Definitions for "Minimum viable population"
The size of a population which, with a given probability, will ensure the persistence of the population for a specified period of time.
The minimum number of individuals of a species in a given locality that could be expected to survive in the long-term.
The smallest isolated population having a good chance of surviving for a given number of years despite the foreseeable effects of demographic, environmental, and genetic events and natural catastrophes. (The probability of persistence and the time of persistence are often taken to be 99 percent and 1000 years, respectively.)