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Title: PARALLEL CAGE AND AQUARIUM STUDIES OF NILE TILAPIA (OREOCHROMIS NILOTICUS) FED DIETS RICH IN CORN-DERIVED ETHANOL COPRODUCTS

Author
item Wu, Ying Victor
item ROSATI, RONALD - TEXAS A&M UNIVERSITY
item BROWN, PAUL - PURDUE UNIVERSITY

Submitted to: Annual Meeting World Aquaculture Society
Publication Type: Abstract Only
Publication Acceptance Date: 2/20/1997
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Earlier feeding studies with Nile tilapia (Oreochromis niloticus) utilized diets containing up to 29% corn-derived, protein-rich, ethanol coproducts and solely examined fish fed in cages. The purpose of this study was two-fold: First, to compare growth responses of tilapia fed four experimental diets containing greater amounts of ethanol coproducts (54 to 67%) to a suitable commercial control diet; second, to cross compare growth responses of fish fed in cages versus those fed in aquaria. When each of the five diets in aquaria was compared with the corresponding diet in cages, the same weight gain (WG) and feed conversion ratio (FCR) were obtained, and four out of five protein efficiency ratios (PER) were the same (P>0.05) after 42 days. After 88 days of aquaria feeding, the control diet resulted in a higher WG than the four experimental diets, but had the same FCR. Three out of four experimental PER values were the same as the commercial control. For cage studies, the control diet again resulted in a higher WG than the four experimental diets, but had a lower FCR than three out of four experimental diets. The cage PER values for three out of four experimental diets were the same as their control. When each of the four experimental diets and control diets in aquaria were compared with their corresponding diet in cages, three out of five diets resulted in the same WG, four out of five diets resulted in the same FCR and three out of five diets resulted in the same PER.