Discrete asymmetric scramble
Mates encounter and must decide
whether or not to mate
Offspring viability decreases
with level of hybrid incompatibility
ESS decision thresholds vary with
the ratio of investment in male to
female gametes, gm/gf
Females become more choosy as
their investment relative to a male
increases and the sex ratio is male-biased
Whether mating and fertilization occurs in the conflict area depends on a maleís ability to force
matings and femaleís ability to control fertilization after mating.
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