Lecture36 - BioNB 221 Lecture 36 Nov 18 2011 Lecture 36...

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BioNB 221: Lecture 36 Nov. 18, 2011 Lecture 36: Parasitism and Signal Evolution Professor Robert Raguso Required reading for today: “Fatal attraction in rats infected with Toxoplasma gondii”, M. Berdoy, J. P. Webster and D. W. Macdonald, Proc. R. Soc. Lond. B (2000) 267, 1591-1594. Learning Objectives - To appreciate the ubiquity of parasites as symbionts and selective forces in the evolution of most animals. - To survey the diversity of parasitic life cycles, in order to better understand the dynamics of transmission and the need to alter host behavior. - To explore the mechanisms by which parasites alter the behavior of their hosts, often with severe fitness consequences. What is a parasite?: An organism that derives some benefit through living in close association (internally or externally) with a second (host) organism, usually causing the latter some harm but not killing it. + / - relationship Intimate association: commensal if neutral, mutualistic if beneficial, predatory if
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This note was uploaded on 08/27/2011 for the course BIONB 2210 taught by Professor Seeley during the Fall '10 term at Cornell.

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Lecture36 - BioNB 221 Lecture 36 Nov 18 2011 Lecture 36...

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