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  • Springer  (717,505)
  • American Meteorological Society
  • 1995-1999  (346,410)
  • 1990-1994  (320,342)
  • 1955-1959  (64,680)
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  • 1
    Publication Date: 2020-02-12
    Keywords: 550 - Earth sciences
    Type: info:eu-repo/semantics/book
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  • 2
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    Insectes sociaux 2 (1955), S. 35-43 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
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  • 3
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    Insectes sociaux 2 (1955), S. 63-68 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary Just as Asia anterior has its own species of Hodotermites, there are also two own species ofMicrocerotermes, well distinguishable from each other. The new species described in this paper,M. gabrielis n. sp., is near toM. eugnathus of North-Africa. The fauna of the termites of the interior of Asia anterior has probably no common species with the mediterranean countries consequently.
    Abstract: Résumé De même que certaines espèces d'Hodotermites sont propres à l'Asie Antérieure, on trouve aussi dans cette région deux espèces deMicrocerotermes, faciles à distinguer l'une de l'autre. La nouvelle espèce, décrite ici,M. gabrielis n. sp., est très proche duM. eugnathus que l'on trouve en Afrique du Nord. Les Termites de l'intérieur de l'Asie antérieure ne semblent donc pas avoir d'espèces communes avec les pays méditerranéens.
    Notes: Zusammenfassung Wie Vorderasien seine eigenen Hodotermiten-Arten hat, so verfügt es auch über zwei eigneMicrocerotermes Arten, die von einander gut zu unterscheiden sind. Die neue, hier beschriebene Art,M. gabrielis n. sp., steht dem in Nordafrika vorkommendenM. eugnathus sehr nahe. Die Termitenfauna des inneren Vorderasiens hat also anscheinend keine gemeinsamen Formen mit den Mittelmeerländern.
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  • 4
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    Insectes sociaux 2 (1955), S. 69-79 
    ISSN: 1420-9098
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  • 5
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    Insectes sociaux 2 (1955), S. 115-126 
    ISSN: 1420-9098
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  • 6
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    Insectes sociaux 2 (1955), S. 147-162 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Ce rapport décrit des expériences de ligatures pratiquées chez la larve et la nymphe d'abeille. Les conclusions suivantes nous semblent justifiées: 1. Chez l'abeille, la détermination et le déroulement de la métamorphose dépendent de facteurs humoraux, de même manière que chez les autres insectes. 2. Les centres d'origine de ces facteurs sont probablement les glandes prothoraciques, les corpora allata et les groupes de cellules neuro-sécrétrices. 3. Des dérangements dans le système des 2-hormones causent la formation des types intermédiaires, particulièrement des chrysalides-imaginales précoces. 4. L'intensité de l'assimilation dépend de facteurs céphaliques.
    Abstract: Summary Ligature experiments on larvae and pupae of honeybees are described. We can conclude from the results the following: 1. Determination and performance of the metamorphosis depend — with bees in the same way as with other insects—on humoral factors. 2. The centres of origin of these factors are probably the prothoracic glands, the corpora allata, and the neurosecretory cells of the brain. 3. The imaginal differentiation depends on thoracic factors. Derangements in the 2-hormon-system lead to the formation of premature adultoids. 4. The intensity of metabolism depends on factors of the head.
    Notes: Zusammenfassung Es werden Schnürungsversuche an Larven und Puppen von Honigbienen beschrieben. Aus den Ergebnissen ist zu folgern: 1. Auslösung und Durchführung der Metamorphose sind bei der Biene in der gleichen Weise wie bei anderen Insekten von stofflichen Faktoren abhängig. 2. Bildungszentren dieser Faktoren sind wahrscheinlich Prothoraxdrüsen, Corpora allata und neurosekretorische Zellen des Gehirns. 3. Die imaginale Differenzierung ist abhängig von Faktoren des Thorax. Störungen im 2-Hormon-System führen zur Bildung proteler, pupal-imaginaler Zwischenformen. 4. Die Stoffwechselintensität ist abhängig von Faktoren des Kopfes.
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  • 7
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    Insectes sociaux 2 (1955), S. 187-194 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The honeybee has prospered through the years of recorded history by following a plan of life that contributes to the survival of the colony rather than to the individual. The colony is capable of air-conditioning its hive to meet changing weather and to store up food sources for adverse periods. Since it contributes to the production of fruits, seeds, vegetables and pasture crops, and produces honey, a delectable natural sweet, man has been interested in its production and care. The honeybee is subject to many diseases which affect both the adults and the developing young. Several of the diseases have caused the death or destruction of thousands of colonies annually. Fortunately, none of these diseases are transmitted to other animals. Through the natural laws of survival, certain strains of bees have developed resistance to some of the diseases and man has assisted in this by selective breeding and cultivation of the hardier strains. The most noteworthy contribution to the control of bee diseases has been the use of sulfathiazole, terramycin and other therapeutics in the food of bees in the spring and fall. By their use, at least one disease which had been considered as incurable for centuries can be prevented or controlled without the destruction of colonies or valuable equipment. The use of chemicals and antibiotics as therapeutic agents in disease control has measurably strengthened the position of the honeybee in our general economy and will save the beekeeping industry many thousands of dollars annually.
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  • 8
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    Insectes sociaux 2 (1955), S. 213-220 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary Among the breedings carried out on the Ivory Coast, we could describe the first stages of development in colonies ofB. natalensis especially, by observing their nest-building, the growth of the fungus bed and of the heaps of saw-dust. The imaginal founder couple dig an underground cavity (copularium) in which they tend the first brood without taking any food themselves. Then, the first small workers dig ascending passage-ways through which they go in order to eat into the wood on the surface of the ground in the shelter of covered passage-ways. The first big workers come out soon after. In one night, inside the copularium the workers construct an even egg-shaped dwelling-place; the first fungus bed, at once fertile, is erected inside this dwelling-place; the heaps of saw-dust used as food-reserves are laid outside. Homologies are drawn between the structures and cavities of a young nest and those of an adult termitarium.
    Notes: Résumé D'après des élevages faits en Côte d'Ivoire, on décrit les premières étapes du développement pour les colonies deB. natalensis, en examinant particulièrement la construction du nid, la formation de la meule à champignon et des amas de sciure de bois. Le couple imaginal fondateur creuse une cavité souterraine (copularium) où il élève, sans prendre aucune nourriture, la première couvée. Les premiers petits ouvriers creusent alors des galeries ascendantes par où ils vont attaquer le bois à la surface du sol, à l'abri de galeries couvertes. Les premiers grands ouvriers apparaissent peu après. En une seule nuit, les ouvriers construisent, à l'intérieur du copularium, un habitacle régulier de forme ovoïde; la première meule à champignons, d'emblée fertile, est édifiée à l'intérieur de cet habitacle; la sciure de bois, réserve alimentaire, est amassée à l'extérieur. Les homologies sont établies entre les structures et cavités du jeune nid et celles de la termitière adulte.
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  • 9
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    Insectes sociaux 2 (1955), S. 261-263 
    ISSN: 1420-9098
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  • 10
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    Insectes sociaux 2 (1955), S. 313-321 
    ISSN: 1420-9098
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    Insectes sociaux 2 (1955), S. 303-311 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary 1. The size of the foraging populations of bumblebee colonies remained fairly constant throughout the day with a peak between 10.00 hrs. and 11.00 hrs. There was a tendency for the proportion of pollen loads to nectar loads collected to increase during the day. About 15% of the foragers of bumblebee colonies spent the night away from their nests. 2. There was a large variation in the number of trips per day made by bumblebee foragers. Foragers which collected pollen spent longer per trip than those which collected nectar only, and spent longer inside their nests between trips.B. lucorum foragers made fewer trips per day and spent more time on each trip than did the other species studied (B. agrorum, B. pratorum andB. sylvarum). 3. The rate at which bumblebees drank sugar syrup depended on the concentration of the syrup and the size of the bee. Larger bumblebees ingested larger volumes than smaller bumblebees, although the latter collected larger loads in proportion to their body size. Individuals varied greatly in the size of pollen loads that they collected.
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    Insectes sociaux 2 (1955), S. 358-358 
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  • 13
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    Insectes sociaux 2 (1955), S. 355-357 
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    Insectes sociaux 3 (1956), S. 71-74 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung In Zuchtgruppen mit Arbeitern wurde die Längenzunahme der Larven abgeschätzt und auf die Arbeiterzahl bezogen. Dabei zeigt sich, daß der individuelle Wirkungsgrad (des Arbeiters) in dem Maße abnimmt, wie die Gesamtgruppenleistung zunimmt. Dafür wurden 3 Gründe gefunden: 1. Ein Ausbleiben der Verteilung der Larven in großen Gruppen unter den Arbeitern mit dem Ergebnis einer zunehmenden Dichte der die Larven pflegenden Arbeiter. Dies bewirkt sogar Reihen mit konstantem Arbeiter/Larven-Koeffizienten und variierender Larvengröße. 2. Ein rel. Mangel von Gewichtigkeit der kleineren Larven für die Arbeiter (als Auslöser für den Fütterungsakt), welche bedeutet, daß die Pflege unter der maximalen Leistungsfähigkeit der Arbeiter bleibt. 3. Das “Testsystem” der Fütterung (ausgenommen bei Erschöpfung), welches dazu führt, daß die Arbeiter Zeit- und Arbeitsaufwand verlieren, um die Larven zu finden, die bereit sind Futter aufzunehmen.
    Notes: Résumé Dans des groupes d'élevage d'ouvriers, on a évalué l'augmentation de la longueur des larves; celle-ci a été mise en relation avec le nombre des ouvriers. Il résulte de cette étude que l'efficience individuelle de l'ouvrier diminue dans la mesure où la production de l'ensemble augmente. Trois raisons ont été fournies: 1o Dans les groupes importants, les larves ne sont pas réparties entre les ouvriers; il en résulte une augmentation de la densité des ouvriers s'occupant des larves. Cella amène même des séries avec ratios permanents d'ouvriers/larves et des larves de taille différente. 2o Les larves plus petites manquent relativement de valeur pour les ouvriers (comme stimulant pour la quéte de la nourriture), ce qui signifie que les soins demeurent audessous des capacités maxima de l'ouvrier. 3o Le test-système de l'alimentation (les cas d'épuisement mis à part) aboutit à une perte de temps et de travail précieux pour les ouvriers qui se mettent en quête des larves prêtes à recevoir la nourriture.
