November 21 - Pheromones- males are attracted to female sex...

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Pheromones- males are attracted to female sex pheromones, emitters in fields, can also catch males, used as biological control for animals/insects Cacti—introduced into Australia. Became established in east Australia, climates are similar to climates here—the cacti were pre-adapted and were successful, sexually and asexually (joints of cactus). They avoid regulators and become pests. To regulate them an herbivore from the US is introduced—moth, whose caterpillar (cactoblastis) eats the joints. These caterpillars mainly ate prickly pear cacti (not native plants), so they were effective—this is biological control. Rabbits introduced to Australia by England—eat crops, native plants, and herbs, then became pests. They were very difficult to control. A disease (myxomatosis) was used to control them (only infected the rabbits). Normal growth curve increase, reaches carrying capacity, and then levels off (S curve). Human population size regulations: killing each other (war), resources go down (famine), natural
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This note was uploaded on 01/30/2012 for the course BIO 311D taught by Professor Reichler during the Spring '08 term at University of Texas at Austin.

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November 21 - Pheromones- males are attracted to female sex...

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