Search for dissertations about: "ants"

Showing result 6 - 10 of 27 swedish dissertations containing the word ants.

  2. 6. From Ants to Service Robots : an Exploration in Stigmergy-Based Navigation Algorithms

    Author : Ali Abdul Khaliq; Alessandro Saffiotti; Federico Pecora; Andrea Omicini; Örebro universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Stigmergy; Minimalistic Robots; Mobile robot navigation; RFID technology; Multi-robot system; Path planning; Localization; Map building;

    Abstract : Navigation is a core functionality of mobile robots. To navigate autonomously, a mobile robot typically relies on internal maps, self-localization, and path planning. Reliable navigation usually comes at the cost of expensive sensors and often requires significant computational overhead. READ MORE

  4. 7. Effects of Social Organisation on Spatial Genetic Structures in Formica Ants

    Author : Niclas Gyllenstrand; Michael Bruford; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biology; Formica ants; microsatellites; monogyny; mtDNA; polygyny; social insects; Biologi; Biology; Biologi; naturvårdsbiologi; Conservation Biology;

    Abstract : The social organization of social insect colonies can be broadly defined as monogynous, single reproductive female or polygynous, several reproductive females. Monogynous organization is genetically simple while polygynous is more complex and the two social forms differ commonly in mating and dispersal behaviour as well as in colony foundation. READ MORE

  5. 8. Adaptive significance of queen mating frequency in ants : In search of benefits of genetic variability

    Author : Pia J. Gertsch; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; Genetics; genetik;

    Abstract : Fitness effects of polyandry, multiple mating by females, were studied on two ant speciesLasius niger and Formica truncorum. Particular emphasis was put on evaluating diploid male load, which happens when homozygosity in the sex determination locus leads to intendedfemales developing into sterile, diploid males. READ MORE

  6. 9. Interactions between ants and pine weevils : effects on forest regeneration

    Author : Vita Manak; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Ants interact with plants in various ways and ant presence on plants can decrease local abundance or activity of herbivores, which in turn increases plant fitness. Red wood ants (Formica rufa group) are common species in forests of northern Europe. READ MORE

  7. 10. Behaviour of Lycaenid butterfly larvae in their mutualistic interactions with ants

    Author : Annkristin H. Axén; Judith L. Bronstein; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fjärilar; myror; djurekologi; etologi; Ethology;

    Abstract : Interspecific mutualism often involves partners trading different kinds of services. The cost and benefits of the trade may differ from one interaction to the next, or fluctuate over time in a single interaction, due to factors both internal and external to the mutualism itself. READ MORE