Submitted to: Book of Abstracts U.S. Chapter of World Aquaculture Society
Publication Type: Abstract Only
Publication Acceptance Date: December 15, 1999
Publication Date: February 2, 2000
Citation: LUDWIG, G.M. CULTURE OF SUNSHINE BASS MORONE CHRYSOPS X M SAXATILIS FRY IN TANKS WITH ZOOPLANKTON CROPPED FROM PONDS.. BOOK OF ABSTRACTS U.S. CHAPTER OF WORLD AQUACULTURE SOCIETY. 2000. p.205. Technical Abstract: Sunshine bass, Morone chrysops X C. saxatilis, fry were stocked into 260 L tanks at age 4 days at 20/L and harvested 21 days later. Zooplankton collected with a drum filter from ponds managed to maximize rotifer densities at the time of filtration were fed to the fry at rates of 10, 20, or 30 zooplankton/mL once per day with three replicates of each treatment. The zooplankton were retained by a 60 um filter. The fry also received microencapsulated, 50% protein fry feed at 1 g/2.4 hr. At harvest, mean survival rates of 3.31%, 14.2%, and 23.3% varied directly with zooplankton feeding rates. Fry from the 30 zooplankton/mL treatment survived at a significantly higher rate than fry from the 10 zooplankton/mL treatment. Average total lengths of fry, 8.24 mm, 8.15mm, and 7.66 mm, were inversely reltated to survival with fry from the 30 zooplankton/mL treatment being significantly smaller than fry from the other treatments. The experiment showed that fry could be raised in tanks with zooplankton harvested from ponds with a drum filter.