SUBSTITUTION EFFECT OF VARIOUS ANIMAL PROTEIN SOURCES FOR FISH MEAL IN DIET ON GROWTH PERFORMANCE AND FEED EFFICIENCY OF JUVENILE OLIVE FLOUNDER Paralichthys olivaceus

Dietary substitution effect of  various animal protein  sources for fish meal on growth and feed efficiency of olive flounder (Paralichthys olivaceus ) was investigated . The 65% fish meal was included in the control (Con) diet. Thirty percent fish meal in the Con diet was  substituted  with tuna byproduct meal, chicken byproduct meal, hydrolyzed chicken offal meal, meat meal, meat and bone meal and blood meal, referred to as  the TBM, CBM, HCOM, MM, MBM and BM diets, respectively.  The greatest weight gain and specific growth rate were obtained in fish fed the TBM diet, followed by the HCOM, CBM, Con, MBM, MM and BM diets, in that order. The greatest feed efficiency was obtained in fish fed the TBM diet. Thirty percent f ish meal could be replaced with tuna byproduct meal, chicken byproduct meal and  hydrolyzed chicken offal meal in juvenile olive flounder diet without retardation of growth performance.

Dietary substitution effect of  various animal protein  sources for fish meal on growth and feed efficiency  of juvenile olive flounder was investigated .  Sixty five percent  fish meal was  included  in the control (Con) diet.  Thirty percent fish meal in the Con diet was replaced with tuna byproduct meal, chicken byproduct meal, hydrolyzed chicken offal meal, meat meal, meat and bone meal and blood meal, referred to as the TBM, CBM, HCOM, MM, MBM and BM diets, respectively. Fish were fed with one of the experimental diets twice a day for 8 weeks.

G reatest weight gain  and SGR were obtained in fish fed the TBM diet, followed by the HCOM, CBM, Con, MBM, MM and BM diets, in that order (Table 1) . The greatest feed efficiency (FE) was obtained in fish fed the TBM diet. The greatest growth and FE were obtained in fish fed the TBM diet, followed by the HCOM and CBM diets, in that order.