Search for dissertations about: "beetles"

Showing result 1 - 5 of 77 swedish dissertations containing the word beetles.

2. 1. Cryptic Female Choice and Male Mating Behaviour : Sexual Interactions in Beetles

   Author : Martin Edvardsson; Göran Arnqvist; Paul Ward; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biology; Cryptic female choice; Copulatory courtship; Harmful male traits; Nuptial gifts; Sperm competition; Sexual selection; Tribolium castaneum; Callosobruchus maculatus; Biologi; Biology; Biologi;

   Abstract : The importance of cryptic female choice, i.e. female post-copulatory influence over male reproductive success, in driving the evolution of male traits remains controversial. The main aim of this thesis was to understand the post-copulatory consequences of sexual interactions and the importance of cryptic female choice in two species of beetle. READ MORE

4. 2. Baltic shore-lands facing climate change

   Author : Alma Strandmark; Sara Cousins; Martin Entling; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Arthropod diversity; Baltic shores; Beetles; Climate change; Energy flows; Marine inflow; Sea level rise; Shore ecosystems; Species distribution; Spiders; Plant Ecology; växtekologi;

   Abstract : This thesis provides new insight concerning drivers behind differences in arthropod diversity and abundance in Baltic shore ecosystems and how the arthropod communities might be affected when the conditions in the Baltic Sea are altered due to climate change.  The focus has been on climate related changes that are unique for coastal ecosystems, especially sea level rise and changes in the inflow of marine nutrients. READ MORE

5. 3. The development and implementation of software for palaeoenvironmental and palaeoclimatological research : the Bugs Coleopteran Ecology Package (BugsCEP)

   Author : Philip Buckland; Roger Engelmark; Geoffrey Lemdahl; Paul Sinclair; Umeå universitet; []
   Keywords : HUMANIORA; HUMANITIES; Quaternary geology; environmental archaeology; quaternary science; Coleoptera; beetles; database; environmental reconstructions; climate reconstructions; software; Mutual Climatic Range; MCR; palaeoentomology; Kvartärgeologi; Archaeology; Arkeologi; Archaeology; arkeologi;

   Abstract : This thesis documents the development and application of a unique database orientated software package, BugsCEP, for environmental and climatic reconstruction from fossil beetle (Coleoptera) assemblages. The software tools are described, and the incorporated statistical methods discussed and evaluated with respect to both published modern and fossil data, as well as the author’s own investigations. READ MORE

6. 4. Biodiversity & Biofuel. Harvest of Logging Residue Affects Arthropods

   Author : Karolina Nittérus; Göteborgs universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; biodiversity; beetles; biofuel; Carabidae; Cerambycidae; Celeoptera; forestry; habitat; structure; logging residue; Lycosidae; microhabitat choice; slash; species compositin; species richness; spiders; structural comlexity; whole-tree harvest;

   Abstract : .... READ MORE

7. 5. Evolution of the Biodiversity Hotspot of Madagascar from the Eye of Diving Beetles : Phylogeny, colonization and speciation

   Author : Rasa Bukontaite; Johannes Bergsten; Ingi Agnarsson; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Dytiscidae; diving beetles; Biogeography; Phylogeny; Dating; phylogenetic informativeness; colonization; speciation; microendemism; Madagascar; systematisk zoologi; Systematic Zoology;

   Abstract : Dytiscidae, contains numerous endemic and non-endemic species on Madagascar. Their evolutionary history is largely unknown on the island. Herein, I use analyses to infer phylogenetic relationship among groups of diving beetles, with a focus on the subfamily Dytiscinae and endemic species in two other groups of Dytiscidae. READ MORE