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    Insectes sociaux 3 (1956), S. 129-130 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Zusammenfassung An Laboratoriumszuchten vonReticulitermes lucifugus Rossi undReticulitermes flavipes Kollar (aus den Hamburger Befallsgebieten) werden Beobachtungen zur Biologie der Ersatzgeschlechtstiere mitgeteilt. Für die Durchführung dieser Beobachtungen wurden besondere “Schaunester” eingerichtet. Folgende Punkte der beobachteten Verhaltensweisen werden hier hervorgehoben: Die Nymphen der Ersatzgeschlechtstiere sammeln sich stets in “Herden” von 80–100 Einzeltieren und werden von einer Gruppe Arbeiter (als “Hütehunde”) bewacht. Die Arbeiter halten die Nymphen auf einem engen Raum zusammen und versuchen andere Nestgenossen von den Nymphen fernzuhalten. Alle ein bis zwei Tage wechseln die “Herden” ihren Standort. Das Weiterziehen geschieht gleichfalls in Form von “Herden”. Die Ernährung der Nymphen geschieht auf stomodealem Wege durch die Arbeiter. *** DIRECT SUPPORT *** A0180089 00007
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    Insectes sociaux 3 (1956), S. 285-292 
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    Insectes sociaux 3 (1956), S. 325-334 
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    Insectes sociaux 3 (1956), S. 347-349 
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    Insectes sociaux 3 (1956), S. 361-364 
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    Insectes sociaux 3 (1956), S. 403-415 
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    Insectes sociaux 3 (1956), S. 395-401 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Résumé La production des castes, notamment des nymphes, futurs imagos ailés et des ouvriers chez leReticulitermes lucifugus est soumise à un cycle biologique annuel. L'auteur montre que dans les colonies naturelles les nymphes apparaissent quelques semaines après l'essaimage des jeunes imagos, vers la fin du printemps en une fois et en grande quantité. Elles se développent pendant l'été et arrivent en automne à l'avant-dernier ou même au dernier stade avant la mue imaginale. En hiver le développement de la colonie est normalement arrêté par le froid. Au début du printemps les nymphes se transforment en imagos et quittent la colonie. Pendant le repos hivernal les sexuées femelles accumulent beaucoup de corps gras et, au moment où les grandes nymphes se transforment en imagos, une ponte massive se produit dans le nid. Après la disparition des imagos la colonie voit son potentiel nutritif considérablement augmenté, puisqu'il n'y a plus de nymphes à nourrir. Pour cette raison les larves, à leur tour bien alimentées, peuvent se transformer en nymphes. Celles-ci, par leur croissance et leur constant besoin de nourriture, abaissent de nouveau le potentiel alimentaire. En conséquence de cette baisse, les larves qui apparaissent pendant l'été et l'automne sont mal nourries et donnent des ouvriers. Si les colonies deReticulitermes l. santonensis ont leur nid dans une maison bien chauffée en hiver, comme c'est le cas dans quelques immeubles de La Rochelle, lecycle annuel peut se transformer encycle semestriel. Les nymphes formées au printemps arrivent à l'état imaginal en automne et essaiment alors. Quand ils quittent la colonie un nouveau cycle commence qui permet un autre essaimage cinq à six mois plus tard, au printemps. L'auteur suppose que le facteur climatique et le facteur alimentaire jouent le rôle principal dans la formation des nymphes et dans le cycle biologique des Termitières.
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    Insectes sociaux 3 (1956), S. 417-422 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung iN 367 Untersuchungen gesunder Bienenvölker während der Monate September bis Ende März über eine Periode von 7 Jahren wurde die Menge anwesender Brut und Pollens in den Waben festgestellt. Die Brutmenge war am niedrigsten im Oktober mit nur 14% aller Völker, während der Durchschnitt der Pollenmenge per Volk während der Winterungszeit nur 85 gr betrug. In Stämmen mit einer Königin war die Menge des in Waben verkapselten Pollens minimal im Vergleich zu der in unverkapselten Zellen. Es wurde vorgeschlagen, daß Bienen als Resultat nat ürlicher Auslese fast ohne Eiweiß überwintern.
    Abstract: Résumé On a déterminé les quantités de couvain et de pollen dans les rayons de 367 colonies saines examinées de septembre à mars durant sept ans. Quand le couvain était présent dans 14 p. 100 des colonies avec un minimum en octobre, la quantité de pollen par colonie pendant l'hivernage avoisinait 85 grammes en moyenne. Dans les colonies possédant une reine, la quantité de pollen accumulée en alvéoles fermées était négligeable par rapport à celle accumuée en alvéoles ouvertes. L'auteur suggère que la sélection naturelle peut expliquer le fait que les abeilles puissent passer l'hiver pratiquement sans protéines.
    Notes: Summary In 367 examinations of healthy honeybee colonies during each of the months September to March inclusive, conducted over 7 years, the quantities of brood present and the quantities of pollen in the combs were determined. The brood minimum occurred in October, when brood was present in only 14% of colonies, while throughout the period of wintering the quantity of pollen per colony averaged only 3 oz. In colonies which had been queenright, quantities of pollen stored in capped cells were negligible in comparison with quantities in open cells. It is suggested that bees may have come to winter practically without protein as a result of natural selection.
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    Insectes sociaux 3 (1956), S. 431-438 
    ISSN: 1420-9098
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    Topics: Biology
    Notes: Résumé Nous avons observé depuis longtemps déjà que la FourmiCremastogaster scutellaris forme de grandes colonnes de récolte, formations stables pendant toute une saison. Dans une note précédente (1) nous avons montré qu'il est relativement facile d'étudier l'activité collective des ouvrières hors du nid en faisant varier les facteurs du milieu et en observant le comportement de ces colonnes. Il nous a été ainsi possible de déterminer l'existence d'un thermo-preferendum (situé aux environs de 25° pour cette espèce), pour lequel l'activité de la colonne est maxima. De même nous avons pu montrer que l'activité journalière de ces colonnes est arythmique et se trouve uniquement sous l'influence directe et mesurable de la température. Dans l'étude qui suit, nous avons cherché à savoir de quelle façon les facteurs externes déterminaient l'arrêt d'activité hivernal (hibernation) et la reprise d'activité printanière (rupture d'hibernation) des fourmilières deCr. scutellaris. Nous ne nous occuperons pas ici de ce qui se passe à l'intérieur de la fourmilière ni des incidences de l'hibernation sur le cycle biologique de la colonie (ceci fera l'objet de publicationsultérieures), mais simplement des phénomènes qui sont visibles à l'extérieur du nid et qui affectent les colonnes d'ouvriéres.
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    Insectes sociaux 3 (1956), S. 439-454 
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    Description / Table of Contents: Résumé Cet article décrit deux espèces nouvelles deKyidris de la Nouvelle Guinée, genre de fourmis dacétines. Elles ont été trouvées toujours en colonies mixtes avecStrumigenys loriae Emery, grande dacétine polymorphe vivant souvent sans son parasite et commune partout dans les forêts humides tropicales à basse altitude de la Nouvelle Guinée. Les relations entreKyidris etStrumigenys sont interprétées comme un stade primitif de parasitisme permanent, obligatoire et non-dulotique. De nombreuses reines des deux genres se trouvent ensemble dans le même nid, et leur couvain est complètement mélangé. Les ouvrières du parasite sont très nombreuses et, dans une des colonies étudiées, étaient presque aussi nombreuses que celles de l'hôte. Les ouvrières contribuent au travail de la colonie en recueillant de la nourriture et en soignant le couvain, mais d'une façon relativement inefficace; elles ne paraissent pas participer à la construction du nid.
    Notes: Summary Two new species of the dacetine ant genusKyidris from New Guinea are described. These were always found in mixed colonies with the larger, polymorphic dacetine speciesStrumigenys loriae Emery, which often occurs independently and is generally abundant in the lowland rain forests of New Guinea. The relationship of theKyidris to theStrumigenys is interpreted as a very primitive level of permanent, obligatory, nondulotic parasitism. Multiple queens of both genera occur together, and the brood is completely mixed. The worker population of the parasite is very large, and in one colony studied almost equaled that of the host. The parasite workers contribute to the colony labor by food-gathering and brood-handling, but are relatively inefficient in these tasks; they apparently do not participate in nest building at all.
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    Insectes sociaux 3 (1956), S. 499-504 
    ISSN: 1420-9098
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    Topics: Biology
    Notes: Résumé L'observation journalière de la ponte de la reine des abeilles permet de mettre en évidence la grande indépendance de ce phénomène par rapport aux conditions extérieures. Seule la carence alimentaire poussée assez loin paraît capable d'arrêter la ponte. Dans ce cas, l'apport de matériaux purement glucidiques provoque un nouveau départ. Mais, si on ajoute au sucre du pollen et de la gelée royale qui fournissent de l'azote et sans doute aussi d'autres substances annexes (peut-être de nature vitaminique), l'augmentation de la ponte atteint le double de celle des témoins. Il existe enfin unarrêt spontané automnal que même le renforcement de l'alimentation ne peut briser, et qui semble pouvoir être attribué à une diapause.
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    Insectes sociaux 3 (1956), S. 489-497 
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    Description / Table of Contents: Zusammenfassung Eine gründliche Revision vonHolcoponera ist sehr erschwert, einmal durch frühere mangelhafte Beschreibungen, dann durch Santschis übermässige Aufgliederung in seiner Revision von 1929, und durch die Schwierigkeit alle betreffenden Typen sehen zu können. Einige neuen Synonymen wurden festgestellt;H. striatula var.antillana Santschi ist nur eine individuelle Variante vonStriatula, und kann daher nomenclatorisch unbeachtet bleiben.H. simplex Emergy schliesst als individuelle Varianten, ohne Anspruch auf formelle Namen, die drei sogenannten Arten oder Unterarten aus Costa Rica ein (Simplex s. str., satzgeri Forel andforeli Santschi). Das Auftreten von die synonymischeH. spurium Forel in Guatemala ist zweifelhaft. Die Artrelicta Mann wurde von der GattungRhopalopone zu der GattungHolcoponera überführt. Die neue ArtH. mina verknüptH. relicta mit den andern Arten dieser Gattung. Zwei Arten sind neu beschreiben:H. mina (Bolivien und Peru) undH. acuta (Bolivien).
    Abstract: Résumé Il est difficile de faire une revision complète desHolcomponera, à cause des mauvaises descriptions publiées jusqu'ici, du morcellement excessif introduit parSantschi dans son travail de 1929 et de l'impossibilité d'examiner tous les types se rapportant au genre. Des synonymies nouvelles sont proposées pour quelques cas particulièrement litigieux.H. striatula var.antillana Santschi est traité comme une variation individuelle destriatula et le nomantillana devra donc disparaître de la nomenclature.H. simplex Emery comprendra comme variations individuelles, sans nom particulier, les trois espèces ou sous-espècessatzgeri Forel,spurium Forel etforeli Santschi, du Costa Rica, avec une seule localité douteuse du Guatémala. L'espèce décrite commeRhopalopone relicta Mann est transférée au genreHolcoponera, par suite des caractères de transition deH. mina sp. nov.-H. mina, de la Bolivie et du Pérou, etH. acuta, de la Bolivie, sont décrits comme espèces nouvelles.
    Notes: Summary InHolcoponera, thorough revisionary work is rendered difficult by the poor quality of previous descriptions, by the excessive splitting ofSantschi in his revision of 1929, and by the difficulty of seeing all of the types involved. New synonymy is offered where the need is obvious in a few cases.H. striatula var.antillana Santschi proves to be an individual variant ofstriatula and is unworthy of nomenclatorial distinction.H. simplex Emery includes, as individual variants without claim to formal names, the three nominal species or subspecies from Costa Rica (simplex s. str., satzgeri Forel andForeli Santschi). Another synonym,H. spurium Forel, occurs doubtfully in Guatemala. The speciesrelicta Mann is transferred fromRhopalopone to the genusHolcoponera because the new speciesH. mina is intergradient between it and the otherHolcoponera species. Two new species are described:H. mina, from Bolivia and Peru, andH. acuta, from Bolivia.
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    Insectes sociaux 3 (1956), S. 551-557 
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  • 28
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    Description / Table of Contents: Summary 1. Structure and behaviour of gynandromorphic honeybees were observed on about 40 individuals ofApis mellifera ligustica. 2. They showed externally various types of mosaics. In the majority, the male elements were predominant in the head, but the females in the abdomen. 3. The internal mosaics corresponded fairly well with the external ones in brain and gonads. A slight female tendency was, however, observed in the brains of certain individuals whose heads completely male-type externally. 4. When successfully introduced into other nucleus colonies, the gynandromorphic bees could maintain their normal life in that colony, with no sign of any aggressions from other workers. Various worker-behaviours were observed even in the individuals with externally completely male head. 5. Correlation between head-type and behaviour could not be determined, perhaps due mainly to the lack of a sufficient material. 6. Some assumptions were proposed concerning performance of worker-behaviours by individuals with completely male head.
    Notes: Zusammenfassung 1. Bei ungefähr 40 gynandromorphen Honigbienen (Apis mellifera ligustica) wurden ihre Struktur und ihre Handlungen beobachtet. 2. Sie zeigten äußerlich verschiedene Mosaiktypen. Meistenteils überwogen die männlichen Elemente am Kopf, die weiblichen dagegen am Hinterleib. 3. Das innere Mosaik im Gehirne und in den Keimdrüsen entsprach ziemlich dem der äußeren Charaktere. Aber bei einigen am Kopf äußerlich vollkommen männlichen Individuen wurde eine schwach weibliche Tendenz im Gehirn beobachtet. 4. Die in Kleinvölker eingeleiteten Gynandromorphen könnten, ohne durch die Volksgenossen hinausgezerrt zu werden, innerhalb der Völker ihr Leben behalten. Verschiedene Arbeiterin-Handlungen wurden sogar an äußerlich ♂-köpfigen Individuen beobachtet. 5. Korrelation zw. Kopftyp ( -♂) und Handlung könnte, vielleicht aus Materialmangel, nicht festgestellt werden. 6. In Bezug auf die Ausführung der -Handlungen durch ♂-köpfige Individuen wurden einige Annahmen gegeben.
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    Insectes sociaux 3 (1956), S. 558-560 
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    Insectes sociaux 3 (1956), S. 273-276 
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    Description / Table of Contents: Summary Two aeration mechanisms are described for nests ofMacroternes natalensis located in the Ivory Coast and in Uganda (fig. 2). In the Ivory Coast mounds the air circulates in the nest. It is heated in the fungus combs in the center of the nest (Lüscher, 1951). The warm air rises into a large cavity above the nest proper and is driven through 6–12 outward running channels through the wall into ribs which run downward on the outside of the wall. In these ribs the air is pressed downward in a number of small channels which run together at the level of the soil to form big channels connected with a large cavity (cellar) beneath the nest proper. From there the air which has been cooled in the ribs can rise into the nest again (fig. 6). In the ribs where the interior and the exterior surfaces are enlarged and where the wall is thin, dry and porous, oxygen and carbon dioxide can be exchanged with the atmosphere by diffusion. In Uganda mounds the air is also heated in the fungus combs and the warm air rises through a system of channels into cavities situated just beneath the surface in the highest parts of the mound. There it is forced by pressure to diffuse outward through the relatively thin and porous wall. The fresh air is sucked into the nest proper from the cellar, which in these mounds communicates with the surrounding atmosphere by a number of open channels.
    Notes: Résumé Deux mécanismes d'aération ont été observés en Côte d'Ivoire et dans l'Uganda, chezMacrotermes natalensis (fig. 2). En Côte d'Ivoire, il y a une circulation d'air dans les termitiéres. Montant de la ≪cave≫, l'air est réchauffé dans la zone des meules qui semblent être le siège d'une fermentation bactérienne (Lüscher, 1951). Il gagne ensuite la cavité supérieure d'où, par de petits canaux groupés en ≪cheminées≫ latérales, il redescend, refroidi dans la ≪cave≫. Dans ces cheminées, dont la surface intérieure et extérieure est grande, l'oxygène et le gaz carbonique peuvent être échangés avec l'atmosphère, par diffusion au travers des parois, qui sont sèches, minces et poreuses. Dans les termitières de l'Uganda, l'air, réchauffé dans les meules à champignons, monte par un système de canaux dans des cavités situées dans les parties les plus élevées de la termitière, d'où, par pression, il diffuse à travers la paroi sèche et mince. De la cave, qui, dans ces termitières, est en contact direct avec l'atmosphère, l'air frais entre dans le nid par diffusion.
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    Insectes sociaux 3 (1956), S. 293-301 
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  • 32
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    Description / Table of Contents: Zusammenfassung Die Nestbauten vonApicotermes verdienen die Aufmerksamkeit der Biologen. Die genaue Kenntnis ihrer baulichen Voraussetzungen zeigt Probleme auf, die z. T. rätselhaft bleiben. 1. Wir ordnen bestimmten Unterschieden in der Bauweise der einzelnen Arten einen evolutionistischen Charakter zu: “perfectionnement” durch Komplizierung einfacher (primitiver) Merkmale; Differenzierung; Regression mit Funktionsverlust, etc. 2. Die Existenz von Nestern extrem verschiedener Größe weist auf das Problem des Wachstums der Bauten hin. Gewisse Hinweise stützen die Hypothese der Vergrößerung durch Addition und Destruktion. 3. Die exakte Bezeichnung der organisierten Bauanordnung in der Entwicklung der Nester bleibt rätselhaft, obgleich ihre Rolle in der Klimatisation der Termitennester sehr wahrscheinlich ist. 4. Der Begriff derkollektiven Zusammenarbeit der Arbeit bei den sozialen Insekten drängt sich bei allen Bauten vonApicotermes auf. Die Notwendigkeit zu solcher Koordination erscheint besonders “frappant” bei der komplizierten Struktur des Schirmes vonApicotermes lamani Sj. Die Untersuchung mittelst Roentgenstrahlen des besagten Schirmes liefert in dieser Hinsicht unvermutete und hochbedeutsame Merkmale. 5. Die Kenntnis eines Planes, die sich bei dieser Architektur unserem Geist aufdrängt, scheint einer positiven Erklärung nicht zugänglich zu sein.
    Notes: Summary The construction of nests byApicotermes deserves the attention of biologists. The precise knowledge of their architectural arrangement raises numerous problems, some of which remain enigmas. 1. We attribute certain distinctions in the manner of construction in different types of nest to an evolutionary character: “perfectionnement” by the more complex development of simpler (more primitive) arrangements, differenciation, regression by loss of function, etc. 2. The existence of nests of extremely different sizes presents the problem of the growth of the constructions. Certain signs support the hypothesis of enlargement by addition and by destruction. 3. The exact designation of the building arrangements within the development of the nests remain enigmatic, although it is highly probable that they play a part in the “climatisation” of the termite nests. 4. In all constructions of theApicotermes we are compelled to consider the concept of collective coordination among the workers of the social insects. The necessity for such coordination appears especially striking in the complicated structure of the outer protecting wall of theApicotermes lamani Sj. A radiographical examination of this wall reveals unexpected and highly important features in this respect. 5. The idea of a plan, which we are forced to consider when faced with these architectural achievements, seems to have no positive explanation.
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  • 33
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    Keywords: Stingless bees ; Plebeia remota ; social evolution ; division of labour
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    Notes: Summary The genusPlebeia has a special significance for the study of social evolution of stingless bees: morphologically primitive, its species display a wealth of behavioural evolution, especially with respect to the oviposition process. We comparePlebeia remota with the few other members of the genus studied so far. Related to its subtropical geographical range, brood production is seasonal (there is no brood in the colony in colder months), and adult workers occur as summer and winter bees. The nest is in tree cavities, and the involucrum is absent or restricted to the winter period. Brood cells are arranged in horizontal combs, and new cells are built completely synchronously. Each series consists of up to 50 cells, their number being mainly dependent on colony size. Construction speed is remarkably constant, allowing 4–6 batches per 24 hours. Cell building and provisioning are activities of a small group of specialized workers. The oviposition cycle follows the classical subdivisions for stingless bees. During the patrolling phase a worker may “offer” a trophic egg in a most remarkable way: while retreating backward from the queen she bends the abdomen under thorax and head, and lays an egg on the comb. This egg is eaten by the queen or a worker. The provisioning, oviposition and operculation of all cells occur simultaneously, each cell is provisioned by 4–9 workers. Localization of a cell by the queen may be facilitated by its characteristic guard, which “defends” the cell against the approaching queen. The degree of synchronization within a batch is very high: the duration per cell lasts 420–950 sec, the batch of up till 50 cells needs only 557–1160 sec. Operculation is done by a worker that was not involved in the previous steps. Males are generally produced by the queen. Several male producing cycles per year occur. In orphan colonies laying workers give rise to males, and in queenright colonies workers may occasionally reproduce as well. Division of labour follows the general pattern for stingless bees; however, cell building and provisioning are activities of a specialized group of workers.
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  • 34
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    Keywords: Apis mellifera ; queen pheromone ; queen rearing ; monogyny ; Africanized
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    Notes: Summary Queen rearing is suppressed in honey bees (Apis mellifera L.) by pheromones, particularly the queen's mandibular gland pheromone. In this study we compared this pheromonally-based inhibition between temperate and tropically-evolved honey bees. Colonies of European and Africanized bees were exposed to synthetic queen mandibular gland pheromone (QMP) for ten days following removal of resident queens, and their queen rearing responses were examined. Queen rearing was suppressed similarly in both European and Africanized honey bees with the addition of synthetic QMP, indicating that QMP acts on workers of both races in a comparable fashion. QMP completely suppressed queen cell production for two days, but by day six, cells containing queen larvae were present in all treated colonies, indicating that other signals play a role in the suppression of queen rearing. In queenless control colonies not treated with QMP, Africanized bees reared 30% fewer queens than Europeans, possibly due to racial differences in response to feedback from developing queens and/or their cells. Queen development rate was faster in Africanized colonies, or they selected older larvae to initiate cells, as only 1 % of queen cells were unsealed after 10 days compared with 12% unsealed cells in European colonies.
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    Insectes sociaux 42 (1995), S. 123-127 
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    Keywords: Drone congregation area ; sexual behaviour ; chemical communication ; male competition ; Meliponinae
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    Notes: Summary This is a first behavioural description of a large non-nest associated drone congregation of the stingless beeMelipona favosa. The about 400 drones had originated from different nests. The males interacted aggressively. Several gynes arrived at the drone congregation area (DCA). Olfactory stimuli triggered specific behaviours of the males as well as of the gynes but matings were not observed at the DCA.
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    Insectes sociaux 42 (1995), S. 137-144 
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    Keywords: Stomodeal trophallaxis ; Ponerinae ; ergatoid male ; ergatoid queen ; Hypoponera
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    Notes: Summary The present paper describes for the first time that adult-to-adult trophallaxis exists in ponerine ants. Furthermore, it shows that the adult castes of the ponerine andHypoponera sp. have different habits of trophallaxis. Workers display a soliciting behavior toward queens, males and workers, but receive regurgitated food only from workers. The workers are forced to stop soliciting for regurgitated food by the “whipping behavior” of the queen. Callow queens solicit regurgitated food from workers and ergatoid males and receive it, while mature queens do not solicit regurgitation from workers. Ergatoid males receive regurgitated food from workers and regurgitate it to queens. Alate males show no trophallactic food exchange with workers and queens. Trophallactic behavior was never observed between males of either winged or ergatoid types.
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    Insectes sociaux 38 (1991), S. 171-188 
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    Keywords: Halictidae ; Lasioglossum ; colony dynamics
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    Notes: Summary Proximate control of colony dynamics was studied in the primitively eusocial halictine beeLasioglossum (Dialictus) zephyrum using allozyme markers. The results indicate that workers produce on average 15% of the male brood (range=0–50%) in small laboratory colonies made up of unrelated, single-generation, uninseminated females. This proportion is not influenced by colony size, but is influenced by the relative size of the queen. Large queens are more successful in dominating their workers than are small queens, the queen being defined as the female that is the mother of most of the brood produced in the colony. Older and larger females tend to become queens. Thus, while small differences in age (up to 4 days) influence which female becomes a queen, her ability to control her workers is primarily influenced by her relative size. The proportion of reproduction that is co-opted by the queen is negatively correlated with colony reproductivity (the number of males/day/female). Colony reproductivity is also negatively correlated with the standard deviation in size among females.
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  • 38
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    Insectes sociaux 38 (1991), S. 195-204 
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    Keywords: Formicidae ; Tapinoma ; population biology ; Australia
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    Notes: Summary Nests ofTapinoma minutum were collected and mapped from a wet sclerophyll forest in New South Wales during the spring, summer, and fall seasons. Queen number was variable, indicating the population is both facultatively polygynous and polydomous. Electrophoretic data from three polymorphic enzymes revealed that relatedness among workers conformed to the Hamiltonian expectation of 0.75. Colony boundaries were inferred from electrophoretic data synthesized with nest spatial locations. For this species colonies were composed of at most three nests; this simple pattern of polydomy suggests it has a recent origin in this population. The pattern of facultative polygyny may be linked to an apparent high rate of colony orphaning.
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    Insectes sociaux 38 (1991), S. 217-218 
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    Insectes sociaux 38 (1991), S. 213-216 
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    Keywords: Ropalidia marginata ; Unmated queens ; Individual selection ; Evolution of sociality
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    Notes: Summary In the primitively eusocial tropical waspRopalidia marginata, five out of eleven colonies studied had an unmated female as their queen. In two colonies this was the case despite the presence of another mated individual in the colony. We found no detectable differences between colonies with unmated queens and those with mated queens. We argue that in species such asR. marginata, where intracolony relatedness is expected to be low and where sociality is likely to be maintained because several individuals have opportunities for direct reproduction in the future, individual selection is likely to override “the good of the colony” and lead to such phenomena as that of unmated queens.
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    Insectes sociaux 38 (1991), S. 219-220 
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  • 42
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    Insectes sociaux 38 (1991), S. 251-262 
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    Keywords: Isoptera ; Termitidae ; Macrotermitinae ; instar duration ; production ; biomass
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    Notes: Summary Production in mature termite nests consists of a seasonal brood of reproductives and a continuous turnover of steriles. The sterile population of the nest remained fairly constant, with no regular seasonal fluctuations. Growth rates of steriles were estimated by interrupting the input and following the “missing cohort”. Estimated mean values of standing crop biomass and annual production in a mature nest were used to calculate a production-to-biomass ratio. In conjunction with data on the density of nests in the field, the biomass and production per hectare were estimated.
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  • 43
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    Keywords: Soil-feeding termites ; tropical rainforest ; humic compounds ; structural stability
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    Notes: Summary A comparison was made of some physicochemical characteristics of epigeous termitaries (nest walls and surrounding horizons) of four species of soil-feeding termites living in tropical rainforests. Our aim was to determine whether these species affect the different compounds involved in the structural stability of soil in a similar manner. Our data support the general finding that the structural stability of soil is correlated with organic matter, cations and the relative proportion of mineral elements. Of these parameters, the content of organic matter is the most significant factor effecting the stability of termite building materials. Analysis of humic compound distribution revealed that fulvic and humic acids, owing to their electrochemical properties, are highly involved. Also, the organic matter in termitaries is more polymerized than that of humiferous control horizons, leading to FA/HA ratios close to 1. The stability of nest walls and topsoils differs between the species. Generally, the speciesNoditermes lamanianus, Thoracotermes macrothorax andCubitermes fungifaber build nests that are enriched with organic matter and exchangeable cations, resulting in high structural stability. In contrast, materials worked byCrenetermes albotarsalis are not enriched with organic matter or cations and do not differ in stability from the control soils. It is concluded that any generalization on the overall influence of soil-feeding termites on soil fertility might be misleading. Only species which enrich their materials with organic matter, especially stabilised humic acids, contribute to soil conservation and hence fertility. Once the termitary is dead, its organic matter is again available to the soil ecosystem.
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  • 44
    ISSN: 1420-9098
    Keywords: Honey bee ; Apis mellifera ; queen pheromone ; age effect ; olfactory behavior ; olfactometer
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    Notes: Summary Behavioral responses of differently aged worker beesApis mellifera to a queen pheromonal extract were analysed. The bees were tested individually in a four-armed olfactometer, one arm being scented with the pheromonal extract. This extract was prepared from heads of 14–17-day-old unmated queens. Among the components of the blend, 470 μg 9-keto-2-(E)-decenoic acid, 200 μg 9-hydroxy-2-(E)-decenoic acid and 5 μgp-hydroxybenzoic acid methyl ester per queen equivalent were dosed. An age dependency in the worker bees' olfactory response to the components of the queen extract was shown, the strongest response occurring below the age of 5 days.
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  • 45
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    Keywords: Ontogeny ; Formicidae ; learning ; queen attractant cues ; queen recognition ; Cataglyphis cursor
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    Notes: Summary The behaviour ofCataglyphis cursor workers towards queens at 15 days, one month or two months after worker emergence was tested. Workers reared entirely with their own maternal queen were tested with this queen or with an unfamiliar alien queen. Workers transferred within 48 h of emerging to a new definitive nest with an alien queen were tested with this queen or with the original maternal queen. The degree of attraction to each of these queens and the workers' behavioural repertoire were measured and analysed. The results showed the following: 1) The attractiveness of queens and the workers' queen recognition behaviour were linked. 2) Although unfamiliar alien queens hardly attract workers, familiar alien queens were as attractive as maternal queens, and induced the same strongly marked and unique worker response, indicating that workers learn queen attractant cues in the days immediately after emergence. 3) Agonistic reactions were observed, but workers continued to be attracted to their maternal queen even after developing an attraction response to an alien queen with which they had been reared. These results agree with the proposal that queens produce two kinds of pheromones, those that attract workers and those that mediate recognition of queens by workers. These results show the ability of workers to discriminate between queens. Workers are attracted to any queen, but recognize as nestmates only maternal or alien queens with which they have been maintained. 4) The differential in worker attraction and recognition from 15 days to 2 months and its modifications by post-imaginal experience illustrate worker behavioural ontogeny, which is a basis of social discrimination.
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    Insectes sociaux 38 (1991), S. 307-316 
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    Keywords: Dolichoderus ; silk production ; worker ; nest building ; rain forest ; Malaysia
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    Notes: Summary In a montane Malayan rain forest, at an elevation of about 900 m above sea level, we found an undetermined and possibly undescribedDolichoderus species of thethoracicus group, living in colonies consisting of 50–100 silken pavilions on the undersides of leaves of different species of trees. Inside these pavilions, the ants kept scale insects, which we never found outside the nests on the colony tree. The stock of symbionts was actively regulated; supernumerary scale insects were thrown to the ground by the workers. New pavilions were colonized with scale insects. Our observations and behavioural experiments revealed that the silken material is produced by neither the brood nor the scale insects, but by the worker ants. This is the first proof of weaver ants outside the subfamily Camponotinae.
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    Insectes sociaux 38 (1991), S. 333-334 
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  • 48
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    Keywords: Thaumatomyrmex ; taxonomy ; comparative morphology ; predation ; Polyxenidae
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    Notes: Summary We describe, for the first time, the predatory behaviour ofThaumatomyrmex ants on millipedes of the family Polyxenidae, based on field observations ofT. atrox and a field and laboratory study ofT. contumax. The capture of the prey and the removal process of its body-covering setae by the ants before they eat the millipede are described. This specialized behaviour in at least two species of the genus, belonging to two distinct groups of species, indicates a general trend inThaumatomyrmex. We coupled this study with a comparative morphological analysis of the mouthparts and digestive tube of these and otherThaumatomyrmex species. Also, we report the first case of sympatry in the genus, which suggests thatThaumatomyrmex includes several species, and not only one highly variable taxon, as hypothetized earlier.
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  • 49
    ISSN: 1420-9098
    Keywords: Soldier ; social behaviour ; aphid ; Pseudoregma
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    Notes: Summary Life history and behavioural characteristics of the bamboo aphid,Pseudoregma bambucicola (Takahashi), which has sterile soldiers, were studied in the laboratory. The stadium of normal (fertile) first instar larvae was two times longer than that of second instar larvae, and the stadium of soldier-type (sterile) first instar larvae was much longer (max. 116 days) than the stadium of normal first instar, suggesting that soldiers are able to take nutrition from bamboo. Stimulation of larvae with breath, vibration of bamboo shoots or disturbing the larvae with the tip of a fine brush induced significantly more defensive acts by soldiers than those by normal larvae — the latter usually fled. Soldiers did not attack non-kin conspecific intruders or even aphids of different species, suggesting that, in this species, kin-recognition ability is low.
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    Insectes sociaux 38 (1991), S. 331-332 
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  • 51
    ISSN: 1420-9098
    Keywords: Nuptial flights ; sexual behaviour ; polygyny ; Leptothoracini
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    Topics: Biology
    Notes: Summary We describe in detail a very large nuptial flight of the antLeptothorax acervorum at an open hilltop site in Britain. The mating behaviour of these ants involved not only a large mating swarm but also sexual/calling behaviour by the females. The females left the flight to land on vertical objects, where they took up a characteristic calling posture, in which females of closely related species are known to release pheromones that are sexually attractive to males. ThatLeptothorax acervorum has a complex mating behaviour involving both large nuptial flights and sexual calling has important consequences for the interpretation of the evolution of polygyny in this species and social parasitism in its close relatives.
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  • 52
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    Insectes sociaux 38 (1991), S. 345-349 
    ISSN: 1420-9098
    Keywords: Chemical communication ; exploration ; Lasius pallitarsis ; novelty ; recruitment
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    Topics: Biology
    Notes: Summary Lasius pallitarsis ants were placed in situations where they encountered unfamiliar areas and had to choose between one of two directions for further exploration. Workers advancing onto new ground apparently leave behind some chemical signature to which later ants orient. This orientation occurred under two types of experimental conditions. First, ants show a significant tendency to follow each other as they advance out from their colony into unexplored areas. The same ants transferred into an entirely novel situation, in which there is no obvious “homeward” direction, show similar behavior. When ants are coming from familiar ground, following tends to increase as the number of ants passing the decision point increases. However, following decreases when ants are on entirely novel ground. The results are discussed in relation to models describing foraging responses.
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  • 53
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    Insectes sociaux 38 (1991), S. 351-363 
    ISSN: 1420-9098
    Keywords: Central Spain ; cereal croplands ; density ; distribution ; Messor ; nests ; site selection
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    Topics: Biology
    Notes: Summary Patterns of abundance and site selection of granivorous ant nests were investigated in extensive cereal croplands of Central Spain. Nest densities and distributions were measured in two consecutive summers (1988 and 1989), together with habitat physiognomy and seed availability. Nest site selection patterns were analysed at two spatial scales (landscape and microhabitat) with respect to habitat physiognomy. Results indicate a very constant and predictable pattern of both nest abundance and nest site selection. Granivorous ant nests were most abundant in shrublands, and shrubby microsites were selected for nest placement. Croplands, and microsites with high covers of bare ground and litter, were avoided. These patterns were consistent between years despite a 1.7-fold increase in shrubland nest densities, that was attributed to the exceptionally dry winter between nest censuses. I suggest that winter survivorship of ant nests in the unploughed landscape units, and periodic ploughing in croplands, may be the main factors constraining granivorous ant densities in the landscape studied.
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  • 54
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    Insectes sociaux 38 (1991), S. 423-437 
    ISSN: 1420-9098
    Keywords: Stenogastrinae ; Anischnogaster ; social behaviour ; colony biology
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    Topics: Biology
    Notes: Summary Level of social organization, adult behaviour, size and development of the brood in three species ofAnischnogaster are described. The normal colony size in all the three species was one female per nest, and colony size never exceeded two females per nest. The social interactions, which were only observed in one species, did not include any marked dominance behaviour, but there was clear caste differentiation, with the older female guarding the nest while the younger female foraged for food. InAnischnogaster sp. A only some eggs and larvae have abdominal secretion, while no secretion at all was found on the eggs and larvae ofA. laticeps. In spite of this, the Dufour's gland was found to be well developed. The significance of this is discussed. Females ofA. laticeps were found to fall into two groups distinguished by the length of the sting. The larvae seem quite similar to those of other Stenogastrinae and have, apparently, only four instars.
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  • 55
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    Keywords: Tropical soils ; porosity ; Isoptera
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    Topics: Biology
    Description / Table of Contents: Summary Insights on the porous properties and evolving sizes of sample pores have been derived by means of physical measures carried out on several soil samples of various sizes placed under a hydric strain of 0.1 MPa. Under the very influence ofT. macrothorax (humivorous termite), surface horizons are the first to be altered. Within one metre's radius around their nest, a significant increase of porosity is noticeable, reaching an exceptionally high degree at the bottom of the nest. The volume of pores 〉 1.5 μm is held to be considerably amplified as compared with control soils; however, the interference 〈 1.5 μm pores. The masticative and mechanical power of termites on the soil, together with the organic matter bulk increase turn out to play a paramount role in the stability ofT. macrothorax constructions. On the contrary, horizons in the vicinity ofM. mulleri's nests (fungus growing termite) undergo a diminutive porosity with the total disappearance of pores 〉 1.5 μm. A sharp decrease or organic matter rates has been recorded. Alternatively, as far asM. mulleri are concerned, physical and physico-chemical data do emphasize that the soil structural stability is not to be correctly ensured by the cohesive properties which are normally to be taken into account with this type of material.
