PRELIM 1 2008 - PRELIM 1 2008 3. We would expect polygyny...

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PRELIM 1 2008 3. We would expect polygyny to occur when there is/are: a) Limited environmental resources b) Low density of nesting c) Low between- male genetic variance d)High food abundance e) High investment necessary for offspring success 4. One common characteristic of lekking species is that: a) Males are significantly smaller than females b) Males demonstrate little or no phenotypic variability c) Both sexes are elaborately ornamented d) Males have highly exaggerated traits e) Males are highly territorial 8. In bluegill sunfish populations, there are two types of males: territorial males and sneaker males. Territorial males are large, defend territories, and attract females. Sneaker males are small and look like females; they do not have territories, but instead “sneak” into a territorial male’s nest to fertilize the eggs that females lay there. When the ratio of sneaker males to territorial males is too high, there is intense competition between sneaker males to fertilize eggs in a territorial nest so the average reproductive success of any given sneaker is very low. When the ratio of sneaker males to territorial males is too low, there is very extreme competition between territorial males to attract females so the average fitness of any given territorial male is quite low. This situation is an example of: a) Positively frequency-dependent fitness b)
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This note was uploaded on 09/14/2010 for the course BIONB 2210 taught by Professor Seeley during the Fall '10 term at Cornell University (Engineering School).

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PRELIM 1 2008 - PRELIM 1 2008 3. We would expect polygyny...

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