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Ciliate growth rates from Plymouth Sound: comparison of direct and indirect estimates

Published online by Cambridge University Press:  09 October 2019

R.J.G. Leakey ,
P.H. Burkill  and
M.A. Sleigh
R.J.G. Leakey
Affiliation:
Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, PL1 3DH. Department of Biology, University of Southampton, Medical and Biological Sciences Building, Bassett Crescent East, Southampton, SO9 3TU.
P.H. Burkill
Affiliation:
Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, PL1 3DH.
M.A. Sleigh
Affiliation:
Department of Biology, University of Southampton, Medical and Biological Sciences Building, Bassett Crescent East, Southampton, SO9 3TU.
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Abstract

The in situ growth rates of marine planktonic ciliates from Plymouth Sound were determined after fractionating the natural community into several size categories to remove predators of different sizes. Total community in situ growth rates varied from 0·01 to 0·57 d−1 according to fractionation treatment, with the four most abundant taxa, comprising three species of Strombidium, and Mesodinium rubrum, achieving maximum in situ growth rates of between 0·41 and 0·68 d−1. These values are approximately half the maximum theoretical rates calculated indirectly using an equation which relates ciliate growth to cell size and temperature. Given the conservative nature of in situ growth rate measurements, the growth rates reported here appear appropriate for a natural ciliate community growing within a nutritionally favourable environment.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 74 , Issue 4 , November 1994 , pp. 849 - 861
Copyright
Copyright © Marine Biological Association of the United Kingdom 1994

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