Fig. 1

Survivorship and age-specific mortality in adult male and female K. flavescens. Median (50% alive) and maximum (5% alive) lifespan is greater in adult female (black dashed lines) yellow mud turtles than in adult males (grey solid lines). Y-axis is survivorship Lx for adults, starting at age 11. Lines dropping to the x-axis show the sex-specific median and maximum lifespans in chronological age. The inset shows the Gompertz models of accelerating mortality across adulthood; the initial adult mortality for males is significantly higher than for females (elevation of lines), with equivalent increases (slopes of lines) (Table 1). Y-axis is natural logarithm of age-specific mortality from the fitted Gompertz acceleration model