Myogenic cell cycle duration in Harpagifer species with sub-Antarctic and Antarctic distributions: evidence for cold compensation
Julie C. Brodeur1,*,
Jorge Calvo2,
Andrew Clarke3 and
Ian A. Johnston1
1 Gatty Marine Laboratory, School of Biology, Division of Environmental and
Evolutionary Biology, University of St Andrews, St Andrews, Scotland, KY16
8LB, UK
2 Centro Austral de Investigaciones Cientificas (CADIC), Consejo Nacional de
Investigaciones Cientificas y Tecnicas (CONICET), CC92, Ushuaia, 9410, Tierra
del Fuego, Argentina
3 British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 OET,
UK

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Fig. 1. Theoretical curve obtained during repeated S-phase labelling. See text for
details.
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Fig. 2. Section from the fast myotomal muscle of Harpagifer antarcticus
illustrating nuclei stained uniquely for c-met (black arrow) and nuclei doubly
stained for c-met and 5-bromo-2'-deoxyuridine (BrdU; red arrow).
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Fig. 3. Proportion of c-met positive muscle cells immunoreactive for
5-bromo-2'-deoxyuridine (BrdU) following repeated intraperitoneal
injections of BrdU in Harpagifer antarcticus acclimated to 0°C
(black triangles; N=12) and Harpagifer bispinis acclimated
to 5°C (blue circles; N=18) and 10°C (red circles;
N=15).
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© The Company of Biologists Ltd 2003