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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Do prolonged fasting periods influence the postprandial metabolic responses in turtles? What canTrachemys scripta elegansteach us about this?

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Autor(es):
de Figueiredo, Aymam C. [1] ; de Carvalho, Jose E. [1, 2]
Número total de Autores: 2
Afiliação do(s) autor(es):
[1] Univ Fed Sao Paulo, Programa Posgrad Ecol & Evolucao, Lab Ecol Zool & Fisiol Comparada, Inst Ciencias Ambientais Quim & Farmaceut, Campus Diadema, Sao Paulo - Brazil
[2] Univ Fed Sao Paulo, Dept Ecol & Biol Evolut, Inst Ciencias Ambientais Quim & Farmaceut, Campus Diadema, Sao Paulo - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF EXPERIMENTAL ZOOLOGY PART A-ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY; v. 333, n. 9, p. 644-651, NOV 2020.
Citações Web of Science: 0
Resumo

The postprandial period is characterized by a modification of the gastrointestinal activity after food intake, accompanied by an increase in metabolic rate, secretion of acids, and absorption of nutrients. For ectothermic vertebrates, those changes are particularly prominent given the relatively low metabolic cost and the low frequency of food uptake. However, prolonged fasting periods decrease energy reserves and may compromise the upregulation of costly processes, such as the increase in metabolic rate after resuming the meal intake. Assuming that the main source of energy needed to support such events is provided from the animal's own body reserves, our aim with this study is to test the hypothesis that the longer the period of fasting, the smaller the metabolic rate increase during the postprandial period, since lesser energy reserves trigger these increases. For this, we measured the oxygen consumption rates (V?O-2) of red-eared slider turtles,Trachemys scripta elegans, submitted to different periods of fasting (47 and 102 days), before and after the ingestion of meals equivalent to 5% of their body masses. Despite the longer fasting period, which led to a reduction of 10.77% in the body mass of the turtles, there were no differences between the two experimental groups regarding maximum V?O(2)values after food intake (V?O(2)peak), postprandial metabolic scope, mean time to V?O(2)peak, and postprandial duration. Results indicate that 102 fasting days does not compromise aerobic metabolic increase during postprandial period and does not impair digestive process of the turtles, even with a loss of body mass. (AU)

Processo FAPESP: 08/57712-4 - Instituto Nacional de Pesquisas em Fisiologia Comparada
Beneficiário:Augusto Shinya Abe
Linha de fomento: Auxílio à Pesquisa - Temático