On the relationship between population differentiation and sampling effort: is more always better?
Article first published online: 4 JUN 2009
© 2009 The Authors
Volume 118, Issue 8, pages 1127–1129, August 2009
How to Cite
Björklund, M. and Bergek, S. (2009), On the relationship between population differentiation and sampling effort: is more always better?. Oikos, 118: 1127–1129. doi: 10.1111/j.1600-0706.2009.17555.x
- Issue published online: 29 JUL 2009
- Article first published online: 4 JUN 2009
- Manuscript Accepted 30 March 2009
Given the relative ease by which genotypic data now can be obtained, studies of population differentiation can attain high statistical power provided the number of individuals and loci scored are sufficiently high. This has led to a misunderstanding of the concept of power, and studies with a low number of individuals and loci are dismissed despite highly significant results. This raises statistical, biological and ethical concerns, which we discuss in this note. We suggest that authors should routinely report the number of additional non-significant loci as a measure of the robustness of the results.