homework+quiz

1) Read Bonduriansky et al (2008)

a) For the following three polygamous mating systems, discuss whether or not you would predict that

males would follow the disposable soma model. Be sure to justify your answer.

i) Resource Defense

ii) Lekking

b) For the following two polyandrous mating systems, discuss whether or not you would predict that

females would follow the disposable soma model. Be sure to justify your answer.

i) Fertility Insurance

ii) Material Benefits

2) Read Fagen & Fagen (2004)

a) Which of the three types of play we discussed in class was exhibited by the bears. Explain your

answer.

b) What are the costs of play in bears? Explain why in these cases play is costly.

c) Based on this paper, if you were to study the benefits of play in whales, what time frame would you

use? Justify your answer.

3) Read Lampert (1989)

a) What are the main factors that drive diel vertical migration?

b) How do these factors compare to season migration patterns we discussed in class?

c) Read Nesbitt et al (1996).

Which of the hypotheses mentioned in Lambert (1989) best match the findings of Nesbitt et al (1996)?

4) Read Towsend et al. (1984) and:

a) Describe two variables you would measure to help explain why males care for the eggs

b) Describe why these would be important.

c) Describe what you would expect to find if you were to measure these variables.

5) a) Suppose you find a population of fish in a pond that exclusively feeds on a snail. You notice that on

one side of the pond (Patch A) there are 224 snails and the other side (Patch B) there are 112 snails. You

count 60 fish in the pond. According to the Ideal Free Distribution (IFD) model, how many fish will be in

patch A and Patch B? Explain your reasoning.

Read pgs 1‐7 in Tregenza (1995) and answer the following questions.

b) What is the effect of interference on the IFD model?

c) Suppose you notice only 34 fish in Patch A. what is the interference constant in this

population? (Show your work)

Read Abrahams (1986)

d) Suppose the water of the pond is murky. How could you explain the fact that there were 34 fish in

patch A based on the Abrahams (1986) model?

6) Suppose you find a population of fish in a pond that exclusively feeds on a snail. You notice that on

one side of the pond (Patch A) there are 224 snails and the other side (Patch B) there are 112 snails. You

count 60 fish in the pond. According to the Ideal Free Distribution (IFD) model, how many fish will be in

patch A and Patch B? Explain your reasoning.