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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Insectes sociaux 33 (1986), S. 306-337 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Das Phänomen der Ortstreue von Ameisen derFormica rufa Gruppe wurde analysiert im Hinblick auf die zugrundeliegenden Orientierungsreize und die Erinnerung über Perioden der Isolation und der Winterruhe. Farbmarkierte Arbeiter zeigten eine gewisse Ortstreue zu verschiedenen Teilen eines Hügelnestes, doch war das Phänomen zu schwach, um die Erhaltung der Ortstreue außerhalb des Nestes zu erklären, die in freier Natur gemessen wurde. Dasselbe gilt für kinästhetische und andere Reize, die auf der Architektur innerhalb des Nestes beruhen. Es wird gezeigt, daß Ortstreue außerhalb des Nestes auf extrem langlebiger individueller Erinnerung räumlich organisierter visueller Reize beruht. Das Engramm wird über mehrere Monate der Winterruhe bewahrt. Es kann auf indirektem Wege als Repräsentation eines Landmarken/Baumkronen-Musters identifiziert werden. In großen Freiluftarenen angestellte Versuche zeigen jedoch, daß olfaktorische Reize, die wahrscheinlich mit Duftmarkierungen des Aktionsrammes identisch sind, eine Ursache für idiosynkratische Ortstreue während der Dunkelperiode darstellen. Diese Orientierungsreize, die im allgemeinen in Gegenwart visueller Reize ausgeschaltet sind, mögen ebenfalls im Gedächtnis gespeichert werden, doch konnte ihre Erhaltung über die Winterruhe hinweg nicht bestätigt werden. Die Möglichkeit, daß die Ameisen geomagnetische Reize verwenden könnten, wurde geprüft, doch mit negativem Resultat. Die ökologischen Implikationen der Befunde werden diskutiert.
    Notes: Summary Route fidelity and site allegiance (Ortstreue) ofFormica rufa group ants are analysed with repect to orienting cues and preservation through periods of isolation or winter dormancy. Colour-marked workers showed certain site allegiance to different parts of a moundnest, but the phenomenon was too weak to explain the retention of extranidal Ortstreue measurad in nature. The same applies to kinesthetic and other cues based on intranest architecture. Evidence is presented that extranidal Ortstreue is based on long-lasting individual memory of spatially organized visual cues. The engram stored through several months of winter dormancy can be indirectly identified with a representation of landmark/canopy patterns. The experiments carried out in large openair arenas show, however, that olfactory cues, probably identical with scent markings of the home range, are a cause of idiosyncratic Ortstreue during the dark period. The latter orienting cues, which in the main are switched off in the presence of visual cues, may also be stored in the memory, but preservation through winter dormancy could not be confirmed. The possibility that the ants may use geomagnetic cues was tested, but the result was negative. The ecological implications of the findings are discussed.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1420-9098
    Keywords: Attraction ; sexual pheromone ; Formica lugubris ; ant ; mating communication
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Sexuals ofFormica lugubris fly to mating places, where females attract males by using a sex pheromone. Females collected on the nest surface before departing on a mating flight are much less attractive than those collected on the mating place after the mating flight, suggesting that the mating flight triggers the release of the sex pheromone. Olfactory cues are essential for males to locate females while they patrol. Males probably use visual cues to locate females once they have alighted nearby them. Males are also attracted by aggregations of other males on the ground, probably because one or several females are likely to be close to male aggregations.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 4
    Publication Date: 1993-01-01
    Print ISSN: 0028-1042
    Electronic ISSN: 1432-1904
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Published by Springer
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