Parasite outline09

Parasite outline09 - BSCI 106 Dr. Sara Via Fall, 2009 p. 1...

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Fall, 2009 p. 1 Dr. Sara Via Lecture 8: Parasite Ecology and Evolution A. What is parasitism? 1. +/- interaction 2. Unlike predation, parasite doesn’t kill host 3. Parasites depend on host to complete (usually complex) life cycle B. Parasitism - Examples 1. Mistletoe 2. Cuckoos 3. Parasitoid wasps C. Why is parasitism interesting? 1. Parasite lifestyle entails amazing modifications 2. Red Queen hypothesis - Parasites evolve betterways to exploit host -Host evolves defense against new parasite tricks 3. can cause differential reproduction/survival (i.e., natural selection) 4. Life cycle can be complex with very specific adaptations D. Parasites and Human Health 1. Malaria – 595-6, Web Animation on Mastering Biology -Protozoan that infects 300 million people and causes 2 million deaths per year 2. African Sleeping sickness, -Transmitted by Tsetse flies – cattle intermediate host , 3. Chaga’s disease -Also a protozoan, fatal if untreated
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Parasite outline09 - BSCI 106 Dr. Sara Via Fall, 2009 p. 1...

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