Sökning: "cichlid"

Visar resultat 1 - 5 av 9 avhandlingar innehållade ordet cichlid.

  1. 1. Thinking in water : Brain size evolution in Cichlidae and Syngnathidae

    Författare :Masahito Tsuboi; Niclas Kolm; Andrew Iwaniuk; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; brain evolution; phylogenetic comparative method; the expensive tissue hypothesis; cichlid; pipefish; seahorse; Biologi med inriktning mot zooekologi; Biology with specialization in Animal Ecology;

    Sammanfattning : Brain size varies greatly among vertebrates. It has been proposed that the diversity of brain size is produced and maintained through a balance of adaptations to different types and levels of cognitive ability and constraints for adaptive evolution. LÄS MER

  2. 2. Morphological and Physiological Adaptations in Cichlid Crystalline Lenses

    Författare :Marcus Schartau; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; SKF-38393; D1-agonist; optical properties 6-hydroxydopamine; optical measurements; organ culture; dopamine; teleost; lens circulation; Lens; SCH-23390; melatonin; multifocal optical system;

    Sammanfattning : Vertebrate eyes share a common ancestry as well as the basic design with a pupil, a retina and a lens. The lens is essential for perceiving the details in the world around us and ensures that a sharp image of the surroundings is focused onto the photoreceptors in the retina. LÄS MER

  3. 3. Aggressive behaviour between territorial cichlid fish and its regulation

    Författare :Anders Fernö; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; behaviour; animal; fishes; Djursociologi; fiskar;

    Sammanfattning : .... LÄS MER

  4. 4. Reproductive behaviour of a monogamous cichlid fish Tilapia mariae

    Författare :Erkki Schwanck; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Ciklider;

    Sammanfattning : .... LÄS MER

  5. 5. Risk assessment and contest behaviour in the Cichlid fish Nannacara anomala

    Författare :Olle Brick; Felicity A. Huntingford; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; zoologi; Zoology;

    Sammanfattning : The risk of predation is an important factor for our understanding of animal behaviour in general. This thesis investigates the influence of predation risk on fighting behaviour in the cichlid fish Nannacara anomala. LÄS MER