Food selection and growth of the planktonic ciliate Coleps hirtus isolated from a monomictic subtropical lake |
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Authors: | Madoni Paolo; Berman Tom; Hadas Ora; Pinkas Ricky |
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Institution: | The Yigal Alton Kinneret Limnological Laboratory P.O. Box345, Tiberias, Israel 14102 |
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Abstract: | A strain of Coleps hirtus (Ciliophora, Prorodontida) was isolatedfrom the epilimnion of monomictic Lake Kinneret. Growth of thisciliate was tested in response to 12 species of planktonic algaeand seven species of cultured bacteria from lake isolates whichwere offered as food. Eight species of algae (one Cryptophyceaeand seven Chlorophyceae) and four bacteria supported good toexcellent growth of C.hirtus. Growth rates (µ) and doublingtimes (DT) ranged from 0.008 to 0.029 h1 and from 23.9to 90.8 h respectively. C.hirtus was able to grow on bacteriaat concentration levels as low as 28 x 105 cells ml1.No correlation was observed between growth rate of C.hirtusand cell volume of the prey.
aPresent address: Istituto di Ecologia, Universita di Parma,43100 Parma, Italy |
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