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  • 1
    Electronic Resource
    Electronic Resource
    Constructing nutrient budgets (1995)
    Springer
    Entomologia experimentalis et applicata 77 (1995), S. 99-104 
    Details
    ISSN: 1570-7458
    Keywords: nutrient budgets ; nutrient allocation ; life history
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We present a formalised, yet flexible, scheme for classifying and symbolising the components of nutrient budgets. The scheme distinguishes hierarchically both among components of the ingesta and among the various sinks to which they are allocated. The primary terms in the budget are distinguished according to either methodological criteria (whether in a given time period they are retained by the animal or dissociated from the body) or functional criteria (whether they contribute to fitness). In both methodological and functional classifications, the primary terms of the budget may be progressively expanded to represent with increasing resolution nutrient allocation. The interplay between the various components of the ingesta and their subsequent allocation may be considered simultaneously using a two-dimensional nutritional matrix.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02383023
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Meeting nutrient requirements: the roles of power and efficiency (1996)
    Springer
    Entomologia experimentalis et applicata 80 (1996), S. 65-68 
    Details
    ISSN: 1570-7458
    Keywords: nutritional models ; nutrient budgets ; feeding patterns ; nutritional efficiency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Conclusions We have attempted to illustrate the importance of nutrient transfer functions and their key quantitative parameters, power and efficiency. While this brief account has focused on one aspect of nutritional behaviour, the duration of intermeal intervals, the models are equally useful for understanding other components of feeding behaviour such as meal size and food switching. Like-wise, they provide a framework for formulating quantitative predictions about the dynamics of the physiological processes involved in digestion, absorption and the utilisation of food. These aspects are dealt with more fully elsewhere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00194725
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    Paper (German National Licenses)
    Fulltext
  • 3
    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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