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.
Researchers at Tokyo Metropolitan University have studied how fruit flies tune their development in response to environmental changes (diapause). Studying fruit fly strains from different latitudes across Japan, they showed ...
Ecology
Feb 16, 2026
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13
Some lobster mothers produce offspring that are far more likely to survive—in findings that could help safeguard lobster diversity. University of Exeter researchers, working in partnership with the National Lobster Hatchery ...
Ecology
Feb 13, 2026
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13
Most seals give birth to a pup around the same time each year, and wean them and send them on their way within 12 months in an annual cycle.
Plants & Animals
Feb 10, 2026
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23
Every ecosystem is shaped by billions of invisible battles: organisms competing for light, nutrients, space, or mates. These competitive interactions determine which species survive, how they evolve, and how vibrant and resilient ...
Evolution
Feb 3, 2026
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18
Once a seed germinates, it is committed to one location. Plants are sessile—stuck where they started out—forced to cope with whatever conditions arrive next. The only way out of trouble is to rebuild themselves in place.
Ecology
Jan 29, 2026
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21
A great white shark is a masterwork of evolutionary engineering. These beautiful predators glide effortlessly through the water, each slow, deliberate sweep of the powerful tail driving a body specialized for stealth, speed ...
Evolution
Jan 28, 2026
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140
Seals give birth only when conditions are right. After mating, a female seal can delay implantation of the embryo in the uterine wall—pausing pregnancy until she senses that her fat reserves are aligned with the season. This ...
Cell & Microbiology
Dec 22, 2025
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22
Has a crucial component to the development of human medicine been hiding under our feet? Auburn University Assistant Professor of Entomology Clint Penick and a team of graduate students may have found that ants are far ahead ...
Evolution
Dec 18, 2025
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324
Urbanization is rapidly growing worldwide, often bringing negative effects on wildlife through loss of habitat and disturbances such as light pollution and noise. Yet some species manage to adapt to cities, either due to ...
Plants & Animals
Dec 1, 2025
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17
Microorganisms in the Black Sea can produce large amounts of the potent greenhouse gas nitrous oxide (N2O). However, this gas never reaches the atmosphere because it is swiftly consumed by other microorganisms, which convert ...
Earth Sciences
Nov 4, 2025
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