    Notes: Résumé A partir de mesures physiques réalisées sur des échantillons de sols de différentes tailles portés a une contrainte hydrique de 0,1 MPa on obtient des informations sur la porosite et l'évolution de la taille des pores des échantillons. L'action deT. macrothorax (termite humivore) sur le sol affecte en premier lieu les horizons de surface. On note, à 1 mètre autour du nid, une forte augmentation de la porosité qui devient exceptionnellement élevée au pied de la termitière. Le volume des pores de 〉 à 1,5 μm est considérablement amplifié par rapport au sol témoin mais la contribution des pores de 〈 à 1,5 μm diminue. L'action mécanique de mastication du sol par les termites conjuguée à l'augmentation de matière organique apparait jouer un rôle décisif dans la stabilité des contructions deT. macrothorax. Les horizons avoisinants le nid deM. mülleri (termite champignonniste) ainsi que la muraille du nid enregistrent une diminution de la porosité avec disparition complète des pores 〉 1,5 μm. On constate dans ce cas une baisse du taux de matière organique dans les échantillons. Dans le cas deM. mülleri les données physiques et physico-chimiques montrent que la stabilité structurale du sol ne peut être vraisemblablement pas assurée par les forces de cohésion envisagées habituellement dans ce genre de matériau.
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  • 56
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    Insectes sociaux 39 (1992), S. 1-1 
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  • 57
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    Insectes sociaux 39 (1992), S. 3-13 
    ISSN: 1420-9098
    Keywords: Ants ; colony founding ; competition ; Lasius pallitarsis ; pleometrosis
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    Topics: Biology
    Notes: Summary Ant queens often cooperate in starting colonies (pleometrosis), but not all foundresses are likely to achieve equal reproductive success. Therefore, joining decisions may be influenced by queens' perceptions of a partner's likelihood to be of mutualistic benefit or to be a successful competitor in eventually controlling reproduction. Large queen size (as measured by weight) was assumed to be a desired characteristic in a mutualistic partner, but to be avoided in a potential competitor. With respect to this variable,Lasius pallitarsis queens appeared to join others in a manner consistent with increasing their competitive advantage. When given a choice between joining another queen or nesting alone, only queens with a large weight advantage were significantly likely to join. When given a choice between joining either a light or a heavy queen, queens of all weights preferentially joined the lighter resident. Moreover, when queen condition was improved by feeding, changes in joining behavior were consistent with predictions of improved competitive ability. Finally, lighter queens were more likely to leave nest sites when joined by others. However, queens significantly aggregated when in high densities, which may be consistent with gaining mutualistic benefits. Pleometrosis appears to have an evolutionary dynamic between mutualistic group benefits and individual competition to monopolize those benefits.
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  • 58
    ISSN: 1420-9098
    Keywords: Ants ; polygyny ; polydomy ; sibling species
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    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.
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  • 59
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    Insectes sociaux 39 (1992), S. 117-127 
    ISSN: 1420-9098
    Keywords: Competition ; community ; Leptothorax ; Monomorium
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    Notes: Summary Interference competition for nest sites was studied in ant communities dominated byLeptothorax congruus in the suburbs of Tokyo, central Japan. At the two study plots located in a deciduous wood and in grassland,L. congruus constructed nests in dead branches or stems of dead grasses. Approximately 50% of the nests were physically broken within a year, suggesting that they were very fragile. Of totals of 67 and 91 nests ofL. congruus marked at the two sites, 12 (17.5%) and 53 (58.2%) nests, respectively, were replaced by other ant species (Monomorium intrudens,Crematogaster brunnea teranishii,Camponotus itoi andLasius sp.) which were common in both habitats. Field observation suggested that, among these ants,M. intrudens was a major competitor usurping the nests ofL. congruus by aggressive invasion.
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  • 60
    ISSN: 1420-9098
    Keywords: Ants ; colony growth ; development of behavior ; predation strategy ; guarding behavior
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    Notes: Summary We traced the development in the laboratory of 18 young colonies of the arboricolous ponerine antEctatomma tuberculatum. Colony foundation is of the partially-claustral type. During the early stages, when the colony is entirely dependent on the queen's behavior, the growth of the colony in terms of number of workers produced over time was relatively predictable. Afterwards, divergence in colony growth in function of the time increases as fast as the number of workers influences the efficiency of colony provisioning. Comparative analysis indicated clear changes in the predation behavior of foundresses and workers as colonies developed. For any stage of colony growth, all individuals provisioned the nest with dead prey or sugar-rich substances in the same way. However, prey hunting involves two different strategies. Foundresses and nanitic workers (originating from colonies with 9–15 workers) foraged actively, catching prey as the result of random encounters. Post-nanitic foragers (originating from colonies with 20–30 workers) and those from nature colonies developed an ambush strategy. Workers in these colonies gained experience at catching and handling prey during a period when they acted as nest guards, and so tended to be more efficient hunters than poorly experienced foundresses or nanitic foragers. The change in strategy was also positively correlated with an increase in the size of workers as the colony matured. A stable maximum in workers size is apparently reached only after the appearance of efficiently hunting foragers, presumably in numbers sufficient to provide adequate quantity and quality of larval food. Such a correlation between worker size and colony growth, assumed general for all ants, has not been demonstrated for Ponerinae before this work.
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  • 61
    ISSN: 1420-9098
    Keywords: African honey bee ; scutellata ; swarming ; absconding ; migration
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    Topics: Biology
    Notes: Summary The relationship between the annual colony cycle and seasonal patterns of forage availability was investigated for the African honey bee,Apis mellifera scutellata, in the Okavango River Delta, Botswana. The annual cycle occurred in three distinct periods. The swarming season occurred from October-November, following two to three months of intense brood production, and coincided with the end of peak forage abundance. The migration season occurred from November-May and coincided with reduced and variable floral resources. During the migration season, brood production and food storage were generally low but quite variable from month to month, and swarms passing over the study area at this time traveled in an easterly direction. The migration season was followed by the establishment period (June-September), in which large numbers of new colonies traveling from the west moved into the study area. The establishment period coincided with, and slightly preceded, the period of peak forage abundance, and colonies devoted resources collected at this time almost entirely to brood rearing, which culminated in swarm production. The data suggest that honey bee colonies in the Okavango are mobile and gear their reproduction and movement to seasonally shifting resource pattern.
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  • 62
    ISSN: 1420-9098
    Keywords: Apis mellifera scutellata ; African honey bee ; foraging ; brood rearing
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    Notes: Summary Seasonal foraging patterns were investigated using six observation colonies maintained in the Okavango Delta, Botswana. Pollen collection, flight from the hive, and recruitment for pollen and nectar sources occurred throughout the 11 months of the study. However, the distribution of foraging activity throughout the day changed seasonally. Colonies emphasized recruitment for pollen sites throughout most of the year. Brood production occurred in all months except May, and there was a significant, positive correlation between the proportion of recruitment activity devoted to pollen sources and the amount of brood comb in the colonies. The seasonal foraging patterns ofscutellata in the Okavango were similar to those of Africanized honey bees in the neotropics. The extended foraging season and emphasis on pollen collection may be associated with the high swarming rates and migrational movements of tropical honey bees.
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  • 63
    ISSN: 1420-9098
    Keywords: Camponotus pennsylvanicus ; compound eye ; ommatidia number ; Polymorphism ; caste development
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    Notes: Summary The relation of worker size to ommatidia number was examined in the polymorphic antCamponotus pennsylvanicus (DeGeer). Linear regression described this relationship as:Y = 260.9 + 113.6×; whereYis ommatidia number andX is head width. A log-log regression described this relationship as:Y = 323.5 + 286.9*logX(r 2 = 0.98). This analysis indicated an allometric relation of ommatidia number to head width, where ommatidia numbers increase at a slower rate than head width. This relationship is discussed in terms of ethotypes associated with worker morphotypes, and the possible mechanisms regulating polymorphic development.
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  • 64
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    Insectes sociaux 39 (1992), S. 201-213 
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    Keywords: Foraging ; recruitment ; colonies ; social insects ; ants
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    Notes: Summary A numerical model of an eusocial colony foraging for food showed that, for each set of values of resource density, resource size and recruitment system employed, a given optimal proportion of scouts in the colony maximize the amount of resources retrieved by a colony during a fixed period. The model predicts that ants using mass recruitment systems should have larger colonies with small foragers, and should forage on large food sources. Retrieval of small food sources by small colonies is best achieved with large workers using individual foraging strategies. For mass foragers, several food sources are best retrieved using democratic decision-making systems in recruitment, whereas for very large food sources at very low mean food patch density, autocratic decision-making systems are optimal. Some of the experimental evidence available is discussed in the light of these findings, as they confirm the prediction that large colonies with small workers have mass recruitment systems, whereas workers of small colonies with large workers are generally lone foragers.
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  • 65
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    Insectes sociaux 43 (1996), S. 47-51 
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    Keywords: Colony foundation ; haplometrosis ; pleometrosis ; Acromyrmex striatus ; Attini
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    Topics: Biology
    Notes: Summary Laboratory tests with mated females of the leaf-cutting antsAcromyrmex striatus (Myrmicinae, Attini) were conducted to determine if the colony foundation is a solitary or a mutualistic process. We have also tested the effect of foundresses density and number of available areas in this process. Three bioassays were performed: with single foundresses; with paired foundresses; and with groups of 8 to 18 foundresses. The results suggest that the foundation can be by haplometrosis or pleometrosis, possibly depending on physical distances between or densities of foundresses. Foraging activity was common in haplometrotic queens and in foundress pairs, but no foraging occurred in groups of foundresses.
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  • 66
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    Keywords: Interspecific trail following ; workerless inquiline ant ; Pogonomyrmex colei ; reproductive biology ; seed-harvester ants
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    Topics: Biology
    Notes: Summary Pogonomyrmex colei is a workerless inquiline ant known only from nests ofP. rugosus, its closest relative. Ten of 776 (1.3%) host nests were parasitized at a site in central Arizona, while none of 1499 potential host colonies were parasitized at two other locales. Colonies ofP. colei are perennial, and host alate females in 9 of 10 colonies demonstrates that host queens survive parasitism. Three of 10 colonies died over 19 colony years of observation, while only 1 of 601 colonies became newly parasitized. Mating occurs in morning for up to 2–3 days following summer and fall rains and in afternoon during cool fall days. Mating is intranidal just outside the nest entrance, with males returning to the natal nest. MaleP. colei may be flightless because their wing area is reduced compared to host males. Females fly from the nest and locate potential host colonies by following trunk trails. Workers are the largest barrier to nest establishment, as they removed over 90% ofP. colei females placed in trunk trails or that entered host nests. Males and females ofP. colei andP. anergismus, the only other congeneric inquiline species, are diminutive compared to their hosts, with females 30% lighter than host workers. Fat content is lower and water content is higher inP. colei andP. anergismus females than in their hosts.
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  • 67
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    Insectes sociaux 43 (1996), S. 101-104 
    ISSN: 1420-9098
    Keywords: Cataglyphis floricola ; diet ; food resources ; petal consumption
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    Topics: Biology
    Notes: Summary C. floricola is an endemic species from the southern Iberian Peninsula which collects large amounts ofHalimium halimifolium petals. Laboratory and field observations confirm that both workers and larvae feed on these petals, which represent an important food resource forC. floricola colonies. This petal consumption is a very unusual ant diet.
