Should females prefer old males?

A new study published in Evolution Letters investigates whether the benefits of mating with an older, more experienced male outweigh the costs that paternal senescence may confer to the offspring. One of the study’s authors, Carolina Segami, tells us more.  Click here for a Spanish translation of this blogpost Choosing a mate is a critical … Continue reading Should females prefer old males?

Population spatial structure moderates sexual conflict

A new study published in Evolution Letters uses an experimental evolution approach to provide important new insights into how sexual interactions are modulated. Author Dr Francisco Garcia-Gonzalez tells us more. During the times of Justinian the Great, around the year 550 A.D., the legend says that a ruler in a vast region of what was known … Continue reading Population spatial structure moderates sexual conflict

Testosterone relaxes genetic constraints between the sexes

A new study published in Evolution Letters has shown that testosterone shapes the underlying genetic parameters determining how populations respond to selection. Authors Tyler Wittman and Robert Cox tell us more. In many species, females and males look strikingly different. This phenomenon of sexual dimorphism is quite common, but it is puzzling when you consider … Continue reading Testosterone relaxes genetic constraints between the sexes

Larger cells have relatively smaller nuclei across the Tree of Life

A new study published in Evolution Letters finally puts paid to a long-held belief that the ratio between nucleus size and cell size is approximately constant. Although recently it has been recognised that nucleus size and cell size are not inexorably bound, the idea of a constant nucleus to cell size (NS:CS) ratio – the … Continue reading Larger cells have relatively smaller nuclei across the Tree of Life

Can we pin the fluffy tails of our pet dogs on neural crest cells?

Domesticated animals share similar features, such as floppy ears, curly tails, and smaller brains. A new study published in Evolution Letters challenges the most popular explanation for how these features arose. Lead author Dr Laura Wilson tells us more. Charles Darwin was first to notice that different domestic animals share similar characteristics despite not being … Continue reading Can we pin the fluffy tails of our pet dogs on neural crest cells?

The price of reproduction – from the male perspective

A new study published in Evolution Letters demonstrates that males incur greater costs from investing in pre-copulatory reproductive traits, like courtship behaviour, than in post-copulatory traits, like sperm production. Lead author Meng-Han Chung tells us more. “Why do animals age?” is a long-standing question in life-history, and theories suggest that it is about energy allocation. … Continue reading The price of reproduction – from the male perspective

Competition drives flower colour evolution in a biodiversity hotspot

The findings of a new study published in Evolution Letters help explain the coexistence of many closely related flowering plant species, in one of the most diverse temperate ecosystems in the world. Lead author Dr Alex Skeels tells us more. Flowers are some of the most beautiful and fascinating structures in nature and most people … Continue reading Competition drives flower colour evolution in a biodiversity hotspot