QUICK SEARCH:   [advanced] Author: Keyword(s):
Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents

This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Edgecomb, R. S. Articles by Schneiderman, A. M. Search for Related Content PubMed PubMed Citation Articles by Edgecomb, R. S. Articles by Schneiderman, A. M.

Journal of Experimental Biology, Vol 197, Issue 1 215-235, Copyright © 1994 by Company of Biologists

JOURNAL ARTICLES

Regulation of feeding behavior in adult Drosophila melanogaster varies with feeding regime and nutritional state

RS Edgecomb, CE Harth and AM Schneiderman
Section of Neurobiology and Behavior, Cornell University, Ithaca, NY 14853-2702.

The regulation of feeding behavior in adult Drosophila melanogaster includes such elements as ingestion responsiveness, volume ingested in a single meal, food storage in the crop and rate of defecation. Our results suggest that feeding behavior varies in a manner dependent on feeding regime (food-deprived or ad-libitum-fed) and nutritional state. Fed flies that are subsequently food-deprived become increasingly more responsive to food stimuli over time and, when offered 1% agar diets containing different concentrations of sucrose, ingest greater amounts of diets that have higher sucrose concentrations. When fed ad libitum for 72 h on these same diets, D. melanogaster maintained much smaller crops on average than food-deprived flies fed a single meal. Additionally, ad-libitum-fed flies are grouped into two categories depending on the concentration of sucrose in the diet. Flies fed for 72 h on 1% agar diets having 50 mmoll-1 sucrose or more are not affected by the concentration of sucrose in the diet, while flies fed on diets of 15 or 25 mmoll-1 sucrose increase ingestion responsiveness, crop size and the rate of defecation with decreasing concentrations of sucrose in the diet. Flies fed on even lower sucrose concentrations (5 or 10 mmoll-1 sucrose) for 27-72 h exhibit both a shift over time to larger crop sizes and increased mortality over those of flies fed 15 mmoll-1 sucrose. These data suggest that flies fed ad libitum are capable of modulating their feeding behavior in response to their nutritional state.

This article has been cited by other articles:

				T. M. Bass, R. C. Grandison, R. Wong, P. Martinez, L. Partridge, and M. D. W. Piper Optimization of Dietary Restriction Protocols in Drosophila J. Gerontol. A Biol. Sci. Med. Sci., October 1, 2007; 62(10): 1071 - 1081. [Abstract] [Full Text] [PDF]

				S. J. Simpson and D. Raubenheimer Caloric Restriction and Aging Revisited: The Need for a Geometric Analysis of the Nutritional Bases of Aging J. Gerontol. A Biol. Sci. Med. Sci., July 1, 2007; 62(7): 707 - 713. [Abstract] [Full Text] [PDF]

				W. W. Ja, G. B. Carvalho, E. M. Mak, N. N. de la Rosa, A. Y. Fang, J. C. Liong, T. Brummel, and S. Benzer Prandiology of Drosophila and the CAFE assay PNAS, May 15, 2007; 104(20): 8253 - 8256. [Abstract] [Full Text] [PDF]

				N. Meunier, Y. H. Belgacem, and J.-R. Martin Regulation of feeding behaviour and locomotor activity by takeout in Drosophila J. Exp. Biol., April 15, 2007; 210(8): 1424 - 1434. [Abstract] [Full Text] [PDF]

				K.-S. Lee, K.-H. You, J.-K. Choo, Y.-M. Han, and K. Yu Drosophila Short Neuropeptide F Regulates Food Intake and Body Size J. Biol. Chem., December 3, 2004; 279(49): 50781 - 50789. [Abstract] [Full Text] [PDF]