Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 38 for “"life-history theory"”.
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Poverty is behaviour: an evaluation of life history theory in Cape Town
This study used data from 2090 young adults and their households collected in a longitudinal survey in Cape Town from 2002 to 2009. The study examined factors influencing the educational achievement of the participants including environment, schools, parents and individual’s own behaviour. …
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Using Life-History Theory to Evaluate the Nighttime Parenting Strategies of First-Time Adolescent and Adult Mothers
… mature mothers. The second draws on evolutionary theory and suggests that nighttime parenting figures into the suite of behaviours that comprise parental investment, which varies depending on the life-history trajectories and reproductive strategies of individual mothers. The project addresses how …
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Geographic variation in size at age of the coral reef fish, Thalassoma lunare (family: Labridae) : a contribution to life history theory.
Key life history traits such as age at maturity, longevity and mortality have all shown correlations with body size. However, the relationship between age and size is particularly important as growth rates (size per time) can have a profound influence on reproductive capabilities and survival. This …
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An Ecosystem Model with Evolutionary Adaptive Trophic Structure
… view is that the interactions between life and the environment are bidirectional: the environment creates life and life creates the environment. However, most ecosystem models have an inbuilt rigidity such that the degrees to which they can mimic structural change in response to …
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Sociosexual Development: Infusing the Belsky, Steinberg, and Draper Model with Sexual Selection
Life history theory attempts to explain between- and within-species variation in maturational and reproductive patterns, whereas sexual selection attempts to explain between- and within-sex differences in intersexual mate choice and intrasexual competition for members of the opposite sex. These two …
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Immunocompetence, testosterone and breeding success in red bishop (Euplectes orix)
The life-history theory postulates that individuals need to allocate limited resources (i.e. energy expenditure, time, effort) to multiple conflicting life functions (i.e. growth, health maintenance, reproduction). Resources available to any given individual are always finite and any investment in …
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Life History Strategy And The Role Of Self-Regulation In Cheating Behavior
… and if the distal causal framework of life history theory could illuminate the relationships between self-regulation and cheating behavior. Participants in the experimental condition had their state self-regulation taxed (compared to the control condition); participants had an …
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Molecular phylogenetics and the evolutionary history of reproductive strategies in benthic shallow-water octopuses (Cephalopoda: Octopodinae)
… juvenile types is of fundamental interest to the life history theory of benthic marine invertebrates. One tenet of life history theory for these organisms predicts that the evolution and maintenance of dichotomous reproductive strategies is a fecundity-survival trade-off and environmental factors …
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Life history and reproductive ecology of selected proteaceae in the mountain Fynbos Vegetation of the South-Western Cape
… role of fire as a factor which has shaped the life-histories of plants in fire-prone Mediterranean shrublands. Fire regimes are not simply products of the abiotic elements of climate and ignition sources. The biotic component makes a significant contribution because community structure and …
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Examining the Interactive Effects of Time Perspective and Life History on Decision-making Patterns among College Students: A Modified Replication of Griskevicius et al. (2011b)
… decision-making patterns consistent with life history theory, called life history strategies, using an experimental design in which they randomly assigned college students to read one of two texts. The experimental condition was designed to trigger a feeling of heightened awareness of …
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Sexual immune dimorphism in ecological context : the impact of estrogen on human immune function and development of bacteria killing assay.
… of testosterone. These patterns align with life history theory, which suggests that reproductive investment and immune function are shaped by trade-offs between survival and reproduction. A systematic review and meta-analysis of studies on exogenous estrogen exposure reveal that estrogen …
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IMPORTANCE OF SLOW EMBRYONIC DEVELOPMENT IN OFFSPRING AND ADULT IMMUNE FUNCTION
… quality of offspring is a central question in life history theory. A physiological trade-off is thought to occur between the rate of development and enhancement of internal systems, such as immune function, which determine high offspring quality. For example, in birds, slow rate of embryonic …
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IMPORTANCE OF SLOW EMBRYONIC DEVELOPMENT IN OFFSPRING AND ADULT IMMUNE FUNCTION
… quality of offspring is a central question in life history theory. A physiological trade-off is thought to occur between the rate of development and enhancement of internal systems, such as immune function, which determine high offspring quality. For example, in birds, slow rate of embryonic …
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Life history, growth and dental development in young primates: a study using captive rhesus macaques
… to paternity. There is evidence to suggest that life history events and social stress may be reflected in microscopic dental development in young rhesus monkeys. This work has outlined how important the mother and the environment are in studies of growth and maternal investment in non-human …
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An evaluation of geographic variation in the life history and behaviour of anemonefishes: A common-garden approach
The parameters of a species life history and performance do not vary independently. Co-varying traits provide the basis for hypotheses as to how individuals allocate energy, as populations genetically adapt to or phenotypically adjust to different environments. In coral reef fishes, the extent and …
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Maternal Effort, Food Quality, and Cortisol Variation During Lactation in Propithecus coquereli in Northwestern Madagascar
… mothers provide is paramount to investigating life history theory. Maternal care is the principal determinant of infant survival and future reproductive success. Lactation is the most energetically expensive activity for mammals, in turn causing lactating females to compensate for drastically …
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Influence of environmental variation on habitat selection, life history strategies and population dynamics of sympatric ptarmigan in the southern Yukon Territory
… variation is an important driver of avian life history and population dynamics. Climate change models predict increased variability for many regions and to predict the effects on species, we need to examine how their life history characteristics influence their response to climate. I …
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Young adults' sexual strategies and mating displays in the virtual world: an evolutionary perspective
Life History Theory (LHT) predicts that natural selection favours a degree of developmental plasticity when it comes to sexual strategies and mating displays. Individuals should develop a faster life history strategy (showing, for example, higher mating effort and a preference for a variety of …
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The role of incubation temperature in determining avian phenotype: implications for avian ecology, life history evolution, and conservation
… has a profound influence on an individual's life history trajectory and parents have tremendous influence over this environment. Despite the wealth of research demonstrating that incubation temperature affects a suite of traits important to fitness in reptiles, we are only now discovering …
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