Biology
4th Edition
ISBN: 9781259188121
Author: Peter Stiling, Robert Brooker, Linda Graham, Eric Widmaier
Publisher: McGraw-Hill Education
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Chapter 24.3, Problem 1CC
Summary Introduction
To determine: Whether the trait of having loud and elaborate courtship in male birds is involved in intersexual or intrasexual selection.
Introduction: In an intrasexual selection, males directly compete with each other to mate with of the opposite sex. In intersexual selection, members of one sex, usually the females choose their mates on the basis of certain types of desirable characteristics.
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Question- Bluegill sunfish males use one of three strategies in trying to gain access to females and mate. Each male only carries out only one of the three strategies: territorial male, sneaker male or female mimic. While the territorial males have the highest reproductive success relative to the other males, some males are not large enough to successfully compete with other territorial males and adopt an alternative strategy, where they gain at least some reproductive success. This is an example of
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This is a picture of a brightly colored female:
O Females incubate eggs and care for the young.
Males incubate eggs and care for the young
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Intrasexual selection involves competition among one sex (typically males) for mating access to the other sex. Intersexual selection involves mate choice in which individuals from one sex (typically females) choose their mates from among individuals of the other sex. Imagine a group of males that is engaged in agonistic behavior, from which Male A emerges triumphant. Now imagine a female that is assessing all of the males that were involved in the fights, and chooses Male A. Explain why this situation shows how intrasexual and intersexual selection pressures are likely both at play in the trait selection.
Chapter 24 Solutions
Biology
Ch. 24.1 - Prob. 1CCCh. 24.2 - Prob. 1CCCh. 24.2 - Prob. 2CCCh. 24.2 - Prob. 3CCCh. 24.3 - Prob. 1CCCh. 24.3 - Prob. 1EQCh. 24.3 - Prob. 2EQCh. 24.3 - Prob. 3EQCh. 24.4 - Genetic Drift Concept Check: How does the...Ch. 24.4 - Prob. 1BC
Ch. 24.5 - Prob. 1CCCh. 24.5 - Prob. 1BCCh. 24 - Population geneticists are interested in the...Ch. 24 - The Hardy-Weinberg equation characterizes the...Ch. 24 - Prob. 3TYCh. 24 - Prob. 4TYCh. 24 - Prob. 5TYCh. 24 - Prob. 6TYCh. 24 - Prob. 7TYCh. 24 - Prob. 8TYCh. 24 - Kimuras proposal regarding neutral variation...Ch. 24 - Populations that experience inbreeding may also...Ch. 24 - Prob. 1CQCh. 24 - Prob. 2CQCh. 24 - Prob. 3CQCh. 24 - Antibiotics are commonly used to combat bacterial...Ch. 24 - Discuss die similarities and differences among...
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