Sökning: "Sex ratio"

Visar resultat 11 - 15 av 280 avhandlingar innehållade orden Sex ratio.

  1. 11. Endogenous sex hormones and cardiometabolic risk factors – population-based studies within the Skaraborg Project

    Författare :Kristin Ottarsdottir; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Sex hormones; sex hormone binding globulin; cardiometabolic risk factors; insulin resistance; post-menopause; cardiovascular diseases;

    Sammanfattning : Cardiovascular diseases are the major contributors to mortality in Sweden and globally. Men have a higher incidence of cardiovascular diseases compared to women, until women reach the menopause. Levels of sex hormones might explain these sex differences beyond known differences in risk factors. LÄS MER

  3. 12. Infidelity in Birds – Causes and Consequences of Extra-pair Paternity

    Författare :Jakob Augustin; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; extra-pair paternity; genetic benefits; heterozygosity; sex ratio; Riparia riparia; Tringa totanus; Vanellus vanellus; Charadrius alexandrinus;

    Sammanfattning : Forty years ago, more than 90% of bird species were classified as monogamous and not very exciting systems for studies of e.g. sexual selection. LÄS MER

  4. 13. Gender inequity in child survival : travails of the girl child in rural north India

    Författare :Anand Krishnan; Nawi Ng; Peter Byass; Chadrakant Pandav; Per Ashorn; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Conditional cash transfers; girl child; inequities; gender; prejudice; mortality; non-specific effects; sex; socio-economic; vaccines; Epidemiology; epidemiologi;

    Sammanfattning : Background: While substantial progress has been made globally towards achieving United Nations Millennium Development Goal 4 (MDG 4) on child mortality, the decline is not sufficient to reach the targets set for 2015. The South Asian region, which includes India, was to achieve the MDG 4 target of 39 deaths per 1000 live births by 2015 but was estimated to have reached only 61 by 2011. LÄS MER

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

    Författare :Erik Svensson; Evolutionär ekologi; []
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

  7. 15. Causes and treatment of chronic respiratory failure : experience of a national register

    Författare :Torbjörn Gustafson; Kerstin Ström; Karl Franklin; Kjell Torén; Kurt Boman; Leif Bjermer; Umeå universitet; []
    Nyckelord :Internal medicine; Invärtesmedicin; chronic obstructive pulmonary disease; pulmonary fibrosis; kyphoscoliosis; respiratory failure; sex; smoking; occupation; survival; long-term oxygen therapy; mechanical ventilation; lungmedicin; Lung Medicine;

    Sammanfattning : Long-term oxygen therapy (LTOT) or home mechanical ventilation (HMV) can improve survival time in chronic respiratory failure. A national quality register could be an aid to identifying risk markers and optimizing therapy for respiratory failure. LÄS MER