Sökning: "Bivoltine"

Hittade 2 avhandlingar innehållade ordet Bivoltine.

1. 1. Life history evolution in a bivoltine butterfly

   Författare :Helena Larsdotter Mellström; Christer Wiklund; Klaus Fischer; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bivoltine; Diapause; Lepidoptera; Life history; Mating system; Pheromone; Polyphenism; Population density; Sexual selection; Sperm competition; zoologisk ekologi; Animal Ecology;

   Sammanfattning : Evolution is not always straight-forward, as selection pressures may differ between different generations of the same species. This thesis focuses on the evolution of life history of the model species, the Green-veined White butterfly Pieris napi. In central Sweden P. napi has two generations per year. LÄS MER

3. 2. Latitudinal patterns in butterfly life history and host plant choice

   Författare :Georg Nygren; Sören Nylin; Mark Scriber; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; Biologi;

   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