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Université de Fribourg

An early suitability assessment of two exotic Ophraella species (Coleoptera: Chrysomelidae) for biological control of invasive ragweed in Europe

E.Lommen, Suzanne T. ; Jolidon, Emilien F. ; Sun, Yan ; Eduardo, José I. Bustamante ; Müller-Schärer, Heinz

In: European Journal of Entomology, 2017, vol. 114, no. 1, p. 160–169

Classical biological control is an important means of managing the increasing threat of invasive plants. It constitutes the introduction of natural enemies from the native range of the target plant into the invaded area. This method may be the only cost-effective solution to control the rapidly expanding common ragweed, Ambrosia artemisiifolia, in non-crop habitats in Europe. Therefore,...

Université de Fribourg

Positive frequency-dependent selection on warning color in alpine leaf beetles

Borer, Matthias ; Noort, Tom Van ; Rahier, Martine ; Naisbit, Russell E.

In: Evolution, 2010, vol. 64, no. 12, p. 3629–3633

Müller's theory of warning color and mimicry, despite forming a textbook example of frequency-dependent selection, has rarely been demonstrated in the wild. This may be largely due to the practical and statistical difficulties of measuring natural selection on mobile prey species. Here we demonstrate that this selection acts in alpine beetle communities by using tethered beetles exposed to...