Search for dissertations about: "Paternal effects"

Showing result 1 - 5 of 46 swedish dissertations containing the words Paternal effects.

  2. 1. Egg size evolution and paternal care in pipefishes

    Author : Inês Braga Gonçalves; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Egg size; embryo development; embryo survival; hypoxia; male quality; mate choice; mating constraints; oxygen; parental care; parental effects; paternal care; reproductive compensation; sex-role reversal; sexual conflict; Syngnathidae; Syngnathus typhle;

    Abstract : In this thesis I explore how sexual selection, sexual conflicts, coevolution with parental care and an environmental selective agent (hypoxia) affect the evolution of different egg characteristics and embryo survival and size in pipefishes (Syngnathidae). In the broad-nosed pipefish, Syngnathus typhle Linnaeus, both sexes prefer to mate with large partners; large females produce more and larger eggs and large males can care for more young, and, as shown in this thesis, invest more per embryo and provide better oxygenation during brooding. READ MORE

  4. 2. Geographic Variation, Hybridization and Evolution in the Bladder Campions, Silene vulgaris and S. uniflora (Caryophyllaceae)

    Author : Eva Månsby; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; chemotaxonomy. Physiology of nonvascular plants; Systematisk botanik; Växtgenetik; Systematic botany; taxonomy; morphology; phytogeography; Plant genetics; Paternal effects; Seed polymorphism; Ecology; Ekologi; Crossing barriers; cpDNA markers; Genetic variation; Hybridization; Post-glacial migration; Allozymes; Silene vulgaris; Silene uniflora; taxonomi; morfologi; kemotaxonomi. Växters fysiologi inte kärlväxter .;

    Abstract : In the present thesis, I investigated the inter- and intraspecific variation in the Silene vulgaris/uniflora species-complex (the bladder campions). I have focused on the effects of past and present hybridization both on a large scale ? over the whole of Europe ? and on a local scale. Silene vulgaris and S. READ MORE

  5. 3. Reproductive investment in Syngnathus typhle, the broad-nosed pipefish

    Author : Ines Goncalves; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Syngnathidae; sex-role reversal; paternal care; male quality; female choice; maternal effects; reproductive compensation; embryo development; brood reduction.;

    Abstract : Manuscripts: 1 - Reproductive compensation by broad-nosed pipefish females. 2 - Male size is a predictor of quality of parental care in the broad-nosed pipefish... READ MORE

  6. 4. Indirect effects of unemployment and low earnings : Crime and children's school performance

    Author : Anna Nilsson; Jonas Agell; Rudolf Winter-Ebmer; Stockholms universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Economics; Nationalekonomi;

    Abstract : This thesis consists of three self-contained essays that consider indirect effects of unemployment and low earnings on crime and children’s school performance. The first essay, Crime, unemployment and labor market programs in turbulent times (joint with Jonas Agell), investigates the effect of unemployment and participation in labor market programs, in general and among youth, on Swedish crime rates using a new panel data set for Swedish municipalities for the period 1996-2000. READ MORE

  7. 5. Fetal programming and parent-of-origin effects of type 2 diabetes and insulin secretion

    Author : Gad Hatem; diabetes och endokrinologi Genomik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Type 2 Diabetes; fetal programming; parent-of-origin effects; transcriptopmics;

    Abstract : Abstract Type 2 diabetes mellitus (T2DM) is a heterogeneous and a complex disease defined by hyperglycemia. Thepancreas and its islets are central for glucose homeostasis and healthy adipose tissue. In turn, lipid levels in the bloodare crucial for glucose level stability. READ MORE