Biology 570
Questions for Park 1948

UPLOAD YOUR ANSWERS TO BLACKBOARD BEFORE CLASS

Bring your answers in typed form to class. Leave yourself space to annotate your answers during the discussion. You will be graded on both your typed answers and annotations.

Be sure that what you hand in reflects your understanding at the end of the discussion

  1. What is an imago and how does it differ from a larva or pupa? Look at "Metamorphosis" and "imago longevity" on p 268.

  2. Looking at Table 1 and the "Experimental Design" section.

    1. What kinds of controls were used in this experiment? Were they adequately replicated?
    2. What was the average duration of the controls in years, and how does it compare to the lifespan of the organism?
    3. What are the differences and similarities among the I, II, and III treatments?
    4. Looking at Figures 1, 2, 8 and Table 12, was there any reason to have all of the I, II, III conditions or would one have sufficed? Why or why not?

  3. What is the "sterile" treatment in Table 1?
    1. From Figure 4, was there any difference between the sterile treatment and the equivalent nonsterile? If so, what was the difference?

  4. From Table 10 how does the average population density of Tribolium confusum compare to the average density of Tribolium castaneum in single species culture? Do these averages match your impression from the graphs? Why or why not?

  5. From Table 1

    1. What were the competition treatments?
    2. Were they adequately replicated?
    3. How long did they run in years and what is this in units of lifespans of the animals concerned?

  6. Look at Table 14

    1. Is there a clear winner between the two species? How did you decide?
    2. Does the outcome of competition depend upon the initial starting population size? In what way? How did you decide?
    3. Does the outcome of competition depend on parasitism? In what way? How did you decide?
    4. What columns of data in the table were most useful in deciding your responses to b,c,d?

  7. From the Discussion on pp 304-305

    1. What are the mechanisms of interaction between the species proposed by Park?
    2. Do they seem plausible?
    3. What additional evidence would be needed to test them?
    4. In what ways did Park succeed or fail in the goals set out in the introduction?