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Marine Mammals

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Title: Slide 1 Author: andersons Last modified by: cestest Created Date: 5/14/2003 2:10:04 PM Document presentation format: On-screen Show Company – PowerPoint PPT presentation

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Title: Marine Mammals


1
Marine Mammals
2
What makes a mammal, a mammal?
3
How are marine mammals different from fish?
Similar?
4
Order Cetacea
  • Baleen whales
  • Toothed whales
  • Inc. dolphins and porpoises

5
Baleen
  • Like hair and nails
  • Fringed
  • Why adapted for such small food?

6
Compare fish and cetaceans
  • How is fin structure and motion different in
    cetaceans?

7
Whale tail picture with flukes
8
How do cetaceans breathe?
  • Through blowhole
  • Forces air out first spout

9
Adaptations (1 hour underwater!)
  • Large lungs
  • Higher blood O2 capacity
  • Max O2 to brains

10
Whale Species
  • Orca whales (aka killer)
  • Sperm whale (largest toothed)
  • Blue whale (largest whale baleen)

11
Pinnipeds
  • Seals, sea lions, walruses
  • Flipper-like limbs
  • Hind flippers like flukes
  • Cold water regions

12
Pinnipeds
  • Come ashore to rest, mate, bear young
  • Most seals cant use limbs on land

13
Seal vs. Sea Lion
  • Sea lions are seals with external ears
  • Sea lion can sit on front limbs

14
Walruses
  • No external ears
  • Can use limbs on land
  • Tusks (long canine teeth)

15
Otters
  • Related to weasels and skunks
  • 4 limbs
  • Webbed paws and flat tails

16
Duck-billed Platypus
  • Egg-laying mammal
  • Flat beak grubs for worms

17
Sea Cows
  • Manatees and dugongs
  • Flipper-like forelimbs, remnants of hind limbs
  • Large tail fluke
  • Plant eaters

18
Coral snake
19
Scarlet Kingsnake
20
Kingsnake
21
Raccoon
22
Mink
23
River Otter
24
Beaver
25
Nutria
26
Muskrat
27
Water Shrew
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