Search for dissertations about: "reproductive costs"

Showing result 1 - 5 of 63 swedish dissertations containing the words reproductive costs.

  2. 1. Costs and Tactics in the Evolution of Reproductive Effort

    Author : Ingemar Jönsson; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; capital breeding; Falco tinnunculus; body mass; DEE; reproductive effort; reproductive costs; income breeding; Animal ecology; Djurekologi;

    Abstract : This study focuses on various aspects of costs of reproduction and the evolution of energetic breeding tactics. It emphasizes the distinction between demographic costs of reproduction expressed already before current offspring have reached independence (prebreeding costs), and costs expressed only after offspring independence (postbreeding costs). READ MORE

  4. 2. Costs, benefits and constraints in the evolution of avian reproductive tactics: a study on the blue tit

    Author : Erik Svensson; Evolutionär ekologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; reproductive timing; selection analysis; natural selection; mate quality; nestlings; sex ratio; DNA-content; flow cytometry; ELISA; BMR; energetics; immunocompetence; immune system; sexual conflict; nestling mortality; thermoregulation; moult; reproductive costs; reproductive effort; Parus caeruleus; blue tit; birds; juvenile survival; laying date; food supply; Animal ecology; Djurekologi;

    Abstract : In this study I have investigated the various factors influencing reproductive tactics among breeding blue tits (Parus caeruleus). The study was carried out in a nestbox-breeding population of marked individuals at the Revinge Area, outside Lund, southern Sweden. READ MORE

  5. 3. Age, Longevity and Life-History Trade-Offs in the Collared Flycatcher (Ficedula albicollis)

    Author : Joanna Sendecka; Lars Gustafsson; Anna Qvarnström; Pat Monaghan; Uppsala universitet; []
    Keywords : Ecology; age; collared flycatcher; Ficedula albicollis; long-term study; senescence; longevity; reproductive success; selection; individual quality; breeding experience; reproductive effort optimization; terminal investment; life-history trade-offs; reproductive costs; Ekologi;

    Abstract : Age is often a neglected factor in ecological studies. However, age-related changes in reproduction and survival of organisms may strongly influence population dynamics. READ MORE

  6. 4. Centralized Ovarian Cancer Care - Complications, Costs and Survival

    Author : Charlotte Palmqvist; Göteborgs universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Ovarian cancer; Survival; Centralization; Surgery; Cytoreduction; Residual disease; Postoperative complications; Cost of illness; Direct costs; Indirect cost; Epidemiology;

    Abstract : Background: Ovarian cancer is often diagnosed at advanced stages, and its mortality is high. Surgical treatment of advanced ovarian cancer strives toward complex primary debulking surgery (PDS), aiming for complete cytoreduction (R0) and improved survival. READ MORE

  7. 5. Reproductive allocation and costs of reproduction in subarctic herbs : A resource-based perspective

    Author : Åsa M. Hemborg; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ecology; Altitudinal gradient; Plant size; Predispersal seed predation; Reproductive effort; Resourcedynamics; Seasonal variation; Sexual dimorphism; Somatic costs; Unisexual plants; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi; ekologisk botanik; Ecological Botany;

    Abstract : The influence of internal and external factors on two major plant life history components, i.e., reproductive allocation and costs of reproduction, was examined for nine perennial herbs in subarctic Swedish Lapland. In one study, comparisons were made between Sweden and the French Alps. READ MORE