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Diet balancing in the cockroach Rhyparobia madera : Does serotonin regulate this behavior?

Animals, including insects, have the ability to self-select an optimal diet from a choice of two or more incomplete diets that lack an essential nutrient. This paper demonstrates that nymphs of the cockroach Rhyparobia madera also have this ability. The nymphs chose a protein:carbohydrate (P:C) rati...

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Published in:Journal of insect behavior 2001, Vol.14 (1), p.99-111
Main Author: COHEN, Randy W
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Language:English
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description Animals, including insects, have the ability to self-select an optimal diet from a choice of two or more incomplete diets that lack an essential nutrient. This paper demonstrates that nymphs of the cockroach Rhyparobia madera also have this ability. The nymphs chose a protein:carbohydrate (P:C) ratio of approximately 25:75 when faced with a choice between one cube of protein (casein) and another of carbohydrate (sucrose). This self-selected ratio was shown to promote growth as well or better than other diets tested. When given a wide range of P:C choices, the R. madera nymphs consistently selected a P:C ratio of approximately 25:75, suggesting that they have the ability to diet-balance. Finally, injections of various serotonergic drugs into self-selecting nymphs influenced their choice of diets. Serotonin promoted a decrease in carbohydrate feeding, while injection of the antagonist α-methyltryptophan caused the nymphs to overfeed on carbohydrate. The results suggest that serotonin may help alter the carbohydrate feeding response in cockroaches.[PUBLICATION ABSTRACT]
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subjects Animal ethology
Biological and medical sciences
Diet
Fundamental and applied biological sciences. Psychology
Protozoa. Invertebrata
Psychology. Psychoanalysis. Psychiatry
Serotonin
title Diet balancing in the cockroach Rhyparobia madera : Does serotonin regulate this behavior?
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