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JOURNAL OF PLANKTON RESEARCH | VOLUME 15 | NUMBER 1 | PAGES 57-65 | 1993
© Oxford University Press

research-article

Metering filtration efficiency of freshwater zooplankton hauls: reminders from the past

Donald J. McQueen1 and Norman D. Yan1,2

1Department of Biology, York University 4700 Keele Street, Downsview, Ontario, M3J IP3 2Department of Ontario Ministry of the Environment, Water Resources Branch, Dorset Research Centre PO Box 39, Dorset, Ontario, POA 1E0, Canada

Received on April 14, 1992; accepted on October 1, 1992 While the importance of determining the filtration efficiency of plankton nets has been recognized for decades, a survey of recent literature indicates that freshwater zooplankton ecologists rarely mount flow meters in their plankton nets. As a reminder of the hazards of this omission, we document larger inter- and intra-annual variability in plankton net filtration efficiency in a 10 year data set from an oligotrophic Canadian Shield lake. We also experimentally demonstrate the influence of net design (i.e. open area ratio), haul speed, stall speed and zooplankton community structure on net filtration efficiency.


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