title: Complete elimination of hostplant quinolizidine alkaloids by larvae of a polyphagous lycaenid butterfly, Callophrys rubi.
abstract: Caterpillars of the lycaenid butterfly Callophrys rubi accept a variety of hostplants. When fed inflorescences or leaves of Genista tinctoria (a natural hostplant) or Lupinus polyphyllus (a non-host), the larvae completely eliminate quinolizidine alkaloids ingested from their food in their frass. No alkaloids are stored. Infestation by the parasitoid wasp Distatrix sancus (Braconidae) did not affect alkaloid elimination. The presence of an effective anti-toxin system is discussed with reference to the evolution of hostplant relationships in the genus Callophrys. There is no evidence that in the secondarily myrmecoxenous larvae of C. rubi hostplantderived chemical defense takes the place of former myrmecophily.
authors.affiliation: Theodor-Boveri-Zentrum für Biowissenschaften, Lehrstuhl für Verhaltensphysiologie und Soziobiologie, Am Hubland, W-8700, Würzburg, Germany.
authors.forename: Konrad
authors.initials: K
authors.lastname: Fiedler
authors.affiliation: Julius-von-Sachs-Institut für Biowissenschaften, Lehrstuhl für Pharmazeutische Biologie, Mittlerer Dallenbergweg 64, W-8700, Würzburg, Germany.
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Krug
authors.affiliation: Julius-von-Sachs-Institut für Biowissenschaften, Lehrstuhl für Pharmazeutische Biologie, Mittlerer Dallenbergweg 64, W-8700, Würzburg, Germany.
authors.forename: Peter
authors.initials: P
authors.lastname: Proksch
keywords: Caterpillars; Herbivory; Hostplant alkaloids; Myrmecoxeny; Parasitoids