Table 1.

Parameters and variables

Parameter	Explanation; default value
plug	Probability that a copulation does not involve any sperm transfer, given the used genital opening has been used before; 0.8
	Maturation rate of males and females, respectively; 0.5, 1
	Mortality rate of males and females, respectively; 0.02, 0.02
Δ	Time for which a male can extend a copulation beyond the female's attack by not attempting to escape; 10
R	Sex ratio, males/females; 1
S	Web-sites available per female; 1
αvirgin, αmated	Coefficients scaling the rates at which males are attracted by virgin or mated females, respectively; 5, 1
	Proportion of all female that are large; 0.5
fecunditysmall	Factor by which a large female produces more eggs than a small female; 0.5
tmax	Number of time steps of a mating season; 10
Variable	Explanation
c	Attempted copulation duration
x	Units of transferred sperm
	Frequencies of males in state i and females in state j, respectively, expressed in relation to the initial number of subadult females,
t	The current time step, where tmax marks the end of the breeding season
used	State of a particular genital opening (used = 1 and used = 0 for used or unused openings, respectively)