Abstract
MANY planktonic species show marked responses to changes in hydrostatic pressure1–3, but there has been some doubt about the behaviour of Calanus in this respect. Field observations by Hardy and Paton4 suggested that the behaviour of Calanus finmarchicus might be affected by the change of pressure with depth, but laboratory experiments by Hardy and Bainbridge1 and by Knight-Jones and Qasim2 failed to confirm this. Recent books and reviews5–10 have stressed the apparent absence of a demonstrable pressure response in Calanus.
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References
Hardy, A. C., and Bainbridge, R., Nature, 167, 354 (1951).
Knight-Jones, E. W., and Qasim, S. Z., Nature, 175, 941 (1955).
Baylor, E. R., and Smith, F. E., in Recent Advances in Invertebrate Physiology, edit. by Scheer, B. T., 21 (University of Oregon Publications, 1957).
Hardy, A. C., and Paton, W. N., J. Mar. Biol. Assoc., 26, 467 (1947).
Hardy, A. C., in Essays in Marine Biology, 101 (Oliver and Boyd, Edinburgh, 1953).
Marshall, S. M., and Orr, M. A., The Biology of a Marine Copepod (Oliver and Boyd, Edinburgh, 1955).
Hardy, A. C., The Open Sea: Its Natural History. I. The World of Plankton. New Naturalist Series. (Collins, London, 1956).
Carthy, J. D., An Introduction to the Behaviour of Invertebrates (Allen and Unwin, London, 1958).
Nicol, J. A. C., The Biology of Marine Animals (Pitman, London, 1960).
Bainbridge, R., in The Physiology of Crustacea, edit. by Waterman, Talbot H., 2, 431 (Academic Press, New York, 1961).
Digby, P. S. B., Nature, 191, 366 (1961).
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RICE, A. Responses of Calanus finmarchicus (Gunnerus) to Changes of Hydrostatic Pressure. Nature 194, 1189–1190 (1962). https://doi.org/10.1038/1941189a0
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DOI: https://doi.org/10.1038/1941189a0
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