The effect of excesses and deficiencies in amino acids on the feeding behaviour of the common brushtail possum ( Trichosurus vulpecula )

dc.contributor.authorDe Gabriel, Jane
dc.contributor.authorFoley, William
dc.contributor.authorWallis, Ian
dc.date.accessioned2015-12-13T22:24:32Z
dc.date.issued2002
dc.date.updated2015-12-11T08:07:16Z
dc.description.abstractIn this study of the amino acid nutrition of a marsupial we tested three hypotheses: (a) that brushtail possums eat less when diets contain excesses or deficiencies in essential amino acids, (b) that brushtail possums choose diets that do not contain amino acid excesses, and (c) that amino acid consumption is mediated partly by the 5HT3 receptor. Possums ate less when 0.2-1.0% methionine (wet matter) was added to the diet, but similar concentrations of lysine and threonine had little effect. However, when given a choice, possums always selected the basal ration over one with added lysine, methionine or threonine at concentrations between 0.05% and 0.9%. In contrast to the experiments with excess amino acids, possums did not eat less of a diet almost devoid of an essential amino acid. Instead, the possums ate less when their diets contained synthetic amino acids rather than similar amounts and proportions of amino acids as casein. Contrary to the third hypothesis, the 5HT3 receptor antagonist, ondansetron, did not affect feeding by possums given a diet containing 0.8% methionine, suggesting that post-ingestive feedback, via the 5HT3 receptor, does not regulate amino acid intake when diets contain amino acid excesses.
dc.identifier.issn0174-1578
dc.identifier.urihttp://hdl.handle.net/1885/72765
dc.publisherSpringer
dc.sourceJournal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology
dc.subjectKeywords: amino acid; lysine; methionine; ondansetron; serotonin 3 receptor; serotonin antagonist; serotonin receptor; threonine; adaptation; animal; article; body weight; diet; dose response; drug effect; feeding behavior; male; metabolism; opossum; osmolarity; ph Feeding; Lysine; Marsupial; Methionine; Ondansetron; Threonine
dc.titleThe effect of excesses and deficiencies in amino acids on the feeding behaviour of the common brushtail possum ( Trichosurus vulpecula )
dc.typeJournal article
local.bibliographicCitation.lastpage617
local.bibliographicCitation.startpage607
local.contributor.affiliationDe Gabriel, Jane, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationFoley, William, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationWallis, Ian, College of Medicine, Biology and Environment, ANU
local.contributor.authoremailu9616309@anu.edu.au
local.contributor.authoruidDe Gabriel, Jane, u9808039
local.contributor.authoruidFoley, William, u9616309
local.contributor.authoruidWallis, Ian, u9802366
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.absfor050299 - Environmental Science and Management not elsewhere classified
local.identifier.ariespublicationMigratedxPub3419
local.identifier.citationvolume172
local.identifier.doi10.1007/s00360-002-0289-5
local.identifier.scopusID2-s2.0-0036922479
local.identifier.uidSubmittedByMigrated
local.type.statusPublished Version

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