Sökning: "Butterfly"
Visar resultat 16 - 20 av 88 avhandlingar innehållade ordet Butterfly.
16. Geographic variation in life cycles : Local adaptation and ecological genetics in a temperate butterfly
Sammanfattning : Conditions in nature change with the seasons, necessitating seasonal adaptations that synchronize the life cycles of organisms with their surroundings. Such regulatory adaptations must vary between populations to track local variation in climate and seasonality; this local adaptation is facilitated by locally specific seasonal cues, but may be hampered by gene flow and genetic history. LÄS MER
17. Evolutionary history of the butterfly subfamily Satyrinae (Lepidoptera: Nymphalidae)
Sammanfattning : I present an overview of the evolutionary history of Satyrinae butterflies (Lepidoptera: Nymphalidae). By using Bayesian and cladistic methods, I develop a phylogenetic hypothesis as a basis for studying the evolutionary history of the group. LÄS MER
18. Latitudinal patterns in butterfly life history and host plant choice
Sammanfattning : The central subject in this thesis is adaptation of insect populations to different environments along latitudinal gradients. When latitude decreases, the longer favorable season causes an increase in time available for development. However, predictions are complicated by shifts in voltinism. LÄS MER
19. Life history evolution during a climate-driven butterfly range expansion
Sammanfattning : Climate change pushes species polewards and upwards – as temperatures rise, species move to areas that were previously too cold for them. During range expansions, species encounter unfamiliar environmental conditions, which may require evolutionary adaptation, but expanding populations may often be hampered by their genetic and demographic properties. LÄS MER
20. Analysis of waveguide slot antennas with baffles
Sammanfattning : .... LÄS MER
