Sex differences in longevity can provide insights into novel mechanisms of aging, yet they
have been little studied. Surprisingly, sex-specific longevity patterns are best known in wild …

The process of senescence (aging) is predominantly determined by the action of wild-type
genes. For most organisms, this does not reflect any adaptive function that senescence …

Two extant frameworks–the harshness-unpredictability model and the threat-deprivation
model–attempt to explain which dimensions of adversity have distinct influences on …

Between the 1930s and 50s, evolutionary biologists developed a successful theory of why
organisms age, firmly rooted in population genetic principles. By the 1980s the evolution of …

Life history theory seeks to explain the evolution of the major features of life cycles by
analyzing the ecological factors that shape age-specific schedules of growth, reproduction …

This book celebrates the guppy's unique contribution to evolutionary ecology. Ever since
Caryl Haskins described guppy populations as a'natural experiment'because of the way …

Senescence presents not only a medical problem, but also an evolutionary paradox
because it should be opposed by natural selection. Evolutionary hypotheses propose that …

1. Classic evolutionary models interpret ageing as a cost of reproduction, but evolutionary
research has thus far largely neglected the conceptual links between the evolution of ageing …

1. A major current challenge in ageing research is to understand why senescence rates vary
between individuals, populations and species in wild populations. 2. Recent studies clearly …

Methodological problems in describing patterns of senescence in wild populations have
until recently impeded progress in understanding the evolution of a process that decreases …