Marine Mammals. Pinnepeds  Pinnepeds are marine mammals that have flippers and blubber, that need to breed on land.  Seals, Walruses, and Sea Lions.

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Presentation transcript:

Marine Mammals

Pinnepeds  Pinnepeds are marine mammals that have flippers and blubber, that need to breed on land.  Seals, Walruses, and Sea Lions all belong to this Order.

Pinnepeds live in cold water, they have a thick layer of blubber to keep them warm. They are mostly carnivores and feed on squid and fish. They have streamlined bodies and are excellent swimmers. Seals are the largest group of pinnepeds

Seals  They are hunted for their fur and are protected by the Marine Mammal Protection Act of  There are approximately 19 species of Seals.

Sea Lions  Are also called Eared Seals, because they have external ear flaps.  They can move their rear flippers forward to walk.  They are graceful and agile swimmers.

Walruses  Have large protruding tusks for digging up mollusks. They love to eat clams!  They are the largest Pinneped, weighing up to 2700 lbs!

SEA OTTERS

Evolution of today’s sea otter  2 million years ago…Enhydra lutris

Humans like sea otters

Sea otters eat a lot of meat

Work of a keystone predator

Otters love urchins  There are kelp forests because there are otters

Kelp forest stability  Human hunting changes the kelp forest structure

Russians get lost in Alaska  Russians discover Alaskan wildlife in 1741

Sea otter genocide  Otters previously only hunted for warmth and food

The massacre continues  Demand for otter fur grows throughout the world

The process of skinning The fleshy pieces still attached to the fur are scraped off delicately so as not to cut into the fur

The last of the otters  150 years after excessive hunting, people realize a mistake has been made

Otters repopulate the world  Miraculously, otter population has not been too far reduced for regrowth

Ignorant violence  Californians deliberately murder protected sea otters

Otters are loved  Despite rare deaths, otters now cherished in many parts of the world

A great fall  Whales, seals, sea lions, sea otters

The threat of extinction  Can the sea otter still go extinct?

Polar Bears  Is the second member of the order Carnivora that is a Marine Mammal.  They are semi aquatic, and inhabit both the land and the sea.  They feed primarily on seals.  They have recently been put on the endangered species list because of loss of habitat due to global warming.