BIOL 206 Lecture Notes - Lecture 23: Signalling Theory, Mate Choice, Nuptial Gift
11 Apr 2017
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Lecture 23 - mate choice: intersexual selection, direct benefits, indirect benefits, sensory bias, sex-role reversal. 1] intersexual selection involves nonrandom mate choice intrasexual selection intersexual selection (mate choice: focus if this lecture. Why would mate choice evolve: increase the quantity and quality of his offspring, it doesn"t evolve through sexual selection, it evolves to. When does mate choice exert sexual selection: when mate choice does evolve, it can exert sexual selection on the other gender. 2] mate choice often yields direct benefit to the chooser. Evidence of direct benefits house finch [case study] Males vary in colour (due to diet and genetic variation, carotenoids genes + diet experimental manipulation possible. Bright males tend to feed the offspring more than the dull male. Brightness score of the father and sons has a positive relationship (bright males get bright sons: indirect benefits, increase fitness of the offspring.
