What is a “search image”? How does that affect the predator? What does the prey do to use it in his favour?
What is a “search image”? What is the advantage for the predator? What does the prey do against the formation of a search image?
The predator learns a search image -> energy saving
Polymorphic Coptic oloration (cryptic +different from others)
Polymorphic cryptic colouration
Cryptic+ different from others
Prevents of search image formation.
Polymorphism maintained by negative frequency dependent selection.
Adaptation mechanisms
Enhancing camouflage (crypsis)
disruptive colouration
Countershading
Masquerade
Aposematism (warning Color)
mimic toxicity
Müllerian mimicry
Promotes uniformity
Rare organisms should evolve to mimic more common organisms.
Easier for predator to learn one image.
Bateson mimicry
Promotes polymorphism
Preadators learn to avoid noxious prey.
Prey mimics toxic organism.
Allocation cost
Trade-off in prey Defense
Total energy needs to be distributed/allocated
Depends on predation pressure
E.g. if larvae more toxic -> adult less toxic (costs of toxicity affect larval growth)
Opportunity cost
Habitat choice based on crypsis
Signaling to mates and rivals
Red queen
Co-evolution
Both parties change but relative success remains constant.
Zuletzt geändertvor einem Jahr