An introduction to the broad field of Chemical Ecology through survey, discussion and analysis of current and historical literature. Topics include a wide array of chemically-mediated ecological interactions in a variety of taxa. Studies that analyze the importance of the use of chemical signals for habitat selection, resource acquisition, reproduction, defense and social interactions are discussed. Students research topics in Chemical Ecology and present their findings in oral and written formats. Prerequisite: BIOL 208. CHEM 164 or 261 recommended. Credit cannot be obtained for both BIOL 434 and 534. Offered in alternate years.