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Transcript 
Polar
Seas
Penguins
Imagine life at the north
pole...
In the polar regions...
 Life
congregates in the
polynas
 Open water area surrounded
by ice
Oxygen Content in Polar Water
High
Low
In the summer...
 Nearly
24 hours of sunlight
 Phytoplankton blooms
 Increased zooplankton (krill
predominant)
Whale Migration
 Gray
whales
migrate
14,000 miles
each spring to
Arctic
feeding
grounds
Polar Food Chains
 Short
– high productivity
and high population density
North Pole
 Ocean
ecosystem
 Tall, jagged icebergs
 Average temps
 Winter -30º
 Summer 32º
North Pole Animals
 Pinnipeds
 Seals,
sea
lions, walruses
 No penguins
 3 whale species
South Pole
 Land
ecosystem
 Smooth, flat ice cap
 Avg. temps
Winter -78 º
 Summer
-20 º
South Pole Animals
 Pinnipeds
 Penguins
 No
bears
Cetaceans
Shamu is really a dolphin!!
So are these…
2 Groups of Cetaceans
 Baleen
whales (mysticetes)
 Toothed whales
(odontocetes)
Baleen
 Like
hair and nails
 Fringed
 Why adapted for such
small food?
Compare fish and cetaceans…
 How
is fin structure and
motion different in
cetaceans?
Whale tail picture with
flukes
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