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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 |
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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] |
doi_str_mv | 10.1023/A:1007805814388 |
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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. 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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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