Animal Behavio4 - Animal Behavior: Signaling and...

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Animal Behavior: Signaling and Communication Signal Types: Mechanisms and Relative Advantages Chemical Signals All forms of life must selectively detect and take in chemicals, and so chemical signaling occurs at many levels in all cells. Hormones operate within an organism, pheromones are signals between conspecifics, and allomones are intended for interspecies communication. In this section we will focus on pheromones. Two different systems of reception are employed for chemical communication. Airborne and waterborne chemicals received at a distance from their source are detected by olfactory reception, or smell. Other chemicals require contact reception, direct contact of the receiver with the source of the pheromone. Pheromones are usually produced by glands located on the skin, or by ducts within the body that have ducts leading to the body's exterior; the second variety of glands are known as exocrine glands. Mammals produce pheromones in the sudiferous (fluid- producing) gland and the sebaceous (waxy-substance producing) gland. Some mammals have
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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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