Search for dissertations about: "corvids"

Showing result 1 - 5 of 8 swedish dissertations containing the word corvids.

  1. 1. On the origins of physical cognition in corvids

    University dissertation from Lund University Cognitive Studies

    Author : Ivo Jacobs; Lunds universitet.; Lund University.; [2017]
    Keywords : HUMANIORA; HUMANITIES; NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; physical cognition; causal cognition; tool use; evolution of cognition; anthropomorphism; corvids;

    Abstract : Physical cognition involves a host of cognitive abilities that enable understanding and manipulation of the physical world. Corvids, the bird family that includes crows, ravens and jays, are renowned for their cognitive abilities, but still little is known about their folk physics. READ MORE

  2. 2. Evolutionary genomics in Corvids – From single nucleotides to structural variants

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Matthias H. Weissensteiner; Uppsala universitet.; [2019]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; evolutionary genetics; genomics; population genetics; selection; recombination; chromosomal features; colouration; insertion; deletion; inversion; crow; tandem repeat; transposable element; gene expression;

    Abstract : Heritable genetic variation is the raw material of evolution and can occur in many different forms, from altering single nucleotides to rearranging stretches of millions at once. DNA mutations that result in phenotypic differences are the basis upon which natural selection can act, leading to a shift of the frequency of those mutations. READ MORE

  3. 3. Planning and inhibition in corvids

    University dissertation from mediatryck, Lund University

    Author : Can Kabadayi; Lunds universitet.; Lund University.; [2017-08]
    Keywords : HUMANIORA; HUMANITIES; executive functions; corvids; evolution of cognition; planning; inhibitory control; homoplasy;

    Abstract : Executive functions (EF) denote the host of top-down mental processes that mediate self-regulation to achieve a goal. Among other things, EF support cognitive flexibility by allowing inhibition of automatic responses in favour of obtaining future goals. READ MORE

  4. 4. Comparative Avian Cognition : Physical and Social Problem Solving in Corvids and Parrots

    University dissertation from University of York

    Author : Megan Lambert; [2016-10-21]
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Abstract : Within the last few decades, investigations of problem solving in avian species such as corvids have challenged the few that complex cognitive abilities are unique to the primate lineage, and provide a compelling case for the convergent evolution of cognition in a range of large-brained, socially complex species. Despite these advances, there is still much that is unknown about how corvids acquire and use information to solve problems in both their social and physical environments, and comparably little research has focused on other large-brained avian taxa such as parrots. READ MORE

  5. 5. Behaviour and life-history responses to chick provisioning under risk of nest predation

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Sönke Eggers; Uppsala universitet.; [2002]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biology; Chick provisioning; clutch size; delayed dispersal; nest concealment; nest predation; parental care; population decline; Perisoreus infaustus; Siberian jay; Biologi; NATURAL SCIENCES Biology; NATURVETENSKAP Biologi; populationsbiologi; Population Biology;

    Abstract : This thesis examines risk management in breeding Siberian jays (Perisoreus infaustus), which is indigenous to the northern taiga. Parent behaviour and the nest are cryptic. A new nest is built each year. It is placed on spruce or pine branches close to the trunk and well insulated with lichens, feathers and reindeer hair. READ MORE