Human populations reproduce at the rate of roughly three generations per century, but new insect generations arise in a matter of days or weeks.
There are roughly four generations of students.
After a period of only 3 years (roughly six generations), an evolutionary response was apparent.
We assessed impacts of the programs on neutral genetic diversity in this metapopulation using 16 microsatellite loci and a thirty-year dataset spanning before and after supplementation, roughly eight generations.
Every transfer corresponded to roughly two viral generations and effective population size was thus approximated as two times the number of viral plaques transferred.
In this way, we aim to determine how a country's historical level of freedom since 1972, over roughly two human generations, influences its present day health status.
The second timescale is the 'personal timescale', which allows for planning and actions that occur over the time course of roughly two human generations (defined here as 44 years).
In other words, a fair system won't be in place for roughly four more generations of women.
However, based on capture rates and reproduction observations, the population recovery occurred quickly, after approximately 7 years, or roughly three bobcat generations (Knick et al. 1985), since the beginning of the mange epizootic (S. P. D. Riley NPS, unpublished data).
