Sökning: "trade route"

Visar resultat 1 - 5 av 26 avhandlingar innehållade orden trade route.

  1. 1. Defence on Demand : A physiological perspective on phenotypic plasticity in anti-predator traits

    Författare :Jerker Vinterstare; Enhet akvatisk ekologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Phenotypic plasticity; inducible defences; stress physiology; cortisol; immune function; trade-offs; sexual dimorphism; crucian carp; visual ecology; predator-prey interactions; POMC pro-opiomelanocortin ; colour change; eco-immunology; Anti-predator defences; Inducible morphological defence; Phenotypic plasticity; Stress physiology; Cortisol; Immune function; Crucian carp; Predator-prey interactions; Trade-offs; Sexual dimorphism; POMC; Pro-opiomelanocortin; Visual ecology; Eye evolution; Melanin; Eco-immunology; Pace-of-life; Behavioural plasticity;

    Sammanfattning : Almost all species face some degree of predation risk, and, hence, evolution has produced a plethora of anti-predator defences. However, anti-predator strategies require resources, and the prevailing risk of becoming prey is influenced by many factors and rarely constant across time and space. LÄS MER

  3. 2. Norberg och Järnet : Bergsmännen och den medeltida industrialiseringen

    Författare :Ing-Marie Pettersson Jensen; Gert Magnusson; Anders Carlsson; Eva Svensson; Stockholms universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; iron production; mining; trade; landownership; social structure; Sweden; Dalarna; Västmanland; Viking Age; Middle Ages; arkeologi; Archaeology;

    Sammanfattning : This thesis is an archeological study of continuity and change in mining and settlement 1000 – 1500. At the time for the earliest possible introduction of mining, in the mid-10th century, the primary area for Norbergs’ mining district was sparsely settled, but in the late Viking Age and/or early Middle Ages, the analyses demonstrate a significant agricultural expansion. LÄS MER

  4. 3. Klädd Krigare : Skifte i skandinaviskt dräktskick kring år 1000

    Författare :Annika Larsson; Anne-Sofie Gräslund; Svante Norr; Lise Bender Jorgenssen; Uppsala universitet; []
    Nyckelord :Archaeology; warrior; viking age; armour; rigsthula; bayeux tapestry; birka; coin; sigtuna; runic; baptism; rus; khazar; metal wire; textile; christianisation; silk road; canute the great; mercenaries; trade route; dresscode; virtuous woman; kingship; frisian cloth; Arkeologi;

    Sammanfattning : Using textiles as clues, it is shown that, like in the rest of Scandinavia, there is a legible societal shift in favour of a new Christian organization as early as around year 1000 even in the central parts of what is now Sweden, including the, according to Adam of Bremen, “pagan” Mälar valley. During a period of at least a hundred and fifty years, the Mälar valley with Birka in the centre had enjoyed eastern trade, which is reflected in the rich finds of oriental textile fragments in the Birka graves. LÄS MER

  5. 4. Essays on trade, growth and applied econometrics

    Författare :Patrik Gustavsson Tingvall; Handelshögskolan i Stockholm; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Sammanfattning : This dissertation consists of five essays. Three of these study countries’ specialisation patterns combining the two classical paradigms of trade theory, namely the Ricardian (technology) and the HeckscherOhlin (factor endowments) framework. LÄS MER

  7. 5. Causes and consequences of blood parasite infections in birds

    Författare :Martin Stjernman; Biodiversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Animal physiology; Djurfysiologi; Parasitologi människa och djur ; Parasitology human and animal ; maternal transfer; stabilising selection; parasite resistance; parasites; trade-off; cost of reproduction; Ficedula hypoleuca; pied flycatcher; Haemoproteus; blue tit; Parus caeruleus;

    Sammanfattning : Parasites are ubiquitous and can cause significant fitness reductions to their hosts. Therefore, selection for the evolution of host resistance should be strong. However, resistance may be costly and should be traded-off against other fitness related traits. LÄS MER