Pollination, Crypsis, Aposematic Coloration, and Mimicry
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Transcript of Pollination, Crypsis, Aposematic Coloration, and Mimicry
Pollination, Crypsis, Aposematic Coloration, and Mimicry
2-22-05
pollinationTo transfer pollen from an anther to a stigma
anther
stigma
Orchid bees are both beautiful and good pollinators.
Aposematic colorationconspicuous coloration or markings of an animal serving to warn off predators
Chinese Red-bellied Newt
Chinese Red-bellied Newt
If an animal has a dull back and bright undersides, the Unken Reflex may be used. They flash the bright colors, and frighten the predator.
CrypsisCamouflage; blending in with surroundings
Killdeer on nest
The Fer-de-Lance relies on crypsis.
VALUE OF COUNTERSHADING
• Many aquatic/marine animals are dark on top and light on the bottom. This is so predators approaching from the top see a dark back against a dark background, and predators from below see a light venter against a light sky.
mimicrythe resemblance of an animal species to another species or to natural objects; provides concealment and protection from predators
TYPES OF MIMICRY
• Batesian mimicry: The model is poisonous/venomous, and the mimic is harmless.
• Müllerian mimicry: The model is poisonous/venomous, and the mimic is, too.
The mimic - Milk snake - non-venomous
The model - Coral snake - venomous
BATESIAN MIMICRY
MORE NON-VENOMOUS BATESIAN MIMICS
ANOTHER BATESIAN MIMIC.
Mimicry is favored by selection and passed on to future generations (evolution)