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ARS Home » Southeast Area » Stuttgart, Arkansas » Harry K. Dupree Stuttgart National Aquaculture Research Cntr » Research » Publications at this Location » Publication #104979
Title: ZOOPLANKTON COLLECTION AND FRY CULTURE WITH A ROTATING DRUM FILTER.

Author
item Ludwig, Gerald
item LOCHMANN, STEVEN - UAPB
item JACKSON, MAURICE - UAPB

Submitted to: Book of Abstracts U.S. Chapter of World Aquaculture Society
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/23/2000
Publication Date: 2/2/2000
Citation: LUDWIG, G.M., LOCHMANN, S.E., JACKSON, M. ZOOPLANKTON COLLECTION AND FRY CULTURE WITH A ROTATING DRUM FILTER.. BOOK OF ABSTRACTS U.S. CHAPTER OF WORLD AQUACULTURE SOCIETY. 2000. p.205.

Interpretive Summary:

Technical Abstract: Rotating drum filters appear to offer much potential for assisting in the culture of zooplankton-dependent fish fry. While a filter with pores of 60um selects zooplankton suitable for most of the tiniest fish fry, the use of filters with larger pores or filters of different pore size in tandem allows tailoring the zooplankton collected to that required by particular fry species. Large, predatory zooplankton or species that would foul culture tanks may also be eliminated by this process. Preliminary studies indicate that a culturist may also obtain desired types and/or sizes of zooplankton by coordinating filtration (and fry stocking) with pond management practices that considers successional and seasonal changes of zooplankton community. Initial studies with a drum filter (Hydrotech 501, Water Management technologies, Inc, Port Allen LA) indicated that large changes in concentration rates may occur and are variable according to zooplankton type and pumping rates. Since output from the filter is constant, highest concentrations of zooplankton are usually obtained by keeping input near the filters highest capacity. Maximum capacity for this filter is estimated at 456 LPM and the output rate is a nearly constant, 10.2 LPM Maximum concentration rates of 100 for cladocerans, 900 for copepods 650 for copepod nauplii and 1000 for rotifiers were obtained with pumps delivering about 246 LPM.