PENGARUH PEMBERIAN PAKAN ALAMI Tetraselmis chuii DAN Skeletonema costatum TERHADAP KANDUNGAN ASAM LEMAK OMEGA 6 (ASAM ARAKHIDONAT) PADA KERANG TOTOK Polymesoda erosa THE INFLUENCE OF NATURAL FOOD Tetraselmis chuii AND Skeletonema costatum ON THE PROFILE OF THE UNSATURATED FATTY ACID IN MARSH CLAM Polymesoda erosa - Supriyantini, Endang (Magister Manajemen Sumberdaya Pantai UNDIP, 2007)