Lab 4 Worksheet - Lab 4 Worksheet Population Biology Table...

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Lab 4 Worksheet: Population Biology Table 1: *Results will vary depending on the samples chosen by the computer. Day P. caudatum alone, cells/mL (from tt#1) P. aurelia alone, cells/mL (from tt#2) P. caudatum mixed, cells/mL (from tt#3) P. aurelia mixed, cells/mL (from tt#3) 0 2 2 2 2 2 10 12 12 8 4 30 52 22 34 6 50 86 22 68 8 56 94 14 78 10 56 100 8 90 12 56 96 4 92 14 58 98 0 96 16 56 98 0 98 Lab Questions: 1. Make a hypothesis about how you think the two species of paramecia will grow alone and how they will grow when they are grown together. I think that alone each will thrive, but together they will fight for nutrients and one will thrive over the other. 2. Explain how you tested your hypothesis. Each paramecia was grown separately and together, then the populations were averaged. 3. On what day did the Paramecium caudatum population reach the carrying capacity of the environment when it was grown alone? How do you know? Day 24, because it reached its highest number of 58, and then began to fall and level off at 56. 4. On what day did the Paramecium aurelia population reach the carrying capacity of the environment? How do you know? On day 10, because it reached its highest number of 100, and then began to fall and level off at 98. 5. Explain the differences in the population growth patterns of the two paramecium species. What does this tell you about how Paramecium aurelia uses available resources? Aurelia begins slowly, much like Caudatum, but by week 4 it begins to double its growth rate. It appears to use less resources per unit, and metabolizes at a higher rate.
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  • Winter '11
  • Dr.Keiter
  • Population Ecology, Interspecific competition, P. caudatum, P. aurelia

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