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Visar resultat 1 - 5 av 7 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Female choice and paternal care in the fifteen-spined stickleback, Spinachia spinachia

    Författare :Sara Östlund-Nilsson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; fifteen-spined stickleback; spinachia spinachia; female choice; paternal care; nest building; ornament; fanning; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; Animal Ecology; zooekologi;

    Sammanfattning : In the fifteen-spined stickleback, Spinachia spinachia, males provide females with direct benefits by fanning, cleaning and guarding the offspring. Males announce their parental skills through intense body shakes during courtship. Females preferred to mate with more intensely shaking males. LÄS MER

  3. 2. 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

  4. 3. Könsskillnadens estetik? Om konst och konstskapande i svensk hemslöjd på 1920- och 1990-talen

    Författare :Johanna Rosenqvist; Anna Lena Lindberg; Jorunn Veiteberg; Avdelningen för konsthistoria och visuella studier; []
    Nyckelord :HUMANIORA; HUMANITIES; Handicraft; Art history; feminist art theory; Konsthistoria; Aesthetics; Art History; Konstvetenskap; fields of art; Folk art; ornament; Arts and Crafts; Modernism; Post modernism; textile art; Sloyd; The National Association of Swedish Handicraft Societies; Estetik; handdicraft; Art;

    Sammanfattning : The main objective of this PhD thesis, "An Aesthetics of Sexual Difference? On Art and Artistry in Swedish Handicraft of the 1920s and 1990s", is to investigate the field of handicraft in relation to a wider field of cultural production. Its aim is to contribute to a mapping of interrelated outlines of handicraft and art based on empirical studies of artistic creation in two local Swedish handicraft organizations during the modernism of the 1920s and the postmodernism of the 1990s. LÄS MER

  5. 4. Female coloration, egg carotenoids and reproductive success: gobies as a model system

    Författare :P. Andreas Svensson; Trond Amundsen; Jonathan Blount; Trondheim NTNU Department of Biology; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Akvatisk ekologi; Aquatic Ecology; Evolutionary Biology; Evolutionsbiologi;

    Sammanfattning : In two-spotted gobies (Gobiusculus flavescens), females develop an orange belly as they approach sexual maturity. Toward the end of the single breeding season, males become rare and females compete for spawnings. Nest-holding males then prefer females with more colourful bellies and this trait has been suggested to act as a female ornament. LÄS MER

  7. 5. Fishing for Females : Sensory Exploitation in the Swordtail Characin

    Författare :Mirjam Amcoff; Niclas Kolm; Michael Ryan; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Sexual selection; Mate choice; Courtship; Sensory bias; Plasticity; Corynopoma riisei; Mulitiple signalling; Biologi med inriktning mot zooekologi; Biology with specialization in Animal Ecology;

    Sammanfattning : Mate choice plays an important role in sexual selection and speciation. The evolution of mate choice is intriguing in cases where choosy individuals gain little except for genetic material from the mate and where the trait used as a criterion for the choice is costly to its bearer. LÄS MER