Sökning: "DIPTERA"

Visar resultat 1 - 5 av 26 avhandlingar innehållade ordet DIPTERA.

  1. 1. Ultrastructural and systematic studies of cecidomyiidae (Diptera)

    Författare :Ruben Tastás-Duque; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Gallmyggor; tvåvingar; cecidomyiidae; diptera;

    Sammanfattning : Examination of the abdomen of the adult female and the head capsule of the mature larva indicates the grat utility of the Scanning Electron Microscope (SEM) in examining structures when searching for useful characters to deal with the taxonomy and phylogeny of gall midges (Diptera: Cecidomyiidae). Some of the structures found represent adaptations of limited value for phylogenetic considerations at higher levels. LÄS MER

  3. 2. Taxonomical and biological studies of Tephritis species (Diptera) and their parasitoids (Hymenoptera)

    Författare :Lars-Åke Janzon; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Djurparasitologi; Diptera; Hymenoptera; Insekter;

    Sammanfattning : .... LÄS MER

  4. 3. The Evolution of Sexually Homologous Ornaments : Selection via Male Mate Choice Coinciding with Male-Male Competition in a Neotropical Mosquito

    Författare :Sandra South; Göran Arnqvist; Russell Bonduriansky; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; sexual selection; Sabethes cyaneus; Diptera; Culicidae; mosquito; mutual ornamentation; sexual selection; mutual mate choice; male mate choice; female ornament; ecology; animal behaviour; Ethology and behavioural ecology; Etologi och beteendeekologi; Animal Ecology; Zooekologi;

    Sammanfattning : The evolution of elaborate male ornaments via sexual selection is well-understood while the selective pressures acting on female ornaments remains unresolved. Female ornaments in species with strong sexual selection on the male homologue of the ornament were originally thought to result from an intersexual genetic correlation. LÄS MER

  5. 4. Molecules and morphology in Empidoidea (Diptera) : Phylogenetic analysis and taxonomical implications

    Författare :Emma Wahlberg; Kjell Arne Johanson; Thomas Pape; Jeffrey Cumming; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Empidoidea; Empididae; Hybotidae; phylogeny; taxonomy; systematics; molecular data; morphology; revision; Systematic Zoology; zoologisk systematik och evolutionsforskning;

    Sammanfattning : The classification and evolutionary history of the superfamily Empidoidea (Diptera) have been far from straightforward subjects. Morphology based phylogenies of the superfamily have been unable to answer many questions raised by both systematists and biogeographers, as well as ecologists and ethologists, partly due to morphological modifications and adaptations difficult to interpret. LÄS MER

  7. 5. Suspension-feeding of mosquito larvae (Diptera: Culicinae) : morphological, behavioural and hydrodynamic aspects

    Författare :Lars-Erik Widahl; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : .... LÄS MER