Search for dissertations about: "spatial vision"

Showing result 1 - 5 of 102 swedish dissertations containing the words spatial vision.

  2. 1. Spatial vision in diverse invertebrates

    Author : John Kirwan; Funktionell zoologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; vision; visual ecology; invertebrates; spatial resolution; behaviour;

    Abstract : Light-detection provides incomparabaly rapid information at a range of time scales and, consequently, directional photoreception is found in almost every major metazoan clade. Conversely, a much smaller cohort have evolved sophisticated high resolution vision, which facillitates complex tasks via the detection of fast or small objects,. READ MORE

  4. 2. Spatial Vision in Birds: Anatomical investigation of spatial resolving power

    Author : Mindaugas Mitkus; Funktionell zoologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Raptors; Seabirds; Parrots; Birds; Double cones; Development; Retinal ganglion cells; Visual spatial resolution; Visual ecology; Vision;

    Abstract : Avian eyes are big both in relative and absolute terms, thus the importance of vision to birds is obvious. Even though the general eye plan is rather conservative throughout the group, there is a great variation in visual capabilities. READ MORE

  5. 3. Bird Vision: Spatial acuity and colour discrimination in bright and dim light

    Author : Olle Lind; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Animal vision; Visual ecology; Colour vision; Spatial acuity; Spatial contrast sensitivity; Dim light; Visual modelling; Behavioural experiments; Birds; Psittaciformes;

    Abstract : Birds use vision to guide navigation, foraging and mate choice, and studies of the limitations in bird visual perception are most helpful for the understanding of bird ecology. Here, I present four studies of bird vision in bright and dim light. READ MORE

  6. 4. Spatial Vision in Bees : Behavioural investigation of spatial resolution and contrast sensitivity

    Author : Aravin Chakravarthi; Funktionell zoologi; []
    Keywords : Insect vision; Honeybees; Bumblebees; Spatial resolution; Contrast sensitivity; Motion detection; Object discrimination;

    Abstract : Bees use multiple sensory modalities to perform day-to-day tasks. Light allows them to perceive objects and the general features of their surroundings, enabling them to find food and to navigate safely across the landscape. READ MORE

  7. 5. Neurons against Noise : Neural adaptations for dim light vision in hawkmoths

    Author : Anna Stöckl; Funktionell zoologi; []
    Keywords : vision; insect; hawkmoth; motion vision; spatial and temporal summation; dim light; neural processing;

    Abstract : All animals perceive the world through their senses, which form the basis for their decisions and motor actions. However, when these all-important senses reach their limit and cease to provide reliable information, the animal’s survival is threatened. READ MORE