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The structure of the spine of the spur dogfish (Squalus Acanthias L.) and its use for age determination

Published online by Cambridge University Press:  11 May 2009

M. J. Holden  and
P. S. Meadows
M. J. Holden
Affiliation:
Fisheries Laboratory, Lowestoft
P. S. Meadows
Affiliation:
Marine Laboratory, Aberdeen
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Summary

The external and internal structure of the spines of Squalus acanthias are described. Internally the spines consist of a series of dentine cones laid down one within the other. This series is reflected in the external structure by bands of pigment associated with ridges of enamel. The latter are proved to be annual.

The use of the spines for age determination is discussed and the growth parameters and growth curves calculated. The results obtained differ from those of previous authors, whose work is critically discussed.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 42 , Issue 2 , June 1962 , pp. 179 - 197
Copyright
Copyright © Marine Biological Association of the United Kingdom 1962

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