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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of insect behavior 12 (1999), S. 687-690 
    ISSN: 1572-8889
    Keywords: Calliphora vicina ; blowflies ; forensic entomology ; oviposition ; activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 2
    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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  • 3
    ISSN: 1420-9098
    Keywords: Ants ; polygyny ; polydomy ; sibling species
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The speciesFormica aquilonia andF. lugubris of the mound-building red wood ants have a disjunct boreoalpine distribution in Europe. The populations ofF. aquilonia in Finland, Switzerland and the British Isles show little genetic differentiation, whereas the populations ofF. lugubris show considerable differentiation. The Central European populations morphologically identified asF. lugubris can be genetically divided into two groups (here called types A and B). Type B is found in the Alps and the Jura mountains, and is genetically inseparable fromF. aquilonia. Type A lives sympatrically with type B in the Jura mountains and is also found in the British Isles. Sympatry of the two types in the Jura shows that these are separate species. It remains open whether type B is morphologically atypicalF. aquilonia or whether it is a separate species, perhaps with a past history of introgression betweenF. aquilonia andF. lugubris. The gene frequencies in the Finnish populations ofF. lugubris differ from those of both types A and B. Genetic differences withinF. lugubris indicate that the populations have evolved separately for a long time. The social structure ofF. lugubris colonies also shows geographic variation. The nests in Finland and the British Isles seem to be mainly monogynous and monodomous, whereas the nests in Central Europe are polygynous and form polydomous colonies.F. aquilonia has polygynous and polydomous colonies in all populations studied.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Insectes sociaux 27 (1980), S. 226-236 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary Formica lugubris appears as a highly polycalic species in the Swiss Jura and creates super-colonies. The super-colony studied possesses about 1200 nests on about 70 hectares. The detailed study of 12 hectares allows the discrimination of 4 types of nests:the main nests, the secondary nests, the seasonal nests andthe starting nests, as well as 3 types of ant tracks:the constant connection routes visible on the soil, thenon-constant connection tracks not marked on the soil andthe constant foraging routes marked on the soil. The author presents the phenology ofF. lugubris who is strongly influenced by the climate of the region with a mean activity period of about 150 days. On the other hand, the first results about diet (analysis of the preys collected by the ants) differ considerably from the wellknown data for the others species of the rufa group, especially by the high number of aphids, which may be inferred the notion of a regulation of aphids population by the ants. Finally the author approaches the problem of the low density of avifauna in relation to the ants. It seems that climate and food resources lead the ants toa new ecological strategy which would express itself by the creation of super-colonies.
    Notes: Resume Formica lugubris apparaît comme une espèce hautement polycalique dans le Jura suisse et forme des super-colonies. La super-colonie étudiée comprend environ 1200 nids répartis sur 70 hectares. L'étude détaillée de 12 hectares permet de définir 4 types de nids:les nids principaux, secondaires, saisonniers etcommençants, ainsi que trois sortes de voies de communication:les routes de liaisons permanentes visibles sur le terrain, les pistes de liaisons non-permanentes non marquées sur le terrain etles chemins d'approvisionnement permanents marqués dans le terrain. L'auteur présente la phénologie deF. lugubris qui est fortement influencée par le climat de cette région avec une période moyenne d'activité de 150 jours. D'autre part, les premières données sur le régime alimentaire (analyse des proies récoltées par les fourmis) diffèrent considérablement des données connues pour les autres espèces du groupe rufa, notamment par le nombre élevé de pucerons, d'où l'idée d'une régulation des populations de pucerons par les fourmis. Enfin l'auteur aborde le problème de la faible densité de l'avifaune en relation avec les fourmis. Il semble que le climat et les ressources alimentaires conduisent les fourmis àune nouvelle stratégie écologique qui s'exprimerait par la création de super-colonies.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Insectes sociaux 30 (1983), S. 443-454 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Resume Lorsque des reines vierges de la fourmi de feu sont soustraites à l'influence de la phéromone inhibitrice produite par la reine, elles perdent leurs ailes plus facilement en présence d'ouvrières qu'en leur absence. Lorsqu'elles sont isolées pendant 72 heures après la levée de l'inhibition, un nombre significativement plus grand de reines vierges ayant hiverné perdent leurs ailes, par rapport aux reines vierges élevées au printemps. Toutefois, les nombres d'individus perdant leurs ailes en présence d'ouvrières sont similaires. Après désinhibition, quelques reines vierges immatures perdent leurs ailes. Les sexués vierges désailés sont capables de prévenir la perte des ailes chez d'autres sexués vierges. Les divers facteurs influençant la déalation chez les reines vierges ont été utilisés afin de développer un essai biologique pour la phéromone inhibitrice produite par la reine deS. invicta.
    Notes: Summary Virgin queens of the fire ant,Solenopsis invicta Buren, that were removed from the influence of the inhibitory queen pheromone, dealated more readily in the presence of workers than in their absence. During 72 hours after disinhibition, a significantly greater number of overwintered virgin queens than spring-reared virgin queens dealated when they were isolated, but the numbers that dealated in the presence of workers were very similar. Some sexually immature virgin queens dealated after disinhibition. Virgin dealates were found to be capable of preventing other virgin queens from dealating. The various factors that influence dealation by virgin queens were used to develop a bioassay for the inhibitory queen pheromone ofS. invicta.
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  • 6
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Resume Nous présentons la recette d'une nourriture artificielle élaborée pour élever des fourmis en laboratoire. Cette nourriture ne se dessèche pas et s'est avérée adéquate pour l'élevage de plusieur espèces telles queIridomyrmex humilis, Monomorium pharaonis etWasmannia auropunctata. Des sexués mâles et femelles ont été régulièrement produits dans ces sociétés.
    Notes: Summary A diet which does not desiccate was developed for rearing various ant species. this diet was found to be very attractive forIridomyrmex humilis. Monomorium pharaonis andWasmannia auropunctata in which species it permitted the rearing of colonies for long periods and the regular production of sexuals.
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  • 7
    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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  • 8
    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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