Sex-specific morphs exhibit discrete phenotypes, often including many disparate traits, that
are observed in only one sex. These morphs have evolved independently in many different …

This paper reviews the life history of brown trout and factors influencing decisions to migrate.
Decisions that maximize fitness appear dependent on size at age. In partly anadromous …

The principles of game theory apply to a wide range of topics in biology. This book presents
the central concepts in evolutionary game theory and provides an authoritative and up-to …

Synopsis “Sex” is often used to describe a suite of phenotypic and genotypic traits of an
organism related to reproduction. However, these traits—gamete type, chromosomal …

Males that exhibit alternative reproductive tactics (ARTs) often differ in the risk of sperm
competition and the energetic trade-offs they experience. The resulting patterns of selection …

Developmental plasticity is a widespread property of living organisms, but different
individuals in the same species can vary greatly in how susceptible they are to …

Repeatability represents a key parameter in ecological and evolutionary research.
Repeatability is underpinned by developmental plasticity and genetic variation but may …

The discontinuous variation in male mating behaviour is termed alternative mating tactics. A
distinction is commonly made between alternative mating tactics that are fixed for life or …

Forms of phenotypic plasticity in key traits, and forms of selection on and genetic variation in
such plasticity, fundamentally underpin phenotypic, population dynamic, and evolutionary …

In many slowly developing mammal species, males reach sexual maturity well before they
develop secondary sexual characteristics. Sexually mature male orangutans have …