Weber, Sonja et al. (2006): Untersuchungen zur Fichtenlachniden - Waldameisen - Trophobiose

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Weber, Sonja et al. (2006): Untersuchungen zur Fichtenlachniden - Waldameisen - Trophobiose

Veröffentlicht: Montag, 22. Juni 2015 23:35 | Geschrieben von Super User | Drucken | E-Mail | Zugriffe: 4359

Weber, Sonja et al. (2006): Untersuchungen zur Fichtenlachniden - Waldameisen - Trophobiose

Sonja Weber, Axel Gruppe & Reinhard Schopf

Abstract:
Studies on the mutualism of spruce bark-sucking lachnids and red wood ants During April to October 2004 the prefered sucking-sites and seasonal abundances (number of aphid colonies, number of individuals per aphid colony) of two spruce bark-sucking aphid species (Cinaraspec.) were investigated. The intensity of ant attendance by the red wood ant Formica polyctena FÖRSTER also was registrated in at least one day of a month-decade (expressed as the quotient of the number of ants visiting an aphid colony and the number of aphids per colony). The presence of ant workers had a strong effect on the fitness of the obligatly myrmecophilous species Cinara piceicola (CHOLODKOVSKY) – measured by the sum of aphid colonies in a month-decade and by the mean of the survival time in days within the weeks of ant exclusion. With exception of the second decade of May and June, where the mean number of aphids per colony differs significantly between the two myrmecophilous Cinara species, no difference could be found in ant attendance.

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Kategorie: Forschungsinformationen / Honigtauerzeuger

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