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Notes on the Biology of Certain Lamellibranchs on the Scottish Coast

Published online by Cambridge University Press:  11 May 2009

A. C. Stephen
A. C. Stephen
Affiliation:
Royal Scottish Museum, Edinburgh
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1. The observations were made on the Hunterston Sands, Ayrshire, opposite the Cumbrae.

2. Small cockles appear on the ground about the beginning of August. This points to the breeding season being in summer and not spring, as is usually stated.

3. By the end of the first autumn some few of the spat are as much as 10 mm. in length, but most are under 6 mm. The winter ring is faint and easily overlooked.

4. The first of the several well-defined rings is therefore not the first but the second winter ring.

Type
Letter
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 17 , Issue 2 , September 1931 , pp. 277 - 300
Copyright
Copyright © Marine Biological Association of the United Kingdom 1931

References

LITERATURE CITED

1Johnstone, J. L.M.B.C. Memoir II. Cardium. 1899.Google Scholar
2Orton, J. H.On the Rate of Growth of Cardium edule. Part I. Experimental Observations. Journ. Mar. Biol. Assoc., N.S., Vol. XIV, No. 2, 1926, p. 239.CrossRefGoogle Scholar
3Stephen, A. C.Notes on the Biology of Tellina tenuis da Costa. Jouin. Mar. Biol. Assoc., Vol. XV, No. 2,1928, p. 683.CrossRefGoogle Scholar
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5Stephen, A. C.Studies on the Scottish Marine Fauna. Additional Observations on the Fauna of the Sandy and Muddy Areas of the Tidal Zone. Trans. Roy. Soc. Edin., Vol. LVI, Part II, No. 22, p. 521.Google Scholar