Search for dissertations about: "mammals"

Showing result 1 - 5 of 374 swedish dissertations containing the word mammals.

  2. 1. Molecular Phylogenetics of Mammals

    Author : Morgan Kullberg; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Genetics; EST; divergence times; phylogenomics; phylogenetic reconstruction; Mammals; Eutheria; cytogenetics; Genetik; cytogenetik;

    Abstract : In this thesis, the phylogenetic relationships of the Mammalia have been studied at various levels. Different sources of genetic information have been evaluated and used as phylogenetic markers. These include the well-known mitochondrial genome, cDNA from housekeeping genes and expressed sequence tags from nuclear genes. READ MORE

  4. 2. Molecular ecology of marine mammals

    Author : Morten Tange Olsen; Per Palsbøll; Martine Bérubé; William “Bill” Amos; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Marine mammals; molecular ecology; life history; environmental change; phenotypic plasticity; SNPs; telomeres; molekylärgenetik; Molecular Genetics;

    Abstract : Marine mammals comprise a paraphyletic group of species whose current abundance and distribution has been greatly shaped by past environmental changes and anthropogenic impacts. This thesis describes molecular ecological approaches to answer questions regarding habitat requirements, genetic differentiation, and life-history trade-offs in three species of marine mammals. READ MORE

  5. 3. ELOVL2 and PUFA biosynthesis : Impact on sex-specific processes in mammals

    Author : Amanda González-Bengtsson; Anders Jacobsson; Christian Drevon; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; fysiologi; Physiology;

    Abstract : Endogenously synthesized PUFAs (Polyunsaturated Fatty Acids) vary in production depending on medical conditions, gender, developmental phase, age, fertility status, pregnancy and lactation. PUFA biosynthesis is further regulated via amount of dietary intake as well as genetically. READ MORE

  6. 4. The tempo and mode of evolution : a neontological reappraisal

    Author : Melanie Monroe; Folmer Bokma; Pär Ingvarsson; Mikael Fortelius; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; birds; extinction; macroevolution; mammals; microevolution; punctuated equilibrium; speciation;

    Abstract : The theory of “punctuated equilibrium” suggests that species evolve rapidly during or immediately upon speciation, “punctuating” long periods of little or no morphological evolution. Here I confirm that body size differences within clades of birds and mammals are best explained using a model of punctuated evolution. READ MORE

  7. 5. Molecular evolution of the neuropeptide Y receptor family : Insights from mammals and fish

    Author : Amanda Wraith; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Neurosciences; Neurovetenskap; Neurology; Neurologi; Neurology; neurologi;

    Abstract : Most genes in the genomes of vertebrates form families with multiple members that are more or less closely related. This thesis concerns investigations of the neuropeptide Y (NPY) family of peptides and the family of receptors to which these peptides bind, the NPY receptors. READ MORE