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XXI.—The Specific Gravity of Calanus finmarchicus

Published online by Cambridge University Press:  11 June 2012

F. Gross
Affiliation:
Department of Zoology, University of Edinburgh.
J. E. G. Raymont
Affiliation:
Department of Zoology, University of Edinburgh.
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Extract

In the course of our studies of reproduction of Calanus finmarchicus under laboratory conditions we noticed that all the eggs produced in our cultures were lying on the bottom of the glass dishes, and when transferred into fresh culture medium (“Erdschreiber”) or sea-water sank down relatively very rapidly. As the eggs were fertilised and healthy, and a large proportion of them developed into active nauplii (Raymont and Gross, 1942), it was obvious that the density of the living egg was considerably higher than that of sea-water.

Type
Research Article
Copyright
Copyright © Royal Society of Edinburgh 1942

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References

References to Literature

Apstein, C., 1910. “Hat ein Organismus in der Tiefe gelebt, in der er gefischt ist?Int. Rev. ges. Hydrobiol. Hydrgr., vol. iii, p. 17.CrossRefGoogle Scholar
Bogorov, B. G., 1934. “Seasonal Changes in Biomass of Calanus finmarchicus in the Plymouth Area in 1930,” Journ. Mar. Biol. Ass., vol. xix, p. 585.CrossRefGoogle Scholar
Eyden, D., 1923. “Specific Gravity as a Factor in the Vertical Distribution of Plankton,” Proc. Camb. Philos. Soc., Biol. Sci., vol. 1, p. 49.Google Scholar
Farran, G. P., 1927. “The reproduction of Calanus finmarchicus off the South Coast of Ireland,” Journ. du Conseil, vol. ii, p. 132.CrossRefGoogle Scholar
Gardiner, A. C., 1933. “Vertical Distribution in Calanus finmarchicusJourn. Mar. Biol. Ass., vol. xviii, p. 575.CrossRefGoogle Scholar
Giesbrecht, W., 1892. “Pelagische Copepoden,” XIX. Monographie in Fauna und Flora des Golfes von Neapel.Google Scholar
Heilbrunn, L. V., 1926. “The absolute viscosity of protoplasm,” Journ. Exper. Zool., vol. xliv, p. 255.CrossRefGoogle Scholar
Kraefft, F., 1910. “Ueber das Plankton in Ost- und Nordsee und den Verbindungsgebieten, mit besonderer Berücksichtigung der Copepoden,” Wiss. Meeresunters. Kiel, 11, p. 29.Google Scholar
Lowndes, A. G., 1938. “The density of some living aquatic organisms,” Proc. Linn. Soc. London, Session 150, 19371938, Pt. 2.CrossRefGoogle Scholar
Lyon, E. P., 1907. “Results of Centrifugalizing Eggs. I. The Specific Gravity of Eggs and the Changes in Specific Gravity occurring during Development,” Arch. Entw. mech., vol. xxiii, p. 151.Google Scholar
Marshall, S. M., 1933. “On the Biology of Calanus finmarchicus. II. Seasonal Variations in the Size of C. finmarchicus in the Clyde Sea-Area,” Journ. Mar. Biol. Ass., vol. xix, p. 111.CrossRefGoogle Scholar
Marshall, S. M., Nicholls, A. G., and Orr, A. P., 1934. “On the Biology of Calanus finmarchicus. V. Seasonal Distribution and Chemical Composition in Loch Striven in 1933, and their Relation to the Phytoplankton,” Journ. Mar. Biol. Ass., vol. xix, p. 793.CrossRefGoogle Scholar
Nicholls, A. G., 1933. “On the Biology of Calanus finmarchicus. III. Vertical Distribution and Diurnal Migration in the Clyde Sea-Area,” Journ. Mar. Biol. Ass., vol. xix, p. 139.CrossRefGoogle Scholar
Orr, A. P., 1934. “On the Biology of Calanus finmarchicus. IV. Seasonal Changes in the Weight and Chemical Composition in Loch Fyne,” Journ. Mar. Biol. Ass., vol. xix, p. 613.CrossRefGoogle Scholar
Ostwald, W., 1902. “Zur Theorie des Planktons,” Biol. Centralbl., vol. xxii, p. 597.Google Scholar
Parker, G. H., 1902. “The Reaction of Copepods to various Stimuli and the Bearing of this on the Daily Depth Migrations,” Bull. U.S. Fish. Comm. for 1901, p. 103.Google Scholar
Raymont, J. E. G., and Gross, F., 1942. “On the Feeding and Breeding of Calanus finmarchicus under Laboratory Conditions,” Proc. Roy. Soc. Edin., vol. lxi, B, pp. 267287.Google Scholar
Russell, F. S., 1927. “The Vertical Distribution of Plankton in the Sea,” Biol. Rev., vol. ii, pp. 213262.CrossRefGoogle Scholar
Russell, F. S., 1931. “The Vertical Distribution of Marine Macroplankton. XI. Further Observations on Diurnal Changes,” Journ. Mar. Biol. Ass., vol. xvii, p. 767.CrossRefGoogle Scholar