Lecture34 - Nov. 14, 2011 III. Research on Australian...

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BioNB 2210: Lecture 34 Nov. 14, 2011 Lecture 34: Hormones and Behavior 3 Sexual Signals and Strategies Professor Mike Webster Learning Objectives 1. Define the term “polyphenism” and describe the role of hormones, genes and environment in their development. 2. Design a field experiment to test for the role of hormones in the development of sexual signals. 3. Explain how the costs of hormones like testosterone might be important to the maintenance of honesty in sexual signals. I. Development of Sexual Signals (& Strategies) A. Variation in sexual signals – a role for hormones? B. Differences between the sexes (plumage color as an example) 1. Activational effects 2. Organizational (developmental) effects C. Variation across taxa II. Intrasexual Polyphenisms A. Examples B. Environmental effects on phenotype development: food, predators, and social environment C. Organizational versus activational effects
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BioNB 2210: Lecture 34
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Unformatted text preview: Nov. 14, 2011 III. Research on Australian Fairy-wrens A. Plumage signals and male polymorphism B. Effects of testosterone and condition on male plumage acquisition 1. Correlational evidence 2. Experimental evidence C. Bill color a secondary signal? 1. Correlational evidence 2. Experimental evidence Readings Required Reading: Searcy, W.A. and S. Nowicki (2008) Bird Song and the Problem of Honest Communication, in Exploring Animal Behavior (a.k.a., EAB ) by Sherman and Alcock. Winston, M. L. and K. N. Slessor (1992) The Essence of Royalty: Honey Bee Queen Pheromone, in Exploring Animal Behavior (a.k.a., EAB ) by Sherman and Alcock. Optional Reading (on fairy-wren research): Webster, M. S., J. Karubian and H. Schwabl. 2010. Dealing with uncertainty: Flexible reproductive strategies by a tropical passerine bird in an unstable environment. Advances in the Study of Behavior 42: 123-153....
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Lecture34 - Nov. 14, 2011 III. Research on Australian...

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