Document Detail

Do food protein and carbohydrate content influence the pattern of feeding and the tendency to explore of forest tent caterpillars?
MedLine Citation:
PMID:  17689556     Owner:  NLM     Status:  MEDLINE    
This study examines whether the ratio of protein to carbohydrate affects the timing of meals and the propensity to explore of forest tent caterpillars (Malacosoma disstria). The behavior of fourth instar caterpillars was observed on three semi-defined artificial diets varying in protein (p)-carbohydrate (c) ratio. These diets were (a) p14:c28, (b) p28:c14, and (c) p35:c7. The probability of initiating feeding at first contact with the food and the duration of the first feeding event did not vary across diets, suggesting not much difference in phagostimulatory power. There was also no difference in the total time spent eating, at rest and in motion between diets. However, the timing and duration of meals varied significantly; more short meals were observed on the carbohydrate-biased diet. The duration of pauses between meals also increased with food protein content. Furthermore, caterpillars on the carbohydrate-biased diet were more likely to leave the trail leading to the known food source and to discover a second food source, suggesting that protein deprivation promotes exploration. These findings shed insight into the physiological responses to protein and carbohydrate ingestion and demonstrate how post-ingestive effects can favor consumption of foods containing protein without invoking an explicit mechanism of independent nutrient regulation, but simply by influencing the pattern of feeding and the propensity to explore.
Nadia Colasurdo; Audrey Dussutour; Emma Despland
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-06-17
Journal Detail:
Title:  Journal of insect physiology     Volume:  53     ISSN:  0022-1910     ISO Abbreviation:  J. Insect Physiol.     Publication Date:  2007 Nov 
Date Detail:
Created Date:  2007-11-02     Completed Date:  2008-01-25     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2985080R     Medline TA:  J Insect Physiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  1160-8     Citation Subset:  IM    
Biology Department, Concordia University, 7141 Sherbrooke W, Montreal, Que., Canada H4B 1R6.
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MeSH Terms
Dietary Carbohydrates*
Dietary Proteins*
Exploratory Behavior / physiology*
Feeding Behavior / physiology*
Moths / physiology*
Time Factors
Reg. No./Substance:
0/Dietary Carbohydrates; 0/Dietary Proteins

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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