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First published online July 2, 2004
Journal of Experimental Biology 207, 2867-2875 (2004)
Published by The Company of Biologists 2004
doi: 10.1242/jeb.01119

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Cardiac morphodynamic remodelling in the growing eel (Anguilla anguilla L.)

M. C. Cerra^1,2,*, S. Imbrogno², D. Amelio², F. Garofalo², E. Colvee³, B. Tota² and J. M. Icardo³

¹ Department of Pharmaco-Biology, University of Calabria, 87030 Arcavacata di Rende, CS, Italy
² Department of Cellular Biology, University of Calabria, 87030 Arcavacata di Rende, CS, Italy
³ Department of Anatomy and Cell Biology, University of Cantabria, 39011, Santander, Spain

View larger version (17K): [in a new window]   Fig. 1. Effects of preload and afterload elevation on fH and in isolated and perfused small (triangles; N=7) and large (squares; N=7) eel hearts. Values are means ± S.E.M. Comparison within group: open symbols, not significant; closed symbols, P<0.05. Comparison between groups: *P<0.05.

View larger version (15K): [in a new window]   Fig. 2. Effects of preload and afterload elevation on VS and WS in isolated and perfused small (triangles; N=7) and large (squares; N=7) eel hearts. Values are means ± S.E.M. Comparison within group: open symbols, not significant; closed symbols, P<0.05. Comparison between groups: *P<0.05.

View larger version (212K): [in a new window]   Fig. 3. Morphological changes that occur in the eel ventricle during growth. (a,b) Scanning, (c,d) light and (e,f) transmission-electron microscope images of small (a,c,e) and large (b,d,f) eels. (a,b) The thickness of the compacta and that of the trabeculae increases with growth. (c,d) The entire compacta thickness (arrows) of the small eel is included in c. At the same magnification, only part of the compacta appears in d. Note the increased vascularization of the latter. Arrows in d indicate accumulations of collagen; no such accumulations appear in c. (e,f) Myofibrils are developed at both ages. Note in f the alignment of the mitochondrial and myofibril axis. L, lacunary spaces; T, trabeculae; M, mitochondria. Bars, 25 µm (a,b); 25 µm (c,d); 600 nm (e,f).