Evolution, Conservation, and Genomics
Investigating the molecular processes underlying adaptation
Life history is the nexus of biology, because various biological questions ultimately revolve around the causes and consequences of variation in reproduction and survival, i.e. fitness. Traditionally, a major tool in life-history research has been quantitative genetics because it provides an important statistical link between phenotype and genotype. However, the mechanisms by which evolution occurs may remain unclear unless such traditional approaches are combined with molecular investigations. Another complicating factor is that the fitness of male vs female life histories do not always align, and hence life history traits may be shaped by sexual conflict. This is why life-history approaches focusing on both quantifying the conflict and understanding its resolution at the genetic level are needed.
Craig Primmer – The mysteries of salmon puberty
The salmon of the Baltic reach maturity younger and younger. Because of this they return to their home rivers smaller than before. The reason is...