Title:	Time-dependent changes in cortisol and tympanic temperature lateralization during food deprivation stress in marmoset monkeys
Authors:	Pereira, Lucas Cardoso Maior, Rafael Plakoudi Souto Barros, Marília
Assunto::	Alimentação dos animais Stress (Psicologia) Cortisol Tímpano - temperatura Assimetria hemisférica Sagui
Issue Date:	16-Jul-2020
Publisher:	Frontiers
Citation:	PEREIRA, Lucas C.; MAIOR, Rafael S.; BARROS, Marília. Time-dependent changes in cortisol and tympanic temperature lateralization during food deprivation stress in marmoset monkeys. Frontiers in Behavioral Neuroscience, v. 14, art. 123, 2020. DOI: https://doi.org/10.3389/fnbeh.2020.00123. Disponível em: https://www.frontiersin.org/articles/10.3389/fnbeh.2020.00123/full. Acesso em: 11 nov. 2020.
Abstract:	Temporal information about food availability can be easily entrained, as in the case of fixed feeding routines of captive animals. A sudden unintentional or deliberate delay (e.g., food deprivation—FD) leads to frustration and psychological stress due to the loss of temporal predictability. How marmosets—an increasingly used small primate—process and respond to FD stress has not been previously assessed. Here we delayed the routine feeding of adult captive marmosets for 3 or 6 h. Blood cortisol concentration was used as a hormonal measure of the stress response. Changes in the left/right baseline tympanic membrane temperature (TMT) were used as an indirect ipsilateral indicator of hemisphere activity. Marmosets that were deprived for 3 h had higher cortisol levels than non-deprived controls. Cortisol concentration in the marmosets deprived for 6 h did not differ from controls possibly due to adaptative mechanisms against the detrimental effects of prolonged high cortisol levels. Interestingly, FD stress may have been processed more symmetrically at first, as indicated by the bilateral increase in TMT at the 3 h interval. As the event progressed (i.e., 6 h), a clear rightward TMT bias suggests that hemisphere activity had become asymmetrical. Therefore, the sudden loss of temporal predictability of an entrained routine feeding schedule induces time-dependent changes in the cortisol stress response and shifts in the TMT (and potentially hemisphere activity) lateralization bias of adult captive marmosets.
Licença::	Copyright © 2020 Pereira, Maior and Barros. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
DOI:	https://doi.org/10.3389/fnbeh.2020.00123
Appears in Collections:	Artigos publicados em periódicos e afins

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