Abstract
The algal biomass ingested by omnivorous cyclopoid copepods (Cyclops kolensis and C. vicinus) was measured by two methods in the hypertrophic Heiligensee in Berlin (West Germany). The clearance and ingestion rates inferred from measurements of natural populations of 14C labelled phytoplankton were compared with those obtained from chlorophyll a determinations using the presence/absence method (observed chlorophyll a content of natural lake phytoplankton with and without addition of cyclopoids). Both methods gave similar results. Nevertheless, the radio tracer method is preferred, mainly because the short feeding duration excludes high variations in both the food composition and food concentration that limit the presence/absence method.
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Adrian, R. Filtering and feeding rates of cyclopoid copepods feeding on phytoplankton. Hydrobiologia 210, 217–223 (1991). https://doi.org/10.1007/BF00034680
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DOI: https://doi.org/10.1007/BF00034680