Maximum cardiac performance and adrenergic sensitivity of the sea bass<i>Dicentrarchus labrax</i>at high temperatures

Farrell, Anthony P.; Axelsson, Michael; Altimiras, Jordi; Sandblom, Erik; Claireaux, Guy

doi:10.1242/jeb.002881

Cited by 27 publications

(15 citation statements)

References 55 publications

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“…hematocrit. It also indicates other regulation factors, such as gas diffusion distance, total respiratory surface area, heart rate, cardiac output and cardiac stroke volume may be more important for oxygen transport at high temperature (Saroglia, Cecchini, Terova, Caputo, & De Stradis, 2000;Saroglia, Terova, Stradis, & Caputo, 2002;Sollid et al, 2005;Sollid & Nilsson, 2006;Dowd et al, 2006;Farrell, Axelsson, Altimiras, Sandblom, & Claireaux, 2007;Farrell, Eliason, Sandblom, & Clark, 2009).…”

Section: Discussionmentioning

confidence: 99%

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Xie¹,

Xiao²,

Zhou³

et al. 2017

Turk. J. Fish. Aquat. Sci.

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The effects of acute temperature change and the following two weeks of acclimation from the initial 25°C to 15, 20, 30, and 35°C on the respiratory metabolism of the snakehead (Channa argus), a species tolerant to wide temperature range were examined in this study. The resting metabolic rate (RMR), ventilation frequency (VF), and several hematological parameters were determined. RMR of the fish post either acute temperature change or chronic acclimation was positively correlated with temperature, and exhibited V-shaped Q 10 values change vs temperature, which suggests that the snakehead has a varying thermal metabolic sensitivity dependent on temperature range. The decreased Q 10 value for RMR post chronic acclimation suggests that the metabolic thermal sensitivity of the snakehead can be reduced by acclimation. The VF increased with increasing temperature slower than RMR, which suggests that regulation of VF alone may not be sufficient to satisfy the oxygen demand of the snakehead as temperature increases. Cold compensation was observed in VF, but not RMR, which could be due to a decreasing oxygen exchange capacity of the gill during cold acclimation. Thus, the compensation in VF of cold acclimated fish may be necessary to maintain oxygen supply.

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Section: Discussionmentioning

confidence: 99%

Untitled

Xie¹,

Xiao²,

Zhou³

et al. 2017

Turk. J. Fish. Aquat. Sci.

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“…For example, Mendonça and Gamperl (Mendonça and Gamperl, 2009) showed that the winter flounder heart is not dependent upon adrenergic stimulation at rest, and only reported increases of 6% in V S and 10% in Q following the simultaneous injection of 0.2 and 0.4gkg -1 of AD and noradrenaline at 8°C, respectively. Maximum adrenergic stimulation (up to 500nmoll -1 ) has no effect on either heart rate or maximum Q, and only a modest (10-15%) positive inotropic effect on power output of the in situ sea bass (Dicentrarchus labrax) heart at 18 and 22°C (Farrell et al, 2007). Finally, Lague et al (Lague et al, 2012) report that AD and noradrenaline concentrations as high as 5ϫ10 -6 moll -1 have no effect on function of the 22°C in situ tilapia (Oreochromis hybrid) heart under conditions of normoxia, hypoxia or acidosis.…”

Section: Cardiac Function and Adrenergic Stimulationmentioning

confidence: 95%

“…However, the apparent lack of myocardial responsiveness to adrenaline in cod may be due to the fact that only a single experimental temperature (10°C) has been examined to date. For example, research on other teleosts indicates that acclimation to 'warm' temperatures or those within a fish's optimal thermal range may reduce myocardial adrenergic sensitivity and/or adrenoreceptor density (Graham and Farrell, 1989;Keen et al, 1993;Shiels et al, 2003;Farrell et al, 2007). Thus, by examining the effects of adrenergic stimulation on maximum cardiac performance at several temperatures (0, 4 and 10°C), we were able to further evaluate what role circulating catecholamines play in supporting cod cardiac performance, and indeed, whether this species differs from other teleosts in this regard.…”

