Sökning: "Behavioural System"

Visar resultat 16 - 20 av 254 avhandlingar innehållade orden Behavioural System.

  1. 16. Resources, the environment, and sex : Examining variation in sexually selected traits in a livebearing fish

    Författare :Erika Fernlund Isaksson; John Fitzpatrick; Gil G. Rosenthal; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; mate choice; sexual selection; competition; resource restriction; condition dependence; etologi; Ethology;

    Sammanfattning : Striking variation is observed in sexually selected traits. These traits influence the outcome of competition and choice before and after mating. Before mating, animals compete for the access to mating partners and choose who to mate with between several potential mates. LÄS MER

  3. 17. Effect of elevated pCO2 and environmental oxazepam on the behavior and physiology of teleost fish

    Författare :Laura E. Vossen; Svante Winberg; Robert Gerlai; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; fish; GABA; CO2; ocean acidification; pharmaceutical pollution; oxazepam;

    Sammanfattning : This doctoral thesis investigated the effect of two aquatic pollutants on the behavior and physiology of teleost fish: i) elevated concentrations of carbon dioxide (CO2) in the context of ocean acidification and ii) low concentrations of the anxiolytic pharmaceutical oxazepam in the context of pharmaceutical pollution.Anthropogenic emissions of CO2 are lowering the pH of the oceans. LÄS MER

  4. 18. Behaviour under predation risk - antipredator strategies, behavioural syndromes and sex-specific responses in aquatic prey

    Författare :Sanna Harris; Biodiversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; phenotypic integration; Poecilia reticulata; Asellus aquaticus; behavioural syndromes; chemical cues; predation; antipredator behaviour;

    Sammanfattning : In many natural ecosystems, predation is well recognized as a strong evolutionary force, and predator-mediated selection has been demonstrated to induce changes in prey morphology, life history and behaviour. In my thesis, I have focused on behavioural responses in aquatic prey under the risk of predation. LÄS MER

  5. 19. Methylsulphonyl-chlorobenzenes and the olfactory system : Comparative toxicity of the 2,5- and 2,6-dichlorinated isomers in mice

    Författare :Fariba Bahrami; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; toxikologi; Toxicology;

    Sammanfattning : Methyl sulphone metabolites of chlorinated aryl hydrocarbons are persistentenvironmental pollutants that can bioaccumulate in animals and humans. Little is known about the toxicological effects of these metabolites and this thesis is an attempt to increase this limited knowledge. LÄS MER

  7. 20. The effects and experiences of internet-delivered cognitive behavioural therapy : The perspectives of patients with non-cardiac chest pain and healthcare professionals in the emergency and cardiac care

    Författare :Magda Eriksson-Liebon; Ghassan Mourad; Peter Johansson; Lilas Ali; Linköpings universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cardiac anxiety; Cognitive behavioural therapy; Internet-delivered; Non-cardiac chest pain; Patient experience; Psychological distress; Randomised controlled trial; Qualitative design;

    Sammanfattning : BackgroundNon-cardiac chest pain (NCCP) is a common issue, accounting for roughly half of all emergency department visits related to chest pain. Patients afflicted with NCCP often endure cardiac anxiety, misinterpreting the pain as heart-related and fearing it, despite the absence of any life-threatening cardiac issues. LÄS MER