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  • Coccinellidae  (3)
  • Carabidae  (2)
  • sexual selection  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Paternal allocation of sequestered plant pyrrolizidine alkaloid to eggs in the danaine butterfly,Danaus gilippus (1989)
    Springer
    Cellular and molecular life sciences 45 (1989), S. 896-898 
    Details
    ISSN: 1420-9071
    Keywords: Lepidoptera ; pyrrolizidine alkaloid ; pheromone ; sexual selection ; nuptial gift ; egg defense
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Pyrrolizidine alkaloid sequestered by adult maleDanaus gilippus from plants is transferred in large measure to the female at mating, and by the female to the eggs. The eggs, presumably, are protected as a result. The male's courtship pheromone, danaidone, derived from the sequestered alkaloid, may function to advertise the male's alkaloid-donating capacity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01954068
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Defensive use of an acquired substance (carminic acid) by predaceous insect larvae (1994)
    Springer
    Cellular and molecular life sciences 50 (1994), S. 610-615 
    Details
    ISSN: 1420-9071
    Keywords: Quinone ; Coccidae ; Coccinellidae ; Chamaemyiidae ; Pyralidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Larvae of two insects, a coccinellid beetle (Hyperaspis trifurcata) and a chamaemyiid fly (Leucopis sp.), feed on cochineal insects and appropriate their prey's defensive chemical, carminic acid, for protective purposes of their own.H. trifurcata discharges the chemical with droplets of blood (hemolymph) that it emits when disturbed;Leucopis sp. ejects the compound with rectal fluid. Ants are thwarted by these defenses, which are compared with the previously-described defense of a pyralid caterpillar (Laetilia coccidivora) that disgorges carminic acid-laden crop fluid. The defensive fluid of all three larvae contains carminic acid at concentrations spanning a range (0.2–6.2%) proven deterrent to ants. Many insects are known to appropriate defensive substances from plants. Insects that acquire defensive chemicals from animal sources may be relatively rare.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01921733
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Tocopheryl acetates from the pupal exocrine secretion of the squash beetle,Epilachna borealis (Coccinellidae) (1996)
    Springer
    Cellular and molecular life sciences 52 (1996), S. 616-620 
    Details
    ISSN: 1420-9071
    Keywords: Vitamin E acetate ; tocopherol ; beetle ; Coccinellidae ; defensive secretion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The oily droplets on the pupal integumental hairs of the squash beetleEpilachna borealis contain a mixture of α-, β-, γ-, and δ-tocopheryl acetates as major constituents. In addition, the secretion contains a number of minor components that appear to be dehydrocongeners of the major components. This is the first report of the occurrence of acetate esters of any tocopherol in nature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01969741
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Sexual dimorphism in the defensive secretion of a carabid beetle (1991)
    Springer
    Cellular and molecular life sciences 47 (1991), S. 296-299 
    Details
    ISSN: 1420-9071
    Keywords: Carabidae ; defensive secretion ; sexual dimorphism ; carboxylic acids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The defensive secretions of male and femaleOodes americanus display striking qualitative differences. Altogether 13 carboxylic acids were identified in the secretions of the two sexes. Methacrylic, crotonic, and tiglic acids are produced exclusively by the female; the male lacks these unsaturated components, but produces their saturated analogs. 2-Methylbutyric acid is a major component produced by both sexes. Shared components also include hexanoic, (E)-2-hexenoic, benzoic, and (E)-2-octenoic acid, of which the latter two had not previously been reported from carabid beetles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01958165
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Courtship pheromone production and body size as correlates of larval diet in males of the arctiid moth,Utetheisa ornatrix (1990)
    Springer
    Journal of chemical ecology 16 (1990), S. 543-552 
    Details
    ISSN: 1573-1561
    Keywords: Courtship pheromone ; Utetheisa ornatrix ; Lepidoptera ; Arctiidae ; sexual selection ; hydroxydanaidal ; pyrrolizidine alkaloid ; Crotalaria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Hydroxydanaidal, the corematal courtship pheromone of maleUtetheisa ornatrix, shows pronounced quantitative variation in natural populations of the moth. Males that, as larvae, fed on seed-bearing rather than immature food plants (Crotalaria spectabilis orC. mucronata) produce higher levels of hydroxydanaidal. Such males also have higher systemic loads of pyrrolizidine alkaloid, the known metabolic precursor of hydroxydanaidal, whichUtetheisa sequester from their larval diet and which is concentrated in the seeds ofCrotalaria. Males raised on seed-bearing plants also achieve higher adult weight. In the context of sexual selection, therefore, femaleUtetheisa could, through assessment of male hydroxydanaidal levels, gauge both the alkaloid content and body weight of their suitors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01021785
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Antiinsectan Activity of Epilachnene, a Defensive Alkaloid from Pupae of Mexican Bean Beetles (Epilachna varivestis) (2000)
    Springer
    Journal of chemical ecology 26 (2000), S. 391-397 
    Details
    ISSN: 1573-1561
    Keywords: chemical defense ; Coccinellidae ; alkaloid ; azamacrolide ; bioassay ; feeding deterrent ; irritant
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Epilachnene [(5Z)-11-propyl-12-azacyclotetradec-5-en-14-olide], the principal component of the secretion of the pupal defensive hairs of the Mexican bean beetle (Epilachna varivestis), has antiinsectan activity. Both the R enantiomer of epilachnene, and the S enantiomer (the natural configuration of the compound), proved deterrent in a feeding bioassay with a predaceous coccinellid beetle (Harmonia axyridis). Moreover, both enantiomers proved active in a topical irritancy test with a cockroach (Periplaneta americana).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005457321701
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Defensive secretion of a carabid beetle,Helluomorphoides clairvillei (1992)
    Springer
    Journal of chemical ecology 18 (1992), S. 489-498 
    Details
    ISSN: 1573-1561
    Keywords: Coleoptera ; Carabidae ; beetles ; Helluomorphoides clairvillei ; defensive secretion ; formic acid ; acetates ; formates ; hydrocarbons
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The defensive spray of a single female of the rare carabid beetle,Helluomorphoides clairvillei (subfamily Carabinae, supertribe Lebiitae, tribe Helluonini). was found to contain a mixture of compounds, including carboxylic acids (formic, acetic), aliphatic esters (principally nonyl acetate), and hydrocarbons (principally decane). In a single series of discharges, the beetle ejected a total of about 1% of its body weight as formic acid (1.1 mg). Our findings demonstrate that characterization of secretory components from even minimal samples of secretion should be possible in many cases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00994247
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    Paper (German National Licenses)
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