Section: Introductionmentioning

confidence: 99%

Atlantic cod (Gadus morhua L.) in situ cardiac performance at cold temperatures: long-term acclimation, acute thermal challenge and the role of adrenaline

Lurman

Petersen

Gamperl

2012

Journal of Experimental Biology

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SUMMARYThe resting and maximum in situ cardiac performance of Newfoundland Atlantic cod (Gadus morhua) acclimated to 10, 4 and 0°C were measured at their respective acclimation temperatures, and when acutely exposed to temperature changes: i.e. hearts from 10°C fish cooled to 4°C, and hearts from 4°C fish measured at 10 and 0°C. Intrinsic heart rate (f H ) decreased from 41beatsmin -1 at 10°C to 33beatsmin -1 at 4°C and 25beatsmin -1 at 0°C. However, this degree of thermal dependency was not reflected in maximal cardiac output (Q max values were ~44, ~37 and ~34mlmin -1 kg -1 at 10, 4 and 0°C, respectively). Further, cardiac scope showed a slight positive compensation between 4 and 0°C (Q 10 1.7), and full, if not a slight over compensation between 10 and 4°C (Q 10 0.9). The maximal performance of hearts exposed to an acute decrease in temperature (i.e. from 10 to 4°C and 4 to 0°C) was comparable to that measured for hearts from 4°C-and 0°C-acclimated fish, respectively. In contrast, 4°C-acclimated hearts significantly out-performed 10°C-acclimated hearts when tested at a common temperature of 10°C (in terms of both Q max and power output). Only minimal differences in cardiac function were seen between hearts stimulated with basal (5nmoll ) levels of adrenaline, the effects of which were not temperature dependent. These results: (1) show that maximum performance of the isolated cod heart is not compromised by exposure to cold temperatures; and (2) support data from other studies, which show that, in contrast to salmonids, cod cardiac performance/myocardial contractility is not dependent upon humoral adrenergic stimulation.

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“…From the remaining fish, an in situ perfused heart preparation modified from Farrell et al (Farrell et al, 2007) was used to assess the maximum cardiac flow-generating capacity at 5, 12 and 18°C (three fish from each of the two replicate tanks, N=6 per experimental group). A halibut Ringer's solution (Rönnestad et al, 2000) containing isoprenaline (200 nmol l ; for maximum adrenergic stimulation) was used to perfuse the heart preparation, which was immersed in a saline-filled thermostat-controlled bath.…”

Section: Research Articlementioning

confidence: 99%

Aerobic scope fails to explain the detrimental effects on growth resulting from warming and elevated CO2 in Atlantic halibut

Gräns

Jutfelt

Sandblom

et al. 2014

Journal of Experimental Biology

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130

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As a consequence of increasing atmospheric CO 2 , the world's oceans are becoming warmer and more acidic. Whilst the ecological effects of these changes are poorly understood, it has been suggested that fish performance including growth will be reduced mainly as a result of limitations in oxygen transport capacity. Contrary to the predictions given by the oxygen-and capacity-limited thermal tolerance hypothesis, we show that aerobic scope and cardiac performance of Atlantic halibut (Hippoglossus hippoglossus) increase following 14-16 weeks exposure to elevated temperatures and even more so in combination with CO 2 -acidified seawater. However, the increase does not translate into improved growth, demonstrating that oxygen uptake is not the limiting factor for growth performance at high temperatures. Instead, long-term exposure to CO 2 -acidified seawater reduces growth at temperatures that are frequently encountered by this species in nature, indicating that elevated atmospheric CO 2 levels may have serious implications on fish populations in the future.

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Maximum cardiac performance and adrenergic sensitivity of the sea bassDicentrarchus labraxat high temperatures

Cited by 27 publications

References 55 publications

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Atlantic cod (Gadus morhua L.) in situ cardiac performance at cold temperatures: long-term acclimation, acute thermal challenge and the role of adrenaline

Aerobic scope fails to explain the detrimental effects on growth resulting from warming and elevated CO2 in Atlantic halibut

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