How large must populations be to retain evolutionary potential?
Article first published online: 28 FEB 2006
Volume 1, Issue 1, pages 69–70, February 1998
How to Cite
Franklin, I. R. and Frankham, R. (1998), How large must populations be to retain evolutionary potential?. Animal Conservation, 1: 69–70. doi: 10.1111/j.1469-1795.1998.tb00228.x
- Issue published online: 28 FEB 2006
- Article first published online: 28 FEB 2006
- (Received 20 June 1997; accepted 3 December 1997)
Maintaining genetic variation for future evolutionary change is an important issue for conservation biology. However, there is controversy over the effective population size (Ne) required for endangered species to retain their evolutionary potential, with proposed sizes ranging from 500 to 5000. The highest estimate is based on the assumption that 90% of mutations are deleterious. We review the arguments for an effective size of 5000 and conclude that it assumes effective mutation rates that are too low, and heritabilities that are, in general, very high. We conclude that an Ne of 500–1000 is appropriate at this time.