... increased cardiac heat tolerance and altered heart morphology in a hatchery-bred population of juvenile Atlantic salmon. Thermal tolerance Cardiac performance Salmonid Plasticity Muir, 2022 To examine the thermal sensitivity of cardiac performance in the two temperature...

... ; Pasparakis et al., 2016 ). Mussels acclimated to cyclic air exposure (i.e. air, predictable, unpredictable and field treatments) had elevated upper thermal limits of cardiac performance (i.e. FLT) compared with submerged mussels. This is perhaps not surprising as the thermal tolerance trial was performed...

... that rainbow trout may cope with the aversive effects caused by coronary artery obstruction through plastic ventricular remodeling, which, at least in part, restores cardiac performance and myocardium oxygenation. Cardiac remodeling following myocardial injury is a continuous and dynamic process that starts...

... , A. , Hicks , J. , Shiels , H. and Jain , K. ( 1996 ). Maximum cardiac performance of rainbow trout ( Oncorhynchus mykiss ) at temperatures approaching their upper lethal limit . J. Exp. Biol. 199 , 663 - 672 . Fry , F. E. J. and Hart , J. S. ( 1948 ). The relation...

... and/or exercise. At the individual scale, these responses were associated with a greater aerobic scope, maximum metabolic rate and net cost of locomotion, suggesting the higher energy cost of this strategy. This impaired cardiac performance could have wider consequences for other physiological performance...

... influenced by the pattern of fluctuation with which thermal stress was applied. Specifically, we examined whether there was a differential response (measured as cardiac performance) to repeated heat stress of a constant and predictable magnitude compared with heat stress applied in a stochastic...

... enlarged hearts with lower maximum stroke volume and cardiac output. In accordance with impaired cardiac performance, overall circulatory oxygen-transporting capacity was diminished as indicated by reduced aerobic swimming performance. In contrast to the well-known adaptive/physiological heart growth...

.... In these crabs, embryonic development occurs in the pH-variable intertidal zone (pH 6.9–9.5), larvae mature in the more stable pelagic environment (pH 7.9–8.2), and juvenile crabs settle back into the pH-variable intertidal zone. We examined survival, cardiac performance, energetics and morphology in embryonic...

...L. H. Petersen; A. K. Gamperl SUMMARY Recent in vivo experiments on Atlantic cod ( Gadus morhua ) acclimated to chronic hypoxia (6-12 weeks at 10°C; P w O 2 ~8-9 kPa) revealed a considerable decrease in the pumping capacity of the heart. To examine whether this diminished cardiac performance...

...M. C. Cerra; S. Imbrogno; D. Amelio; F. Garofalo; E. Colvee; B. Tota; J. M. Icardo SUMMARY The morphodynamic changes occurring during growth were evaluated in the eel( Anguilla anguilla L.) heart. Using an in vitro working heart preparation, cardiac performance of small (body mass 96.76±27.49 g...

... conditions. Working at basal levels, hearts did not require extracellular glucose to maintain power under aerobic conditions. However, cardiac performance was significantly reduced without exogenous glucose under oxygen-limiting conditions. The addition of the glucose transporter inhibitor cytochalasin B...

...Sandra Imbrogno; Lucia De Iuri; Rosa Mazza; Bruno Tota ABSTRACT Nothing is known about the effects of nitric oxide (NO) on cardiac performance in fish. Using an in vitro working heart preparation that generates physiological values of output pressure, cardiac output and ventricular work and power...

...A. K. Gamperl; A. W. Pinder; R. R. Grant; R. G. Boutilier ABSTRACT To investigate the relationship between cardiac performance and coronary perfusion, cardiovascular variables ( Q̇, V S , f H , P DA ) and coronary blood flow ( q̇ cor ) were measured in rainbow trout ( Oncorhynchus mykiss ) (1.2–1.6...

...A. K. Gamperl; A. W. Pinder; R. G. Boutilier ABSTRACT In fish, catecholamine-induced changes in cardiac performance in vivo are the result of complex interactions between the direct adrenergic effects on the heart and peripheral circulation and the reflex responses to increased blood pressure...

... of only 0.074%. Moreover, as males matured and their testes grew from 0.07 to 3.92% of body mass, RVM more than doubled. In female trout no such heart growth occurred; RVM remained unchanged during the period of ovary growth. Cardiac performance was assessed using an in situ perfused heart preparation...

... preparation used in this study was comparable to the in situ perfused heart preparation used by Farrell et al . (1986) . Cardiac performance was similar to that of the Farrell et al . (1986) preparation and the filling and output pressures used and cardiac outputs generated were generally...

... cephalopods cardiac performance hypoxia Ventilation and blood flow have been studied in some detail in Octopus (for reviews see Wells & Wells, 1983 ; Wells et al . 1987 ) but equivalent data for squids are scarce owing mainly to the difficulties of keeping these free-swimming predators...

... persistent intracellular action. Cardiac performance in the molluscs has a number of features in common with the lower vertebrates, most notably that changes in output may be primarily accommodated by altering stroke volume and not heart rate (for review see Smith, 1985 b ). This point is clearly seen...