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Effects of autonomic blockade on acute thermal tolerance and cardioventilatory performance in rainbow trout, Oncorhynchus mykiss.
Ekström A, Jutfelt F, Sandblom E. Ekström A, et al. J Therm Biol. 2014 Aug;44:47-54. doi: 10.1016/j.jtherbio.2014.06.002. Epub 2014 Jun 9. J Therm Biol. 2014. PMID: 25086973
Rainbow trout was instrumented with a flow probe and a ventilation catheter for cardioventilatory recordings and exposed to an acute thermal challenge until CTmax following selective pharmacological blockade of muscarinic or β-adrenergic receptors. ...This may repre …
Rainbow trout was instrumented with a flow probe and a ventilation catheter for cardioventilatory recordings and exposed to an …
Experimental manipulations of tissue oxygen supply do not affect warming tolerance of European perch.
Brijs J, Jutfelt F, Clark TD, Gräns A, Ekström A, Sandblom E. Brijs J, et al. Among authors: ekstrom a. J Exp Biol. 2015 Aug;218(Pt 15):2448-54. doi: 10.1242/jeb.121889. Epub 2015 May 29. J Exp Biol. 2015. PMID: 26026041
Additionally, oxygen consumption rates of anaemic perch during thermal ramping increased in a similar exponential manner to that in control fish, highlighting that perch have an impressive capacity to compensate for a substantial reduction in blood oxygen carrying c …
Additionally, oxygen consumption rates of anaemic perch during thermal ramping increased in a similar exponential manner to that in c …
Dynamic changes in scope for heart rate and cardiac autonomic control during warm acclimation in rainbow trout.
Ekström A, Hellgren K, Gräns A, Pichaud N, Sandblom E. Ekström A, et al. J Exp Biol. 2016 Apr 15;219(Pt 8):1106-9. doi: 10.1242/jeb.134312. Epub 2016 Feb 19. J Exp Biol. 2016. PMID: 26896548
Maximum heart rate also increased with warming, although a partial modest decrease occurred during the acclimation period. Consequently, heart rate scope exhibited a complex pattern with an initial increase with acute warming, followed by a steep decline and …
Maximum heart rate also increased with warming, although a partial modest decrease occurred during the acclimation period. Consequent …
Cardiorespiratory upregulation during seawater acclimation in rainbow trout: effects on gastrointestinal perfusion and postprandial responses.
Brijs J, Gräns A, Ekström A, Olsson C, Axelsson M, Sandblom E. Brijs J, et al. Among authors: ekstrom a. Am J Physiol Regul Integr Comp Physiol. 2016 May 1;310(9):R858-65. doi: 10.1152/ajpregu.00536.2015. Epub 2016 Feb 24. Am J Physiol Regul Integr Comp Physiol. 2016. PMID: 26911464
The elevated GBF was achieved via a combination of increased CO, mediated through elevated stroke volume (SV), and a redistribution of blood flow to the gastrointestinal tract. ...Although unfed seawater-acclimated trout displayed substantially elevated cardiorespir …
The elevated GBF was achieved via a combination of increased CO, mediated through elevated stroke volume (SV), and a redistrib …
Cardiac oxygen limitation during an acute thermal challenge in the European perch: effects of chronic environmental warming and experimental hyperoxia.
Ekström A, Brijs J, Clark TD, Gräns A, Jutfelt F, Sandblom E. Ekström A, et al. Am J Physiol Regul Integr Comp Physiol. 2016 Aug 1;311(2):R440-9. doi: 10.1152/ajpregu.00530.2015. Epub 2016 Jun 8. Am J Physiol Regul Integr Comp Physiol. 2016. PMID: 27280433
We tested these hypotheses by continuously measuring venous oxygen tension (Pvo2) and cardiovascular variables in vivo during acute warming in European perch (Perca fluviatilis) from a reference area during summer (18°C) and a chronically heated area (Biotest enclos …
We tested these hypotheses by continuously measuring venous oxygen tension (Pvo2) and cardiovascular variables in vivo during acute warming …
Chronic environmental warming alters cardiovascular and haematological stress responses in European perch (Perca fluviatilis).
