Search for dissertations about: "nestling"

Showing result 1 - 5 of 24 swedish dissertations containing the word nestling.

  2. 1. Female reproductive strategies and sexual conflicts in a polygynous mating system

    Author : Maria Sandell; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; female aggression; nestling feeding; intraspecific brood parasitism; mating system; parental investment; sexual conflict; intrasexual competition; Animal ecology; Djurekologi;

    Abstract : In this thesis, I have investigated conflicts of interest in the facultatively polygynous European starling (Sturnus vulgaris) with a focus on female reproductive strategies. The extent to which males provided parental care was a key issue in understanding the mating system of the starling. READ MORE

  4. 2. The MHC genes: variation and impact on life-history traits in house sparrwos

    Author : Maria Karlsson; MEMEG; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; MHC-I; house sparrow; 454-amplicon sequencing; cDNA; functional clustering; trans-species evolution; nestling survival; mate-choice;

    Abstract : In birds the major histocompatibility complex (MHC) organization differs both among and within orders. Galliformes often have simple arrangements with few transcribed MHC genes whilst many songbirds (Passeriformes) have a complex arrangement with many MHC genes and also presence of pseudo-genes. READ MORE

  5. 3. 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

  6. 4. Genetic variation and phenotypic plasticity in body traits of nestling blue tits

    Author : Camilla Kunz; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; populationsbiologi; Population Biology;

    Abstract : This thesis examines genetic and environmental contributions to variation in body traits in a population of free-living blue tits. It also investigates possible consequences for the evolution of body size. READ MORE

  7. 5. Metals take flight : Transport and effects across ecosystems

    Author : Johan Lidman; A. M. M. Berglund; Micael Jonsson; Christian Bigler; Brendan Mckie; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Metals; aquatic subsidies; passerines; aquatic insects; environmental science; miljövetenskap; ekotoxikologi; Ecotoxicology;

    Abstract : Metal contamination can have severe toxic effects in the ecosystems, resulting in loss of biodiversity, reduced abundance of organisms, and loss of ecosystem services. Traditionally, aquatic ecosystems have been regarded as a sink of metal contamination. READ MORE