[ Abstract ]

Brackish water of tilapia is a fish type which has the superior resistance against the high or even above 20 ppt. At present, saline tilapia hatchery has currently face the constraint in providing seed due to the high level of death of the larvae. The factor of feed during the larvae care stage is the determining factor for the survival of the larvae. This research aimed to determine the correct carotenoid dosage in the rotifer and artemia woof which could affect the growth rate, survival and stress resistance of the brackish water of tilapia. This research used Complete Random Design (CRD) with 4 treatments of carotenoid dosage (0, 5, 10 and 15 mg/L water media) and each three replications. Larvae brackish water were reared during 20 days in 50 L silinder plastic in 12 units equipped by filter system. Giving 300.000 ind/L rotifers and 500.000 ind/L nauplius. The artemia was frequency twice a day such as at 08.00 and 17.00 o’clock WITA. The result showed that the highest rotifer carotenoid content like 8,30 ppm was in the treatment of 10 mg/L dosage, the highest artemia carotenoid content was 10,367 ppm was in the treatment of 10 mg/L dosage and the highest larvae  tilapia of brackish water carotenoid content like 3,756 ppm was in the treatment of 10 mg/L. The survival rate the highest 88,00%, growth rate 1,730 and 0,107 and the highest resistance to stress content like 18,33, each contained of 10 mg/L dosage. Dose of 10 mg/L carotenoids were able to be absorbed and converted into vitamin A by the larvae so as to increase of survival rate, growth rate and resistance to stress of larvae nila of brackish water.

 

Keywords: Artemia, carotenoid, rotifer, brackish water of tilapia


[ Abstrak ]

Ikan nila air payau merupakan jenis ikan unggul tahan terhadap salinitas tinggi hingga di atas 20 ppt. Pembenihan nila air payau saat ini ditemukan kendala dalam penyediaan benih yakni tingkat kematian pada fase larva. Faktor pakan dalam tahap pemeliharaan larva sebagai penentu tingkat kelangsungan hidup larva. Penelitian ini bertujuan untuk menentukan dosis karotenoid yang tepat pada pakan rotifer dan artemia terhadap laju pertumbuhan, kelangsungan hidup dan ketahanan stress larva nila air payau. penelitian ini menggunakan Rancangan Acak Lengkap (RAL) dengan 4 perlakuan dosis karotenoid (0 mg/L, 5mg/L,10mg/L dan 15 mg/L air media) dan masing-masing 3 ulangan. Larva nila air payau dipelihara selama 20 hari dalam wadah plastik berbentuk bundar dengan volume 30 L berjumlah 12 unit masing-masing dilengkapi dengan sistem filterisasi. Pemberian pakan rotifer 300.000 ind/L dan nauplius artemia 500.000 ind/L dengan frekuensi pemberian pakan 2 kali sehari yaitu pada pukul 08.00 dan 17.00 WITA. Hasil penelitian menunjukkan kandungan karotenoid rotifer tertinggi yaitu 8,30 ppm terdapat pada dosis 10 mg/L, kandungan karotenoid artemia tertinggi yaitu 10,637 ppm terdapat pada dosis 10 mg/L dan kandungan karotenoid larva nila air payau tertinggi yaitu 3,756 ppm terdapat pada dosis 10 mg/L. Laju pertumbuhan panjang dan berat tertinggi yaitu 1.730 dan 0.107, kelangsungan hidup tertinggi yaitu 88,00 dan ketahanan stress tertinggi yaitu 18,33, masing-masing terdapat pada dosis karotenoid 10 mg/L. Dosis 10 mg/L karotenoid mampu diabsorbsi dan dirubah oleh larva menjadi vitamin A sehingga mampu meningkatkan laju pertumbuhan, kelangsungan hidup dan ketahananan stress larva nila air payau.

 

Kata kunci: Artemia, ikan nila air payau, karotenoid, rotifer.