Sex on Islands

This topic submitted by Brian Lin ( linl2@miamioh.edu) at 3:53 PM on 3/30/06.

Students take a "coral quiz", San Salvador, Bahamas.

Tropical Field Courses -Western Program-Miami University


Or rather, the Origins of Sexual Dimorphism and Evolutionary Paradox on Sexual Competition

This fits well with island ecology, as evolutionary patterns can be best seen and exemplified in marine ecosystems and migration from island to island (Founder Effect). There are also seemingly contradictatory observations in such cases that seem to be exceptions (or are they?) to the rules governing evolution.

Intro: Evolution defined
-Mendelian Genetics (brief)
-Lamarck
-controversy

Island Geography
-Sandy beaches
-Sea Grass
-Mangroves
-Coral

Sexual Dimorphism in Marine Species
-Asexual vs. Sexual Reproduction (brief)
-Parental Investment
-Male vs. Male (intrasexual)
-Selection of traits that may/may not increase fitness
-Male vs. Female (intersexual)
-Selection of traits that may/may not increase
-Female Choice.
-Why not optimal traits chosen?

Paradox
-Sexual Ratios
-Reproduction Rates vs. Mortality Rates
-Red Queen Hypothesis
-"Now, here, you see, it takes all the running you can do to keep in the same place."
-Evolutionary "Cold War"

Conclusion:
-Adaptation, not perfection.
-Sexual competition paradox
-Red Queen paradox
-Traits increase LRS: trade-off

For Further Info on this Topic, Check out this WWW Site: http://www.ruthannzaroff.com/wonderland/.
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