Ekström A, Jutfelt F, Fredrik Sundström L, Adill A, Aho T, Sandblom E. Ekström A, et al. J Comp Physiol B. 2016 Dec;186(8):1023-1031. doi: 10.1007/s00360-016-1010-4. Epub 2016 Jun 18. J Comp Physiol B. 2016. PMID: 27318665
We compared cardiovascular and haematological responses to chasing stress in cannulated wild European perch (Perca fluviatilis) from a reference area at natural temperature (16 °C) with perch from the 'Biotest enclosure'; an experimental system chronically warmed (22 °C) b …
We compared cardiovascular and haematological responses to chasing stress in cannulated wild European perch (Perca fluviatilis) from a
Cardiac reflexes in a warming world: thermal plasticity of barostatic control and autonomic tones in a temperate fish.
Sandblom E, Ekström A, Brijs J, Sundström LF, Jutfelt F, Clark TD, Adill A, Aho T, Gräns A. Sandblom E, et al. Among authors: ekstrom a. J Exp Biol. 2016 Sep 15;219(Pt 18):2880-2887. doi: 10.1242/jeb.140319. Epub 2016 Jul 8. J Exp Biol. 2016. PMID: 27401764
We compared cardiac autonomic control and baroreflex regulation of heart rate in perch (Perca fluviatilis L.) from a reference area in the Baltic Sea at 18-19°C with conspecifics from the Biotest enclosure, a chronically heated ecosystem receiving warmed effluent wa …
We compared cardiac autonomic control and baroreflex regulation of heart rate in perch (Perca fluviatilis L.) from a reference area i …
Thermal sensitivity and phenotypic plasticity of cardiac mitochondrial metabolism in European perch, Perca fluviatilis.
Ekström A, Sandblom E, Blier PU, Dupont Cyr BA, Brijs J, Pichaud N. Ekström A, et al. J Exp Biol. 2017 Feb 1;220(Pt 3):386-396. doi: 10.1242/jeb.150698. Epub 2016 Nov 16. J Exp Biol. 2017. PMID: 27852753
However, at temperatures exceeding 30°C, a drastic thermally induced decline in citrate synthase activity was observed in the cold- and warm-acclimated populations, respectively, indicating a bottleneck for producing the reducing equivalents required for oxidative p …
However, at temperatures exceeding 30°C, a drastic thermally induced decline in citrate synthase activity was observed in the cold- a …
Cardiac remodeling and increased central venous pressure underlie elevated stroke volume and cardiac output of seawater-acclimated rainbow trout.
Brijs J, Sandblom E, Dekens E, Näslund J, Ekström A, Axelsson M. Brijs J, et al. Among authors: ekstrom a. Am J Physiol Regul Integr Comp Physiol. 2017 Jan 1;312(1):R31-R39. doi: 10.1152/ajpregu.00374.2016. Epub 2016 Nov 30. Am J Physiol Regul Integr Comp Physiol. 2017. PMID: 27903511
By examining a range of circulatory and cardiac morphological variables of seawater- and freshwater-acclimated rainbow trout, the present study revealed a significantly higher central venous pressure (CVP) in seawater-acclimated trout (~0.09 vs. -0.02 kPa). ...Furth …
By examining a range of circulatory and cardiac morphological variables of seawater- and freshwater-acclimated rainbow trout, the pre …
Dynamic changes in cardiac mitochondrial metabolism during warm acclimation in rainbow trout.
Pichaud N, Ekström A, Hellgren K, Sandblom E. Pichaud N, et al. Among authors: ekstrom a. J Exp Biol. 2017 May 1;220(Pt 9):1674-1683. doi: 10.1242/jeb.152421. Epub 2017 Feb 15. J Exp Biol. 2017. PMID: 28202582
The decrease in rates of oxygen between day 0 and day 1 coincided with an increased cytochrome c effect and a decreased mitochondrial coupling, suggesting a structural/functional impairment of mitochondria during acute warming. We suggest that after 2 days of warm a …
The decrease in rates of oxygen between day 0 and day 1 coincided with an increased cytochrome c effect and a decreased mitochondrial …
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