TITLE

Effect of Climatic Warming on the Pacific Walrus, and Potential Modification of Its Helminth Fauna

AUTHOR(S)
Rausch, Robert L.; George, John C.; Brower, Harry K.
PUB. DATE
October 2007
SOURCE
Journal of Parasitology;Oct2007, Vol. 93 Issue 5, p1247
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The decreasing extent of sea-ice in the arctic basin as a consequence of climatic warming is modifying the behavior and diets of pagophilic pinnipeds, including the Pacific walrus, Odobenus rosmarus divergens Illiger, the species emphasized here. Mammals such as the walrus and bearded seal, Erignathus barbatus (Erxleben), cannot remain associated with the sea-ice, and continue to feed on their usual diet of benthic invertebrates inhabiting coastal waters to a depth of approximately 100 m, when the northwestward retreating ice reaches deep waters beyond the margins of the continental shelf. With reduction of their customary substrate (ice), the walrus has become more pelagic and preys more often on ringed seals, Phoca hispida Schreber. Dietary changes, with modifications of helminth faunas, may be induced by various factors. Increased consumption of mammals or their remains by walruses may lead to a higher prevalence of trichinellosis in them and to more frequent occurrence in indigenous peoples inhabiting the arctic coasts. To assess predicted effects on the composition of helminth fauna of the walrus, we recommend systematic surveys of their helminths as part of research on effects of climatic warming.
ACCESSION #
28038432

 

Related Articles

  • Longest recorded underwater dive by a polar bear. Stirling, Ian; Meurs, Rinie // Polar Biology;Aug2015, Vol. 38 Issue 8, p1301 

    The maximum dive duration for a wild polar bear ( Ursus maritimus) of any age is unknown, and opportunities to document long dives by undisturbed bears are rare. We describe the longest dive reported to date, by a wild undisturbed adult male polar bear. This dive was made during an aquatic stalk...

  • Melting Away. Walters, Jennifer Marino // Scholastic News -- Edition 5/6;12/7/2009, Vol. 78 Issue 10, p4 

    The article describes the threat posed by the melting of sea ice in the frigid Arctic region to the population and habitat of the Pacific walrus as of December 2009. In effect, it states, the disappearing ice leads in walruses gathering in large numbers of land. The melting is attributed by...

  • Melting Ice Displaces Walruses in the Russian Arctic.  // Sea Technology;Jan2008, Vol. 49 Issue 1, p65 

    The article reports on the migration of about 40,000 walruses due to the melting Arctic sea ice in the Russian Arctic. The scientists believe that the melting of Arctic sea ice is a result of global warming, and reveal the reduction of sea-ice thickness by 40% in the last 30 years. As such, the...

  • quick quiz.  // Scholastic SuperScience;Jan2007, Vol. 18 Issue 4, p9 

    A quiz concerning walruses and global warming is presented.

  • Polar opposites. Stock, Peter // Report / Newsmagazine (National Edition);1/20/2003, Vol. 30 Issue 2, p20 

    Discusses concern among scientists and lobbyists who deal with global warming about the melting of the Arctic ice cover. Expansion of sea ice in the Antarctic; Concerns that polar bears may drown if the ice melts; Changes in animal migration patterns due to weather changes; Regional warming...

  • UMIAK.  // Alaska Almanac;2006, Issue 30, p216 

    A definition of the term "umiak" is presented. It refers to a traditional skin-covered boat of Eskimos. Paddles are still used when stalking game and when ice might damage a propeller. Because umiaks must often be pulled long distances over pack ice, the boats are lightweight and easily...

  • FEELING the HEAT. Bogo, Jennifer // Audubon;Dec2003, Vol. 105 Issue 4, p56 

    Presents information on animals and plants in the Arctic region being affected by global warming. Effect of warmer Arctic springs on the musk oxen; Problems encountered by walruses due to the decreasing summer sea ice; Risks posed by climatic changes to the breeding of spectacled elder birds.

  • On Thin Ice. Kellaher, Karen // Scholastic News -- Edition 3;1/11/2010, Vol. 66 Issue 12, p2 

    The article focuses on the problem of walrus habitat destruction in the North Pole due to global warming.

  • Bearded seal.  // Encyclopedia of Animals;8/1/2017, p1 

    Bearded seals have thick fat to keep them warm in the icy waters of the Arctic. They are able to survive in temperatures colder than 22 degrees below zero Fahrenheit (30 degrees below zero Celsius). They have long, white, curly-tipped whiskers. These whiskers hang down like a beard.

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics