Studi pembesaran tiram (Crassostrea sp) melalui desain tata letak yang berbeda

Tiram (Crassostrea sp) merupakan salah satu bivalvial potensial yang dapat dikembangkan dalam rangka meningkatkan pendapatan ekonomi. Tata desain media budidaya tiram yang baik akan mempengaruhi pertumbuhan dan kelangsungan hidup tiram. Penelitian ini bertujuan untuk melihat tata desain media budidaya tiram yang baik sehingga mempengaruhi pertumbuhan dan kelangsungan hidup tiram. Penelitian ini dilaksanakan di Keramba Jaring Apung Loskala Lhokseumawe dan di Laboratorium Hatchery dan Teknologi Reulet Program Studi Budidaya Perairan Fakultas Pertanian Universitas Malikussaleh dari bulan Juni sampai Agustus 2015. Adapun perlakuannya yaitu metode peletakkan benih tiram secara rak (horizontal), gantung (vertikal) dan didasar perairan dengan substrak batuan. Adapun rancangan yang digunakan pada penelitian ini adalah Rancangan Acak Lengkap (RAL) dengan 3 ulangan dan 3 perlakuan dan dilanjutkan dengan uji Beda Nyata Terkecil (BNT) jika terdapat perbedaan. Parameter yang diamati adalah kelangsungan hidup, pertambahan panjang, lebar, ketebalan cangkang, pertambahan bobot dan kualitas air. Pertambahan bobot, lebar, panjang, dan ketebalan cangkang tertinggi terdapat pada perlakuan B yaitu dengan nilai rata-rata sebesar 42,95 gram, 1,331 mm, 1,487 mm, 1,843 mm dan pertambahan bobot, lebar, panjang, dan ketebalan cangkang terendah terdapat pada perlakuan C yaitu 0,00 gram dan 0,00 mm. Rata-rata kelangsungan hidup yaitu 84% pada perlakuan A dan B, 0% pada perlakuan C. parameter kualitas air berada pada kisaran yang baik untuk pertumbuhan tiram dalam kisaran suhu 27 - 30 oC, pH 6,8 - 7,5 , dan DO 4,8 - 7,4 ppm.Oysters (Crassostrea sp) is one of the bivalves that is potential to be developed for improving the economic income. The good layout design for culturing oyster will affect its growth and survival. This study aimed to evaluate the layout design which was good for oyster cultivation affecting the growth and survival of oyster. This research was conducted at floating cage Loskala,  Lhokseumawe and in Hatchery and Technology Laboratory, Aquaculture Department, Agriculture Faculty Malikussaleh University fwhich was held on June to August 2015. The treatments were to use rack method (horizontal), hanging (vertical) and bottom methods. Completely randomized design (CRD) was used as research design with three replication for three treatments. Then it was continued by LSD (Least Significant Difference) Test,if there was a difference.Parameters measured were survival length, width, thickness of the shell, weight and water quality.The highest weight, width, length, and thickness of shell were obtained in treatment B which were 42,95 gram; 1,331 mm, 1,487 mm, 1,843 mm. other wise, the lowest one were obtained in treatment C which were 0 gram and 0 mm.The survival rate of both treatment A and B was 89%, which treatment C was 0%. water quality parameters were in good range for growth of oysters where as temperature 27-30 ° C, pH 6,8 to 7,5, and DO 4,8 to 7,4 ppm.