Sökning: "parental investment"

Visar resultat 6 - 10 av 29 avhandlingar innehållade orden parental investment.

  1. 6. Gender, Incentives, and the Division of Labor

    Författare :Ylva Moberg; Eva Mörk; Helena Holmlund; Mari Rege; Uppsala universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Parental Leave; Division of Labor; Labor Supply; Same-sex Couples; Transition to Parenthood; Gender Norms; Housing Allowance; In-Work Tax Credits; Take-Up of Transfer Programs; Secondary Earners’ Participation Elasticity; Föräldraledighet; arbetsfördelning; samkönade par; föräldraskap; könsnormer; bostadsbidrag; skatte- och bidragssystem; incitament; arbetskraftsdeltagande; arbetsutbudselasticitet; Economics; Nationalekonomi;

    Sammanfattning : This thesis consists of four self-contained essays. Essay 1: The length of parental leave entitlements is known to affect take-up rates, division of parental leave between parents, and the mother's decision to return to work. So far, however, the importance of the level of benefit has received little attention in the literature. LÄS MER

  3. 7. Paternal care, filial cannibalism and sexual conflict in the sand goby, Pomatoschistus minutus

    Författare :Maria Lissåker; Charlotta Kvarnemo; Ulrika Candolin; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; female choice; filial cannibalism; Gobiidae; parental care; Pomatoschistus minutus; sand goby; sexual conflict; sexual selection; Biology; Biologi;

    Sammanfattning : Natural and sexual selection and sexual conflict are forces shaping the evolution of reproductive behaviour, while constrained by factors like environment, physiology and life-history trade-offs. Parental care is costly both in terms of time and energy. LÄS MER

  4. 8. Behaviour and life-history responses to chick provisioning under risk of nest predation

    Författare :Sönke Eggers; David Winkler; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; Chick provisioning; clutch size; delayed dispersal; nest concealment; nest predation; parental care; population decline; Perisoreus infaustus; Siberian jay; Biologi; Biology; Biologi; populationsbiologi; Population Biology;

    Sammanfattning : This thesis examines risk management in breeding Siberian jays (Perisoreus infaustus), which is indigenous to the northern taiga. Parent behaviour and the nest are cryptic. A new nest is built each year. It is placed on spruce or pine branches close to the trunk and well insulated with lichens, feathers and reindeer hair. LÄS MER

  5. 9. Getting informed in a risky world : risk assessment, predator information & parental decisions

    Författare :Nicole Schneider; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Predation ultimately affects the fitness of individuals. In nest building species like birds, the predation of dependent offspring is the most important source of reproductive failure, favouring the selection of parental adaptations to enhance offspring survival. LÄS MER

  7. 10. The Nepotistic Parent; Predator Protection, Kinship and Philopatry

    Författare :Michael Griesser; Jan Ekman; Ronald Mumme; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; referential alarm calls; delayed dispersal; nepotism; vigilance; alarm calling; mobbing; extended parental care; families; Perisoreus infaustus; Siberian jay; Biologi; Biology; Biologi; populationsbiologi; Population Biology;

    Sammanfattning : Evolution is fuelled by independent reproduction events. Yet, the offspring of at least three percent of all bird species postpone dispersal and forego independent reproduction. LÄS MER