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  • 68
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    Insectes sociaux 43 (1996), S. 111-118 
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    Keywords: Predation ; polyethism ; food exchange ; behavioral flexibility ; Ectatomma ruidum
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    Topics: Biology
    Notes: Summary During laboratory experiments, two categories of prey-foraging workers were found inEctatomma ruidum: stingers and transporters. When numerous live drosophila were offered to the ants, one group of hunters specialized in killing the prey and another in transporting simultaneously the dead drosophila to the nest. Sometimes, there was a transfer of prey by a stinger towards a transporter, after an active soliciting of the transporter by antennation or by using the forelegs. We found high positive correlations between the colony size and the number of ants in each subcaste. A negative correlation existed between the colony size and the proportion of hunters. However, the proportion of workers in the two behavioral subcastes of hunters was stable in spite of differences in colony size. The phylogenetic interest of this type of cooperative predation is discussed.
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    Insectes sociaux 46 (1999), S. 131-136 
    ISSN: 1420-9098
    Keywords: Key words:Vespula, Polistes, Vespidae, foraging, resource choice.
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    Topics: Biology
    Notes: Summary: The role of visual cues provided by resident wasps on resource choice by yellowjacket and paper wasp foragers was investigated. Large spring queen yellowjackets and small early season yellowjacket foragers (Vespula germanica, Vespula maculifrons, and Vespula vidua) were extracted in hexane to remove odors and posed as though feeding at petri dish feeders bearing daisy-like flower models, equipped with microcapillary feeding tubes, and containing 1:3 honey:water solution. An array of five feeders was presented to foragers at a suburban and a woodland site in Saratoga Springs, New York. The visual cues provided by resident wasps influenced resource choice by approaching social wasp foragers. Vespula germanica, an introduced yellowjacket species that tends to dominate at rich resources, was the only wasp visiting the suburban feeders. Foragers of this species preferentially fed on feeders and flowers with posed wasps and fed most often next to large wasps. Polistes fuscatus foragers at the woodland site similarly preferred to feed on occupied feeders and flowers. Vespula maculifrons and V. consobrina preferentially visited unoccupied feeders. Individual V. maculifrons, V. consobrina and V. vidua foragers that landed on occupied feeders all preferentially visited unoccupied flowers on those feeders. Vespula vidua and V. flavopilosa foragers did not demonstrate a feeder preference based on the presence/absence of posed wasps. Vespula consobrina foragers that visited occupied feeders preferred those occupied by extracted V. maculifrons queens and workers; no other wasps showed species based landing preferences.
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    Insectes sociaux 46 (1999), S. 137-145 
    ISSN: 1420-9098
    Keywords: Key words: Mating frequency, polyandry, Apis mellifera sicula, honey bees, microsatellite.
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    Topics: Biology
    Notes: Summary: Honey bee queens have been shown to mate with a high number of males, but the evolutionary advantage of this high degree of polyandry is still unclear. Mating data from a number of different Apis species and subspecies are needed to help explain polyandry in honey bees. Pupae of four colonies of Apis mellifera sicula from Sicily were genotyped on three polymorphic microsatellite loci. The genotypes of the queens and fathering drones from these colonies were deduced from the genotypes of the pupae. We found no evidence for polygyny, at least we can exclude more than one functional queen, even super-sister queens, if maternity contributions are equal. The four queens mated with at least 5 to 12 (mean: 9.3 ± 3.0 SE) drones. We estimate the error in our determination of the mating frequency that is caused by limited genetic resolution of the marker loci to be less than 1 mating given that Hardy-Weinberg assumptions are satisfied. However, the drones the single queens mated with may be a non-random sample of the whole population, so that detection error may be more severe. The average pedigree relatedness among workers within the colonies was estimated to be 0.341. These results are within the range of those found in other A. mellifera subspecies and Apis species except A. dorsata. We speculate that mating frequency may be positively correlated with drone density.
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  • 71
    ISSN: 1420-9098
    Keywords: Oecophylla longinoda ; orientation ; trail pheromones ; fæcal marking ; chemical communication ; tropics
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    Topics: Biology
    Notes: Summary Trail communication of the weaver antOecophylla longinoda is highly adapted to the African rain forests, insofar natural selection in the tropics might favour chemical trails which are durable in nature. A dry chemical trail can last over nine weeks, and over ten months when reinforced with fecal marking. The trail pheromones are resistant to rain, whether they are fresh or three months old, and whether they are reinforced or not with anal deposits.
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  • 72
    ISSN: 1420-9098
    Keywords: Myrmica rubra ; isozymes ; isoelectric focusing
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    Topics: Biology
    Notes: Summary A polymorphism in the enzyme malate dehydrogenase in Dorset populations ofMyrmica rubra was detected using isoelectric focusing (IEF). The polymorphism was not detected on native polyacrylamide gels. Two forms, with pI values of 4.9 and 5.7, were resolved. Several lines of evidence show that the polymorphism has an environmental rather than a genetic basis. The cause of the change from one phenotype to the other may be related to a seasonally varying factor. The results indicate that whilst IEF has great potential for revealing isozyme polymorphisms in ants, care should be taken in interpreting results.
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  • 73
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    Insectes sociaux 39 (1992), S. 451-454 
    ISSN: 1420-9098
    Keywords: Foraging ; reliability ; task performance ; wasps
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    Topics: Biology
    Notes: Summary Foragers of the neotropical swarm-founding waspPolybia occidentalis showed improved task performance, as indicated by foraging success rate, with foraging age. Foragers also spent significantly more time in the field on foraging trips as they aged, while foraging rate did not change with age. These patterns were not explained by directional changes in resource availability or colony need over time. We compare these results to earlier findings on changes in task performance with experience in social insect foragers, and suggest that increases in forager persistence in the field explain improved foraging success with experience.
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    Insectes sociaux 4 (1957), S. 13-24 
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    Insectes sociaux 4 (1957), S. 1-12 
    ISSN: 1420-9098
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    Topics: Biology
    Description / Table of Contents: Zusammenfassung Vespa dybowskii André kann ihre Nest falls durch die unabhängige Gründung wie andere Hornisse, falls aber durch die Oberung der schon gegründeten Nester vonV. crabro L. oderV. xanthoptera Cameron, gründen. Nämlich gehört diese Hornis zum fakultativen temporären Sozialparasit wieVespula squamosa (Drury) und gewisse Hummelarten. Die bemerkbare Kampflustigkeit dieser Hornisse und andere biologische Beobachtungen wurden zasammen mit einige Betrachtungen über die Arbeitsparasitismus in den sozialen Insekten beschrieben.
    Abstract: Résumé Vespa dybowskii André nidifie soit en construisant elle-même son nid comme les autres guêpes, soit en usurpant des nids deVespa crabro L. ouV. xanthoptera Cameron déjà construits. Cette guêpe appartient donc aux
    Notes: Summary Vespa dybowskii André can establish the nest either by the independent foundation like as other hornets, or by the usurpation of the nests ofV. crabro L. orV. xanthoptera Cameron already established. Namely, this hornet belongs to the facultative temporary social parasite like asVespula squamosa (Drury) and certain bumblebees. The marked aggressiveness of this hornet and other biological observations were described together with some considerations on the labour parasitism among the social insects.
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    Insectes sociaux 4 (1957), S. 43-57 
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    Insectes sociaux 4 (1957), S. 72-76 
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    Insectes sociaux 4 (1957), S. 77-82 
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    Description / Table of Contents: Summary The nest is excavated in pure sand according to an uniform plan. It is not hauly (30 cm) but always damp, and its temperature is never very high. The “soldiers”, (workers with large mandibles) seem to play no part in the nest. They are often carried by the normal workers. The workers dig and carry the sand in a very efficient way, either with their fore legs (dry sand) or with their mandibles and palps (damp sand). A simple experience has shown thatC. bombycina, in spite of its desertic habitat, cannot indure dryness and heat so well asC. bicolor, which dwell in the oases.
    Notes: En résumé C. bombycina, bien que ne possédant pas une grande résistance à la sécheresse, habite des zones sableuses très arides. Mais son nid, malgré sa faible profondeur, est toujours humide. L'efficacité avec laquelle cette espèce travaille le sable est sa meilleure adaptation à ce milieu. L'observation des «soldats» (dont le rôle dans la colonie semble à peu près nul) m'a permis de les voir se faire transporter par les grosses ouvrières, parfois d'une façon inhabituelle chez lesFormicidæ.
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    Keywords: Key words: Worker polymorphism, ant-plant interaction, mutualism, morphometrics.
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    Notes: Summary: We compared intranidal variation in worker size in the two closely related plant-ants Aphomomyrmex afer and Petalomyrmex phylax. Each of these genera is monotypic, and the two appear to be sister species among extant ants. Workers of A. afer are larger on average and exhibit much greater intranidal size variation. Workers of P. phylax are smaller and much less variable in size. Both species show weak allometry for some pairs of characters. Head shape is also different in workers of the two species. We discuss these differences in relation to the ecology of A. afer and P. phylax, and propose a scenario for the evolutionary divergence of worker morphology in these two species. Based on comparisons of these two monotypic genera with related ants, we suggest that reduced intranidal variation in worker size is a derived trait in Petalomyrmex.
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    Insectes sociaux 46 (1999), S. 208-218 
    ISSN: 1420-9098
    Keywords: Key words:Melipona panamica, stingless bees, Apidae, nestmate recognition, worker oviposition.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary: Nestmate recognition was studied in the Neotropical stingless bee Melipona panamica, a species in which workers “sneak” their own reproductive eggs into 1 % of brood cells. We manipulated four factors that could influence individual recognition cues: the mother queen, the environment during the immature stage, the environment during the early adult stage, and worker age. We also simulated the action of natural enemies on colonies tested for discrimination of such worker characteristics. All factors that we tested affected responses of the discriminating workers, which could recognize sisters, nieces and unrelated workers. Previous exposure of unrelated callow bees to the odor of the host nest greatly increased chances of acceptance by the host colony. Probability of acceptance decreased, however, with increasing age of introduced bees or increasing disturbance of the host colony. These complexities in patterns of nestmate recognition and nest defense are adequately explained from the standpoint of inclusive fitness of the discriminating workers. Differences in nestmate recognition and worker egg laying among Meliponini are also discussed.
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    Insectes sociaux 4 (1957), S. 31-41 
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    Notes: Résumé Au cours de recherches d'ordre pratique sur la possibilité de claustrer des ruches (1) nous avons été amenés à envisager particulièrement un point important:l'apport d'eau à la ruche claustrée réduit, dans de fortes proportions, la mortalité des Abeilles. Quel est son mode d'action dans ce phénomène? C'est ce que nous allons essayer d'éclaircir dans cette note.
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    Insectes sociaux 4 (1957), S. 59-71 
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    Insectes sociaux 4 (1957), S. 25-30 
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    Description / Table of Contents: Summary Olfaction takes a part in the reciprocal attraction existing between the different individuals in the colonies ofCalotermes flavicollis. Larvæ are very responsive to the smell of other larvæ and to the density of grouping. Nymphs of the 7th. instar exhibit a higher level of response and are especially sensitive to a grouping of 15 or 20 individuals. Neotenics give the best response to the smell of larvæ, but do not react as well to the differences of density. There does not appear to be any difference in response between the sexes. Soldiers are least sensitive; they exhibit interest towards larvæ, but only for groups formed by 20 larvæ at least.
