Threats to Narwhals
Now that we've become acquainted with this arctic whale, you might be sad to know that, like many animals, it's under threat. Let's take a look at the culprits.
Inuit hunters are allowed to hunt a certain number of narwhals a year, in accordance with their traditions and culture. Some modern hunters use the traditional harpoon, but many hunters in the younger generations carry rifles. Often, hunters shoot a narwhal only to have it sink dead to the ocean floor or escape wounded. Some countries have rules against the import and sale of items like narwhal ivory, but many more nations are happy to encourage the trade. Inuit hunters can make a pretty penny off a narwhal tusk -- in August 2007, about $125 per foot [source: Nicklen]. Double tusks go for even more, sometimes several thousands of dollars. In an area where there aren't many jobs, this money is important.
But the narwhal isn't important just because of its tusk. Inuits dine on the top layer of skin and blubber, called muktuk or maktaaq, for vitamin C, a scarce commodity in those parts. Eating the marine mammals has become dangerous for the Inuit peoples, however -- levels of PCBs and mercury in animals around the ice cap have been found to be very high [source: Cone].
Another factor worrying scientists who study the whale is climate change. Because narwhals are so wedded to their pack ice environment, changes in sea ice have a huge impact on their migration patterns and survival. If the ice is too thick, narwhals can get trapped under it. And if they can't surface, the whales can't breathe. If the ice is too thin, predators may find it easier to hunt them, and the narwhals' fishy prey might move elsewhere. One scientist labeled the narwhal "the marine mammal least likely to survive melting ice floes" [source: NPR].
We don't even know how many narwhals there are in the world. Aerial surveys can only tell us so much. Not knowing how many narwhals there are makes it harder to figure out how many we have left and how many are disappearing. Environmentalists decry hunting quotas imposed by the government as too high. Even with the numbers we do have, the number of narwhals that are killed only to sink don't factor in. And by the time we figure out whether or not climate change is killing them, it might be too late to do anything but watch.
For more articles about stuff you might like, like baleen whales, animal migration and cool animal facts, try the next page.
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More Great Links
- "Arctic Marine Mammals on Thin Ice." ScienceDaily. April 26, 2008. http://www.sciencedaily.com/releases/2008/04/080423154558.htm
- Bobechko, Liann and Steve Stockton. "Mystery of the Narwhal Tusk." Alternatives Journal. 2006. Vol. 32, Issue 1. page 4.
- Bruemmer, Fred. "Northern Oases: Polynyas, Where Arctic Waters Teem with Wildlife." Canadian Geographic. Jan./Feb. 1994.
- "Communication and Echolocation." SeaWorld. http://www.seaworld.org/infobooks/Bottlenose/echodol.html
- Cone, Marla. "Dozens of Words for Snow, None for Pollution." Mother Jones. Jan./Feb. 2005, Vol. 30, No.1, pp. 60-67. http://www.motherjones.com/news/feature/2005/01/12_402.html
- Culik, Boris. "Monodon monoceros (Linnaeus, 1756)." Whales & Dolphins. Convention on Migratory Species. http://www.cms.int/reports/small_cetaceans/data/M_monoceros/m_monoceros.htm
- Eilperin, Juliet. "Scientists Enlist Nature's Divers to Sample Icy Sea." The Washington Post. April 16, 2007.
- Ferdinand, Pamela. "A Flexible, 9-Ft. Whale Tooth With Super-Sensing Power?" National Geographic. Dec. 13, 2005. http://news.nationalgeographic.com/news/2005/12/1213_051213_narwhal_tooth.html
- Garde, Eva et al. "Age-specific Growth and Remarkable Longevity in Narwhals (Monodon monoceros) from West Greenland as Estimated by Aspartic Acid Racemization." Abstract. Journal of Mammalogy. February 2007. Volume 88, Issue 1.
- Geddes, Linda. "What's the point of the narwhal's tusk?" New Scientist. Dec. 24, 2005-Jan. 6, 2006. Vol. 188 Issue 2531/2532. page 6.
- Grady, Wayne. "A Natural History of an Arctic Eden." Equinox. Feb./March 1999, pp 68-75.
- Holing, Dwight. "The Sound and the Fury: Debate Gets Louder over Noise Pollution and Marine Mammals." The Amicus Journal. Fall 1994, pp. 18-23.
- "Humans and Dolphins: If Brain Size Is a Measure, We're Not That Different." National Science Foundation. NSF News. Oct. 27, 2004.
- Jefferson, Thomas A. et al. "FAO Species Identification Guide: Marine Mammals of the World." United Nations Environment Programme. Food and Agriculture Organization of the United Nations. 1993. ftp://ftp.fao.org/docrep/fao/009/t0725e/t0725e10.pdf
- Johnson, Genevieve. "Seeing with Sound -- Echolocation." Log Transcript. The Voyage of the Odyssey. PBS. http://www.pbs.org/odyssey/odyssey/20011207_log_transcript.html
- Jozefowicz, Chris. "Sensitive Tooth." Current Science. Nov. 3, 2006. Vol. 92, Issue 5, page 4.
- Laidre, Kristin L. et al. "Diving behaviour of narwhals (Monodon monoceros) at two coastal localities in the Canadian High Arctic." http://www2.dmu.dk/1_Om_DMU/2_Afdelinger/3_AM/4_Expertise/5_Research/6_marine_mammals/Litterature_pdf/narhval.pdf
- Milius, Susan. "That's One Weird Tooth." Science News. March 25, 2006. Vol. 169, Issue 12. p. 186.
- "Narwhals May Produce Signature Vocalizations for Communications." ScienceDaily. Oct. 2, 2006. http://www.sciencedaily.com/releases/2006/09/060929094049.htm
- "Narwhals Aid Climate Change Study." Associated Press. Discovery. Discovery News. April 20, 2007.http://dsc.discovery.com/news/2007/04/20/narwhal_ani.html?category=animals&guid=20070420174530&dcitc=w19-506-ak-0001
- Narwhal Tusk Discoveries Web site. http://www.narwhal.org/index.html
- Nicklen, Paul. "Arctic Ivory: Hunting the Narwhal." National Geographic. August 2007. Vol. 212, Issue 2.
- Nielsen, John. "Scientists Plumbs Purpose of Narwhal's Horn." NPR. Dec. 13, 2005. http://www.npr.org/templates/story/story.php?storyId=5050264
- Nielsen, John. "Warming Waters Threaten 'Unicorns of the Sea.' NPR. May 11, 2008. http://www.npr.org/templates/story/story.php?storyId=90359659
- "Odontocetes -- Toothed Cetaceans." The Hebridean Whale and Dolphin Trust. (July 31, 2008) http://www.whaledolphintrust.co.uk/whales_dolphins/odontocetes-toothed-cetaceans.asp
- O'Meara, Stephen James. "A Tooth with a Twist." Odyssey. November 2007. Vol. 16, Issue 8. p. 49.
- Pfeiff, Margo. "Narwhal hunters." Canadian Geographic. Sept./Oct. 2006. Vol. 126, Issue 5.
- Stewart, D. Bruce. "Assessment and Update Status Report on the Narwhal Monodon monceros in Canada." Committee of the Status of Endangered Wildlife in Canada. Canadian Wildlife Service. 2004. http://dsp-psd.pwgsc.gc.ca/Collection/CW69-14-420-2005E.pdf
- "The Review of Significant Trade in the Narwhal (Monodon monoceros): A briefing by WDCS for the 20th meeting of CITES Animals Committee." CITES. http://www.cites.org/common/com/ac/20/E20-inf-09.pdf