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Counting and sizing preserved Daphnia with the Optical Plankton Counter

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons56763

Kessler,  Kirsten
Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons56790

Lampert,  Winfried
Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

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Zitation

Kessler, K., & Lampert, W. (2003). Counting and sizing preserved Daphnia with the Optical Plankton Counter. Archiv für Hydrobiologie, 156(4), 485-493. doi:10.1127/0003-9136/2003/0156-0485.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-DBFD-1
Zusammenfassung
Monospecific samples of preserved Daphnia hyalina were counted and sized by the bench-top version of the Optical Plankton Counter (OPC) and the results were compared to manual counts and size measurements. OPC and manual counts were in excellent agreement. Equivalent spherical diameters (ESD) provided by the OPC were slightly smaller than those calculated from microscopic measurements, but a constant correction of the ESD(OPC) by adding 80 mum resulted in good agreement between the sample means of ESD and biovolume for both methods. The OPC provides reliable counts and size distributions, which saves considerable time and effort in analyzing monospecific zooplankton samples.