How does competition shape variation in metabolic rates?

A new study published in Evolution Letters investigates why metabolic rates are so variable between organisms. Here, lead author Dr Amanda Pettersen tell us what she found. Metabolic rate - the rate at which organisms take up, transform, and expend energy, is linked with the “pace-of-life”. Individuals with high metabolic rates often grow faster, reproduce … Continue reading How does competition shape variation in metabolic rates?

The architecture of adaptation: a master mutation or a mass of mutations?

A new study published in Evolution Letters demonstrates that rapid adaptation in natural populations of sticklebacks results from both genetic linkage (where multiple mutations located close together in the genome are inherited together) and pleiotropy (where the same mutation leads to changes in many traits). Lead author Dr Sophie Archambeault tells us more. When organisms … Continue reading The architecture of adaptation: a master mutation or a mass of mutations?