The impact of the ongoing rapid climate change on natural systems is a major issue for
human societies. An important challenge for ecologists is to identify the climatic factors that …

Living in social groups could influence the evolution of senescence and longevity by
affecting key life‐history parameters such as extrinsic mortality and the cost of reproduction …

Explaining variation in life expectancy between individuals of the same age is fundamental
to our understanding of population ecology and life history evolution. Variation in the length …

Background The vertebrate gut microbiome (GM) can vary substantially across individuals
within the same natural population. Although there is evidence linking the GM to health in …

Understanding individual‐level variation in response to the environment is fundamental to
understanding life‐history evolution and population dynamics. Telomeres, the protective …

Helping by group members is predicted to lead to delayed senescence by affecting the trade-
off between current reproduction and future survival for dominant breeders. Here we …

Females should prefer to be fertilized by males that increase the genetic quality of their
offspring. In vertebrates, genes of the major histocompatibility complex (MHC) play a key …

In humans, gut microbiome (GM) differences are often correlated with, and sometimes
causally implicated in, ageing. However, it is unclear how these findings translate in wild …

Summary 1 Correlational studies of reproductive success are plagued by difficulty over the
direction of causation. For example, improved reproductive success with age can result from …

Individual variation in telomere length is predictive of health and mortality risk across a
range of species. However, the relative influence of environmental and genetic variation on …