Abstract

Abstract A method for harvesting live zooplankton with a modified propellor-lift pump was tested in nine 0.1-acre unfertilized hatchery ponds. As judged by live-weight estimates of zooplankton harvested, collecting zooplankton at night with a light suspended over the pump intake was more effective than collecting them at night without the light or during the day. This method should be convenient and economical for collecting large quantities of live zooplankton from hatchery ponds.

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