Fig. 1.

Exemplary patterns of survival. F Alternative Gompertz survival model: Points relative number of Mediterranean fruit flies still alive after Day 0 (Carey et al. 1992). Line F; Eq. 5b fit to data F (death rate, Eq. 4b, decreases exponentially). Parameters: b = 10.532, k = 0.139, . H Standard Gompertz survival model: Points relative number of persons alive at each age after Year 0 (Statistical Abstracts of Sweden 1991). Line H; Eq. 3 fit to data H (mortality rate, Eq. 2b, increases exponentially). Parameters: b = 0.00007, k = 0.11, n_o = 98