Abstract
Selection of particles ingested by planktonic rotifers was investigated using different-sized fluorescent latex beads (ca 0.05–10 μm diameter). Keratella cochlearis, Keratella quadrata, and Polyarthra dolichoptera preferred 1-2-μm diameter beads, whereas Synchaeta pedinata selected for 2-3-μm particles. However, the size-frequency distribution of beads ingested indicated great variability. The ‘incipient limiting level’ of particle concentration (ILL) for rotifers tested with 2-μm beads was high. Keratella cochlearis had the lowest ILL with 5 × 105 beads ml-1 and Synchaeta pedinata the highest with 1 × 106 beads ml-1. The clearance rate (CR) varied for all species between 0.1 and 0.4 μl ind.-1 h-1. Keratella cochlearis had the highest CR with 0.4 μl ind.-1 h-1 at food concentration of 5 × 105 beads ml-1. S. pectinata and P. dolichoptera had their maximum CR with 0.34 and 0.20 μl ind.-1 h-1, respectively, at 7.5 × 105 beads ml-1.
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Ronneberger, D. (1998). Uptake of latex beads as size-model for food of planktonic rotifers. In: Wurdak, E., Wallace, R., Segers, H. (eds) Rotifera VIII: A Comparative Approach. Developments in Hydrobiology, vol 134. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4782-8_57
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DOI: https://doi.org/10.1007/978-94-011-4782-8_57
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