Demographic analysis reveals gradual senescence in the flatworm Macrostomum lignano

Table 1 Lifespan data of Macrostomum lignano in three replicate cohorts (1–3).

Replicate	N(censors)	Median lifespan (days)	90th percentile (days)	Maximum lifespan (days)
1	100 (0)	197	347	672
2	100 (25)	199	362	451
3	100 (9)	220	409	more than 745

All replicates initially started with 100 individuals (N). Individuals that died due to age-independent infection were censored. Median lifespan and 90^th percentile are the ages at which 50% and 90% mortality are reached respectively, while the maximum lifespan is the age at which the last survivor of the cohorts dies. At the day of submission the last 4% survivors of replicate 3 were 745 days old, and therefore the maximum lifespan of replicate 3 could not yet be determined.

ISSN: 1742-9994