Dietary protein and carbohydrate affect feeding behavior and metabolic regulation in hummingbirds (Melanotrochilus fuscus)

The objective of this work was to link hummingbird feeding behavior with metabolic regulation and in addition to assess whether dietary composition would affect entrance into torpor. Hummingbirds were fed a combination of diets with contrasting amounts of protein and carbohydrate. The diets were com...

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Autores principales:	ZANOTTO,FLAVIA P., BICUDO,J.E.P.W.
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2005
Materias:	hummingbird feeding carbohydrate and protein interaction unbalanced diet feeding behavior torpor
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000200012
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spelling	oai:scielo:S0716-078X20050002000122014-08-12Dietary protein and carbohydrate affect feeding behavior and metabolic regulation in hummingbirds (Melanotrochilus fuscus)ZANOTTO,FLAVIA P.BICUDO,J.E.P.W. hummingbird feeding carbohydrate and protein interaction unbalanced diet feeding behavior torpor The objective of this work was to link hummingbird feeding behavior with metabolic regulation and in addition to assess whether dietary composition would affect entrance into torpor. Hummingbirds were fed a combination of diets with contrasting amounts of protein and carbohydrate. The diets were composed of the following: 2.4 % protein (P) - 12 % sucrose (S) and 0.8 % protein (P) - 36 % sucrose (S). The main findings showed that periods of feeding on each of the diets could be distinguished as separate bouts or feeding events. Hummingbirds presented to high protein-low carbohydrate diets (2.4P-12S) ingested a larger volume of diet, fed for longer (both around 1.7x) and increased the interval between feedings compared with hummingbirds fed diets 0.8P-36S. Physiological regulation between feeding events, on the other hand, was achieved through an increase in metabolic rate for low protein-high sugar diets (0.8P-36S). This response could probably be related to high sucrose assimilation rates through the digestive system of hummingbirds, a process already known to be very efficient in these birds. Additionally, there was a steeper decrease in oxygen consumption for hummingbirds fed diets 2.4P-12S during fasting and a suggestion of a higher torpor incidence in birds fed these dietsinfo:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.78 n.2 20052005-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000200012en10.4067/S0716-078X2005000200012
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	hummingbird feeding carbohydrate and protein interaction unbalanced diet feeding behavior torpor
spellingShingle	hummingbird feeding carbohydrate and protein interaction unbalanced diet feeding behavior torpor ZANOTTO,FLAVIA P. BICUDO,J.E.P.W. Dietary protein and carbohydrate affect feeding behavior and metabolic regulation in hummingbirds (Melanotrochilus fuscus)
description	The objective of this work was to link hummingbird feeding behavior with metabolic regulation and in addition to assess whether dietary composition would affect entrance into torpor. Hummingbirds were fed a combination of diets with contrasting amounts of protein and carbohydrate. The diets were composed of the following: 2.4 % protein (P) - 12 % sucrose (S) and 0.8 % protein (P) - 36 % sucrose (S). The main findings showed that periods of feeding on each of the diets could be distinguished as separate bouts or feeding events. Hummingbirds presented to high protein-low carbohydrate diets (2.4P-12S) ingested a larger volume of diet, fed for longer (both around 1.7x) and increased the interval between feedings compared with hummingbirds fed diets 0.8P-36S. Physiological regulation between feeding events, on the other hand, was achieved through an increase in metabolic rate for low protein-high sugar diets (0.8P-36S). This response could probably be related to high sucrose assimilation rates through the digestive system of hummingbirds, a process already known to be very efficient in these birds. Additionally, there was a steeper decrease in oxygen consumption for hummingbirds fed diets 2.4P-12S during fasting and a suggestion of a higher torpor incidence in birds fed these diets
author	ZANOTTO,FLAVIA P. BICUDO,J.E.P.W.
author_facet	ZANOTTO,FLAVIA P. BICUDO,J.E.P.W.
author_sort	ZANOTTO,FLAVIA P.
title	Dietary protein and carbohydrate affect feeding behavior and metabolic regulation in hummingbirds (Melanotrochilus fuscus)
title_short	Dietary protein and carbohydrate affect feeding behavior and metabolic regulation in hummingbirds (Melanotrochilus fuscus)
title_full	Dietary protein and carbohydrate affect feeding behavior and metabolic regulation in hummingbirds (Melanotrochilus fuscus)
title_fullStr	Dietary protein and carbohydrate affect feeding behavior and metabolic regulation in hummingbirds (Melanotrochilus fuscus)
title_full_unstemmed	Dietary protein and carbohydrate affect feeding behavior and metabolic regulation in hummingbirds (Melanotrochilus fuscus)
title_sort	dietary protein and carbohydrate affect feeding behavior and metabolic regulation in hummingbirds (melanotrochilus fuscus)
publisher	Sociedad de Biología de Chile
publishDate	2005
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000200012
work_keys_str_mv	AT zanottoflaviap dietaryproteinandcarbohydrateaffectfeedingbehaviorandmetabolicregulationinhummingbirdsmelanotrochilusfuscus AT bicudojepw dietaryproteinandcarbohydrateaffectfeedingbehaviorandmetabolicregulationinhummingbirdsmelanotrochilusfuscus
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Dietary protein and carbohydrate affect feeding behavior and metabolic regulation in hummingbirds (Melanotrochilus fuscus)

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