Knowledge Tree
life history stages
Also known as: life-history stage, life cycle stages
Facts (21)
Sources
Allostasis revisited: A perception, variation, and risk framework frontiersin.org Sep 28, 2022 18 facts
claimIndividuals can prepare for energetically demanding life history stages by using predictive cues to anticipate their onset rather than responding facultatively.
claimPredictable environmental changes allow an individual to prepare by using predictive cues to anticipate the onset of a life history stage rather than responding facultatively.
claimRoutine metabolic rate (Ei), defined as daily routines above basal existence energy, increases due to competition, predation, low food, or distribution availability, leading to decreased reproductive output, shorter lifespan, reduced overlap of life history stages, or innovation in antipredator behavior.
claimResponsiveness to cues varies based on season, life history stage, geographic location, and social structure.
claimThe Emergency Life-History Stage (ELHS) is a conserved suite of physiological and behavioral responses driven by glucocorticoid action, characterized by the cessation of normal life-history stages and reproductive inhibition.
claimThe cost of surrendering a physical location includes losing fitness-related investments from the normal life-history stage and increasing the risk of damage from Type II/allostatic overload.
claimElevated general responsiveness is expected in animals when fitness investments related to life-history stages are low, provided this is coupled with habituation or behavioral responses that minimize over-stimulation by common cues.
claimThe cost of activating the Emergency Life History Stage (ELHS) includes surrendering fitness-related investments associated with a normal life-history stage and potentially increasing the risk of damage associated with Type II/allostatic overload.
claimThe responsiveness of an organism to environmental cues varies over time and across populations due to factors such as season, life history stage, geographic location, and social structure.
claimOrganisms use predictable environmental cues, such as day length, light intensity, temperature, and food availability, to time life history stages and homeostatic adjustments.
referenceGwinner (1996), Wingfield (2004), and Hau et al. (2008) are cited as sources regarding the use of environmental cues for timing life history stages and homeostatic adjustments.
claimThe emergency life history stage (ELHS) is triggered when perturbation resistance potential is reduced near the zero point due to environmental perturbations, extreme weather, perceived predation risk, or fear, allowing coping mechanisms while suppressing normal life history stages.
claimThe slope of the lines for circulating corticosteroids varies among different life-history stages.
claimElevated general responsiveness to stressors is expected when fitness investments in life-history stages are low, provided this is coupled with habituation or behavioral responses that minimize over-stimulation by common cues.
claimRoutine costs (Ei) in the allostatic load framework vary seasonally based on life-history stages such as breeding, migration, and molting.
claimThe emergency life-history stage (ELHS) is a physiological state triggered by allostatic overload that redirects physiology and behavior toward individual survival, often interrupting normal life history stages.
claimRoutine glucocorticoid fluctuations, such as those occurring with time of day, season, or life-history stage, are distinct from the abnormally high levels associated with allostatic overload (Eo).
formulaIn the model of allostatic load, perturbation resistance potential (PRP) is quantified as the difference between available resources and all energetic costs of allostatic load, including daily routines, life history stages (such as breeding, migration, and molt), and the impact of environmental perturbations.
Homeostasis and Health: From Balance to Change | Biological Theory link.springer.com Oct 14, 2025 3 facts
claimLiving organisms are not inherently stable but must modify their internal dynamics to remain viable under variable internal and external conditions, such as time of day, season, and life cycle stage.
claimRegulatory mechanisms in organisms operate based on the specific features of the environment they sense, but they do not only respond conservatively by counteracting perturbations; they also adapt to settings such as day and night cycles, seasons, and life cycle stages.
claimEnvironmental factors such as day and night cycles, seasons, and life cycle stages are considered settings for organism operation rather than perturbations.