Search for dissertations about: "life-history theory"

Showing result 1 - 5 of 28 swedish dissertations containing the words life-history theory.

  2. 1. Sexual selection in the collared flycatcher (Ficedula albicollis) : A life-history perspective

    Author : Anna Qvarnström; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ecology; Sexual selection; life-history; honest signalling; fighting ability; genotype-environment interaction; direct benefits; indirect benefits; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi; Animal Ecology; zooekologi;

    Abstract : This thesis integrates sexual selection theory with life history theory to elucidate the causes and consequences of variation in a male secondary sexual trait. The model organism, the collared flycatcher (Ficedula albicollis), was studied on Gotland, Sweden. READ MORE

  4. 2. Causes and consequences of life-history variation : The effects of parasites, glucocorticoids, and environmental conditions in the collared flycatcher (Ficedula albicollis)

    Author : Kevin Fletcher; Lars Gustafsson; Anders Pape Moller; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Collard flycatcher; Haemosporidian blood parasite; glucocorticoid; life history;

    Abstract : Life-history is the study of all the different stages of life that affect reproductive success and survival between the birth and death of an organism. The reproductive output of an organism is constrained by many things including time, resource, disease agents and environmental conditions. READ MORE

  5. 3. Experimental Evolution of Life-history : Testing the Evolutionary Theories of Ageing

    Author : Hwei-yen Chen; Alexei Maklakov; Tracey Chapman; Uppsala universitet; []
    Keywords : senescence; ageing; longevity; mortality; experimental evolution; Caenorhabditis remanei; Biologi; Biology;

    Abstract : Ageing reduces fitness, but how ageing evolves is still unclear. Evolutionary theory of ageing hinges on the fundamental principal that the force of natural selection declines with age. READ MORE

  6. 4. Thermal adaptation along a latitudinal gradient in damselflies

    Author : Viktor Nilsson-Örtman; Frank Johansson; Karl Gotthard; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Growth rate; metabolic theory of ecology; universal temperature dependence; environmental gradients; thermal performance; thermal sensitivity; environmental variability; optimality theory; life history; acclimation; size structure; competition; cannibalism; intraguild predation;

    Abstract : Understanding how temperature affects biological systems is a central question in ecology and evolutionary biology. Anthropogenic climate change adds urgency to this topic, as the demise or success of species under climate change is expected to depend on how temperature affects important aspects of organismal performance, such as growth, development, survival and reproduction. READ MORE

  7. 5. Adaptive body regulation in the life history of birds

    Author : Johan Lind; Theunis Piersma; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ethology and behavioural ecology; Etologi och beteendeekologi; etologi; Ethology;

    Abstract : Birds have been flying on this Earth for around 150 million years and in response to fluctuating environments birds have evolved flexible body regulation. This thesis has investigated costs and adaptations in bird body regulation in different life history stages, namely moult and migration. READ MORE