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  • 1
    Electronic Resource
    Electronic Resource
    Feeding behaviour, sensory physiology and nutrient feedback: a unifying model (1996)
    Springer
    Entomologia experimentalis et applicata 80 (1996), S. 55-64 
    Details
    ISSN: 1570-7458
    Keywords: taste ; gustation ; chemoreception ; feeding behaviour ; nutrition ; insect ; locust ; caterpillar
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The design features of gustatory systems are considered in relation to the need for insect herbivores (or indeed any animal) to regulate their nutrient intake. The gustatory system (defined to include both peripheral and central components) should ideally be designed to reflect: (a) the average nutritional requirements of the insect during its various developmental stages; (b) the ‘predictably unpredictable’ variation in nutrient supply-demand which occurs about that average; and (c) the distribution and composition of foods available in the environment. A mathematical model is presented which makes detailed predictions regarding behavioural and electrophysiological responses to foods or simple solutions varying in nutrient content.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00194724
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Dietary selection in adultLocusta migratoria (1990)
    Springer
    Entomologia experimentalis et applicata 56 (1990), S. 47-60 
    Details
    ISSN: 1570-7458
    Keywords: Locusta migratoria ; locust ; self-selection ; feeding behaviour ; nutritional compensation ; adult development
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé La sélection des aliments a été suivie pendant les 15 premiers jours de vie imaginale des mâles et des femelles deLocusta migratoria L. Les insectes recevaient 2 régimes alimentaires, l'un contentant 10, 20 ou 28% de protéines, mais pas de carbohydrates assimilables, l'autre 10, 20 ou 28% de carbohydrates assimilables, mais pas de protéines. Les quantités consommées, le détail de la prise de nourriture, et les croissances somatique et reproductive ont été mesurés. Malheureusement, ces régimes artificiels n'ont pas permis le développement ovarien des femelles. Cependant, il y a des preuves convaincantes que les insectes ont contrôlé leur apport en protéines et en carbohydrates pendant la phase de croissance somatique par une sélection alimentaire et une modification de la consommation.
    Notes: Abstract Dietary selection was investigated during the first 15 days of adult life in male and femaleLocusta migratoria L. Insects were provided with two artificial diets, one containing 10, 20 or 28% protein but no digestible carbohydrate, the other 10, 20 or 28% digestible carbohydrate but no protein. Amounts eaten, detailed feeding patterns and somatic and reproductive growth were measured. Unfortunately the artificial diets did not support female reproductive development. Nevertheless, there was convincing evidence that insects regulated both protein and carbohydrate intake during the somatic growth phase by dietary selection and altered consumption.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00579614
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Volumetric feedback and the control of meal size in Schistocerca gregaria (1984)
    Springer
    Entomologia experimentalis et applicata 36 (1984), S. 279-286 
    Details
    ISSN: 1570-7458
    Keywords: Schistocerca gregaria ; feeding ; meal size ; volumetric feedback ; stretch receptors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé L'étude de la nature et du rôle des feed backs volumétriques dans la régulation de la taille du repas a été effectuée chez S. gregaria. Un feed back, originaire de la région antérieure du jabot, s'est révélé important et la dénervation a provoqué l'hyperphagie. Des feed backs supplémentaires ont été décelés dans des régions plus postérieures du jabot. De l'agar ou de la paraffine canulés dans la jabot moyen et postérieur ont provoqué une diminution de la taille du repas suivant. Ces effets sont supprimés avec la section de la corde nerveuse centrale avant le ganglion abdominal terminal. L'augmentation du volume sanguin par des injections de solution saline isotonique a aussi diminué la taille du repas suivant. Cet effet n'est pas transmis via des récepteurs de tension du jabot ou de la paroi du corps; des mécanismes envisageables sont discutés. Ces résultats avec S. gregaria sont comparés à ceux obtenus antérieurement avec Locusta migratoria.
    Notes: Abstract The role and nature of volumetric feedbacks in the regulation of meal size was investigated for Schistocerca gregaria. Feedback from the anterior region of the crop was found to be important and denervation led to hyperphagia. Additional feedbacks were found from more posterior gut regions. Cannulating agar or paraffin into the mid- and hindgut caused a decrease in the size of a following meal. This effect was removed by cutting the ventral nerve cord anterior to the terminal abdominal ganglion. Increasing the blood volume by injections of isotonic saline into the haemocoel was also found to decrease subsequent meal size. This effect was not mediated via the gut or body wall stretch receptors and possible mechanisms are discussed. The results for S. gregaria are compared with those obtained previously from Locusta migratoria.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00185659
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Haemolymph amino acid and sugar levels in locusts fed nutritionally unbalanced diets (1996)
    Springer
    Journal of comparative physiology 166 (1996), S. 223-229 
    Details
    ISSN: 1432-136X
    Keywords: Nutritional homeostasis ; Haemolymph amino acid ; Haemolymph sugar ; Unbalanced diets ; Locust ; Locusta migratoria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Aspects of pre- and post-ingestive compensation were investigated in locusts (Locusta migratoria) fed nutritionally unbalanced artificial diets containing 7% protein and 21% digestible carbohydrate (7:21) or 21% protein and 7% digestible carbohydrate (21:7). Feeding behaviour and haemolymph levels of amino acids and sugars were measured in locusts fed ad libitum on these diets. Locusts fed the high-protein diet had chronically elevated haemolymph levels of 15 out of 19 amino acids measured compared to locusts fed the low protein diet. However, haemolymph levels of lysine, alanine, aspartic acid and glutamic acid did not differ between diets, suggesting some specific regulatory mechanism for these amino acids. Haemolymph glucose and trehalose reflected levels of carbohydrate in the diets, being high in insects fed diet 7:21 relative to those given diet 21:7. These data are discussed in relation to the physiological and behavioural bases of nutritional homeostasis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00263986
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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