Abstract
Incubations of natural populations of phytoplankton were carried out in neritic and oceanic areas of the western subarctic Pacific in 1991 and 1992. Algae in the order Parmales, class Chrysophyceae, were observed to increase in number during the incubations. In the light-exposed treatments, the growth rate of Parmales at 5 to 12 °C was 0.012 to 0.016 h-1 or 0.41 to 0.54 doubling d-1, which is lower than that of diatoms, but comparable to that of common dinoflagellates. On the other hand, heterotrophic choanoflagellates grew positively in both light and dark at the rate of 0.016 to 0.040 h-1 or 0.54 to 1.39 doublings d-1, which is comparable or lower than the reported value at 15 °C. The results obtained demonstrate that the Parmales can grow vegetatively in light and prefer low temperatures.
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Communicated by T. Ikeda, Hiroshima
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Taniguchi, A., Suzuki, T. & Shimada, S. Growth characteristics of Parmales (Chrysophyceae) observed in bag cultures. Marine Biology 123, 631–638 (1995). https://doi.org/10.1007/BF00349241
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DOI: https://doi.org/10.1007/BF00349241