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Dependence between temperature and clearance rate of Balanion comatum Wulff

Rychert K.

Oceanologia

2011

No. 53 (2)

623-629

The dependence between temperature and clearance rate of the ciliate Balanion comatum Wulff 1919 was assessed in the coastal zone of the southern Baltic Sea. Five in situ experiments were carried out with the use of wheat starch as a surrogate of food particles. The clearance rate rose from 1.4 to 7.0 μl cell-1 h-1 with a temperature rise from 8 to 19°C. B. comatum preferred particles of size 1.9-4.4 μm, and the clearance rates calculated for the preferred particles were consistently higher than those measured for the whole range of particles ingested (Wilcoxon's signed rank test, p = 0.04). The exponential dependence between temperature and clearance rates for preferred particles was statistically significant (R2 = 0.86, p = 0.02) and enabled the Q10 coefficient to be calculated. This amounted to 2.9 and lay within the range of typical values. The linear dependence (also drawn for preferred particles) demonstrated a higher significance (R2 = 0.91, p = 0.02), indicating the linear dynamics of the process.

Particle size selectivity of two marine ciliates - Balanion comatum Wulff and Strombidium sp.

Rychert K.

Polish Journal of Ecology

2008

Vol. 56, nr 2

251-257

Food selectivity of marine ciliates Balanion comatum Wulff and Strombidium sp. (mean size of cell 19 [mi]m) were studied in situ during incubation with wheat starch particles as a surrogate food. Range of particles ingested by Balanion comatum was 1.25-7.50 [mi]m with preference for 3.75 [mi]m particles (statistically significant result). Strombidium sp. engulfed particles ranging from 1.25 [mi]m to 5.00 [mi]m also with preference for 3.75 [mi]m particles. In the Baltic Sea size range of particles preferred by both ciliates is dominated by nanoflagellates.