ISRAELI JOURNAL OF AQUACULTURE-BAMIDGEH, vol.57, no.1, pp.49-61, 2005 (SCI-Expanded)
The use of poultry by-product meal as an alternate dietary protein for Black Sea turbot
Scophthalmus maeoticus (initial avg wt 18 g) in winter was evaluated. Triplicate groups of 15 fish
were fed one of five isoenergetic (gross energy 20.5±0.21 kJ/g) and isonitrogenous (protein content
55±0.35%) diets with 25%, 50%, 75%, or 100% of the fishmeal protein replaced by poultry
by-product protein. White fishmeal was the sole protein source in the control diet. There was no
significant (p<0.05) reduction in growth performance of the turbot fed the 25% replacement diet
compared to the control diet (100% fishmeal). At the replacement levels of 50%, 75%, and
100%, however, there was a severe decrease in feed intake, growth performance, feed utilization,
protein efficiency ratio, and apparent net protein utilization. Results indicate that up to 25%
of the fishmeal protein can be replaced by poultry by-product meal with no negative effects in
fish performance at temperatures ranging 6-8°C.