Sökning: "Birgitta Tullberg"
Hittade 3 avhandlingar innehållade orden Birgitta Tullberg.
1. Behavioural ecology and population dynamics of an aposematic seed bug, Lygaeus equestris L. (Heteroptera, Lygaeidae)
Sammanfattning : .... LÄS MER
2. Seasonal change in defensive coloration in a shieldbug
Sammanfattning : Protective coloration such as aposematism and crypsis occurs in many insects but only a few species alter their defensive strategy during the same instar. We hypothesize the adult shield bug Graphosoma lineatum with an alternating black and non-melanised longitudinal striation exhibit such a change in defensive coloration. LÄS MER
3. Causes and consequences of niche differentiation between color morphs of pygmy grasshoppers
Sammanfattning : In this thesis, I used the color polymorphic pygmy grasshopper, Tetrix subulata, as a model system in order to investigate the degree of niche differentiation between alternative color morphs that are present within a single population. First, I hypothesized that individuals belonging to different color morphs differ in their innate food preference due to somewhat dissimilar physiology, and in their actual food consumption due in part to differential habitat use. LÄS MER