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.
Male characters are "indicators" of "good genes",
some aspect of the sensory world biases
females to "prefer" or notice ascertain
B. POSSIBLE MECHANISMS: traits?
(male defense, resource defense)
(female defense, resource defense, Lek, Scramble competition)
Explosive breeders = Female available for short periods, spatially aggregated
Rana sylvatica traits?
Thamnophis sirtalis parietalis lizards & snakes – 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…
Chiromantis xeramplina lizards & snakes – African gray treefrogF. Sperm Competition