ARS | Publication request: Intensive rotifer production system for Brachionus plicatilis

Submitted to: Caribbean and Latin American Aquaculture
Publication Type: Abstract Only
Publication Acceptance Date: July 1, 2007
Publication Date: October 7, 2007
Citation: Ludwig, G.M., Pfeiffer, T.J. 2007. Intensive rotifer production system for Brachionus plicatilis [abstract]. Caribbean and Latin American Aquaculture.p.99.

Technical Abstract: Tiny live zooplankton such as the brackish water rotifer, Brachionus plicatilis, are often required for the tank culture of many species of commercial fish. Previously, live phytoplankton was required to feed the rotifers. Algae culture is a time, space, and money consuming endeavor with cultures frequently being unstable. Maximum rotifer densities achieved were usually below 500/ml. Recent innovations have resulted in greatly increased culture density, elevated culture stability and reduced space requirements. Concentrated algae pastes of several varieties are now available in the marketplace, alleviating the need for separate algae cultures and their attendant labor, water, space, equipment and operating costs. Concentrated algae also reduces rotifer culture dilution during feeding and less risk of pH elevation. Lower pH reduces rotifer mortality from unionized ammonia presence. Products containing sodium hydroxymethanesulfonate (e.g. Chloram-X) also neutralize ammonia. Peristaltic pumps and timers allow for around-the-clock feeding. Supplying pure oxygen greatly increases the potential for high density culture. Fecal and other particulate matter removal is facilitated by use of filter materials. Rotifer concentrations of 4000/ml and over are achievable with stable production rates of 1500 rotifers/ml are expected. This system, in conjunction with Artemia cultures, has enabled us to produce in ten 100L tanks the equivalent of a half acre of pond produced sunshine bass.