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

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dc.contributor.authorZanotto F.P.
dc.contributor.authorBicudo J.E.P.W.
dc.date.accessioned2024-03-13T01:44:27Z
dc.date.available2024-03-13T01:44:27Z
dc.date.issued2005
dc.description.abstractThe 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.
dc.description.firstpage281
dc.description.issuenumber2
dc.description.lastpage294
dc.description.volume78
dc.identifier.doi10.4067/S0716-078X2005000200012
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/37898
dc.relation.ispartofRevista Chilena de Historia Natural
dc.rightsAcesso Aberto
dc.subject.otherlanguageCarbohydrate and protein interaction
dc.subject.otherlanguageFeeding behavior
dc.subject.otherlanguageHummingbird feeding
dc.subject.otherlanguageTorpor
dc.subject.otherlanguageUnbalanced diet
dc.titleDietary protein and carbohydrate affect feeding behavior and metabolic regulation in hummingbirds (Melanotrochilus fuscus)
dc.typeArtigo
local.scopus.citations3
local.scopus.eid2-s2.0-23144462820
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=23144462820&origin=inward
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