MARINE MAMMALS - PowerPoint PPT Presentation

Slide1 l.jpg
1 / 17

  • Updated On :
  • Presentation posted in: Pets / Animals

MARINE MAMMALS. Marine mammals are a class of animals (Mammalia) that are warm blooded and live most of their lives in the sea .

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

Download Presentation


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript

Slide1 l.jpg


Slide2 l.jpg

Marine mammals are a class of animals (Mammalia) that are warm blooded and live most of their lives in the sea

Slide3 l.jpg

Most people think of whales, dolphins and seals as the primary marine mammals. However, polar bears and sea otters, among others, also are classified as marine mammals

Slide4 l.jpg

To be classified as a mammal an animal must posses all five of these characteristics

Slide5 l.jpg

They have lungs and breath air

They do not use or have gills

Slide6 l.jpg

They are warm blooded and maintain a constant body temperature. 

Slide7 l.jpg

Most bear live young. One primitive mammal group, the Monotremes (which includes the duckbill platypus and the echidna) lays eggs.

Slide8 l.jpg

They produce milk and nurse their young.

Slide9 l.jpg

They have hair at some point in their lives. 

Slide10 l.jpg

Even dolphins, whales and porpoises posses hair around their mouths which is usually lost soon after birth.  If you look closely at some of these adult animals you can still see the raised follicles were the hair used to be.  

Slide11 l.jpg

All mammals are members of the "class" Mammalia.  Within this class are smaller subgroups called "orders".  Three of these orders are made up entirely of marine mammals.  They are the orders of Cetacea, Pinnipedia, and Sirenia.  A fourth order Carnivora contains both marine and land animals. 

Slide12 l.jpg

Cetaceans - whales, dolphins and porpoises

Slide13 l.jpg

Pinnipeds - seals, sea lions and walruses

Slide14 l.jpg

Sirenians - dugongs and manatees

Slide15 l.jpg

Carnivores - sea otters and polar bears

This group also includes dogs and their relatives, bears, raccoons, civets, hyenas, and cats

Slide16 l.jpg

Divergent Evolution

Similar origin, different environment, different features


Slide17 l.jpg

Convergent Evolution

Different origin, similar environment, similar features

  • Login