On the seasonal fluctuation in the food incorporation of Eudiaptomus gracilis

P.-Zánkai, Nóra and Ponyi, Jenő (1974) On the seasonal fluctuation in the food incorporation of Eudiaptomus gracilis. A Magyar Tudományos Akadémia Tihanyi Biológiai Kutatóintézetének évkönyve, 41. pp. 357-362. ISSN 0365-3005

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Abstract

The authors investigated the incorporation, at different temperatures, of Eudiaptomus gracilis fed on two species of algae (Chlorococcum infusionum and Botrydiopsis minor) obtained from pure cultures. They established: 1. The rate of incorporation, fed on both species of algae, varied between 17-18% in August and October (temperature 10-18 °C). From February to mid-April this rate was only 1-2% (temperature 4-10 °C). 2. The rate of incorporation of the animals sampled in winter and kept to become acclimatized to the experimental temperature, does not change essentially (3.2%). 3. In the cold-water period, the rate of incorporation of Eudiaptomus gracilis in Lake Balaton was optimal a t a concentration of 0.2-0.4 mg C/l algae.

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