Search for dissertations about: "Per G. P. Ericson"

Found 5 swedish dissertations containing the words Per G. P. Ericson.

  2. 1. Osteology of the eider : Somateria mollissima (L.) : a study of sexual, geographic and temporal morphometric variation in the eider skeleton

    Author : Per G. P. Ericson; Stockholms universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Abstract : .... READ MORE

  4. 2. Molecular systematics of the antbird-ovenbird complex (Aves: Furnariida)

    Author : Martin Irestedt; Per G. P. Ericson; Richard O. Prum; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; systematics phylogeny DNA antbird ovenbird; Biology; Biologi;

    Abstract : This thesis concerns the phylogenetic relationships among suboscine birds with special emphasis on the antbird-ovenbird complex (Aves: Furnariida). The principal aim is to produce a framework for future systematic and comparative studies of suboscines by generating robust phylogenetic hypotheses from DNA-sequence data. READ MORE

  5. 3. Molecular phylogeny of tyrant flycatchers, cotingas, manakins and their allies (Aves: Tyrannida)

    Author : Jan I. Ohlson; Per G. P. Ericson; Cristina Y. Miyaki; Stockholms universitet; []
    Keywords : Suboscines; Tyrannida; Tyrannidae; Cotingidae; Pipridae; South America; phylogeny; evolution; adaptive radiation; NATURAL SCIENCES; NATURVETENSKAP; Systematic Zoology; zoologisk systematik och evolutionsforskning;

    Abstract : Tyrannida is a monophyletic clade that together with Furnariida constitutes the New World suboscines. The ca 560 species in Tyrannida are traditionally divided between three families: Tyrannidae (tyrant flycatchers), Cotingidae (cotingas) and Pipridae (manakins). READ MORE

  6. 4. Integrative taxonomy of birds : Studies into the nature, origin and delimitation of species

    Author : George Sangster; Per G. P. Ericson; Martin Päckert; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Aves; biogeography; integrative taxonomy; pluralism; ring species; speciation; species criteria; species limits; taxon chain; Systematic Zoology; zoologisk systematik och evolutionsforskning;

    Abstract : Species are the basic currency in biodiversity studies but what constitutes a species has long been controversial. A major breakthough was the insight that most systematists agree that species are segments of population lineages, and that multiple lines of evidence should be employed and integrated, a procedure called integrative taxonomy. READ MORE

  7. 5. Fossil birds: Contributions to the understanding of avian evolution

    Author : Johan Dalsätt; Otto Hermelin; Per Ericson; Zbigniew M. Bocheński; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; General and Historical Geology; allmän och historisk geologi;

    Abstract : The study of the evolution of birds began about 150 years ago with the finding of Archaeopteryx. Yet, many unsolved questions about avian evolution remain to be answered. This thesis aims at addressing some of these questions.The Early Cretaceous Confusiusornis is the most well-represented Mesozoic bird in the fossil record. READ MORE