Animal Behavio3 - into responding to the benefit of the...

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Animal Behavior: Signaling and Communication Visual Signals Visual signals are limited because they require a direct line of sight and lighted conditions, and they only last as long as the sender is signaling. However, studies of communication have overemphasized visual communication, most likely because humans and primates are much more dependent on this type of communication than non-primate animals. We will not spend much time on visual signals because we are already familiar with them from our daily lives. The sender can send a signal by performing a display or by assuming a specific body posture. The receiver views the signal by means of eyes, which the brain translates into a visual image. Visual images are received in real-time, and so are generally dynamic signals. Visual signals allow for a certain amount of cheating; that is, deceptive signals can lure receivers
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Unformatted text preview: into responding to the benefit of the sender and the detriment of the receiver. Photuris fireflies are the only predatory species of firefly. By mimicking the female response of the prey species the "femme fatale" Photuris female lures in males, and then preys upon them. Wary males are careful in responding to female displays of their own species for fear of being preyed upon by the Photuris females. In this way, the prey males experience conflicting pressures from natural selection, which demands both individual survival and mating for species survival. This example reveals another problem with visual signals--they are not receiver specific. Any animal can potentially react to the visual signal of any species....
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This note was uploaded on 01/27/2012 for the course BIOLOGY BSC1005 taught by Professor Rodriguez during the Winter '09 term at Broward College.

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