BACKGROUND Whereas early studies of animal evolution focused principally on the
adaptations of different species to their physical environment, more recent studies have …

Biologists have repeatedly rediscovered classical models from physics predicting collision
rates in an ideal gas. These models, and their two‐dimensional analogues, have been used …

In mammals with solitary females, the potential for males to monopolize matings is relatively
low, and scramble competition polygyny is presumed to be the predominant mating system …

In order to remain stable, dispersed social groups have to solve two fundamental problems:
the coordination of movement and cohesiveness within a group and the spacing between …

Socio-ecological models aim to predict the variation in social systems based on a limited
number of ecological parameters. Since the 1960s, the original model has taken two paths …

This study aims to elucidate the social system of the wild cavy (Cavia aperea), the feral
ancestor of the domestic guinea pig, whose behavior under natural conditions is almost …

Developing new cost-effective methods for monitoring the distribution and abundance of
species is essential for conservation biology. Passive acoustic monitoring (PAM) has long …

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

Rare in mammals but more common in primates, there remains a considerable controversy
concerning whether primate species traditionally described as monogamous actually …

Monogamy as a social system has been both a scientific puzzle and a sociocultural issue for
decades. In this review, we examine social monogamy from a comparative perspective with …