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JOURNAL OF PLANKTON RESEARCH | VOLUME 12 | NUMBER 4 | PAGES 735-741 | 1990
© Oxford University Press

research-article

Food selection and growth of the planktonic ciliate Coleps hirtus isolated from a monomictic subtropical lake

Paolo Madonia, Tom Berman, Ora Hadas and Ricky Pinkas

The Yigal Alton Kinneret Limnological Laboratory P.O. Box345, Tiberias, Israel 14102

Received on January 19, 1990; accepted on March 22, 1990

A strain of Coleps hirtus (Ciliophora, Prorodontida) was isolated from the epilimnion of monomictic Lake Kinneret. Growth of this ciliate was tested in response to 12 species of planktonic algae and seven species of cultured bacteria from lake isolates which were offered as food. Eight species of algae (one Cryptophyceae and seven Chlorophyceae) and four bacteria supported good to excellent growth of C.hirtus. Growth rates (µ) and doubling times (DT) ranged from 0.008 to 0.029 h–1 and from 23.9 to 90.8 h respectively. C.hirtus was able to grow on bacteria at concentration levels as low as 2–8 x 105 cells ml–1. No correlation was observed between growth rate of C.hirtus and cell volume of the prey.

aPresent address: Istituto di Ecologia, Universita di Parma, 43100 Parma, Italy


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