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Sea Otter : An Endangered / Threatened Animal

Sea Otter : An Endangered / Threatened Animal. Mayumi Oda ESL099.3131 Professor Yin May 27, 2008 Photo Object; http://www.turtletrack.org.htm. Description Sea Otter = Enhydra Lutiris (Silverstein, p.9)

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Sea Otter : An Endangered / Threatened Animal

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  1. Sea Otter: An Endangered / Threatened Animal Mayumi Oda ESL099.3131 Professor Yin May 27, 2008 Photo Object; http://www.turtletrack.org.htm

  2. Description Sea Otter = Enhydra Lutiris (Silverstein, p.9) • The male’s weight is 70-90 lbs. (32-41 kg) and 4.5 ft long (1.4 m). • The female’s weight is 40-60 lbs. (18-27 kg) and 4.5 ft long (1.4 m). (Schneider)

  3. Description (continue) Fur • The thickest and finest fur. • The function is to protect sea otter from cold water(Siverstein, p.14). Big appetite • The amounts of food equal 1/4 of the weight each day. • Because of holding energy to keep the body warm(Silverstein p.11 and p.20).

  4. Life History Reproduction • Spring→ it is easier to raise the pup. • A pup is born 4 - 6 months after mating. • The female can have a pup by 3 – 4 years old(Silverstein p.30). Parenting • Only female takes care of the pup. • The pup spend most time on on the mother’s chest. (Silverstein, p.p 30-32) http://olympiccoast.noaa.gov

  5. Life History (continue) Parenting • 1 or 2 months age: starts eating solid foods. • 6 - 12 months age: becomes independent (Silverstein, p.p 30-32). Life Activity Male sea otter • Raft: a small group of only males. • Traveling more than 50 miles. Female sea otter • Not going far away from the birthplace. (Silverstein, p.27) Sea otter’s life span is 15 to 20 years. (Schneider)

  6. Past distribution Pacific ocean all over the world except Oceania (Silverstein, p.17) Current distribution Relocation of sea otters ↓ The Pacific Coast in Alaska and British Columbia, and Washington. | | The area where a few people live in （Silverstein, p.p 41-45） Distribution

  7. Habitat Sea otter is a sensitive animal • Shallow (50 to 75 feet depth) • Islands, rocks, reefs, and underwater kelp. • Abundant food(Silverstein, p.p 17-19) http://www.amnh.org/

  8. Reasons for Endangered Decreasing the population 900,000 northern sea otters and 100,000 to 200,000 southern sea otters were killed by people (Silverstein, p.14)

  9. Reasons for Decline • Shark Problem Most dangerous enemy (Martin, p.p28-31) • Gill Nets Sea otters are trapped in the net, and they drown (Martin, p.p28-31). http://www.glf.dfo-mpo.gc.ca

  10. Oil Threat Oil spills from tanker into sea ↓ Sea otters cannot survive (Martin, p.p28-31) 4.Fur Hunting A lot of sea otters were killed by people because of the fur (Martin, p.p28-31) http://www.alaska-in-pictures.com/

  11. Conservation Federal level • Russia, Japan, the U.S. and the UK signed a fur treaty(Silverstein,p.14). States level • California states banned the use of gill nets(Glick). Individual level • Many volunteers rescues sea otters when oil spilled into sea(Silverstein, p.53).

  12. Conflict with People Big appetite of sea otter ↓ Damage to the harvest of fishermen ↓ Compete between people and sea otters ↓ Fishermen kill sea otters (Silverstein, p.p46-48) Interaction between Kelp and Sea Otters The increase of sea otters || The increase of kelp || It is important for fishermen (Silverstein, p.p19-20) Prospect

  13. Personal Thoughts • People have responsibility to protect sea otter. • Nobody has the right to deprive other animals’ habitat. • People should understand how they affect the other animal’s lives. • People can coexist with sea otters without hurting each other.

  14. Works Cited Glick, Daniel. “Back from the Brink.” Smithsonian. Sep. 2005: 54-63. AcademicSearch Premier. EBSCOHost. LaGuardia Community Coll. Lib., Long Island City, NY. 2 April 2008 <http://rpa.laguardia.edu:2048/login?url=http://search.ebscohost.com/login.aspx?direct=true&db=aph&AN=18018965&site=ehost-live>. Martin, Marlene. “Endangered, Threatened, or Thriving? The California Sea Otter.” Environment. September 1983: 28,5. Academic Search Premier. EBSCOHost. LaGuardia Community Coll. Lib., Long Island City, NY. 2 April 2008 <http://rpa.laguardia.edu:2048/login?url=http://search.ebscohost.com/login.aspx?direct=true&db=aph&AN=5210478&site=ehost-live>. Schneider, Karl. “Sea Otter.” Alaska Department of Fish and Game. 1994: 10 April 2008 <http://www.adfg.state.ak.us/pubs/notebook/marine/seaotter.php>. Silverstein, Alvin, Virginia Silverstein, and Robert Silverstein. The Sea Otter:Alvin, Virginia, and Robert Silverstein. Brookfield, Connecticut: The Millbrook Press, 1995.

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