On the feeding of Eudiaptomus gracilis in Lake Balaton

P.-Zánkai, Nóra and Ponyi, Jenő (1974) On the feeding of Eudiaptomus gracilis in Lake Balaton. A Magyar Tudományos Akadémia Tihanyi Biológiai Kutatóintézetének évkönyve, 41. pp. 363-371. ISSN 0365-3005

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Abstract

The authors investigated the incorporation of Eudiaptomus gracilis collected in Lake Balaton. For feeding nine alga species obtained from pure cultures, labelled with Na¹⁴CO₃ were used. The activity incorporated was measured with liquid scintillation detector and the results were calculated by adapting Sorokin ’s assimilation index. It was established that Eudiaptomus gracilis incorporated Nitzschia communis, belonging to Diatomea, to the largest (33%), while Keratococcus caudatus and the Chlorella species to the lowest extent (3-4%). The optimal concentration of algae incorporated by Eudiaptomus gracilis begins at 0.3-0.4 mg C/l and the rate of incorporation becomes standard between 0.5 and 1.1 mg C/l.

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