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. Author manuscript; available in PMC: 2008 Jun 30.
Published in final edited form as: J Gerontol A Biol Sci Med Sci. 2005 Aug;60(8):953–962. doi: 10.1093/gerona/60.8.953

Figure 1.

Figure 1

Individual fecundity in a Drosophila female (fly 193). The daily scores are shown by a thin line and the regular pattern by a thick line. The maturation stage is denoted by x < Xonset, maturity by Xonset ≤ x < Xsen, and senescence by Xsen ≤ x. The onset of senescence Xsen = Xonset + T. The senescence stage is described by F = RC·exp[−αsen·(x − Xsen)] and lasts S = (LS−T−Xonset) days. In the figure, Xonset=2, T=9.7, S=23.3, LS=35 (days), αsen· = 0.1014 (day−1), and RC = 70.6 (eggs per day). See the main text for further details.