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Keywords: Cortisol
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Journal Articles
J Exp Biol (2021) 224 (13): jeb238683.
Published: 5 July 2021
... tolerance (assessed as the critical thermal maximum, CT max ). Here, we tested the hypothesis that chronic elevation of circulating cortisol levels reduces thermal tolerance in subordinate trout. In support of this hypothesis, subordinate trout that recovered from social stress for 48 h, a period sufficient...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (24): jeb231613.
Published: 29 December 2020
... to cleaning services alters indicators of health status such as body condition, immunity and the steroids cortisol and testosterone in four client damselfish species Pomacentrus amboinensis , Amblyglyphidodon curacao , Acanthochromis polyacanthus and Dischistodus perspicillatus . To do so, we took advantage...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (24): jeb234914.
Published: 24 December 2020
... relationship with other stress-related biomarkers, and how the incidence of an immune challenge during long-term stress could affect an individual’s overall stress response. We investigated here the relationship between basal and post-acute stress fecal cortisol metabolite (FC) with different antioxidant...
Journal Articles
J Exp Biol (2020) 223 (18): jeb226092.
Published: 28 September 2020
... affected anxiety-like behaviors. Cortisol measurements showed lower basal levels and an increased amplitude of stress response after a change of environment in fish carrying the mutation. Finally, we studied the distribution of the P106L mao allele in wild populations of cave and river A. mexicanus...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (11): jeb192096.
Published: 31 May 2019
...Dennis Kolosov; Scott P. Kelly ABSTRACT Cortisol-induced epithelial tightening of a primary cultured rainbow trout gill epithelium model occurs in association with reduced paracellular permeability and increased abundance of select barrier-forming tight junction (TJ) proteins. Corticosteroid...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (16): jeb177683.
Published: 23 August 2018
... has been variable and an alternative hypothesis suggests that testosterone may be acting indirectly via cortisol to suppress immunity (the stress-linked ICHH). A third hypothesis is that increased energetic investment in immunity results in the suppression of testosterone. We tested these hypotheses...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (5): jeb164582.
Published: 12 March 2018
... increases in the abundance of CAc-positive PNA + ionocytes were detected following exposure of trout to a base load via recovery from hypercapnia or base infusion (72 h infusion with 140 mmol l −1 NaHCO 3 ). The percentage of CAc-positive PNA + ionocytes also was increased in trout treated with cortisol (10...
Journal Articles
J Exp Biol (2018) 221 (4): jeb176735.
Published: 22 February 2018
... the impact of housing conditions in this species are scarce. In this study, we verified the effects of EE on behavioral (novel tank test) and biochemical [cortisol and reactive oxygen species (ROS)] parameters in zebrafish submitted to unpredictable chronic stress (UCS). Consistent with our previous findings...
Journal Articles
J Exp Biol (2017) 220 (21): 3976–3987.
Published: 1 November 2017
... and was negative at 24°C, with an estimated upper limit for positive growth of 23.4°C. Plasma cortisol increased with temperature and was 12- and 18-fold higher at 22 and 24°C, respectively, than at 16°C, whereas plasma glucose was unaffected by temperature. Abundance of heat shock protein 70 (HSP70) in the gill...
Journal Articles
J Exp Biol (2017) 220 (17): 3154–3161.
Published: 1 September 2017
..., are responsible for the seasonal decrease in phenotypic flexibility of energy metabolism in photoresponsive mammals. To quantify reaction norms for basal metabolic rate (BMR) and cortisol (CORT) secretion, male Siberian hamsters maintained at a long (16 h:8 h light:dark) photoperiod were acclimated repeatedly...
Includes: Supplementary data
Journal Articles
J Exp Biol (2017) 220 (13): 2328–2334.
Published: 1 July 2017
... the tail followed by short-term (1 day) or long-term (17–18 days) recovery or repeatedly chased intact fish with a plastic rod over a 7 day period. We measured cell proliferation (PCNA+ cell density) in the telencephalon and diencephalon, and plasma cortisol, which commonly mediates stress-induced changes...
Journal Articles
J Exp Biol (2017) 220 (6): 1056–1064.
Published: 15 March 2017
... ratio by rearing zebrafish at different initial densities (9, 19, 37 and 74 fish per litre) for 3 months (6–90 days post-fertilization, dpf), and the second focusing on the effects of cortisol during the sex differentiation period (15–45 dpf) for zebrafish reared at low density. The results showed...
Includes: Supplementary data
Journal Articles
J Exp Biol (2016) 219 (24): 3907–3914.
Published: 15 December 2016
... or repeated stress can lead to allostatic overload, where neuroendocrinal and behavioral reactions to stress become maladaptive. This work examines forebrain mechanisms involved in allostatic processes in teleost fishes. Plasma cortisol, forebrain serotonergic (5-HTergic) neurochemistry, and mRNA levels...
Journal Articles
J Exp Biol (2016) 219 (11): 1734–1743.
Published: 1 June 2016
... to establish dominant/subordinate hierarchies; their offspring were reared to 144 h post-fertilization (hpf) and sampled at five time points over development. No differences were detected in maternal cortisol contribution, which is thought to be an important programmer of offspring phenotype. However, once...
Journal Articles
J Exp Biol (2015) 218 (16): 2538–2550.
Published: 1 August 2015
... unpredictable stressors three times a day. At the end of the trial, experimental and control fish were challenged with yet another novel stressor and sampled before and 1 h after that challenge. Plasma cortisol decreased steadily over time in stressed fish, indicative of exhaustion of the endocrine stress axis...
Journal Articles
J Exp Biol (2015) 218 (11): 1667–1676.
Published: 1 June 2015
... of hormone assays suggest that cortisol levels could play a role in the attenuation of sickness in long-day food-restricted hamsters, indicating that future research should target the roles of glucocorticoids and natural variation in energy stores in seasonal sickness variation. * Author...
Journal Articles
J Exp Biol (2015) 218 (2): 316–325.
Published: 15 January 2015
...Laura Cádiz; Javier Román-Padilla; Magdalena Gozdowska; Ewa Kulczykowska; Gonzalo Martínez-Rodríguez; Juan M. Mancera; Juan A. Martos-Sitcha In the present study, we assessed the responses of the vasotocinergic and isotocinergic systems to chronic stress induced by cortisol administration...
Journal Articles
J Exp Biol (2014) 217 (10): 1768–1774.
Published: 15 May 2014
... it feeds and is highly aggressive to both intra- and interspecific intruders. Behavioral differences between intra- and interspecific aggressive responses to sTI were marginal, and sTI tests caused an increase in cortisol levels that was positively related with the levels of aggression. In contrast...
Journal Articles
J Exp Biol (2014) 217 (8): 1407–1416.
Published: 15 April 2014
...Marcos A. López-Patiño; Manuel Gesto; Marta Conde-Sieira; José L. Soengas; Jesús M. Míguez Cortisol has been suggested to mediate the effect of stress on pineal melatonin synthesis in fish. Therefore, we aimed to determine how pineal melatonin synthesis is affected by exposing rainbow trout...
Journal Articles
J Exp Biol (2014) 217 (1): 23–34.
Published: 1 January 2014
... fish communities . Mar. Ecol. Prog. Ser. 207 , 155 - 169 . Le Moal M. ( 2007 ). Historical approach and evolution of the stress concept: a personal account . Psychoneuroendocrinology 32 Suppl. , S3 - S9 . Leach G. J. , Taylor M. H. ( 1980 ). The role of cortisol...