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  • Hymenoptera  (2)
  • Alternative behaviors  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Species-specificity in trail pheromones and Dufour's gland contents ofCamponotus atriceps andC. floridanus (Hymenoptera: Formicidae) (1996)
    Springer
    Chemoecology 7 (1996), S. 85-93 
    Details
    ISSN: 1423-0445
    Keywords: trail pheromone ; Dufour's gland ; hindgut ; carpenter ants ; Hymenoptera ; Formicidae ; Formicinae ; Camponotus atriceps ; Camponotus floridanus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary By means of gas chromatography, gas chromatographic coupled mass spectrometry, trail-following experiments and electrophysiological recordings from worker antennae, the major trail pheromone components from the hindgut of the formicine speciesCamponotus atriceps andC. floridanus were identified as 3,5-dimethyl-6-(1′-methylpropyl)-tetrahydropyran-2-one and nerolic acid, respectively. The Dufour's gland contents of both species, investigated by gas chromatographic coupled mass spectrometry, show significant differences.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01239485
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Male competition in Cardiocondyla ants (1998)
    Springer
    Behavioral ecology and sociobiology 42 (1998), S. 239-246 
    Details
    ISSN: 1432-0762
    Keywords: Key words Reproductive tactics ; Polymorphism ; Alternative behaviors ; Spermatogenesis ; Intranidal mating
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The two types of males in the ant genus Cardiocondyla differ remarkably in morphology and behavior. Ergatoid males are wingless fighters whose spermatogenesis continues throughout their entire adult lives and which therefore have an “unlimited” sperm supply. They attempt to kill all eclosing ergatoid rivals and thus to increase their share in copulations with the virgin queens reared in their nests. Winged males, on the other hand, are docile and emigrate from the nests a few days after eclosion, probably to mate with queens from other colonies. By this time, their testes have fully degenerated and all sperm is stored in the seminal vesicles. Before emigration, winged males may mate with virgin queens in their maternal nests, but they are nevertheless rarely attacked by ergatoid males. In the laboratory, the life expectancy of ergatoid males is only slightly higher than that of winged males, but because of the emigration of the latter the difference is likely to be more pronounced in the field. Both male morphs are capable of inseminating more than 35 virgin queens. However, winged males older than 14 days mate less often than ergatoid males of similar age, probably due to sperm depletion in later life. The spermathecae of queens inseminated by ergatoid males contained significantly more sperm than those of queens which mated with winged males. We discuss the evolution of intranidal mating and male polymorphism in ants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002650050435
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Constituents of mandibular and Dufour's glands of an australianPolyrhachis weaver ant (1985)
    Springer
    Journal of chemical ecology 11 (1985), S. 525-538 
    Details
    ISSN: 1573-1561
    Keywords: Polyrhachis (Cyrtomyrma) ?doddi ; Hymenoptera ; Formicidae ; mandibular glands ; Dufour's glands ; defensive secretions ; nitrile ; oximes ; mellein ; 6-methylhept-5-en-2-one ; benzaldehyde ; phenylacetaldehyde
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Worker ants ofPolyrhachis (Cyrtomyrma) ?doddi collectively discharge the secretions of their large mandibular glands when their nest is disturbed. The major glandular compounds of workers are 6-methylhept-5-en-2-one and phenylacetaldehyde oxime. Other components identified are mellein, 6-methylhept-5-en-2-one oxime, phenylacetonitrile, phenyiacetaldehyde, benzaldehyde, and several alkanes and alkenes. The mandibular gland secretions of queens differ from those of workers only quantitatively. Large queens have considerably more of most components, the small queens have much less of volatile components. There is a pronounced sexual difference: the major components of the male's secretions are octanoic acid and mellein, with geranic acid, 8-heptadecene, 2-methylbutanoic acid, and 9-nonadecene present in lesser amounts. Workers ofP. ?doddi also have unusually large Dufour's glands containing a large array of hydrocarbons, of which tridecane is the major component, but α-farnesene, pentadecane, and heptadecene are also present in large quantities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00989563
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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