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Pinnipeds. Means feather footed Seals, Sea Lions and Walrus. Cetaceans Toothed Whales Baleen Whales Dolphins Porpoises Endangered Sirenia Manatee Dugong Steller’s Sea Cow. Pinnipeds True Seals Fur Seals Sea Lions Walrus Mustelidae Sea Otters

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means feather footed seals sea lions and walrus

Pinnipeds

Means feather footed

Seals, Sea Lions and Walrus

marine mammals
Cetaceans

Toothed Whales

Baleen Whales

Dolphins

Porpoises

Endangered

Sirenia

Manatee

Dugong

Steller’s Sea Cow

Pinnipeds

True Seals

Fur Seals

Sea Lions

Walrus

Mustelidae

Sea Otters

River Otters

Exxon Valdez Oil Spill

Polar Bears

Marine Mammals

Introduction

general characteristics
General Characteristics
  • They are carnivores
  • They feed in the water
  • They rest and they give birth on land.
differences
Differences
  • SEALS SEA LIONS WALRUS
  • Found worldwide Pacific Ocean Arctic Ocean
  • No eternal ears eternal ears external ears
  • Crawl on land walk quadripedally walk quadripedally
  • Examples in our area;
  • Harbor seal none Ancient fossils
slide5

Sea Lions

and

Fur Seals

The Pinnipeds

Callorhinus ursinus

(northern fur seal)

True Seals

Phoca vitulina

(harbor seal)

Walrus

Odobenus rosmarus

(walrus)

true seals

True Seals

No External Ear Flaps

(Earless)

true seals7
True Seals
  • True seals have no external ears like those found on eared seals. 
  • Instead, only a small ear opening behind the eyes is visible.
how they swim
How they swim

The Crabeater Seal

  •   The furred hind flippers of true seals are shorter than those of the fur seals and sea lions, and extend behind their body to  provide propulsion when swimming.
color variation
Color Variation
  • The pups of most species have fluffy coats of a light color.
elephant seal
Elephant Seal
  • The short, furry front flippers act mainly as rudders when the seals are swimming and help with movement on land or ice. 
leopard seal
Leopard seal
  • True seals have hair but rely on a heavy layer of blubber to keep them warm. 
leopard seal12
Leopard Seal
  • Antarctic seals include the voracious leopard seal, which feeds on penguins and other sea birds.
ringed seal
Ringed Seal
  • Most common of seals
  • Found in Arctic seas
  • Few live in the Baltic Sea
  • Smallest species of seal
  • Skin is light to dark grey with dark spots ringed with white.
fur seals

Fur Seals

Ear Flaps

fur seals15
Fur Seals
  • Most sought after seal because of its soft coat
  • US annual catch of fur seals amounts to over $3.5 million
reproduction
Reproduction
  • Cows arrive at rookeries in July,
  • immediately join a harem and bear their young.
  • Cows mate again 1 - 2 weeks after the birth of the pup
fur seals17
Fur Seals
  • 1911 North Pacific Fur Convention Japan, Russia, Canada, and the US set a limit to the number of seals that can be harvested each year.
  • Hazards
  • Thousands are killed annually at their breeding grounds for fur.
  • Sharks
  • Killer whales
  • Parasitic round worms
  • Only Russia and the US can harvest 30,000 a year.
fur seals18
Fur Seals
  • Russia and the US give 15%
  • of their harvest to Japan
  • and 15% to Canada
  • US sealing is conducted by
  • the government.
fur seals19
Fur Seals
  • The money is deposited in the US Treasury
  • 70% of money is returned to the Alaskan gov’t.
  • 30% goes to the National Marine Fisheries Service
sea lion
Sea Lion
  • Sea Lions are mammals, or warm blooded animals which give birth, nurse their offspring, and must breathe air.
  • Sea Lions are also pinnipeds (feather-footed ) meaning they have finlike members for propulsion. They can walk on their four web like flippers.
sea lion22
Sea Lion
  • Roars Like a Lion
  • This marine mammal makes a roaring noise (hence its name), barks, and honks
sea lion23
Sea Lion
  • Habitats
  • Sea lion are highly gregarious on land and use the same sites for breeding, and resting year after year.
sea lion24
Sea Lion
  • Range:
  • North Pacific coastal waters, Alaska to Russia
  • In the breeding season, the males form territories on rocky, semi-exposed areas and beaches.

California Sea Lions Distribution

sea lion25
Sea Lion
  • Population
  • In 1961 About 270,000
  • In 1999 About 110,000
  • They are of no commercial value.
  • Steller sea lions have suffered a mysterious population decline of about two-thirds since the 1960s.
  • Possible culprits: pollution, disease, and competition from commercial fishing.
walrus

Walrus

Tooth Walker

tooth walker
Tooth Walker
  • Odobenus comes from the Greek "tooth walker," and refers to the walruses' method of pulling themselves up onto the ice with their long tusks.
walrus28
Walrus
  • The walrus lives in the Arctic. Despite this distant range, its long tusks, deeply wrinkled skin, and bristly mustache make the walrus familiar to all.
walrus description
Walrus description
  • Flat flippers, instead of feet enable the walrus to swim. The forelimbs serve as rudders.
  • Out of the water the walrus can walk almost upright on all fours by turning its back flippers forward.
  • When ice spreads and thickens into pack ice in the winter, walruses usually head south.
  • Walruses' blubber (fat) may be as much as 6 inches thick.
tooth walker30
Tooth Walker
  • Global Distribution
tooth walker31
Tooth Walker
  • Pacific Walrus Distribution
walrus man
  WALRUS & MAN
  • Eskimos have hunted the walrus for hundreds of years.
  • Traditionally they hunted using strong fishing lines.
  • Now they use high powered rifles. They can kill many more walruses.
  • In the last 300 years commercial hunters caught so many walruses that the species has become almost extinct.
walrus status
Walrus Status
  • There are now about 250,000 walruses in the Bering sea, but extinction is still a possibility because of their slow breeding rate and the fragile environment that they live in. Even though commercial hunting is no longer allowed, the walrus is still endangered.