Hostname: page-component-8448b6f56d-qsmjn Total loading time: 0 Render date: 2024-04-18T17:29:17.789Z Has data issue: false hasContentIssue false
  • English
  • Français

The Biology of Echinocardium cordatum

Published online by Cambridge University Press:  11 May 2009

Hilary B. Moore
Hilary B. Moore
Affiliation:
Marine Biological Laboratory, Plymouth.
Get access Rights & Permissions [Opens in a new window]

Extract

1. Monthly samples of Echinocardium cordatum were taken at Port Erin in 1932,1933 and 1934, and at intervals at Fairlie Sands in the Clyde.

2. Growth is continuous throughout the year with the exception of February-March. In their first winter the young urchins attain a length of about 10 mm. at Millport and 15–20 mm. at Port Erin. In their second winter they are about 20 mm. at Millport, and 30–35 mm. at Port Erin.

4. The year 1931 was cold and produced a very small brood of young urchins; 1932 and 1933 were warm years and produced very large broods.

5. The young settle below low water and migrate into the interval zone after an interval of four to twelve months.

6. The gonads of the young urchins mature in their second year. Spawning takes place in June–July–August.

7. The nutritive bodies in the ovaries are shown to be derived from the disintegration of relict ova.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 20 , Issue 3 , March 1936 , pp. 655 - 671
Copyright
Copyright © Marine Biological Association of the United Kingdom 1936

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Bruce, J. R. 1928. Physical Factors on the Sandy Beach. Pt. 1. Tidal, Climatic and Edaphic. Journ. Mar. Biol. Assoc., N.S., Vol. XV, pp. 535–552.CrossRefGoogle Scholar
Elmhirst, R. E. 1923. Notes on the Breeding and Growth of Marine Animals in the Clyde Sea Area. Scott. Mar. Biol. Assoc. Ann. Rept. for the year 1922, pp. 19–43.Google Scholar
Marine Biological Association. 1931. Plymouth Marine Fauna.Google Scholar
Miller, R. A., and Smith, H. B. 1931. Observations on the Formation of the Egg of Echinometra lucunter. Papers from Tortugas Lab., Carnegie List., Washington, Vol. XXVII, pp. 1–105.Google Scholar
Moore, H. B. 1933. A Comparison of the Sand Fauna of Port Erin Bay in 1900 and in 1933. Proc. Malac. Soc., Vol. XX, Pt. VI, pp. 285–294.Google Scholar
Moore, H. B. 1935. A Comparison of the Biology of Echinus esculentus in different Habitats. Pt. II. Journ. Mar. Biol. Assoc., N.S., Vol. XX, pp. 109–128.CrossRefGoogle Scholar
Pirrie, M., Bruce, J. R., and Moore, H. B. 1932. A Quantitative Study of the Fauna of the Sandy Beach at Port Erin. Journ. Mar. Biol. Assoc., N.S., Vol. XVIII, pp. 279–296.CrossRefGoogle Scholar