SEA OTTERS Life and Death. Major Objectives Sea otter evolution Relationship between sea otter and...
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Transcript of SEA OTTERS Life and Death. Major Objectives Sea otter evolution Relationship between sea otter and...
SEA SEA OTTERSOTTERS
Life and Life and DeathDeath
Major ObjectivesMajor Objectives
Sea otter evolutionSea otter evolution
Relationship between sea otter and manRelationship between sea otter and man
Sea otter’s role as a keystone predatorSea otter’s role as a keystone predator
Sea otters and kelp forestsSea otters and kelp forests
Sea otter futuresSea otter futures
Evolution of today’s sea otterEvolution of today’s sea otter
2 million years ago…2 million years ago…Enhydra lutrisEnhydra lutris
Humans like sea otters Humans like sea otters
In the beginning…In the beginning…
A simple and complex lifeA simple and complex life
Food, shelter, breed, avoid being eatenFood, shelter, breed, avoid being eaten
Sea otters eat a lot of meatSea otters eat a lot of meat
Work of a keystone predatorWork of a keystone predator
Keystone predator in actionKeystone predator in action
Otters love urchinsOtters love urchins There are kelp forests because there are ottersThere are kelp forests because there are otters
Kelp forest stabilityKelp forest stability
Human hunting Human hunting changes the kelp changes the kelp forest structureforest structure
The first otter killThe first otter kill
8-9000 ya, otters 8-9000 ya, otters become an easy become an easy targettarget
Russians get lost in AlaskaRussians get lost in Alaska
Russians discover Russians discover Alaskan wildlife in Alaskan wildlife in 17411741
Sea cow is easy meatSea cow is easy meat
Last few thousand Last few thousand steller’s sea cows on steller’s sea cows on the planet have a the planet have a hard time of ithard time of it
Sea otter genocideSea otter genocide
Otters previously only hunted for warmth and foodOtters previously only hunted for warmth and food
The massacre continuesThe massacre continues
Demand for otter fur grows throughout the worldDemand for otter fur grows throughout the world
The process of skinningThe process of skinning
The fleshy pieces still attached to The fleshy pieces still attached to the fur are scraped off the fur are scraped off delicately so as not to cut into delicately so as not to cut into the furthe fur
What the otters used fur for…What the otters used fur for…
Otters can spend 50% of daylight hours cleaning their fur Otters can spend 50% of daylight hours cleaning their fur
A daily life of perilA daily life of peril
Otters can die from the cold
The last of the ottersThe last of the otters 150 years after excessive hunting, people realize a 150 years after excessive hunting, people realize a
mistake has been mademistake has been made
Otters repopulate the worldOtters repopulate the world
Miraculously, otter population has not been too far Miraculously, otter population has not been too far reduced for regrowthreduced for regrowth
Otter death still occursOtter death still occurs
Aleutians demand Aleutians demand cultural hunting rights cultural hunting rights backback
Ignorant violenceIgnorant violence
Californians deliberately murder protected sea Californians deliberately murder protected sea ottersotters
Otters are loved Otters are loved
Despite rare deaths, Despite rare deaths, otters now cherished otters now cherished in many parts of the in many parts of the worldworld
A new threat emergesA new threat emerges
In 1991, first killer whale attack on Alaskan otter In 1991, first killer whale attack on Alaskan otter is witnessedis witnessed
Otter killerOtter killer
3 killer whales, 3-6 otters a day, ten years3 killer whales, 3-6 otters a day, ten years
Whale killerWhale killer
The reasons whyThe reasons why
Red for murderRed for murder
Solutions to the problemSolutions to the problem
No solution except the impossibleNo solution except the impossible
Cetacean populationsCetacean populations
A great fallA great fall Whales, seals, sea lions, sea ottersWhales, seals, sea lions, sea otters
The threat of extinctionThe threat of extinction Can the sea otter still go extinct?Can the sea otter still go extinct?
A sign of things to comeA sign of things to come
Ripple effectsRipple effects
Rise and fallRise and fall
The sea otter’s life The sea otter’s life history has been history has been shaped by human shaped by human greedgreed
Sea otter todaySea otter today
A different A different relationship relationship currently existscurrently exists