Digest: Finding new homes: Multilevel selection on birth timing and growth in North American red squirrels

摘要

The theory of multilevel selection posits that the fitness value of a trait is determined not only by its expression at the individual level, but also by its average expression among spatially clustered groups. Multilevel selection has attracted interest as a potential mechanism for the evolution of cooperation and increased sociality (Traulsen and Nowak 2006).