Sökning: "life history evolution"

Visar resultat 16 - 20 av 115 avhandlingar innehållade orden life history evolution.

  1. 16. Tomorrow is yesterday: early-life conditions shape ectotherm life histories

    Författare :Alexander Hansson; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; life history; ectotherm; temperature; development; sex; telomere; senescence;

    Sammanfattning : Life history theory seeks to explain the overwhelming diversity of resource allocation strategies in nature by exploring how evolutionary forces optimise survival and reproduction within an organism’s environment. Central to this theory is that resources are finite, and thus increased investment into one trait may reduce resources available for another trait. LÄS MER

  3. 17. Body Size Evolution in Butterflies

    Författare :David Berger; Karl Gotthard; Wolf Blanckenhorn; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Body size evolution; age- and size at maturity; life history theory; fecundity; predation risk; juvenile growth rate; Lepidoptera; Biology; Biologi; zoologisk ekologi; Animal Ecology;

    Sammanfattning : Life history research deals with the scheme of resource partitioning to a wide spectra of processes and the trade-offs shaping these events. One of the most fundamental life history trade-offs is the one of at which age- and size an organism should start to reproduce; reaching a large size at maturity is often advantageous in terms of high adult survival and reproductive potential, while to attain a larger size the organisms must prolong juvenile development which is assumed costly in terms of mortality. LÄS MER

  4. 18. Behavioural, physiological and morphological correlates of life-history in killifishes − a macroevolutionary approach

    Författare :Simon Eckerström-Liedholm; Alejandro Gonzalez Voyer; Björn Rogell; Alastair Wilson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; brain size evolution; comparative analysis; life-history continuum; risk-taking behaviour; sexual selection; trade-offs; etologi; Ethology;

    Sammanfattning : Life-histories commonly evolve along a continuum from short-lived and fecund, to long-lived and less fecund. Because life-history traits are mostly components of reproduction and survival, understanding the causes and consequences of life-history variation is at the core of evolutionary biology. LÄS MER

  5. 19. Migratory behaviour and adaptive divergence in life-history traits of pike (Esox lucius)

    Författare :Petter Tibblin; Per Larsson; Anders Forsman; Asbjørn Vøllestad; Linnéuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; conservation; evolution; homing; local adaptation; management; phenotypic variation; population divergence; selection; sympatric;

    Sammanfattning : Population divergence shaped by natural selection is central to evolutionary ecology research and has been in focus since Darwin formulated “The origin of species”. Still, the process of adaptive divergence among sympatric populations is poorly understood. LÄS MER

  7. 20. The Membrane Proteome : Evolution, Characteristics and Classification

    Författare :Markus Sällman Almén; Helgi Schiöth; Robert Fredriksson; Marc Robinson-Rechavi; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Membrane proteins; Membrane proteome; molecular evolution; GPCRs; Dispanins; IFITM; Medicinsk vetenskap; Medical Science;

    Sammanfattning : Membrane proteins are found in all kingdoms of life and are essential for cellular interactions with the environment. Although a large research effort have been put into this group many membrane proteins remains uncharacterized, both in terms of function and evolutionary history. LÄS MER