Materials and Methods predator and prey

Materials and - The green obvious species had a high reproductive rate of 1.8 and the black camouflaged species had a lower rate of 0.8 and next

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Materials and Methods The lab centered around three experiments, each of which tested an individual faucet of the predator-prey relationship. The first of these tests was designed to determine the effects of natural selection on camouflaged species of equal birth rates. A student was used to represent the predator population and was tasked with gathering three colors of beads, some harder to see than others. All colors had a starting population of 20 and growth rate of 1.2 with each new generations’ population determined by the surviving number multiplied by the growth rate. The predator was able to “capture” prey for twenty seconds every generation. The second test observed the tradeoff between the vulnerability to predation and the reproductive rate. This was achieved by using two different color beads, one much harder to see than the other, and giving the less obvious species a much lower reproductive rate.
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Unformatted text preview: The green, obvious species had a high reproductive rate of 1.8 and the black, camouflaged species had a lower rate of 0.8 and next generations populations were determined in the same manner as the first test. Each species started with 15 individuals. The predator once again had twenty seconds to “hunt”. The final test attempted to model a full predator-prey relationship using variable populations for both the student and the beads being collected. In this test a single color of bead with reproductive rate of 1.6 and starting population of 30 was “eaten” by a single student who had twenty seconds to start with but on each successive generation had the number of captured prey divided by 0.5(predator reproductive rate) seconds. In each experiment the data was placed into pre-made tables then compiled in Microsoft Excel and made into graphs to express the data. All methods based on Predator/Prey (2006)....
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This note was uploaded on 09/07/2009 for the course BIO 1B taught by Professor Carlson,mischel,power during the Spring '07 term at University of California, Berkeley.

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