Hostname: page-component-cd9895bd7-fscjk Total loading time: 0 Render date: 2025-01-03T14:14:35.862Z Has data issue: false hasContentIssue false
  • English
  • Français

Vertical Distribution in Calanus finmarchicus

Published online by Cambridge University Press:  11 May 2009

A. C. Gardiner
Get access Rights & Permissions [Opens in a new window]

Extract

One hundred and twenty-one specimens of Calanus finmarchicus were anæsthetised in a dilute solution of Urethane (2·5 grms. in 100 c.c. of seawater) and the time taken by each to sink through a measured distance determined. The length of each specimen, in millimetres, was noted, and the relationship between sinking time and length of the individual was determined. The coefficient of correlation, r, was found to be —0·63.

Apstein (1910, p. 23), working with preserved material, found that the time taken by adult Calanus was less than that taken by young. He does not give actual length measurements. Eyden (1923, p. 53) showed that for anaesthetised specimens of Daphnia pulex, the average rate of fall was approximately twice as great in specimens of length 2·5–3·0 mm. as in smaller ones, whose length varied from 1·5–2·0 mm.

The position in which specimens sank was conditioned by the manner in which the antennæ were held. It was found, however, that this had not as great an influence on the sinking rate as might have been expected.

Of the 121 specimens examined, 21 were in Stage IV, 41 in Stage V; 59 were adult, of which 54 were females and only 5 were males.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 18 , Issue 2 , January 1933 , pp. 575 - 610
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

Apstein, C.Hat ein Organismus in der Tiefe gelebt in der er gefischt ist? Intermit. Rev., Bd. III, 1910–1911.Google Scholar
Eyden, D.Specific Gravity as a Factor in the Vertical Distribution of Plankton. Proc. Cambridge Philos. Soc., Vol. I, No. 1, 1923.Google Scholar
Farran, G. P.Copepoda. Cons. Int. Expl. de la Mer., Extrait du Bulletin Trimestriel, II (1902–1908), 1911.Google Scholar
Gardiner, A. C.The Validity of Single Vertical Hauls of the International Net in the Study of the Distribution of the Plankton. Journ. Mar. Biol. Assoc., N.S., Vol. XVII, No. 2, 1931.Google Scholar
Hardy, A. C.The Herring in Relation to its Animate Environment. II. Fishery Investigations (England). Series II, Vol. VIII, No. 7, 1925.Google Scholar
Lebour, M. V.Stages in the Life-History of Calanus finmarchicus (Gunnerus). Journ. Mar. Biol. Assoc., N.S., Vol. XI, 1916–1918.Google Scholar
Russell, F. S.The Vertical Distribution of Marine Macroplankton. An Observation on Diurnal Changes. Journ. Mar. Biol. Assoc., N.S., Vol. XIII, No. 4, 1925.Google Scholar
Russell, F. S.The Vertical Distribution of Marine Macroplankton. An Observation on Diurnal Changes. Journ. Mar. Biol. Assoc., N.S., IV. Journ. Mar. Biol. Assoc., N.S. Vol. XIV, No. 2, 1926.Google Scholar
Russell, F. S.The Vertical Distribution of Plankton in the Sea. Biolog. Reviews, Vol. II, No. 3, 1927.Google Scholar
Russell, F. S.The Vertical Distribution of Marine Macroplankton. V. Journ. Mar. Biol. Assoc., N.S., Vol. XIV, No. 3, 1927.Google Scholar
Russell, F. S.The Vertical Distribution of Marine Macroplankton. VI. Journ. Mar. Biol. Assoc., N.S., Vol. XV, No. 1, 1928.Google Scholar
Russell, F. S.The Vertical Distribution of Marine Macroplankton. VII. Journ. Mar. Biol. Assoc., N.S., Vol. XV, No. 2, 1928.Google Scholar
Russell, F. S.The Vertical Distribution of Marine Macroplankton. X. Journ. Mar. Biol. Assoc., N.S., Vol. XVII, No. 2, 1931.Google Scholar
Russell, F. S.The Vertical Distribution of Marine Macroplankton. XI. Journ. Mar. Biol. Assoc., N.S., Vol. XVII, No. 3, 1931.Google Scholar
Savage, R. E.The Relation between the Feeding of the Herring off the East Coast of England and the Plankton of the surrounding waters. Fishery Investigations (England), Series II. Vol. XII, No. 3, 1931.Google Scholar
Southern, R., and Gardiner, A. C.A Preliminary Account of some Observations on the Diurnal Migration of the Crustacea of the Plankton of Lough Derg. Internat. Rev. d. g. Hydrobiol. u. Hydrogr., Bd. XV, Heft 5/6, 1926.Google Scholar
Southern, K., and Gardiner, A. C.The Diurnal Migrations of the Crustacea of the Plankton of Lough Derg. Proc. Roy. Irish Acad., Vol. XL, Section B, No. 11, 1932.Google Scholar
Wharton, Sir J. W. L., and Field, Sir MostynHydrographical Surveying. London, 1920.Google Scholar
Worthington, E. B.Vertical Movements of freshwater Macroplankton. Internat. Rev. d. g. Hydrobiol. u. Hydrogr., Bd. XXV, Heft 5/6, 1931.Google Scholar