Hostname: page-component-78c5997874-dh8gc Total loading time: 0 Render date: 2024-11-05T13:31:17.520Z Has data issue: false hasContentIssue false
  • English
  • Français

On the Biology of Calanus finmarchicus. II. Seasonal Variations in the size of Calanus finmarchicus in the Clyde Sea-Area

Published online by Cambridge University Press:  11 May 2009

S. M. Marshall
S. M. Marshall
Affiliation:
Naturalist at the Marine Station, Millport.
Get access Rights & Permissions [Opens in a new window]

Extract

The size of the cephalothorax in Stage IV, Stage V, and Stage VI Calanus has been measured during the year 1931–1932 at three stations in the Clyde Sea-Area.

In general the size was greatest when the water temperature was low, and least when it was high, but besides this there was a series of increases and decreases in size which were apparently connected with the breeding periods. The Calanus produced at the beginning of a breeding period were large (at Station I) and those produced at the end were small (at Stations I and II). The greatest production of eggs usually occurred when the female Calanus were of small size.

During the autumn of 1931 the Stage V Calanus from Station IV (upper Loch Fyne) were considerably larger than those from the rest of the area, but this distinction had been lost by the autumn of 1931.

Stages IV and V Calanus taken in the top 30 m. were almost invariably smaller than those from deeper water.

The Calanus show a very wide range of sizes, the range for Stage V overlapping those for both male and female. Possible causes of this are discussed.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 19 , Issue 1 , August 1933 , pp. 111 - 138
Copyright
Copyright © Marine Biological Association of the United Kingdom 1933

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

Adler, G., and Jespersen, P. 1920. Variations saisonnières chez quelques copepodes planctoniques marins. Meddelser fra Komm. fur Havundersogelser. Ser. Plankton, Vol. II, pp. 1–46.Google Scholar
Bogorov, G. 1933. Modifications in the biomass of Calanus finmarchicus in accordance with its age (English summary). Bulletin of the State Oceanographical Institute, 8, Moscow.Google Scholar
Gardiner, A. C. 1933. Vertical Distribution in Calanus finmarchicus. Journ. Mar. Biol. Assoc., N.S., Vol. XVIII, pp. 575–610.CrossRefGoogle Scholar
Gurney, R. 1929. Dimorphism and rate of growth in Copepoda. Internat. Rev. d. ges. Hydrobiol. u. Hydrogr., Bd. 21, pp. 189–207.CrossRefGoogle Scholar
Marshall, S. M., and Orr, A. P. 1927. The Relation of the Plankton to some Chemical and Physical Factors in the Clyde Sea-Area. Journ. Mar. Biol. Assoc., N.S., Vol. XIV, pp. 837–868.CrossRefGoogle Scholar
Mill, H. R. 1889–1891. The Clyde Sea Area. Trans. Roy. Soc. Edin., Vol. 37.Google Scholar
Ottestad, P. 1932. On the biology of some southern Copepoda. Hvalrådets Skrifter, No. 5, pp. 1–61.Google Scholar
Russell, F. S. 1928. The Vertical Distribution of Marine Macroplankton. VII. Observations on the Behaviour of Calanus finmarchicus. Journ. Mar. Biol. Assoc., N.S., Vol. XV, pp. 429–454.CrossRefGoogle Scholar
Seymour Sewell, R. B. 1912. Notes on the Surface-living Copepoda of the Bay of Bengal, I and II. Records of the Indian Museum, N.S., Vol. VII, pp. 313–382.Google Scholar
Seymour Sewell, R. B. 1929 and 1932. The Copepoda of Indian Seas. Calanoida. Memoirs of the Indian Museum, Vol. X, pp. 1–382.Google Scholar
Steuer, A. 1925. Rassenbildung bei einen marinen Planktoncopepoden. Zeitsch. f. wissensch. Zoologie, Bd. 125, pp. 91–101.Google Scholar
Steuer, A. 1931. Grossen- und Formvariation der Planktoncopepoden. Sitzungsber. d. mathematisch naturwiss. Klasse, Bd. 140, pp. 1–22.Google Scholar
Steuer, A. 1932. Copepoda 6. Pleuromamma Giesbr. 1898. Wissensch. Ergeb. d. Deutsch. Tiefsee Exped., Bd. 24, pp. 1–119.Google Scholar
Störmer, L. 1929. Copepods from the Michael Sars Expedition, 1924. Cons. Perm. Internat pour l'explor. de la mer. Rapports et Procès Verbaux des Réunions, Vol. LVI, pp. 1–57.Google Scholar