Sexual Selection is defined as differential reproduction as a result of differential mating (Thank you Dr. Carey for drilling that definition into my head :) . The classic example used to demonstrate sexual selection is peacock males. Peacock males who have very ornate and beautiful tail feathers usually reproduce more because females are attracted to males with these types of feathers. Males who do not have these kind of tale feathers do not get to reproduce thus a form of selection. To be more specific this type of selection is Intersexual or epigamic selection (Again thank you Dr. Carey).
Well here is my Annotated Citations hope you like them
Jacobs LF, Gaulin SJC, Sherry DF,
and Hoffman GE Evolution of Spatial
Cognition: Sex-Specific Patterns of Spatial Behavior Predict Hippocampal Size Proceedings of
the National Academy of
Sciences of the United States of America Aug 1990; 87: 6349 - 6352. Click Here
To view the full article pls click Here
Airey DC, Buchanan KL, Szekely T,Catchpole CK, and
DeVoogd TJ. Song, sexual selection, and a song control nucleus (HVc) in the
brains of European sedge warblers. Journal
of Neurobiology Volume 44, Issue 1, Pages 1 – 6 Click Here