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A behavioural analysis of phase change in the desert locust
A programme of research into phase change in the desert locust, Schistocerca gregaria, is described. The ability to change phase between solitarious and gregarious forms in response to populationExpand
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Gregarious behavior in desert locusts is evoked by touching their back legs
Desert locusts in the solitarious phase were repeatedly touched on various body regions to identify the site of mechanosensory input that elicits the transition to gregarious phase behavior. TheExpand
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Dietary mixing in three generalist herbivores: nutrient complementation or toxin dilution?
Abstract We reared larvae of three generalist insect species on plants occurring in their habitats. Individuals of each species were kept either on mixed diets, or on each plant species separately.Expand
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High resolution 1H NMR spectroscopic studies of the composition of the haemolymph of crowd- and solitary-reared nymphs of the desert locust, Schistocerca gregaria.
High resolution 1H NMR spectroscopy provided a rapid and non-invasive means of establishing a multicomponent profile of the low molecular weight organic metabolites present in the haemolymph ofExpand
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Sesquiterpenes from the Senecioneae and their effect on food choice of the specialised leaf beetles Oreina cacaliae, Oreina speciosissima and the generalist snail Arianta arbustorum
The occurrence of sesquiterpenes of the furanoere-mophilane type (hereafter STs) in plants of the tribe Senecioneae (Asteraceae) has been known since the sixties (see Seaman, 1982 and referencesExpand
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Genetic and environmental-based variability in secondary metabolite leaf content of Adenostyles alliariae and A. alpina (Asteraceae) : a test of the resource availability hypothesis
To test the resource availability hypothesis we compared the leaf content in carbon-and nitrogen-based allelochemicals between heavily and lightly shaded plants of Adenostyles alliariae and A. alpinaExpand
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Long-Term Effects on Food Choice of Land Snail Arianta arbustorum Mediated by Petasin and Furanopetasin, Two Sesquiterpenes from Petasites hybridus
Sesquiterpenes (STs) from the Senecioneae have been found to be potent snail repellents. We investigated the range of activity of the STs petasin, isopetasin, furanopetasin, kablicin, and cacalol,Expand
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Effects of crowding, isolation, and transfer from isolation to crowding on total ecdysteroid content of eggs in Schistocerca gregaria.
We examined the ecdysteroid content of eggs from crowd-reared and solitary-reared desert locusts, Schistocerca gregaria, throughout embryogenesis from the day of egg laying until shortly beforeExpand
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Determinants of seasonal feeding of the generalist snail Arianta arbustorum at six sites dominated by Senecioneae
We investigated the diet constituents of Arianta arbustorum by means of faecal analysis and regressed their quantity on the availability and quality of food plants. We studied six sites, allExpand
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Leiterplatte, insbesondere für ein leistungselektronikmodul, umfassend ein elektrisch leitfähiges substrat
Leiterplatte (1a, 1 b, 1c), insbesondere fur ein Leistungselekironikmodul (2), umfassend ein elektrisch leitfahiges Substrat (3), wobei das Substrat (3) zumindest teilweise, vorzugsweise vollstandig,Expand