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 77 for “"life history strategies"”.
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Evolution of life history strategies in Lophoziaceae
… field to analyse the patterns of variation in life history characters among members of the liverwort family Lophoziaceae. A combination of Principal Component and Cluster analyses was used to analyse data from literature in testing for recurrent suites of life history variation among species of …
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Evolution of life history strategies in Lophoziaceae
… field to analyse the patterns of variation in life history characters among members of the liverwort family Lophoziaceae. A combination of Principal Component and Cluster analyses was used to analyse data from literature in testing for recurrent suites of life history variation among species of …
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Exploring Life History Strategies in Adolescence; Attachment, Personality, and Bullying
… apply a component of Evolutionary Theory, termed Life History Strategy (LHS), to the study of bullying. The current study aimed to highlight the relationship between environmental pressures, slow and fast LHS, and bullying subtypes. A sample of 261 participants (125 males and 135 females) between …
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Alternative life history strategies in the West African reed frog, Hyperolius nitidulus
… the working hypothesis of two alternative life-cycle strategies favouring aestivation or immediate reproduction. The hypothesis for the life-cycles of Hyperolius nitidulus that differed from the commonly assumed reproductive strategy for this species was confirmed by the results of this …
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Life history strategies in variable environments: Demography, delayed germination and bet-hedging in a desert annual Plantago
… environment can affect population dynamics and life history strategies. Annual plants in desert environments are subject to large fluctuations in precipitation, both within and among years. I used a combination of field and laboratory studies to characterize variability in the populations …
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Population dynamics of Daphnia galeatat in the biomanipulated Bautzen Reservoir: life history strategies against food deficiency and predation
… to their influence on Daphnia dynamics and life history. Field data on fecundity and population structure of D. galeata were combined with results from life table and growth experiments performed under approximately in situ conditions to gain insight into the mechanisms leading to a …
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Ecological significance of variation in Themeda triandra Forsk : a case of intra-specific divergence in life history strategies?
… rangelands. The approach was to investigate life history characteristics of rangelands at four sites representing climate extremes. These differed in the amount, and predictability, of rainfall and the incidence of frost. The approach was novel in that a single species, Themeda triandra, was …
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An individual-based modelling approach to examine life history strategies of sardine Sardinops sagax in the southern Benguela ecosystem
… the west coast. A conceptual model of the early life history of sardine is proposed in light of limitations imposed by transport and retention of individuals. Lower primary production and the possibility of higher predation on the Agulhas Bank suggest that the south coast supports less …
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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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Life history strategies of three species of Cystophora (Phaeophyta, Fucales) from a shallow subtidal community in South Australia / by Sarah L. Hotchkiss.
A number of life history traits were quantified for three species of Cystophora. The composition and dynamics of the community were monitored and related to temporal changes in the patterns of growth and reproduction of each species, and also to patterns of recruitment and early community …
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Persistence mechanisms of Erodiophyllum elderi, an arid land daisy with a patchy distribution / Louise M. Emmerson.
… elderi are investigated in terms of life history strategies and patchy population theory.
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Flood pulse influences on exploited fish populations of the Central Amazon
… of river-floodplain fishes with different life history strategies in different ways. Catches of 21 taxa from approximately 18,000 fishing trips were modeled as a function of fishing effort, gear type, seasonal flood pulse variables, and interannual flood pulse variables. These models were …
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Environmental influences on moult and movement strategies in southern African waterfowl
Waterfowl annual life history events in north-temperate regions are driven primarily by predictable seasonal variations in temperature. In contrast, the spatio-temporal availability of adequate resources to waterfowl in the semi-arid regions of southern Africa is determined by rainfall which is …
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Reproductive physiology, avian malaria, and the cloacal microbiome in tropical Rufous-collared Sparrows (Zonotrichia capensis)
Life-history strategies are adaptations in behavior, physiology, and anatomy that influence survival and reproductive success. Variation in life-history strategies is often determined by adaptations to environmental conditions and trade-offs with sexually-selected signals. One of the aspects …
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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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Population ecology of landlocked Arctic charr, <i>Salvelinus alpinus L</i>., in the Canadian High Arctic
… The key hypothesis is that the alternative life history strategies represented by Dwarf and Normal charr represent different solutions to the problem of energy limitation within a size-structured population. Major findings of the models are that alternative life history strategies should be …
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Incubation behavior, embryonic heart rate, and developmental variation within and among altricial bird species
… that has multiple implications in subsequent life stages, therefore understanding the processes within the egg during the incubation period are important for a broader understanding of avian development and life history strategies. I examined embryonic heart rate (EHR) within 14 sympatrically …
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The ecology of sprouting in South African forests, savannas and fynbos
… has only recently received attention as a key life history strategy, especially in less disturbance prone environments. The aims of this thesis were to explore the ecological role of sprouting in selected South African biomes. In particular, to explore the biogeographic, community and …
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