... provided that the original work is properly attributed. Summary: Additional mechanistic insights indicate why Atlantic salmon are more tolerant of high temperatures than Arctic char, and why char are particularly vulnerable to climate change. Thermal tolerance Heart Myocardium Red muscle...

...Elizabeth F. Johnston; Todd E. Gillis ABSTRACT Cold acclimation of rainbow trout, Oncorhynchus mykiss , causes collagen to increase within the extracellular matrix (ECM) of the myocardium, while warm acclimation has the opposite effect. The mechanism responsible for this remodelling response...

...Lindsay D. Waldrop; Laura A. Miller ABSTRACT Tunicates, small invertebrates within the phylum Chordata, possess a robust tubular heart which pumps blood through their open circulatory systems without the use of valves. This heart consists of two major components: the tubular myocardium, a flexible...

... the cardiac muscle of 10°C-acclimated adult fish (MYH card ). MYH card mRNA was first detected at 61 h.p.f., but strong signals were only observed in the adult myocardium. The present study has therefore revealed a complex pattern of expression of MYH genes in relation to developmental stage, muscle type...

... levels of winter quiescence. Comp. Biochem. Physiol. A 134 , 159 -167. Davie, P. S. and Farrell, A. P. ( 1991 ). The coronary and luminal circulations of the myocardium of fishes. Can. J. Zool. 69 , 1993 -2001. Davie, P. S. and Thorarensen, H. ( 1997 ). Heart growth in rainbow trout...

...Akira Sakurai; Hiroshi Yamagishi ABSTRACT We present several lines of evidence for the occurrence of graded synaptic transmission in addition to impulse-mediated transmission at the neuromuscular junction between cardiac ganglion (CG) neurones and the myocardium in the isopod crustacean Ligia...

... ©The Company of Biologists Limited 1997 capillary supply cold acclimatization myocardium skeletal muscle rainbow trout Oncorhynchus mykiss The swimming musculature of fishes is usually divided into anatomically and functionally discrete regions of white (fast glycolytic...

... Limited 1996 rainbow trout Oncorhynchus mykiss hagfish Eptatretus stoutii dogfish Squalus acanthias rat myocardium sarcolemma sarcoplasmic reticulum excitation–contraction coupling. Fishes have developed cardiovascular systems which must function under very different...

... cardiac work mitochondria myocardium Sprague-Dawley rat V˙ O 2 MAX The cardiovascular systems of mammals and reptiles differ greatly in their capacity for oxygen delivery ( Gleeson et al . 1980 ; Johansen and Burggren, 1980 ; Karas et al . 1987 ). Mammals achieve a tenfold higher oxygen...

... ). Force frequency relation in the myocardium of rainbow trout . J. comp. Physiol . B 159 , 61 – 69 . Hryshko , L. W. , Stiefel , V. and Bers , D. M. ( 1990 ). Rapid cooling contractures as an index of sarcoplasmic reticulum calcium content in rabbit ventricular myocytes . Am...

... reduction in . The increase in the apparent aerobic efficiency which enabled this is discussed. * Present address: Bioscience Department, Simon Fraser University, Burnaby, B.C., Canada, V5A 1S6. 29 1 1985 © 1985 by Company of Biologists 1985 Myocardium oxygen consumption...