Search for dissertations about: "natural behaviour"

Showing result 6 - 10 of 1510 swedish dissertations containing the words natural behaviour.

  2. 6. Growth and Behaviour : Epigenetic and Genetic Factors Involved in Hybrid Dysgenesis

    Author : Wei Shi; Reinald Fundele; Diethard Tautz; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Interspecies hybridization; hybrid dysgenesis effect; speciation; genomic imprinting; epigenetics; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi;

    Abstract : In mammals, the most frequently observed hybrid dysgenesis effects are growth disturbances and male sterility. Profound defects in placental development have been described and our work on hybrids in genus Mus has demonstrated putative hybrid dysgenesis effects that lead to defects in lipid homeostasis and maternal behavior. READ MORE

  4. 7. Migratory behaviour of Baltic salmon (Salmo salar L.) : adaptive significance of annual cycles

    Author : Torleif Eriksson; Lars-Ove Eriksson; Kees Groot; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Migratory behaviour; annual cycles; Baltic salmon; Salmo salar; annual time program; swimming behaviour; mortality; maturity; life history;

    Abstract : This thesis evaluates the adaptive significance of annual cycles on the migratory behaviour of Baltic salmon (Salmo salar L.). The studies have included field experiments as well as laboratory studies gf maturity and migratory behaviour patterns of smolts and postsmolts mainly from the Angerman river population. READ MORE

  5. 8. Genomics and Transcriptomics of Behaviour and Plumage Colouration

    Author : Jesper Fogelholm; Dominic Wright; Göran Andersson; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Genomics; Transcriptomics; Behaviour; Colour; Gene Expresssion; Domestication.;

    Abstract : The aim throughout this thesis has been to investigate the underlying genetics of behaviours and feather colour and plumage patterns by using chickens as a model organism. Chickens are extremely important as a food source, both in terms of egg, as well as meat production. READ MORE

  6. 9. Neuromolecular and behavioural profile of teleosts : - effects of boldness, agonistic behaviour and reproductive status

    Author : Arshi Mustafa; Svante Winberg; Per Erik Olsson; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Histamine receptor 1 hrh1 ; histamine receptor 2 hrh2 ; histamine receptor 3 hrh3 ; boldness; personality; aggression; Histaminergic activity; Serotonergic activty 5-HIAA 5-HT ; Dopaminergic activty DOPAC DA ; spiegeldanio spd ; wild caught zebrafish; AB zebrafish; behaviour; brain.;

    Abstract : This thesis investigates if boldness is reflected in the function of brain histaminergic system in zebrafish (Danio rerio). Moreover, behavioural differences in AB line, spiegeldanio (spd) line and wild caught strain of zebrafish have also been explored apart from the winner-loser effect in AB and spd fish. READ MORE

  7. 10. Male moth behaviour and perception in pheromone plumes

    Author : Peter Valeur; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Djurekologi; Animal ecology; Grapholita molesta; Noctuidae; Lepidoptera; Tortricidae; behaviour; electrophysiology; single cell; flight tunnel; sex pheromone; wind tunnel; radar; flight; pre-exposure; mechanisms of mating disruption; Agrotis segetum; choice test;

    Abstract : Behaviour of male moths and electrophysiological responses of male pheromone-specific olfactory receptor neurones were studied in two model species, the oriental fruit moth Grapholita molesta and the turnip moth Agrotis segetum. The studies were aimed at elucidating the relative importance of different mating disruption mechanisms. READ MORE