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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of organic chemistry 53 (1988), S. 4123-4124 
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Entomology 30 (1985), S. 319-343 
    ISSN: 0066-4170
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Entomologia experimentalis et applicata 38 (1985), S. 215-220 
    ISSN: 1570-7458
    Keywords: Nemeritis canescens ; Hymenoptera ; Ichneumonidae ; Ephestia kuehniella ; Dufour's gland ; marker pheromone ; discrimination ; superparasitism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Des expériences sur le comportement de N. canescens ont montré que les sécrétions de la glande de Dufour sont utilisées comme phéromone de marquage pouvant affecter le comportement des autres hyménoptères face aux chenilles contaminées. Ce maqueur externe est produit à partir des sécrétions de la glande de Dufour, il a un effet dissuasif qui dure environ 32 heures après son émission. La séquence des actes comportementaux de Nemeritis montre un accroissement significatif de réactions de ‘fuite’ et d'‘évitement’ face à des chenilles d'Ephestia traitées superficiellement avec du contenu des glandes de Dufour. Cet article prouve pour la première fois que Nemeritis réagit aussi bien à des marqueurs externes qu'internes. Un comportement analogue vis à vis de papier filtre imprégné du contenu des glandes de Dufour et de son constituant hénéicosane constitue une preuve que le contenu de la glande influe sur le comportement de l'hymenoptère et ainsi lui évite de superparasiter ses hôtes.
    Notes: Abstract Behavioural experiments with Nemeritis canescens Grav. have demonstrated that the secretions from its Dufour's gland are used as a marker pheromone which can affect the behaviour of other wasps towards host caterpillars bearing it. The external marker is produced within the complex of secretions from the Dufour's gland and has oviposition deterrent effect which lasts approximately 32 h after deposition. The sequence of behaviour patterns shown by individual Nemeritis is described and shows a significant increase in ‘escape’ and ‘avoidance’ reactions towards Ephestia caterpillars treated topically with the Dufour's gland contents. This paper presents evidence for the first time to indicate that Nemeritis reacts to an external marker as well as to an internal one. Similar behaviour towards filter paper treated topically with contents of whole Dufour's gland and its component heneicosane contribute evidence for the conclusion that the gland contents influence the wasp's behaviour and hence its avoidance of superparasitism of its host.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Behavioral ecology and sociobiology 23 (1988), S. 341-355 
    ISSN: 1432-0762
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The contribution to maternity of workers and female sexuals over time by queens in six multiple-queen laboratory colonies of Solenopsis invicta was directly assessed by use of enzyme genetic markers. Queens contributed more equally to the worker pool than to the pool of sexuals in virtually all samples (Fig. 1), and individuals producing a substantial proportion of the workers often had low or no representation of their daughters in the pool of sexuals. Signficant disparity among queens in their relative production of sexual daughters was often evident, with dominance in production of sexuals by a given queen commonly occurring in association with a pronounced loss of weight followed shortly by her death. The results suggest that significant variability in short-as well as long-term reproductive success may occur among the distantly related queens associating in natural polygyne S. invicta nests. Variance in apportionment of maternity of sexuals did not appear to be simply related to varying levels of fecundity, suggesting that the common presumption that reproductive success can be equated with fecundity in polygyne social Hymenoptera may not be well founded. The observed variance also did not appear to result from a simple mechanism of kin recognition and discrimination by workers in the process of brood rearing. Rather, this variance may have largely resulted from either, 1) recognition of certain queens and their progeny coupled with preferential sexualization of these immatures by nurse workers, or, 2) queen biasing of eggs toward development as sexuals. The frequent association of weight loss and death of mother queens with high levels of sexual daughter production may be best explained by the latter mechanism.
    Type of Medium: Electronic Resource
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