Search for dissertations about: "Body size evolution"

Showing result 1 - 5 of 29 swedish dissertations containing the words Body size evolution.

  1. 1. Body Size Evolution in Butterflies

    University dissertation from Stockholm : Zoologiska institutionen

    Author : David Berger; Stockholms universitet.; [2008]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Body size evolution; age- and size at maturity; life history theory; fecundity; predation risk; juvenile growth rate; Lepidoptera; NATURAL SCIENCES Biology; NATURVETENSKAP Biologi; zoologisk ekologi; Animal Ecology;

    Abstract : Life history research deals with the scheme of resource partitioning to a wide spectra of processes and the trade-offs shaping these events. One of the most fundamental life history trade-offs is the one of at which age- and size an organism should start to reproduce; reaching a large size at maturity is often advantageous in terms of high adult survival and reproductive potential, while to attain a larger size the organisms must prolong juvenile development which is assumed costly in terms of mortality. READ MORE

  2. 2. Micro- and macroevolutionary aspects of body size diversification and thermal adaptation in insects

    University dissertation from Lund University, Faculty of Science, Department of Biology

    Author : John Waller; Lunds universitet.; Lund University.; [2017-12]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Evolution; body size; Insects; dragonflies; damselflies; Odonata; Comparative methods; fossils;

    Abstract : För varje typ av djur finns en optimal storlek, men större är ofta bättre. För 300 miljoner år sedan var jättelika drakeflugor de största insekterna någonsin. Högre atmosfäriska syrekoncentrationer tros ha tillåtit dem att både flyga och utvecklas till jättar. READ MORE

  3. 3. Why and how brain size evolves Sociality, predation and allometry

    University dissertation from Stockholm : Department of Zoology, Stockholm University

    Author : Wouter van der Bijl; Stockholms universitet.; [2018]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; brain size; brain size evolution; encephalization; predation; predator inspection; sociality; animal contest; constraint; etologi; Ethology;

    Abstract : The evolution of the vertebrate brain has remained a topic of intense interest from biologists over many decades. Evolutionary biologists have seen it as an intriguing example of how the size and structure of a trait evolves across large phylogenies and under body size constraints, with both large shifts in deep evolutionary time and continuous smaller scale adaptation. READ MORE

  4. 4. Thinking in water Brain size evolution in Cichlidae and Syngnathidae

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Masahito Tsuboi; Uppsala universitet.; [2015]
    Keywords : 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;

    Abstract : 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. READ MORE

  5. 5. Aspects of locomotor evolution in the Carnivora (Mammalia)

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Ki Andersson; Uppsala universitet.; [2003]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Morphology; Mammalia; Carnivora; Locomotion; Cranial; Elbow joint; Morphology; Morphometrics; Landmarks; Multivariate statistics; Allometry; Ecomorphology; Dental; Body size; Morfologi; MEDICINE Morphology; cell biology; pathology; MEDICIN Morfologi; cellbiologi; patologi;

    Abstract : In this thesis, the shape of the distal humerus trochlea is analysed using landmark-based morphometrics and multivariate methods, with the aim of exploring locomotor evolution in carnivorans. Elbow joint morphology is used together with body size and craniodental morphology to characterize past and present carnivorans. READ MORE