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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 44 (1988), S. 720-722 
    ISSN: 1420-9071
    Keywords: Spider ; molting ; coloniality ; Araneidae ; synchronization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The colonial orb-weaving spider,Eriophora bistriata, coordinates molting cycles through communication. Colonies with differing molting cycles synchronize when combined. Intercycle intervals depend upon food availability. The possible coordination of this synchrony by chemical communication among spiders is discussed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 75 (1988), S. 208-209 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1573-8248
    Keywords: Cotesia ; Ascia ; parasitoid ; Brazil ; cabbage ; behavior ; parasitism ; Cotesia ; Ascia ; parasitoïde ; Brésil ; chou ; comportement ; parasitisme
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Résumé Divers aspects du parasitisme parCotesia ayerzai des chenilles d'Ascia monuste orseis ont été étudiés au laboratoire par des essais de choix. La durée de ponte, comme le nombre d'œufs déposés, sont extrêmement variables d'une femelle à l'autre. Pour simuler la dispersion du parasitoïde ou une faible densité d'hôtes, nous isolons les femelles durant une heure après l'exposition initiale et comparons nos essais avec les femelles qui n'ont pas été isolées. Il n'y a aucune différence entre ces groupes: (1) dans le nombre d'œufs déposés par stade hôte — (2) dans la probabilité de rencontre de l'hôtes — (3) dans l'acceptation de l'hôte et (4) dans la probabilité d'un parasitisme spécifique d'un stade. Cependant les femelles emprisonnées ne rejetaient pas les hôtes après des insertions de la tarière dans une plus grande proportion.
    Notes: Abstract Various aspects of the parasitims of caterpillars ofAscia monuste orseis byCotesia ayerzai, were studied in laboratory choice tests. Individual ♂♂ were found to be extremely variable in ovipositional duration, as well as in the number of eggs oviposited. To simulate parasitoid dispersal, or low host density, we isolated ♂♂ for 60 min following initial exposure and compared our tests with ♂♂ which had not been isolated. No differences in (1) the number of eggs oviposited per host instar; (2) the conditional probability of host encounter; (3) host acceptance; and (4) the conditional probability of instar specific parasitism were found between these groups. Held ♂♂ did, however, reject hosts after ovipositor insertions in a higher proportion.
    Type of Medium: Electronic Resource
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