Metabolic changes in Brycon cephalus (Teleostei, Characidae) during post-feeding and fasting

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dc.contributor.authorFigueiredo-Garutti, M. L.
dc.contributor.authorNavarro, I
dc.contributor.authorCapilla, E.
dc.contributor.authorSouza, RHS
dc.contributor.authorMoraes, G.
dc.contributor.authorGutierrez, J.
dc.contributor.authorVicentini-Paulino, MLM
dc.contributor.institutionUniv Barcelona
dc.contributor.institutionIBAMA
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:49:47Z
dc.date.available2014-05-20T13:49:47Z
dc.date.issued2002-06-01
dc.description.abstractMetabolic changes during the transition from post-feeding to fasting were studied in Brycon cephalus, an omnivorous teleost from the Amazon Basin in Brazil. Body weight and somatic indices (liver and digestive tract), glycogen and glucose content in liver and muscle, as well as plasma glucose, free fatty acids (FFA), insulin and glucagon levels of B. cephalus, were measured at 0, 12, 24, 48, 72, 120, 168 and 336 h after the last feeding. At time 0 h (the moment of food administration, 09.00 h) plasma levels of insulin and glucagon were already high, and relatively high values were maintained until 24 h post-feeding. Glycemia was 6.42 +/- 0.82 mM immediately after food ingestion and 7.53 +/- 1.12 MM at 12 h. Simultaneously, a postprandial replenishment of liver and muscle glycogen reserves was observed. Subsequently, a sharp decrease of plasma insulin occurred, from 7.19 +/- 0.83 ng/ml at 24 h of fasting to 5.27 +/- 0.58 ng/ml at 48 h. This decrease coincided with the drop in liver glucose and liver glycogen, which reached the lowest value at 72 h of fasting (328.56 +/- 192.13 and 70.33 +/- 14.13 mumol/g, respectively). Liver glucose increased after 120 h and reached a peak 168 h post-feeding, which suggests that hepatic gluconeogenesis is occurring. Plasma FFA levels were low after 120 and 168 h and increased again at 336 h of fasting. During the transition from post-feeding to fast condition in B. cephalus, the balance between circulating insulin and glucagon quickly adjust its metabolism to the ingestion or deprivation of food. (C) 2002 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv Barcelona, Fac Biol, Dept Fisiol, E-08028 Barcelona, Spain
dc.description.affiliationIBAMA, Ctr Nacl Pesquisa Peixes Trop, Lab Fisiol, BR-13630000 Pirassununga, SP, Brazil
dc.description.affiliationUniv Fed Sao Carlos, Dept Genet & Evolucao, Lab Bioquim Adaptat, BR-13560000 Sao Carlos, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, Dept Fisiol, Inst Biociencias, BR-18600000 Botucatu, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Dept Fisiol, Inst Biociencias, BR-18600000 Botucatu, SP, Brazil
dc.format.extent467-476
dc.identifierhttp://dx.doi.org/10.1016/S1095-6433(02)00094-6
dc.identifier.citationComparative Biochemistry and Physiology A-molecular and Integrative Physiology. New York: Elsevier B.V., v. 132, n. 2, p. 467-476, 2002.
dc.identifier.doi10.1016/S1095-6433(02)00094-6
dc.identifier.issn1095-6433
dc.identifier.urihttp://hdl.handle.net/11449/17756
dc.identifier.wosWOS:000176113300023
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofComparative Biochemistry and Physiology A-molecular & Integrative Physiology
dc.relation.ispartofjcr2.258
dc.relation.ispartofsjr0,836
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectpost-feedingpt
dc.subjectstarvationpt
dc.subjectglycemiapt
dc.subjectFFApt
dc.subjectinsulinpt
dc.subjectglucagonpt
dc.subjecthepatic and muscle glycogenpt
dc.subjecthepatic and muscle glucosept
dc.subjectfishpt
dc.subjectBrycon cephaluspt
dc.titleMetabolic changes in Brycon cephalus (Teleostei, Characidae) during post-feeding and fastingen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.orcid0000-0002-0863-9728[3]
unesp.author.orcid0000-0002-2641-0361[2]
unesp.author.orcid0000-0002-3126-2236[6]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Botucatupt

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