In species with separate sexes, females and males often differ in their morphology,
physiology and behaviour. Such sex‐specific traits are functionally linked to variation in …

Adult sex ratio (ASR) exhibits immense variation in nature, although neither the causes nor
the implications of this variation are fully understood. According to theory, the ASR is …

The past half century has seen the development of the field of post-ejaculatory sexual
selection, the sequel to sexual selection for mate-acquisition (pre-ejaculatory) described by …

Why do some animals mate with one partner rather than many? Here, I investigate factors
related to (i) spatial constraints (habitat limitation, mate availability),(ii) time constraints …

Adult sex ratio (ASR) is a fundamental concept in population demography, and recent theory
suggests that ASR plays a central role in social behavior, mating systems, and parental care …

Abstract “Monogamy” and pair bonding have long been of interest to anthropologists and
primatologists. Their study contributes to our knowledge of human evolutionary biology and …

The evolution of monogamy and paternal care in humans is often argued to have resulted
from the needs of our expensive offspring. Recent research challenges this claim, however …

It is increasingly recognized that the relative proportion of potential mates to competitors in a
population impacts a range of sex-specific behaviours and in particular mating and …

Behavioral ecologists, evolutionary biologists, and anthropologists have been long
fascinated by the existence of “monogamy” in the animal kingdom. Multiple studies have …

Theoretical models and empirical studies in various taxa have identified important links
between variation in sex roles and the number of adult males and females (adult sex ratio …