KALSIUM KARBONAT PADA MEDIA BERSALINITAS UNTUK PERTUMBUHAN BENIH IKAN PATIN (Pangasius sp.)

Pengembangan teknologi dan sistem produksi dalam bidang perikanan budidaya merupakan salah satu solusi utama bagi upaya peningkatan produksi perikanan terutama untuk mengatasi adanya kendala tentang ketersediaan benih ikan patin. Perbaikan kualitas benih patin diupayakan melalui penambahan kapur untuk ketersediaan mineral di perairan dan pengadaan media pemeliharaan bersalinitas 4 g/L yang bertujuan untuk menekan tingkat kerja osmotik sehingga mengurangi energi yang digunakan untuk osmoregulasi dan dapat dialokasikan untuk pertumbuhan ikan patin. Benih ikan patin yang digunakan berukuran 2,69±0,04 cm dengan bobot 0,08±0,01 g. Akuarium yang digunakan berukuran 30 x 15 x 25 cm sebanyak 15 unit dan diisi air bersalinitas 4 g/L sebanyak 9 liter per unit dan ditambahkan kapur CaCO3 sesuai perlakuan yaitu K (0 mg/L CaCO3) , A (150 mg/L CaCO3), B (200 mg/L CaCO3), C (250 mg/L CaCO3) dan D (300 mg/L CaCO3). Selama penelitian, ikan diberi pakan dengan kadar protein (28%) sebanyak 3 kali sehari dengan FR (5%). Perlakuan penambahan CaCO3 untuk semua perlakuan menghasilkan tingkat kelangsungan hidup sebesar 100% (P>0,05). Sedangkan laju pertumbuhan bobot harian masing-masing perlakuan secara berturut-turut yaitu (11.34%); (12.06%); (11.51%); (12.67%); dan (11.58%) (P>0,05). Panjang mutlak menghasilkan nilai berbeda nyata yaitu 2.84 cm; 3.62 cm; 3.23 cm; 3.79 cm; dan 3.28 cm (P<0,05). Selama penelitian, kualitas air berada dalam kisaran yang dapat ditoleransi oleh benih ikan patin. Penggunaan kapur CaCO3 pada salinitas 4g/L disarank sebanyak 250 mg/L CaCO3 dengan pergantian air secara berkala dan pemberian pakan yang cukup.The development of technology and production systems in the field of aquaculture is one of the primary solutions for increasing production to cope with the presence of fishing is mainly about stripped catfish seed. Seed quality improvement through lime addition for the availability of minerals in the water supply and maintenance of media in salinity 4 g/L which aims to suppress the level to support availability of employment of the inaugural thereby reducing energy used for osmoregulation and can be allocated to growth of catfish. Catfish seed size used was 2.69±0.04 cm and weight used was 0.08±0.01 g. Aquarium used measuring 30 x 15 x 25 cm by as much as 15 units and filled water in salinity 4 g/L as much as 9 litres per unit and added lime CaCO3 according treatment that was K (0 mg/L CaCO3), A (150 mg/L CaCO3), B (200 mg/L CaCO3), C (250 mg/L CaCO3) and D (300 mg/L CaCO3). For research, fish was fed on of a protein (28%) as much as 3 times a day by FR 5%. The addition of CaCO3 treatment for all treatment generated a level of survival as much as (100%) (P>0.05). While growth rate of weights daily each treatment in a consecutive manner that is (11.34%); (12.06%); (11.51%); 12.67%; and (11.58%) (P>0.05). Absolute value of different length produce 2.84 cm; 4.63 cm; 3.23 cm; 3.79 cm; and 3.28 cm (P>0.05). During the research, the quality of the water was in the range that can be tolerated by the seed of catfish. The use of lime CaCO3 on salinity 4 g/L recommended as much as 250 mg/L CaCO3 with a turn of the water at regular intervals and feeding