    Abstract: Zusammenfassung Der Geruchsinn spielt eine Rolle bei den gegenseitigen Beziehungen zwischen den verschiedenen Einzelwesen in den Kolonien vonCalotermes flavicollis. - Die Larven besitzen ein sehr feines Reaktionsvermögen auf den Geruch ihrer Artgenossen und die Dichte einer Gruppe. - Die Nymphen des siebten Stadiums haben eine höhere Sensibilitätsschwelle und sprechen vor allem bei einer Gruppe von 15 oder 20 Wesen an. - Die Neotenischen sind diejenigen, die am empfindlichsten auf den Geruch der Larven aussprechen. - Aber sie reagieren weniger auf die unterschiedliche Dichte. - Es gibt anscheinend keine unterschiedlichen Empfindungsfähigkeiten der Geschlechter. - Die Soldaten sind diejenigen welche am wenigsten empfindungsfähig sind. Bei den Larven bringen sie erst einer Gruppe von 20 Wesen gegen-über Interesse entgegen. *** DIRECT SUPPORT *** A0180125 00002
    Notes: Résumé L'olfaction intervient dans l'interattraction entre les différents individus dans les colonies deCalotermes flavicollis. Les larves sont très sensibles à l'odeur de leurs congénères et à la densité de groupement. Les nymphes du 7e stade ont un seuil de sensibilité plus élevé et sont surtout sensibles à une densité de 15 ou 20 sujets. Les néoténiques sont les plus sensibles à l'odeur des larves, mais ils réagissent moins aux différences de densité. Il ne semble pas y avoir de différence de sensibilité entre les sexes. Les soldats sont les moins sensibles. Ils ne manifestent un intérêt pour les larves qu'à partir d'un groupement de 20 sujets.
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    Insectes sociaux 4 (1957), S. 107-111 
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    Topics: Biology
    Description / Table of Contents: Zusammenfassung Bei den Antennen der Termiten sind 3 Gruppen von Sinnesorganen feststellbar: das Chordotonal Organ des erstens Gliedes; das Chordotonal Organ des zweites Gliedes; das Johnston'sche Organ. Diese Struktur bleibt während der ganzen Ontogenese dieselbe; die Anzuhl der Scolopidialen Nägel steigt langsam an. Das Johnston'sche Organe hingegen insicht davon im Laufe der Häutungen ab, trotzdem seine Modificationen beim Häutungs denen der sensilla trichodea gleichen.
    Notes: Summary In antennæ of Termites there are 3 groups of sense organs: — the chordotonal organ of the scapus;—the chordotonal organ of pedicellus; the Johnston's organ. Their structures are always the same during ontogenesis; the number of scolops increases slowly. Johnston's organ however distinguishes of the other in course of moulting but its modifications are very similar in structure to these of sensilla trichodea.
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    Insectes sociaux 4 (1957), S. 167-167 
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    Insectes sociaux 4 (1957), S. 157-166 
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    Description / Table of Contents: Résumé On a étudié la transmission du miel chez plusieurs espèces de Fourmis en se servant d'iodure radio-actif comme traceur. On observe des différences considérables dans le taux de la transmission d'une espèce à l'autre, allant d'une transmission négligeable pour une période de dix jours (chezPogonomyrmex badius) à une saturation intégrale de la colonie en trente heures (chez certaines espèces deFormica). Le plus souvent, le miel est passé d'une ouvrière à une autre, les reines et les larves recevant très peu de miel. Une preuve indirecte suggère une transmission en chaîne au-delà des dons primaires par les ouvrières fourragères nourries à la source.
    Abstract: Zusammenfassung Die Uebertragung von Honig bei verschiedenen Arten von Ameisen wurde mit Hilfe von Zugabe radioaktiven Iodids untersucht. Eine mit der Mischung gefütterte Arbeiterin wurde in das Nest gesetzt, und die Verteilung des von ihr abgegebenen Honigs gemessen. Die Verteilungs-geschwindigkeit war sehr verschieden je nach der untersuchten Art: praktisch zu vernachlässigende Werte, sogar nach 10 Tagen, beiPogonomyrmex badius; vollständige Sättigung des Staates, nach 30 Stunden, beiFormica spp. Der Honig wurde hauptsächlich unter Arbeiterinnen verteilt; die Königinnen und Larven bekamen, wenn überhaubt, nur minimale Mengen. Die Resultate schienen darauf hinzuweisen, daß zur Verteilung im Staate nicht nur die Abgaben der ursprünglich gefütterten Arbeiterin verantwortlich waren, sondern auch Uebertragung der Empfänger untereinander.
    Notes: Summary Tranmission of honey in several species of ants was studied using radioactive iodide as a tracer. Great variation in transmission rates between species was noted, ranging from negligible transmission over a ten-day period (inPogonomyrmex badius) to complete colony saturation within thirty hours (inFormica spp.). The honey was passed mostly among workers, very little being given to the queens or larvae. Indirect evidence is cited which suggests the occurrrence of chain transmission beyond the primary donations given by the original foragers.
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    Insectes sociaux 4 (1957), S. 113-156 
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    Topics: Biology
    Description / Table of Contents: Summary 1. The variation of acceptation percentage of artificial queen cells are caused by an equilibrium between two substances included in the wax: one of them,acceptation inhibitor (queen substance followingButler, ectohormone followingPain); the other,acceptation accelerator, perhaps secreted by worker bees and much less stable than the former. 2. The most important stimuli releasing the acceptation of a young larva introduced into an artificial queen cell are: the shape of the cell floor (rounded form prefered to flat one); the shape of the cell section (cylindrical prefered to hexagonal, this one prefered to square); the position of cells (opening downwards prefered to opening up-wards or lateral); their distance (optimum 2 cm). But the matter with which the cells is made is unimportant: worker bees accept paraffin, all kind of mineral and vegetal wax, and ever glass and plastics. 3. The young larvae introduced into the cells must be alive and belonging to theApis genus; to be less than three days old; sex is unimportant and male larvae can be accepted. The young larvae belonging to another colony than the breeder one are easily accepted; the queen is not sufficient to elicit the inhibition of queen cells breeding, neither in natural conditions, nor even in artificial ones, if the first phase of the breeding activity has been performed in a queenless colony (starter in beekeeper language).Butler's conclusions are only valuable in the case ofthe building ofnatural queen cells by the bees. It is thisinitial building phase that is the most sensible to inhibiting hormone. But the stimuli issued from the artificial queen cell whith a young larva inside, are strong enough to exceed wholly or partially queen inhibiting influence.
    Notes: Résumé Nous avons vu au cours de cette note qu'il nous restait de nombreuses lacunes à combler. Nous pouvons toutefois émettre certaines hypothèses et affirmer certains faits. 1o Les variations du pourcentage d'acceptation des cupules royales artificielles tiendraient à un équilibre entre deux substances incluses dans la cire: l'une inhibitrice de l'acceptation (queen substance deButler, ectohormone dePain); l'autre, facilitatrice, sécrétée peut-être par les ouvrières et beaucoup moins stable que la première. 2o Parmi les stimuli qui poussent les nourrices à accepter une jeune larve qui leur est présentée dans une cupule de cire comptent: la forme du fond (fond arrondi préféré à fond plat); la forme des bords (forme cylindrique préférée à l'hexagonale, celle-ci préférée à la carrée); la position des cupules (l'ouverture inférieure préférée à l'ouverture latérale ou supérieure); leur écartement (espacement optimum 2 cm). Mais la matière dont est construite la cupule paraît, au contraire, de peu d'importance quisque les ouvrières acceptent la paraffine, toute sorte de cire minérale ou végétale, et même le verre ou les matières plastiques. Pour que la jeune larve introduite dans une cupule artificielle fasse l'objet d'un élevage royal, elle doit être vivante et appartenir au genreApis; son âge doit être inférieur à trois jours; le sexe n'est pas un facteur très important et des larves mâles peuvent être acceptées. Les jeunes larves étrangères à la colonie éleveuse sont acceptées sans difficulté;la présence de la reine ne suffit pas à inhiber l'élevage royal, ni dans les conditions naturelles, ni même dans les artificielles (pourvu qu'il ait débuté dans une colonie orpheline ou ruchette d'acceptation). Les conclusions deButler s'appliquent seulement dans le cas de laconstruction des cellules royales naturelles par les Abeilles; c'est ce stade initial de construction qui est le plus sensible à l'ectohormone inhibitrice. Mais les stimuli provenant de la cupule artificielle contenant une jeune larve sont si puissants qu'ils excédent en tout ou en partie l'action inhibitrice de la reine.
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    Insectes sociaux 4 (1957), S. 173-176 
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    Description / Table of Contents: Résumé En Colombie Britannique, à Westbank,Formica subnitens sont couverts de dômes de détritus et se trouvent seulement dans les zones sans ombre. La surface de récolte d'une colonie s'étend à peu prés sur 230 m et présente une ou plusieurs pistes de fourmis. La production des sexués commence en avril et les adultes quittent la fourmilière au milieu de juin. Les vols sexuels se produisent le matin, entre 8 et 10 heures. Les ouvrières sont produites de juin à août. Elles récoltent d'avril à octobre, lorsque la température au niveau du sol est comprise entre 10 et 50°C. Les fourmis vivent beaucoup aux dépens d'autres Insectes et des sécrétions d'Aphides; celles-ci sont prises en petite quantité au printemps; mais ces quantités augmentent ensuite jusqu'à constituer 50% de la nourriture au milieu de l'été. F. subnitens ne se nourrit apparemment pas deChrysolina gemellata, Chrysomélid importé pour détruireHypericum perforatum.
    Notes: Summary At Westbank, British Columbia, nests ofFormica subnitens Creighton were covered with detritus domes and were found only in unshaded areas. The foraging area of a colony averaged approximately 2.500 square feet and had one or more ant trails. Reproduction of sexuals commenced in April and the adults emerged about mid June. Sexual flights occurred between 8 and 10 a.m. Worker castes were produced from June to August. Worker ants foraged between soil surface temperatures of 51° and 125° F. from April to October. The ant lived largely on other insects and aphid secretions, the latter being taken in small quantities in the spring but making up over 50 per cent of the food by mid summer. F. subnitens apparently did not prey onChrysolina gemellata (Rossi), a chrysomelid imported in an attempt to control common St. John's-wort,Hypericum perforatum L.
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    Insectes sociaux 4 (1957), S. 177-190 
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    Description / Table of Contents: Résumé L'accroissement de la colonie et son développement se font en quatre stades: une période pré-ouvrière, suivie des stades de jeunesse, d'adolescence et de maturité. Le premier stade est celui où la reine engendre et nourrit des petites ouvrières à partir de ses propres réserves. Le stade de jeunesse est marqué par une augmentation progressive de la ponte de la reine et aussi de la taille des ouvrières. La cause en est, sans doute, dans l'amélioration du butin, mais pas exclusivement, et nous signalons notamment l'influence exercée par la reine sur la croissance et le développement des individus, cette influence étant indépendante de l'état de la population. Le state d'adolescence est un stade de transition; c'est à cette époque que les mâles font leur première apparition. Au stade de maturité des ouvrières ayant atteint une taille normale cohabitent avec des fourmis mâles et femelles. Il apparaît des reines, lorsque le rapport ouvrières-larves est considérable. Dans la plupart des colonies, ce rapport varie au hasard autour d'une moyenne et il conditionne la grosseur des larves hivernantes; nous ignorons la cause de cette variation. Une colonie, même forte, comporte des sujets de petite taille si elle n'est pas soumise à un ensoleillement suffisant; ceci prouve que les conditions extérieures sont essentielles dans la production des reines. Il est assez rare de trouver de fortes colonies où le nombre des ouvrières est de beaucoup supérieur au nombre d'individus nécessaire à l'élevage du couvain; l'auteur pense que ceci peut-être dû à l'instabilité causée au sein de la colonie par la production et l'essaimage des sexués. On peut établir une formule géométrique de renouvellement-type qui s'accorde assez bien avec les données collationnées de sources diverses.
