively eat seals, and they are equally as dependent upon the sea for their nutrition as are seals, whales, and other aquatic mammals. The US Government classified the Polar Bear under its Endangered Species Act (ESA). Unregulated commercial and recreational hunting continued until the 1970s. Although most of the world's 19 populations have returned to healthy numbers, there are differences between them. Updated 2019 with data from the IUCN Polar Bear Specialists Group. Some of the most pronounced ecological responses to climatic warming are expected to occur in polar marine regions, where temperature increases have been the greatest and sea ice provides a sensitive mechanism by which climatic conditions affect sympagic (i.e., with ice) species. Source: IUCN (How is this range calculated?) US and international conservation planning efforts, including management of polar bears as a threatened species under the Endangered Species Act and the circumpolar action plan for polar bears, require assessments that evaluate the temporal and spatial pattern over which sea ice loss and other factors may affect polar bear populations.

Status and Trends of the World's 19 Polar Bear Populations. site by biome creative, Protect Arctic whales from underwater noise, International Agreement on the Conservation of Polar Bears and their Habitat, By 2040, scientists predict that only a fringe of ice will remain, Polar bear assessment bring good and troubling news, 8 populations are data-deficient (information missing or outdated), A projection of sea ice in the archipelago, supported by WWF, shows that much of the region is.
In recent years, a warming climate has caused major changes in the Arctic sea ice environment, leading to concerns regarding the status of polar bear populations. In 2015, the IUCN Polar Bear Specialist Group estimated the population at 26,000 (range 22,000–31,000)7 but additional surveys published 2015–2017 brought the total to near 28,500. Polar bears are not aquatic, however, and their only access to the seals is from the surface of the... Research in this focal area is centered on (i) collecting data on a variety of systems that help determine and mediate polar bear health and energetics, and (ii) developing monitoring and surveillance programs for detecting changes in population health over time. Historically, most polar bears from the Southern Beaufort Sea (SBS) population constructed maternity dens on the sea ice. Information on the status and trends of polar bear populations are needed to inform management of polar bears under US laws and international agreements. distinct sub-populations Status of the polar bear populations Updated 2019 with data from the IUCN Polar Bear Specialists Group. Some are stable, some seem to be increasing, and some are decreasing due to various pressures. Between 24 January and 10 April 2004, we confirmed three instances of intraspecific... Below are partners associated with this project. Supplemental Materials for the Analysis of Capture-Recapture Data for Polar Bears in Western Hudson Bay, Canada, 1984-2004; 2007; DS; 304; Regehr, Eric V.; Lunn, Nicholas J.; Amstrup, Steven C.; Stirling, Ian. Combined with projections of population decline due to continued climate warming and the ensuing loss of sea ice habitat, those findings... Regehr and others (2007, Survival and population size of polar bears in western Hudson Bay in relation to earlier sea ice breakup: Journal of Wildlife Management, v. 71, no. 32 (1.1%) in Russia. The Arctic is warming faster than any other region on Earth, and the world is already feeling the effects. Although the researchers couldn't determine population health everywhere, they found declines in four sub-populations, stability in five sub-populations, and an increase in one sub-population. Status report 2019 (pdf), This page was published September 22 2019, 15.4 (0.5%) in U.S. + approx. This "Last Ice Area" is likely to become important for polar bears and other life that depends on ice. Explanations for sea ice metric method here. No data point selected.

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