BIOL 12100 Lecture Notes - Lecture 23: Pisaster, Aposematism, Coevolution
31 Aug 2018
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Tours: predation, mutual selective pressures that favor each organism, predators: have claws, teeth , will hunt in packs, prey avoidance adaptations: i. ii. poison - monarch butterfly have cardiac poison that they got from eating milkweed as caterpillars. Plants will protect themselves from herbivores by releasing chemical toxins. Educable defense: cyclic changes in population size. Phase with each other: heterogeneity increases stability in these cycles, optimal foraging strategies- would expect predator to maximize net benefit, bluegill and daphnia experiment. The observed diets of the fish were close to optimal diet conditions: predation/competitive interactions i. ii, predator eats dominant competitor - paine. On the pacific coast in us he was looking as starfish pisaster (likes to eat muscles) 1859 24 european rabbits were introduced to australies. By 1900- hundred of millions of rabbits: these rabbits destroyed sheep grazing lands and native plants.
