Fig. 2

Outcomes of mating and remating trials in terms of time spent courting and the propensity of females to “trade-up” to larger males or males with greater size-corrected mass. (a,b) Time-to-event curves showing the latency from the first mount to the first copulation in mating trials (a) and remating trials (b) with adult (brown solid lines) and subadult (orange dotted lines) females. Curves extend to 720 min (total duration of trials) because copulation did not occur in some trials. Significant differences are indicated by different letters (female stage) or an asterisk (male size-corrected mass). Male size-corrected mass is illustrated here as a binary variable for ease of interpretation. A value > 0 indicates a mass greater than average for a given body size (heavy lines); a value of < 0 indicates mass less than average for a given body size (thin lines). (c,d) The relationship between the body size (c) or size-corrected mass (d) of the second-mating male relative to the first and the probability a female remates. Points (c,d) represent raw data, lines are predicted fits and grey areas are approximate 95% CIs from GLMs where male size-corrected mass or size difference is set at its mean for prediction