THE USE OF CORN GLUTENMEAL ASA PARTIAL REPLACEMENT FOR FISH MEAL IN DIETS OF SEA BASS (DICENTRARCHUS LABRAX) FRY

THE USE OF CORN GLUTENMEAL ASA PARTIAL REPLACEMENT

FOR FISH MEAL IN DIETS OF SEA BASS

(DICENTRARCHUS LABRAX) FRY

By
El-E.BlARYE.H *, MA. ZAKI, AND HA MABROOK
“National Institute ofOceanography and FISheries. Qayed Bay, Alexandria, Egypt
Key words: Sea bass, fish meal, com gluten meal, growth performance, feed
utilization.
ABSTRACT
This experiment was conducted to’ evaluate corn gluten meal (CGM) as
an alternative protein source for fish meal in the diet of Sea bass
Dicentrarchus labrax Jry. Fish with an average initial body weight of
O. 58=:.0. 002g were stocked into ten glass aquaria (l00 X 30 X40 em). Each
tank contains 100 liter of seawater and was stocked with ten fish. Fiv.e
isonitroaenous diets (55% crude protein) containing different levels of
CGM, were jed three times daily, 6 days a weekfor 84 days. Growth, feed
and nutrient utilization ofSea bass fry Dicentrarchus labrax fed the diets
replacing 40 % ojFM by ubstitution CGMprotein were not statistically
different from those ojfish fed the control diet (containing 75% fish meal
as a sole protein source). All parameters ofgrowth and feed utilizationjor
fish fed the diet replacing 60% offish meal protein by CGiVf protein were
significantly lower than thatfed the control diet (P< 0.05). Supplements of clystalline amino acids to the CGM diet improved the nutritive value ofthe diet. Since substiiution up to 40% did not adversely affect whole body composition of the cultured fish. Survival rates offish~ranged from 90 to 100%, it is suggested that up to 40% offish meal protein can be replaced with CGM in the diet ofSea bass fry.