Sökning: "funktionell zoomorfologi"

Visar resultat 11 - 13 av 13 avhandlingar innehållade orden funktionell zoomorfologi.

  1. 11. The brain-pituitary-gonadal axis of the three-spined stickleback, Gasterosteus aculeatus

    Författare :Yi Ta Shao; Bertil Borg; Sylvie Dufou; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; BPG axis; GnRH; lh-β; fsh-β; three-spined stickleback; Gasterosteus aculeatus; homeostasis; feedback; funktionell zoomorfologi; Functional Zoomorphology;

    Sammanfattning : The seasonal reproduction of the three-spined stickleback is stimulated by long day photoperiod. As in other vertebrates, the reproductive system of stickleback is regulated by the brain-pituitary-gonadal (BPG) axis which is largely controlled by feedback effects. Both negative and positive feedback effects on the BPG axis have been found in fish. LÄS MER

  3. 12. Unraveling the regulatory mechanisms of pupal diapause termination

    Författare :Philip Süess; Philipp Lehmann; Christian Wegener; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Diapause; diapause termination; prothoracicotropic hormone; ecdysone; thermal performance; Functional Zoomorphology; funktionell zoomorfologi;

    Sammanfattning : Diapause is an essential part of many insect’s life cycle and is a developmental halt induced by environmental cues in advance of deteriorating conditions. Insects typically enter diapause to avoid unfavorable environmental conditions like low temperatures, poor food quality and the absence of conspecifics. LÄS MER

  4. 13. Neuropeptides and GABA in control of insulin producing cells in Drosophila

    Författare :Jeannette Söderberg; Åsa Winther; Dick R. Nässel; Susan Broughton; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Drosophila; insulin signaling; metabolism; feeding; DTK; DSK; GABA; stress resistance; funktionell zoomorfologi; Functional Zoomorphology;

    Sammanfattning : Insulin plays an important role in metabolic regulation as well as in growth, fecundity and stress resistance. In order to understand more about the regulation of insulin-like peptide (DILP) production and release we investigate the impact of neuropeptide (DTK) signaling and classical neurotransmitter (GABA) signaling onto the insulin producing cells of the Drosophila brain. LÄS MER