Microzooplankton (the 20 to 200 µm size class of zooplankton) is recognised as an important part of marine pelagic ecosystems. In terms of biomass and abundance pelagic ciliates are one of the important groups of organism in microzooplankton. However, their rates - grazing and growth - , feeding behaviour and prey preferences are poorly known and understood. A set of data was assembled in order to derive a better understanding of pelagic ciliates rates, in response to parameters such as prey concentration, prey type (size and species), temperature and their own size. With these objectives, literature was searched for laboratory experiments with information on one or more of these parameters effect studied. The criteria for selection and inclusion in the database included:(i) controlled laboratory experiment with a known ciliates feeding on a known prey;(ii) presence of ancillary information about experimental conditions, used organisms - cell volume, cell dimensions, and carbon content. Rates and ancillary information were measured in units that meet the experimenter need, creating a need to harmonize the data units after collection. In addition different units can link to different mechanisms (carbon to nutritive quality of the prey, volume to size limits).As a result, grazing rates are thus available as pg C/(ciliateh), µm3/(ciliateh) and prey cell/(ciliate*h); clearance rate was calculated if not given and growth rate is expressed as the growth rate per day.

The "Download dataset" link provides a zip-archiv containing the database, archived in 4 different formats: Excel 97-2004 (.xls, original format as provided by author), Office Open XML/Excel 2011 (.xlxs), tab-delimited text/ascii (.txt), and comma separated values (.csv).This work was funded by Eur-Oceans program, project number WP3.2-SYS-1092.