Different loci within the genome of a single species can potentially coevolve in a manner that
is analogous to the Red Queen process among species. The major factor driving this …

A century ago, foundational work by Thorleif Schjelderup-Ebbe described a 'pecking order'in
chicken societies, where individuals could be ordered according to their ability to exert their …

Sexual and asexual reproduction are found throughout the plant and animal kingdoms.
Asexual reproduction has its advantages, chief among which is that it does not require the …

A new theory integrating evolutionary and dynamical approaches is proposed. Following
evolutionary models, psychological mechanisms are conceived as conditional decision …

Scientists and conservationists are beginning to understand the importance of top
carnivores to the health and integrity of fully functioning ecosystems. As burgeoning human …

I examined influence of body size and mating systems on sexual-size dimorphism by
summarizing characteristics and testing for associations among the most dimorphic …

Sexual segregation in foraging is predicted from the great size disparity of male and female
northern elephant seals, Mirounga angustirostris. Our aim was to test this prediction by …

Competition for fertile females determines male reproductive success in many species. The
priority of access model predicts that male dominance rank determines access to females …

Male contests for access to receptive females are thought to have selected for the larger
male body size and conspicuous weaponry frequently observed in mammalian species …

Sexual size dimorphism may evolve as a result of both natural and sexual selection. In
polygynous mammals, the main factor resulting in the evolution of large body size in males …