الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Global aquaculture production plays a significant role in contributing to food security and economic development. Availability of quality feeds in the suitable amount is very necessary to meet the future demand for food from aquaculture. Sea bass is carnivorous fish and it is considered an important aquaculture species cultured in ponds of brackish and freshwater and in cages. Fish consider very efficient protein converters as fish protein usually represents 65-85% of the dry matter of fish body. Lipids are important components of fish diets as lipid provide concentrated source of energy. The objectives of the study were to evaluate the growth performance and whole body composition of growing E. Sea bass cultured in marine water farm and fed commercial fish diets containing high protein and fat content. The study was carried out with E. Sea bass in a private marine water fish farm at Damietta-Port Said road. The farm is about 12 Fadden with 8-ponds (120 m length x 40 m width x 1.25 m depth). Initial mean body weight (BW) of E. Sea bass is about 25 g (22.5-27.1 g). Fish feeding and management were followed for 6 months. Daily feed intake was introduced to fish at 4.6% to 1.02% of relative BW/fish/pond. Fish were fed once daily (at 7:00 AM) during the period from June to October 2018 and twice daily (at 7:00 AM and 14:00 PM) at winter, during November 2018 under the supplementary feeding system. Every month, feed allowance was estimated and adjusted after fish weighing. Ponds were watched daily for any mortalities and any dead fish was weighed and discarded. The high protein diet (42.3%) fed during the first 2 months, in the second 2 months a 40.42% CP diet was fed , while diets fed in the last 2 months contained 39.60% CP. Fish samples (n=20 from each pond) were collected at the end of each month to follow up growth parameters. Fish samples collected (4 from each pond) at the end of the fourth and the sixth months for whole body composition determination. Generally, There was a little decrease in moisture percentage of whole fish body with an increase in fish size (67.8 vs 69.10%) with a little increase in protein content (18.55 vs 17.82%) of the Sea bass whole body composition, also fat content increased from 7.94 to 9.25% .Carcass or dressed fish wt., dressed %, fillet yield % and K- factor markedly improved with increasing the fish size at the end of feeding trial. from the present study, feeding diets containing about 42 to 40 % protein with 17.6 % fat produced good remarkable growth of E .Sea bass cultured in marine water fish farm under the supplementary feeding system.