Life history traits are integrated biological characteristics of an organism that determine the timing and allocation of resources to growth, reproduction, and survival, and thus shape its life cycle. They include age and size at maturity, fecundity, reproductive schedule (e.g., semelparity vs. iteroparity), offspring size and number, growth rate, and lifespan. As a composite process outcome of development, physiology, and behavior under genetic and environmental control, life history traits are central to life history theory, which models how natural selection optimizes trade-offs among these traits to maximize fitness in specific ecological contexts.
Life-history variation is fundamental to the long-term persistence of populations and species because it ensures their ability to adapt to changing environments. Many important studies have focused on life-history variation ...
Plants & Animals
Oct 21, 2025
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Naked mole-rats are one of nature's most extraordinary creatures. These burrowing rodents can live for up to 37 years, around ten times longer than relatives of a similar size. But what is the secret to their extreme longevity? ...
Until Homo floresiensis was discovered, scientists assumed that the evolution of the human lineage was defined by bigger and bigger brains. Via a process called encephalization, human brains evolved to be relatively more ...
Evolution
Sep 24, 2025
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Periodical cicadas have one of the strangest life cycles in the animal kingdom. The 17-year cicadas spend 99.5% of their lives underground in an undeveloped nymph state, which is the longest strictly regulated juvenile period ...
Plants & Animals
Aug 27, 2025
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44
How do animals decide when to fight and when to walk, fly, slither, or swim away? Most research on animal conflict has focused on the short-term costs of single interactions, but a pair of behavioral ecologists argue that ...
Plants & Animals
Jul 16, 2025
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In a new study published and featured in the Annals of the Entomological Society of America, researchers have discovered that the developmental struggles of young parasitoid flies can have lasting effects that echo into adulthood.
Plants & Animals
Jul 11, 2025
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A study published in the Annals of the Entomological Society of America, offers the most detailed view to date of how this unusual fly develops and gives live birth—a rare phenomenon among flies.
Plants & Animals
Jul 11, 2025
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20
Despite having identical genetic instructions, female honey bee larvae can develop into either long-lived reproductive queens or short-lived sterile workers who help rear their sisters rather than lay their own eggs. Now, ...
Plants & Animals
Jun 20, 2025
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137
A team of biologists and wildlife specialists from the University of Notre Dame and Duke University, in the U.S., and Amboseli Baboon Research Project, in Kenya, has found evidence that female baboons who have relatively ...
