Effects of Sargassum ilicifolium (Sargassaceae, Phaeophyceae) Meal on Physico- Chemical Formulated Shrimp (Litopenaeus vannamei) Feed

Almost 309 species and infraspecifictaxa of macroalgae including 78 Chlorophyta (within 15 families), 70 Ochrophyta (Phaeophyceae; within 7 families) are and161 Rhodophyta (within 30 families) listedin coastal line of the Persian Gulf and iranian water of Oman Sea. Among them, Sargassum ilicifolium, a dominant brown seaweed,which was used as a part of aquaticanimal feed in order to investigate its effecton physico chemical formulated feed. Two isocaloric diets (336 kcal metabolizable energy/100g diet) containing 33% crude protein,with and without inclusion of brown seaweed S. ilicifilium (0 and 15, replacedon protein resources of shrimp diet) were used. Seaweed supplement in formulated feed not only improved the humidity absorbance(110.20%±5.00%) and stability of pellet feed in seawater (98.11±3.23%) compared to the control but also acted as the best binder and increased the periods of leaching pellet (5.20±0.50) when they were dropped in seawater. It can be replaced instead of vitamin and mineral premixes when the feed is enriched by vitamin pyridoxine (6.4mg.100^-1 seaweed DW) and minerals cobalt (0.06 mg.100^-1 seaweed DW) and zinc (1.1mg.100^-1 seaweed DW).