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  • 1990-1994  (3)
  • learning  (2)
  • Hypera brunneipennis  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    Relationship between deterrence and toxicity of plant secondary compounds for the alfalfa weevil Hypera brunneipennis (1992)
    Springer
    Entomologia experimentalis et applicata 64 (1992), S. 289-292 
    Details
    ISSN: 1570-7458
    Schlagwort(e): Deterrence ; oral dosing ; toxicity ; diet breadth ; Hypera brunneipennis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract A variety of plant secondary compounds, several of which are quite widespread in nature were tested for their deterrence to the specialist coleopteran Hypera brunneipennis (Boheman) in short-term behavioral assays. The compounds were nicotine, quinine, sparteine, hordenine, linamarin, amygdalin, sinigrin, morin, juglone, chlorogenic acid, digitonin, mimosine, diosgenin, rutin and ursolic acid. Nine of these were then tested for their post-ingestional effects over one to two weeks of adult life, using fecundity as a measure of the effects. In only one case was there any indication of a detrimental effect or any trend suggesting one. The evolutionary implications of these findings are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00341092
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Dietary mixing in grasshoppers: switching induced by nutritional imbalances in foods (1991)
    Springer
    Entomologia experimentalis et applicata 61 (1991), S. 247-253 
    Details
    ISSN: 1570-7458
    Schlagwort(e): Schistocerca ; dietary mixing ; compensatory feeding ; learning ; flavors
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Dietary mixing by nymphs of Schistocerca americana was studied in the laboratory using artificial diet cakes. Individuals were given either two different inadequate but complementary diet cakes or two adequate and identical ones. When unique flavors (coumarin or NHT) were added to the diet cakes, insects given the inadequate diet treatment switched between cakes more than insects exposed to the adequate diets. This was not the case when no identifying flavors were added.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00187728
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  • 3
    Digitale Medien
    Digitale Medien
    Dietary mixing in grasshoppers: Changes in acceptability of different plant secondary compounds associated with low levels of dietary protein (Orthoptera: Acrididae) (1991)
    Springer
    Journal of insect behavior 4 (1991), S. 545-556 
    Details
    ISSN: 1572-8889
    Schlagwort(e): Schistocerca ; grasshopper ; learning ; aversion ; novelty ; polyphagy ; dietary mixing
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Schistocerca americanasixth-instar nymphs were examined for a change in diet acceptance, in which insects experiencing an unfavorable diet subsequently become predisposed to eat relatively less of that diet and more of diets with a novel flavor than they would had they previously fed on a more adequate diet. Insects were pretreated for 4 h on either low-protein (2 % wet wt) or higherprotein (4%) artificial diets flavored with a plant secondary compound (tomatine or rutin). They were then offered, in choice or no-choice tests, the lowprotein diet with the familiar or a novel (tomatine, rutin, or NHT) flavor. When tomatine was the familiar and rutin the novel flavor in a no-choice test, the insects previously fed low-protein diets took relatively long meals on the novel and relatively short meals on the familiar diets compared with the insects that had previously eaten higher-protein diets. A similar, but in this case considerably less pronounced and statistically nonsignificant, pattern existed in the reciprocal design experiment in which rutin was the familiar and tomatine the novel flavor. Similarly, insects fed low-protein diets flavored with rutin subsequently showed an increased relative preference for the novel flavor (NHT) in a choice test, compared with the high protein-pretreated insects. It is concluded that insects fed protein-deficient diets may subsequently show a preference for novel foods through different mechanisms, the importance of which may differ in different circumstances.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01048069
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