LS15 Problem Set 4 - Question 1The presence of cuckold...

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Question 1- The presence of cuckold males greatly reduced egg guarding and did not alter the offspring guarding. There was a difference because when they were eggs, the parent was unsure if they were their offspring or not, but once they hatched they were able to tell that they were their offspring and therefore protected them how they normally would. Question 2- You can draw the conclusion that there is strong evidence to suggest that paternity of offspring affects the parental care given by a male bluegill fish. This is because the presence of the cuckold male and the possibility of him being the parent to the eggs, reduced the male bluegill’s parental investment before they hatched. Question 3- The dominant male breeds alone he can expect to have 2.3 offspring. If the dominant male breeds in a trio he will sire half the breed, or 1.6 offspring on average. The second male’s offspring are included in the dominant male’s inclusive fitness weighted by the coefficient of relatedness, r.

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