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  • 1995-1999  (2)
  • Iridomyrmex humilis  (1)
  • Schistocerca  (1)
  • Sphingidae
  • 1
    Electronic Resource
    Electronic Resource
    Foraging by a Generalist Grasshopper: The Distance Between Food Resources Influences Diet Mixing and Growth Rate (Orthoptera: Acrididae) (1997)
    Springer
    Journal of insect behavior 10 (1997), S. 829-840 
    Details
    ISSN: 1572-8889
    Keywords: foraging ; grasshopper ; predation risk ; dietary mixing ; Schistocerca ; patch size
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The grasshopper, Schistocerca americana, grew better on a mixture of cotton and kale than on either alone. When the two foods were placed in close proximity, growth rates were similar among individuals, but when they were 20 cm apart growth rates were extremely variable among individuals. Behavioral analyses showed that distance influenced the dietary mixing behavior of individuals. Foods close together were sampled more often and there were more meals that included both food types. When foods were distant, individuals tended to stay for relatively long periods at one or the other; when on cotton, this resulted in more feeding on cotton, which was an inferior food. Individuals varied in the extent to which they were constrained by the distance between the two foods. Those that moved between the foods less and therefore mixed less seemed to grow less well, suggesting the possibility of a trade-off between active foraging and behavior associated with predator avoidance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/B:JOIR.0000010416.54387.44
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The effect of plant chemistry on the acceptability of caterpillar prey to the argentine antIridomyrmex humilils (Hymenoptera: Formicidae) (1995)
    Springer
    Journal of insect behavior 8 (1995), S. 579-593 
    Details
    ISSN: 1572-8889
    Keywords: Iridomyrmex humilis ; predation ; chemical defense ; nicotine ; Lepidoptera ; plant/insect interactions ; herbivore
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Experiments were performed to test the acceptability of two palatable, cryptic caterpillars, the tobacco hornworm,Manduca sexta, and the cabbage looper,Trichoplusia ni, reared on different diets, to the Argentine ant,Iridomyrmex humilis. Ants preferred larvae reared on artificial diet, groundcherry, or cowpea to tobacco-reared larvae. Ants also preferred larvae reared on artificial diet without nicotine to larvae reared on diet containing nicotine (5% dry wt). Experiments were also performed to test the response of ants to larval extracts and chemicals applied to the surface of palatable prey. Ants did not respond differently to larvae of the potato tuber moth,Phthorimaea operculella, treated with larval extracts or regurgitate from tobacco-reared larvae compared to artificialdiet-reared larvae, but ants were deterred byP. operculella larvae treated with nicotine compared to untreated larvae. The results of this study indicate that caterpillars can derive at least some degree of chemical protection from their food plant without sequestering and storing plant compounds and without the development of elaborate aposematic characteristics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01997232
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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