Bio Lab Report 1 Inter and Intraspecific Competition

Bio Lab Report 1 Inter and Intraspecific Competition -...

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William Byun Annie Huynh Kayla Kliger Alexander Sopp Population Biology and Interspecific Competition Abstract The experiment was to set up a simulation of two species with different methods for obtaining food. Based upon Gause’s experiment of two Paramecium species, we simulated the intraspecific and interspecific competition by having two groups compete. Isolating two similar fields of grass, 3x4 meters, each species would try to acquire their nutrients, Kidney beans, by using designated method of consumption. Group one, Spoons, would use their non-dominant hand to scoop the kidney beans and place it in their opposite hand. Group two, Chopsticks, would use chopsticks with their desired hand, and would pick or scoop the kidney beans into the opposite hand. After every 30 sec interval a new generation would begin. Generation zero would start with 200 beans scattered and at the end of each generation 40 more beans would be introduced. Reproduction was established as acquiring ten beans for one offspring or 15 for two. The minimum to survive was five kidney beans, subsequently eliminating those incapable of gaining substantial nutrients. Tracking each generation with births, deaths, and survivors we simulated intraspecific competition. Creating a third 3x4 meter, we placed Spoons and Chopsticks together to compare interspecific competition. Upon the end of the experiment, Spoons hit their capacity limit and forced the Chopsticks into extinction. This is a reoccurring event within interspecific competition.
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1. Introduction For Paramecium A (spoons), we predict that after the third or fourth generation the populations will stop increasing because resources will run out quickly. For Paramecium B (chopsticks), we predict that after the 5 th or 6 th generation, the populations will stop increasing because there will be more competition and less resources available per person. Those who survive will most likely be the ones most proficient at using chopsticks. For the intra-specific competition for both species, it followed a logistic growth model which differs slightly from our original hypothesis. For the inter-specific competition, the chopsticks species went extinct at the 10 th generation, while the spoon species survived. These results are very similar to what we predicted. In the 1930s, Gause performed an experiment that demonstrated the phenomena of inter
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Bio Lab Report 1 Inter and Intraspecific Competition -...

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