Thermal melanism at two-spot ladybirds
January 1991 - July 1991
The two-spot ladybirds beetles (Adalia bipunctata) is a highly polymorphic
species. Two distinct groups can be distinguished.
Melanic morphs are basically black with two to four red spots while non-melanic
red morphs have mostly two black spots. The morphs have different distribution
patterns. These distribution patterns correlate with levels of sunshine. The
aim of the research was to develop a experimental setup for investigate this
relation between the color of the ladybird and the effect of sunlight intensity
and air temperature on the activity of the animals.
The experimental setup was used in a successive research, and those results are
Institute for Evolutionary and Ecological Sciences
Jong, PW de, Gussekloo, SWS
(1996) Differences in thermal balance, body temperature and activity between
non-melanic and melanic two-spot ladybird beetles (Adalia bipunctata) under controlled conditions.
Journal of Experimental Biology 199: 2655-2666.
Supervisiors: Peter W. de Jong and and
Paul M. Brakefield