Metabolic response to feeding in Tupinambis merianae: Circadian rhythm and a possible respiratory constraint


Autoria(s): Klein, Wilfried; Perry, Steven F.; Abe, Augusto Shinya; Andrade, Denis V.
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

26/02/2014

20/05/2014

26/02/2014

20/05/2014

01/05/2006

Resumo

The diurnal tegu lizard Tupinambis merianae exhibits a marked circadian variation in metabolism that is characterized by the significant increase in metabolism during part of the day. These increases in metabolic rate, found in the fasting animal, are absent during the first 2 d after meal ingestion but reappear subsequently, and the daily increase in metabolic rate is added to the increase in metabolic rate caused by digestion. During the first 2 d after feeding, priority is given to digestion, while on the third and following days, the metabolic demands are clearly added to each other. This response seems to be a regulated response of the animal, which becomes less active after food ingestion, rather than an inability of the respiratory system to support simultaneous demands at the beginning of digestion. The body cavity of Tupinambis is divided into two compartments by a posthepatic septum (PHS). Animals that had their PHS surgically removed showed no significant alteration in the postprandial metabolic response compared to tegus with intact PHS. The maximal metabolic increment during digestion, the relative cost of meal digestion, and the duration of the process were virtually unaffected by the removal of the PHS.

Formato

593-601

Identificador

http://dx.doi.org/10.1086/502818

Physiological and Biochemical Zoology. Chicago: Univ Chicago Press, v. 79, n. 3, p. 593-601, 2006.

1522-2152

http://hdl.handle.net/11449/21026

10.1086/502818

WOS:000237805100015

Idioma(s)

eng

Publicador

Univ Chicago Press

Relação

Physiological and Biochemical Zoology

Direitos

closedAccess

Tipo

info:eu-repo/semantics/article