Sexual Selection & Mating systems. Sexual selection overview Hypothesis Mechanisms Natural Selection v. Sexual Selection Males more affected Mating systems & sexual selection Scramble competition Mate Guarding Behavior Leks & Choruses Satellites & Interferers Sperm Competition.
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Male characters are "indicators" of "good genes",
some aspect of the sensory world biases
females to "prefer" or notice ascertain
(male defense, resource defense)
(female defense, resource defense, Lek, Scramble competition)
Explosive breeders = Female available for short periods, spatially aggregated
Thamnophis sirtalis parietalis – males swamp the few females that emerge…
High numbers of male garter snakes die soon after emerging from hibernation because they are attacked by crows. She-males at the center of a mating ball, however, are less exposed to predators – also remain warmer…