    Abstract: Resumen Convenientement, el desarrollo y crecimiento de la colonia puédese dividir en estados como ser: pre-trabajador, juvenil, adolescente y estado maduro. El estado pre-trabajador es aquel en que la reina produce de sus reservas, trabajadoras pequeñas. El estado juvenil se caracteriza por el aumento paulatino en la producción de huevos por parte de la reina como también en el tamaño de las trabajadoras. Sin duda, esto se debe en parte a la mejora en su approvisionamiento pero existen también otros factores; es de gran importancia la influencia ejercida por la reina sobre el crecimiento y desarrollo de individuales, influencia ésta independiente de la tensión de populación. El estado adolescente es transicional-en él aparecen por primera los machos. El estado maduro es uno de trabajadoras perfectas y de producción masculino y femenino. Los genes se producen cuando la proporción de trabajadoras y larva es alta. Por casualidad esto varía en la mayoría de las colonias con un valor reducido y el tamaño de la larva en estado adormecente en proporción, pero se desconoce por qué motivo occurre la variación. Una condición en la producción del gene es de encontrarse la colonia en un ambiente favorable puesto que aún en colonias grandes la insolación pobre produce tamaños pequeños. Es extraño encontrar colonias grandes en las cuales las trabajadoras exeden aquellas que se requieren para la cría y sugiérese que puede ser que esto se debe a la instabilidad de la populación causada por la producción y deseminación sexual. Prodúces pues, un ejemplo de recurrencia geométrica que conforma bastante bien con los datos escogidos en varias maneras y de distintas fuentes.
    Notes: Summary Colony growth and development is conveniently divided into stages: pre-worker, juvenile, adolescent and mature. The pre-worker stage is one in which small workers are produced by the queen from her body reserves. The juvenile stage is characterised by a gradual increase in the egg production of the queen, and in the size of the workers. No doubt this is partly due to an improvement in food capture but other factors also exist; of great importance is the influence that the queen exerts on the growth and, development of individuals, an influence which is independent of population tension The adolescent stage is transtional; in it males first appear. The mature stage is one of full-sized workers and male and female sexual production. Gynes are produced when the ratio workers/larvae is high. This varies randomly in most colonies about a mean value, and the size of the formant winter larvae is proportional to it; but the cause of the variation is unknown. A condition of gyne production is that the colony be in a favourable environment, for even in large colonies, poor insolation causes small individual size. Very large colonies, in which workers are greatly in excess of those needed to rear the brood are uncommon, and it is suggested that this may be due to the population instability which the production and dissemination of sexuals causes. A model of geometric recurrence type is constructed which agrees reasonably well with the facts culled in various ways from different sources.
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    Notes: Summary Field and laboratory data onFormica subnitens Creighton andF. integroides, Emery confirm Cole's assumption that these entities are species. The female and male ofF. subnitens are described.
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  • 91
    ISSN: 1420-9098
    Keywords: Key words: Mitochondrial DNA, restriction site polymorphism, meat ants, Iridomyrmex purpureus, polygyny.
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    Topics: Biology
    Notes: Summary: The Australian meat ant Iridomyrmex purpureus is known from observations and allozyme surveys to have a high proportion of mature colonies polygynous, but very few incipient ones. Sixteen colonies in the vicinity of Maryborough, Victoria, revealed four mtDNA restriction site haplotypes. One of these nests presented two different haplotypes; given the haplotype frequencies, this result suggests that a high proportion of mature nests contain unrelated queens.
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    Insectes sociaux 44 (1997), S. 15-21 
    ISSN: 1420-9098
    Keywords: Key words: Mangrove, ants, Polyrhachis sokolova, nest, inundation, foraging.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary: The nest sites of the mud-nesting ant Polyrhachis sokolova were studied in Darwin Harbour mangroves. They were found from the Ceriops tagal zone to the Rhizophora stylosa zone at elevations ranging from 7.22 to 5.99 meters above the lowest astronomical tide (LAT), which means that the nests were inundated in 13‐61% of all high tides and for durations of up to 3.5 hours. The nest structure was studied by excavating nests and making a cast of the galleries using polyurethane foam. The nests were quite extensive, normally with two elevated nest entrances and galleries down to depths of 45 cm. The loose soil particles at the nest entrances collapsed when the tide reached them and formed a stopper which prevented water from intruding into the nest. In this way, the galleries remained dry during high tide. The ants showed a clear swimming or "walking on the surface" behaviour when they returned to the nest just before the entrance collapsed and during ebb. The tolerance of the ants to submergence was tested in the laboratory, with 50% mortality after 11 hours submergence in seawater at 23 °C, and only 3.5 hours in water at 33 °C. Therefore, the nesting behaviour with trapped air in the galleries is necessary for survival in these environments.
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    Insectes sociaux 44 (1997), S. 23-33 
    ISSN: 1420-9098
    Keywords: Key words: Diversity, chaparral, Formicidae, inventory methods, serpentine.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary: In northern California, ant assemblages in 8 sites in serpentine chaparral habitat were compared with those occurring in 8 chaparral sites on adjacent non-serpentine soils. A total of 27 species of ants was found: 22 species were collected in non-serpentine chaparral and 20 species in serpentine chaparral. Seven species were collected exclusively in non-serpentine, and 5 species were found only in serpentine habitats. A Formica species, conspecific with or closely related to F. xerophila, was found only in serpentine chaparral. Subsequent collections suggest that in northern California, this species is confined to serpentine outcrops. Two other species significantly differed in frequency of occurrence in each habit:Camponotus hyatti, C. cf. vicinus. Five species showed marginal significant differences in their relative abundance between habitats:Camponotus hyatti, C. cf. vicinus, Formica moki, Prenolepis imparis, Leptothorax nevadensis, Stenamma diecki.
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  • 94
    ISSN: 1420-9098
    Keywords: Key words: Foraging activity, Meliponinae, Melipona favosa, M. fasciata, M. beecheii, Tetragonisca angustula.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary: For Melipona fasciata, M. beecheii, M. favosa and Tetragonisca angustula we found distinct intergeneric differences in foraging activity patterns. The Melipona species had a longer daily foraging activity period than T. angustula. Pollen foraging patterns of the Melipona species were different from that of T. angustula: Melipona collect pollen earlier in the day. In an experimental habitat without competitors, Melipona favosa did not collect pollen very early in the day. ¶Individually marked returning foragers demonstrated in the course of the day distinct differences in nature and frequency of interactions with nest mates. Individual foraging flight frequency was lower and the intranidal transfer of nectar was delayed when syrup of a lower concentration was offered. ¶The regulation of daily foraging activity patterns and the nectar foraging behaviour of individual worker bees are discussed.
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  • 95
    ISSN: 1420-9098
    Keywords: Key words: Termites, nest construction, plant growth suppression, plant abundance.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary: Termites invest considerable time and energy constructing elaborate mounds out of clay, sand, silt, excreta and saliva, which they defend vigorously against predators and parasites. Termite mounds are fertile and potentially attractive resources for plants, which may threaten the stability of the mound. Field surveys at Boola Boola Forest in SE Australia revealed significantly higher abundance and diversity of vascular plants growing on uninhabited than inhabited mounds of the termite Coptotermes lacteus. These data reveal that the presence of termites affects the establishment and growth of vegetation. Germination experiments indicate that plant growth suppression is not chemically mediated but rather is due to the impenetrable nature of the mound surface. Analyses of soil types suggests that termite workers may choose particular clay minerals for mound construction, which enhances surface impenetrability and thus increases the engineered integrity of the mound.
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  • 96
    ISSN: 1420-9098
    Keywords: Key words: Eusocial aphids, Pseudoregma bambucicola, resource allocation, soldier investment, reproductive schedule.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary: The reproductive characteristics of the soldier-producing aphid Pseudoregma bambucicola were studied in Kagoshima, Southern Japan, to know the factors affecting soldier production of eusocial aphids. The soldier proportion in aphid colonies was highest from October to November. In some large colonies, soldiers were observed in all seasons except in July when colony size was relatively small. Multiple regression analysis showed that the colony size was a principal factor affecting soldier proportion throughout a year. Other social or environmental factors such as aphid composition, host plant conditions and predator abundance were not always significant. Rearing experiments revealed that large colonies (≥1,000 individuals) produced soldiers in almost all seasons while small colonies (〈1,000) never produced any soldiers. The caste-production schedule of adult females was examined in the field. When solitary females produced both castes, they usually produced normal nymphs first and then soldiers. Females from large colonies tended to produce more soldiers in the earlier period of their lifetime, whereas females from newly established small colonies produced no or only a few soldiers at later times. The average number of soldiers and normal nymphs produced consecutively by a single female was 〉10 and 〉20, respectively. Because they have a small number of ovarioles (〈15 on average), females should alter caste production within the same ovarioles according to changes in environmental conditions. Artificial removal or introduction of predators and reduction of colony size did not affect soldier production over two successive generations, revealing maternal effects on soldier production. Females cannot shift caste production quickly in response to changes in predator abundance and colony size. This is probably due to early developmental determination of castes within the mother's body.
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  • 97
    ISSN: 1420-9098
    Keywords: Key words: Leptothorax, colony size, demography, polydomy, Formicidae.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary: 484 nests of Leptothorax tuberointerruptus were collected from a coastal limestone grassland community in Dorset, England, over a 16 month period from February 1992 to May 1993. Behavioural observations and dissections of females strongly suggested that the nests were obligately monogynous. Electrophoretic data also suggested that within most nests all the workers shared the same mother and father. Counts of nest contents revealed temporary but dramatic drops in both worker and queen numbers per nest in May—June 1992. Seasonal polydomy is postulated to be the cause of this variation. Such dramatic variation highlights the importance of sampling over as much space and time as possible if premature conclusions about colony demography are to be avoided.
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  • 98
    ISSN: 1420-9098
    Keywords: Key words: Ants, foraging, interspecific competition, Myrmica sabuleti, Formica fusca.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary: Myrmica sabuleti forms mature colonies of about one thousand workers and a few queens. Although living in dry and sunny biotopes, this species avoids foraging during the warmer hours of the day which correspond to the period of the maximum foraging activity of two sympatric species, Formica fusca and F. cunicularia. M. sabuleti is the most frequently observed species on the extrafloral nectaries of Vicia sativa, even during the warmer hours of the day, whereas F. fusca is the most frequent species during those hours at tubes of 1M sucrose solutions placed on the ground. In spite of this temporal segregation, the foraging activity of M. sabuleti and F. fusca overlaps two times a day (10:00‐11:00 am and 5:00‐8:00 pm). Newly discovered large food sources are exploited by M. sabuleti through an explosively increasing recruitment, whereas workers of F. fusca forage mainly individually. Interference between M. sabuleti and F. fusca was studied when offering sucrose solutions, large dead insects unretrievable by individual foragers of either species (cockroaches), medium-sized insects retrievable by single foragers of F. fusca but not by single M. sabuleti(larvae of Calliphora erythrocephala) and small insects (Drosophila) retrievable by individual foragers of both species. Owing to its rapid recruitment, M. sabuleti is able to displace F. fusca from sucrose solution and large dead prey during the overlaping of the activity cycles of both species. When medium-sized corpses are offered, the issue depends on the speed of the events. F. fusca is able to take the prey away only if it discovers it before M. sabuleti has recruited nestmates. Small dead prey do not lead to interference, but is taken by the first worker that finds it.
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  • 99
    Electronic Resource
    Electronic Resource
    Springer
    Insectes sociaux 41 (1994), S. 99-110 
    ISSN: 1420-9098
    Keywords: Nesting biology ; nest re-use ; Eulaema nigrita ; Euglossini ; Apidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The nesting behavior of the euglossine beeEulaema nigrita was observed in the laboratory after being transferred from three nests to observation boxes. Nests were re-used by successive generations with more than one female working in each re-use process. Associated females were always of the same generation. All females that shared a nest foraged for construction materials (mud, excrement and resin) and each constructed, provisioned and oviposited in her own cells. The number of cells constructed by each female ranged from one to 23. Females stayed in the nests for periods ranging from 15 to 59 days during the hot and wet season and from five to 78 days during the cool and dry season. The egg-to-adult period was related to climatic conditions, and in all re-use processes it was longer than the time of residence of the females in the nests. The meloid beetleMeloetyphlus attacephalus was the only nest parasite. Due to the attack method employed by this parasite, the presence of more than one female in the nest did not result in improved nest defense.
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  • 100
    Electronic Resource
    Electronic Resource
    Springer
    Insectes sociaux 5 (1958), S. 9-30 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
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