Search for dissertations about: "natural behaviour"

Showing result 1 - 5 of 1152 swedish dissertations containing the words natural behaviour.

  1. 1. Dog behaviour Intricate picture of genetics, epigenetics, and human-dog relations

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Ann-Sofie Sundman; Linköpings universitet.; Linköpings universitet.; [2019]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Dogs, Canis familiaris, share the lives of humans all over the world. That dogs, and the behavior of dogs, are of interest to many is therefore no surprise. In this thesis, the main aim has been to identify factors that affect dogs’ behaviours.The dog, Canis familiaris, is our first domesticated animal. READ MORE

  2. 2. Brain Aromatase in the guppy, Poecilia reticulata Distribution, control and role in behaviour

    University dissertation from Stockholm : Department of Zoology, Stockholm University

    Author : Stefan Hallgren; Södertörns högskola.; Södertörns högskola.; Stockholms universitet.; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES Biology; NATURVETENSKAP Biologi; NATURAL SCIENCES Biology Organism biology; NATURVETENSKAP Biologi Organismbiologi; funktionell morfologi; Functional Zoomorphology; Oestrogen production; behaviour; anatomy; endocrinology; bio markers; endocrine disruption;

    Abstract : Oestrogens are produced by aromatisation of androgens by the aromatase enzyme. In the vertebrate brain this synthesis has vital functions in nerve protection, cell proliferation and nerve development during injury respectively brain development. READ MORE

  3. 3. Characterisation of social behaviour in red junglefowl and White leghorn laying hens : phenotypic and genetic studies

    University dissertation from Linköping : Linköpings universitet

    Author : Johanna Väisänen; Linköpings universitet.; Linköpings universitet.; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Red junglefowl; social behaviour; behaviour tests; NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : The objective of this thesis was, by using two model strains of chicken, red junglefowl and White Leghorn layer, to study differences in social behaviour of the species that could be derived from domestication and production related selection processes. The social phenotype characterisation was done to be able to further study the association of the social differences to specific production related traits as well as to certain genome areas in intercross and backcross lines generated from these two parental populations. READ MORE

  4. 4. Static and time-dependent mechanical behaviour of preserved archaeological wood Case studies of the seventeenth century warship Vasa

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Alexey Vorobyev; Uppsala universitet.; [2017]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; archaeological wood; compression test; cubic samples; elastic constants; oak wood; barrelling formation; quasi-static loading; resonant ultrasound spectroscopy RUS ; Vasa ship; creep; 3D laser scanning; Time-dependent behaviour;

    Abstract : Wooden objects have been widely used in the history of humanity and play an important role in our cultural heritage. The preservation of such objects is of great importance and can be a challenging task. This thesis investigates the static and time-dependent mechanical behaviour of archaeological oak wood from the Vasa warship. READ MORE

  5. 5. Selective serotonin re-uptake inhibitors in the environment Effects of citalopram on fish behaviour

    University dissertation from Huddinge : Södertörns högskola

    Author : Martin Kellner; Södertörns högskola.; Södertörns högskola.; [2017]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Citalopram; SSRI; stickleback; Baltic; behaviour; fish; feeding; anxiety; boldness; serotonin; development; Storspigg; serotonin; östersjön; SSRI; läkemedel; miljö; citalopram; ätbeteende; beteende; utveckling; Environmental Studies; Miljövetenskapliga studier; Östersjö- och Östeuropaforskning; Baltic and East European studies;

    Abstract : Selective serotonin re-uptake inhibitors (SSRIs) are a class of anxiolytic and anti-depressant drugs. SSRIs act on the evolutionarily ancient serotonergic system which is virtually identical throughout the vertebrate phylum. READ MORE