Adaptations for Survival: Symbiosis, Camouflage, Mimicry...Symbiosis is Pervasive • The very...
Transcript of Adaptations for Survival: Symbiosis, Camouflage, Mimicry...Symbiosis is Pervasive • The very...
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OCN 201 Biology Lecture 10
http://www.berkeley.edu/news/media/releases/2005/03/24_octopus.shtmlhttp://www.oceanfootage.com/stockfootage/Cleaning_Station_Fish/
Adaptations for Survival: Symbiosis, Camouflage, Mimicry
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• Parasitism - negative effect on host
• Commensalism - no effect on host
• Mutualism - both parties benefit
Symbiosis
Often involves food but benefits may also include protection from predators, dispersal, or habitat
Prolonged interaction between individuals of two different species where at least one benefits
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ParasitesLeeches (Segmented Worms)
Nematodes (Roundworms)
Tongue Louse (Crustacean)
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Whale Barnacles & Lice
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Commensalism?
http://www.scuba-equipment-usa.com/marine/APR04/
http://magma.nationalgeographic.com/
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Commensalism?Indonesian Mimic Octopus
American Museum of Natural History
harlequin jawfish
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Mutualism
Cleaner Shrimphttp://magma.nationalgeographic.com/
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Symbiosis is Pervasive
• The very basis of all eukaryotes (whether protists, plants, animals or fungi) is a result of symbiosis
• In addition, every multicellular organism is supported by a diverse suite of beneficial microbes
Especially mutualism
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Example:The Human Microbiome
• Thousands of species of bacteria and fungi
• There are as many microbial cells in the body as human cells
• Provide functions that our cells cannot do themselves
Scientific American
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Passive Camouflage Countershading
http://www.nmfs.noaa.gov/pr/images/cetaceans/orca_spyhopping-noaa.jpg
Countershading coloration of the Caribbean reef shark© George Ryschkewitsch
JONATHAN CHESTER
SharksBirds
Mammals
Fish
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Passive Camouflage
http://www.cspangler.com/images/photos/aquarium/weedy-sea-dragon2.jpg
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Footage from BBC “Blue Planet” Series
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Adaptive Camouflage
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Active Behavioral Camouflage
http://www.berkeley.edu/news/media/releases/2005/03/24_octopus.shtml
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Active Behavioral Camouflage
http://www.berkeley.edu/news/media/releases/2005/03/24_octopus.shtml
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Camouflage by Accessorizing
Ghillie Suit
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Mimicry• Animals can gain protection (or even
access to prey) by looking like something they are not
• Many types of mimicry:
• Müllerian- two dangerous animals evolve to look similar
• Batesian- a non-dangerous animal evolves to look like something dangerous
• Agressive - a dangerous animal evolves to look like something non-dangerous
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Batesian MimicryPufferfish (poisonous)
Filefish (non-poisonous)
Evolved Physical mimicry
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http://www.rzuser.uni-heidelberg.de/~bu6/Introduction06.html
Batesian MimicryNudibranchs & Flatworms
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http://www.rzuser.uni-heidelberg.de/~bu6/Introduction06.html
Batesian MimicryNudibranchs & Flatworms
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Indonesian Mimic Octopus
Behavioral Mimicry
Alters its shape and behavior to mimic other animals
Flatfish
Lionfish
Sea snake
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Sabre-toothed Blenny
Cleaner Wrasse
Predator or parasite mimics something harmless!
Aggressive Mimicry
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Predator or parasite that mimics something harmless!Aggressive Mimicry
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Aggressive Mimicry©Anna DeLoach 2011
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Aggressive Mimicry
Video: Jose LachatMusik: Maia Wackernagelwww.wackernagel.chSchnitt: Claudius Buser