File:A Mom and Her Cubs (27400492256).jpg
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Summary
[edit]DescriptionA Mom and Her Cubs (27400492256).jpg |
English: Ursus maritimus
USGS uses the latest technology in satellite radio-tracking to fill key information gaps on how polar bears use both the sea ice and land. Adult female polar bears are captured, fitted with satellite telemetry collars, and followed throughout their annual range. Working with the U.S. Fish and Wildlife Service, we're also experimenting with glue-on and ear tag satellite transmitters, which can be deployed on adult male bears and younger, still-growing bears. Polar bears are tied to the sea ice for nearly all of their life cycle functions. Most important of these is foraging, or access to food. 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. Polar bears are not aquatic, however, and their only access to the seals is from the surface of the sea ice. Over the past 25 years, the summer sea ice melt period has lengthened, and summer sea ice cover has declined by over half a million square miles. In winter, although sea ice extent has not changed as greatly, there have been dramatic reductions in the amount of old ice, predominantly in the western Arctic. This loss of stable old ice has set up additional losses of sea ice cover each summer because the thinner younger ice is more easily melted during the recent warmer summers. You can read more about polar bear research, sea ice, and access current tracking maps of polar bears at on.doi.gov/PolarBearTracking Photo by: Steven Amstrup, USGS, 2001 |
Date | |
Source | A Mom and Her Cubs |
Author | Steven Amstrup, USGS – U.S. Geological Survey from Reston, VA, USA |
Licensing
[edit]This image was originally posted to Flickr by U.S. Geological Survey at https://flickr.com/photos/27784370@N05/27400492256 (archive). It was reviewed on 19 January 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the Public Domain Mark. |
19 January 2018
Public domainPublic domainfalsefalse |
This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.
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current | 20:30, 19 January 2018 | 5,202 × 3,526 (845 KB) | Artix Kreiger 2 (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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Orientation | Normal |
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Horizontal resolution | 440 dpi |
Vertical resolution | 440 dpi |
Software used | Adobe Photoshop CS Windows |
File change date and time | 2016-04-19T13:10:18-08:00 |
Exif version | 2.2 |
Date and time of digitizing | 09:24, 10 June 2004 |
Date metadata was last modified | 05:10, 19 April 2016 |
Copyright status | Copyright status not set |