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SEA OTTERS Life and Death. Major Objectives Sea otter evolution Relationship between sea otter and man Sea otter’s role as a keystone predator Sea otters.

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Presentation on theme: "SEA OTTERS Life and Death. Major Objectives Sea otter evolution Relationship between sea otter and man Sea otter’s role as a keystone predator Sea otters."— Presentation transcript:

1 SEA OTTERS Life and Death

2 Major Objectives Sea otter evolution Relationship between sea otter and man Sea otter’s role as a keystone predator Sea otters and kelp forests Sea otter futures

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

4 Humans like sea otters

5 In the beginning…

6 A simple and complex life  Food, shelter, breed, avoid being eaten

7 Sea otters eat a lot of meat

8 Work of a keystone predator

9 Keystone predator in action

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

11 Kelp forest stability  Human hunting changes the kelp forest structure

12 The first otter kill  ya, otters become an easy target

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

14 Sea cow is easy meat  Last few thousand steller’s sea cows on the planet have a hard time of it

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

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

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

18 What the otters used fur for…  Otters can spend 50% of daylight hours cleaning their fur

19 A daily life of peril Otters can die from the cold

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

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

22 Otter death still occurs  Aleutians demand cultural hunting rights back

23 Ignorant violence  Californians deliberately murder protected sea otters

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

25 A new threat emerges  In 1991, first killer whale attack on Alaskan otter is witnessed

26 Otter killer  3 killer whales, 3-6 otters a day, ten years

27 Whale killer  The reasons why

28 Red for murder

29 Solutions to the problem  No solution except the impossible

30 Cetacean populations

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

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

33 A sign of things to come  Ripple effects

34 Rise and fall  The sea otter’s life history has been shaped by human greed

35 Sea otter today  A different relationship currently exists


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