Strong sexual selection may lead small males or males in poor condition to adopt alternative
reproductive tactics (ARTs) as a way to avoid the risk of being completely excluded from the …

Individual differences in growth and size of vertebrates often represent adaptive, plastic
responses to contrasts in ecological conditions. Recent studies show that vertebrates can …

Alternative reproductive tactics (ARTs) coexisting within a population are found in many
organisms. Their existence has been an enduring puzzle in evolutionary biology. Why …

Life histories can be defined as the means by which individuals (or more precisely
genotypes) vary their age-or stage-specific expenditures of reproductive effort in response to …

Sexual size dimorphism (SSD) varies in animals from male biased to female biased. The
evolution of SSD is potentially influenced by a number of factors, such as territoriality …

The four species of horseshoe crabs share many similarities but differ in the intensity of
reproductive competition. Although all horseshoe crabs nest synchronously, only Limulus …

Understanding the contribution of neuropeptide-containing neurons to variation in social
behavior remains critically important. Galanin has gained increased attention because of the …

Finalist for the 2023 Pulitzer Prize in General Nonfiction and the 2023 PEN/EO Wilson
Literary Science Writing Award Winner of the Acoustical Society of America's 2023 Science …

Female mate choice is often based on male traits, including signals or behaviors, and/or the
quality of a male's territory. In species with obligate paternal care, where care directly affects …

Circulating glucocorticoids and androgens often figure prominently in mating tactic
expression in vertebrates. In anuran amphibians (frogs and toads), for example, recent …