Hostname: page-component-586b7cd67f-rcrh6 Total loading time: 0 Render date: 2024-11-22T12:28:27.114Z Has data issue: false hasContentIssue false
  • English
  • Français

On Rhythmic Periods in Shell-growth in 0. edulis with a Note on Fattening

Published online by Cambridge University Press:  11 May 2009

J. H. Orton
J. H. Orton
Affiliation:
Chief Naturalist at the Plymouth Laboratory.
Get access Rights & Permissions [Opens in a new window]

Summary

Continuous observations on the Upper Fal Estuary oyster beds during the years 1925, 1926, and 1927 have established the fact that 0. edulis exhibits on these beds two definite periods of shell-growth, i.e. increase in shell-area, in one year; one period of general shell-growth occurs in the spring, beginning early in April, and the other in autumn at the end of September or early in October. There is some evidence-but as yet incomplete-that internal shell-growth occurs solely and simultaneously with the deposition and thickening of the new shell-shoots in a period of one to two months.

These general bursts of shell-growth occur in the pre-breeding and post-breeding part of the season

Similar periods of shell-growth occur on beds in the River Blackwater (AVest Mersea), and also occur mainly in the pre-breeding and postbreeding part of the season; but shell-growth begins in the spring in April-May on these beds, a few weeks later than on the Upper Fal Estuary, and in the autumn in August-September a few weeks earlier than on the Upper Fal beds.

Spring and autumn periods of shell-growth are also known to occur on many other estuarine beds.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 15 , Issue 2 , April 1928 , pp. 365 - 427
Copyright
Copyright © Marine Biological Association of the United Kingdom 1928

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

1Orton, J. H. Report on a Survey of the Fal Estuary Oyster Beds (Nov., 1924) with Notes on the Biology of the Oyster (O. edulis). Falmouth, 1926.CrossRefGoogle Scholar
2Orton, J. H., and Amirthalingam, C. Notes on Shell Depositions in Oysters. Journ. Mar. Biol. Assoc, XIV, 4, 1927.Google Scholar
3Orton, J. H.Observations on the Fal Estuary Oyster Beds during 1926, including a Study in Over-fishing. Journ. Mar. Biol. Assoc, XIV, 4, 1927.Google Scholar
4Do. On Lunar Periodicity in Spawning of normally grown Falmouth Oysters (O. edulis) in 1925, with a comparison of the spawning capacity of normally grown and dumpy Oysters. Journ. Mar. Biol. Assoc, XIV, 1, 1926.Google Scholar
5Do. The Conditions for Calcareous Metabolism in Oysters and other Marine Animals. Nature, Vol. 116, p. 13, 1925.CrossRefGoogle Scholar
6Do. Observations and Experiments on Sex-Change in the European Oyster (O. edulis). Part I. The Change from Female to Male. Journ. Mar. Biol. Assoc, XIV, 4, 1927.Google Scholar
7— The Book of Normals. Meteorological Office, Air Ministry (M.O. 236, Section I), 1919.Google Scholar
8Fox, W. L., and Phillips, J. B. Report of the Observatory Committee of the Royal Cornwall Polytechnic Society with Meteoro-logical Tables for the year 1915. Falmouth, 1916.Google Scholar
9Mill, H. R.On the Temperature of the Water in the Firth of Forth. Proc. Roy. Soc. Edin., Vol. XIII, 1884–1886, p. 347.Google Scholar
10Dickson, H. N. The Mean Temperature of the Surface Waters of the Sea round the British Coasts, and its Relation to the Mean Temperature of the Air. Quart. Journ. Roy. Met. Soc, Vol. XXV, No. 112, Oct., 1899.Google Scholar
11Hansen, , Helland, , and Nansen, F.. Temperatur-Schwankungen des Nordatlantischen Ozeans und in der Atmosphäre. Videnskaps-selskapets Skrifter, I. Mat-naturv. Klasse, 1916, No. 9. Kristiania, 1917.Google Scholar
12Orton, J. H. Sea-temperature Breeding and Distribution in Marine Animals. Journ. Mar. Biol. Assoc, XII, 2, 1920.Google Scholar
13Do. An Account of Investigation into the Cause or Causes of the unusual Mortality among Oysters in English Oyster Beds during 1920 and 1921. Fish. Invest., II, Vol. VI, No. 3. Part I. Report, 1923, London.Google Scholar
13aDo. Do. Vol. VI, No. 4, Part II. Appendices, 1924.Google Scholar
14Lebour, M. V. The Microplankton of Plymouth Sound from the Region beyond the Breakwater. Journ. Mar. Biol. Assoc, XI, 2, 1917.Google Scholar
15Savage, R. E. The Food of the Oyster. Fishery Investigations, II. Vol. VIII, I 1925. London.Google Scholar
16Nelson, T. C. On the Feeding Habits of Oysters. Proc. Soc. Exp. Biol. and Med., XXI, 1923, pp. 90–91. New York.Google Scholar
17Russell, E. S. Report on Seasonal Variation in the Chemical Composition of Oysters. Fish. Invest. London, II, Vol. VI, 1, 1923.Google Scholar
18Orton, J. H. The so-called Baccy Juice in the AVaters over the Thames Oyster Beds. Nature, Vol. 111, p. 773, 1923.CrossRefGoogle Scholar
19Marshall, S. M., and Orr, A. P.The Relation of the Plankton to some Chemical and Physical Factors in the Clyde Sea Area. Journ. Mar. Biol. Assoc, XIV, 4, 1927.Google Scholar
20— Book of Normals. Meterological Office, London. M.O. 214a, 1915.Google Scholar
21Knudsen, M. Conseil. Inter, pour l'Exploratiori de la Mer. Supplement to the Bulletin, 1906–1907.Google Scholar
22Orton, J. H.On Incomplete Spawning and the Problem of Fertilisation in O. edulis. Nature, Vol. 120, p. 403, 1927.CrossRefGoogle Scholar
23Do. The Mode of Feeding of the Jelly-fish Aurelia aurita on the smaller Organisms in the Plankton. Nature, Vol. 110, p. 178, 1922.CrossRefGoogle Scholar
24Yonge, C. M.Structure and Physiology of the Organs of Feeding and Digestion in Ostrea edulis. Journ. Mar. Biol. Assoc, XIV, 2, 1926.Google Scholar
25Atkins, W. R. G.A Quantitative Consideration of some Factors concerned in Plant Growth in Water. Journal du Conseil, Vol. I, 3, 1926.Google Scholar
26Harvey, H. W.Nitrate In The Sea. Journ. Mar. Biol. Assoc, XV, 1, 1928.Google Scholar
27Atkins, W. R. G.The Phosphate Content of Sea-water in Relation to the growth of the Algal Plankton. Part III. Journ. Mar. Biol. Assoc, XIV, 2, 1926.Google Scholar
28Gardiner, , Stanley, J.. Summary Report (only) on a conjoint meeting on Oyster Research. Fish Trades Gazette. Vol. 38, No. 1942, August 7, 1920, p. 53.Google Scholar
29Atkins, W. R. G.The Hydrogen-Ion Concentration of Sea-water in its relation to Photosynthetic Changes. Part II. Journ. Mar. Bio. Assoc., XIII, 1, 1923.Google Scholar