Sökning: "morphological variation"

Visar resultat 1 - 5 av 151 avhandlingar innehållade orden morphological variation.

  1. 1. Ecology and Evolution of Adaptive Morphological Variation in Fish Populations

    Författare :Richard Svanbäck; Peter Eklöv; Lennart Persson; Beren Robinson; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; competition; functional morphology; individual specialization; inter-individual variation; intra-population variation; morphological variation; ontogeny; Perca fluviatilis; perch; phenotypic plasticity; predation; trade-offs; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

    Sammanfattning : The work in this thesis deals with the ecology and evolution of adaptive individual variation. Ecologists have long used niche theory to describe the ecology of a species as a whole, treating conspecific individuals as ecological equivalent. LÄS MER

  3. 2. Bottlenecks and blowflies : Speciation, reproduction and morphological variation in Lucilia

    Författare :Ann-Britt Florin; Lisa Meffert; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Population size; speciation; Lucilia sericata; morphological variation; Lucilia illustris; bottlenecks; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; Animal Ecology; zooekologi;

    Sammanfattning : This thesis attempts to improve our understanding of the role of population size for the process of speciation. First, the effect of population size on speciation is studied using several meta-analyses of published laboratory experiments. LÄS MER

  4. 3. Återbesök i Eskilstuna : En undersökning av morfologisk variation och förändring i nutida talspråk

    Författare :Eva Sundgren; Lars-Gunnar Andersson; Bengt Nordberg; Uppsala universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Scandinavian languages - general; Sociolinguistic variation; language change; spoken Swedish; Eskilstuna; morphology; real time; apparent time; panel study; trend study; individual change; generational change; intralinguistic constraints; salience; quantitative analysis; implicational scaling; local integration; social mobility; Nordiska språk - allmänt; Scandinavian languages; Nordiska språk; nordiska språk; Scandinavian Languages; Languages and linguistics;

    Sammanfattning : Real-time replications of empirical studies of language use are scarce. This study of language change in real time replicates an investigation of the social variation of spoken Swedish in the medium-sized town of Eskilstuna, using data collected 29 years after the original study. LÄS MER

  5. 4. Syntaktisk variation och förändring : en studie av subjektslösa satser i fornsvenska

    Författare :David Håkansson; Christer Platzack; Tor Anders Åfarli; tolkning i offentlig sektor och översättning danska och isländska Avdelningen för svenska; []
    Nyckelord :HUMANIORA; HUMANITIES; HUMANIORA; HUMANITIES; diachronic syntax; syntactic change; language variation; Old Swedish; referential subjects; null subjects; word order; information structure; verbal agreement; quantitative analysis; Scandinavian languages; Nordiska språk; Scandinavian Languages; Nordiska språk; information structure; word order; null subjects; referential subjects; Old Swedish; language variation; diachronic syntax; syntactic change; verbal agreement; quantitative analysis;

    Sammanfattning : The topic of this thesis is subjectless clauses in Old Swedish (1225–1526). The thesis focuses on referential subjects, and addresses the problem of why the possibilities to leave out such subjects have been reduced during the history of Swedish. The dissertation consists of three main parts, divided into eight chapters. LÄS MER

  7. 5. Changing Identities : Language Variation on Czech Television

    Författare :Tora Hedin; Barbro Nilsson; Karel Šebesta; Karel Kučera; Stockholms universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Czech discourse analysis; Czech language; Czech linguistics; codification; television discourse; linguistic norm; linguistic variation; code-switching; post-Communist media; Slavic languages; Slaviska språk;

    Sammanfattning : This study examines different aspects of language variation in contemporary Czech television discourse. The modern Czech language is characterised by a specific linguistic situation in which speakers must choose between two varieties – Standard Czech (SC) and Common Czech (CC). LÄS MER