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Pangasianodon hypophthtalmus (Sauvage 1878) pada sistem bPangasianodon hypophthalmus (Sauvage 1878) juvenile production using biofloc technology with different carbon sources
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Abstract
Intensive aquaculture system decreases water quality through the increment of metabolic waste products such as organic nitrogen. The biofloc technology is an alternative solution to avoid the impact of high nutrients disposal in aquaculture production system. This study aimed to evaluate the impacts of biofloc technology using different carbon sources on the production performance of juvenile striped catfish, Pangasianodon hypophthalmus. Completely randomized design with 4 treatments (3 replications) was used in this research i.e.: (A) molasses carbon source, (B) tapioca carbon source, (C) wheat carbon source, and (D) without additional carbon. The juveniles length 2.26±0.12 cm, initial average body weight 0.17±0.05 g were reared for 30 days. Twelve glass tanks (60 cm x 30 cm x 40 cm) filled with 36 L freshwater were used as the experimental culture units. The fish were fed three times daily with a commercial feed containing 27% of crude protein. External organic carbon was added daily two hours after feeding at C/N 15 estimated ratio. The observed parameters i.e.: floc profile, the nutritional content of biofloc, water quality, survival rate, final body length, daily growth rate, feed conversion ratio, protein retention, and lipid retention. The best results showed by molasses treatment, the highest fish survival rate (97.41±0.16 %), longest standard length (2.84±0.1 cm) and decreased feed conversion ratio (0.36±0.04).
Abstrak
Sistem budi daya intensif menurunkan kualitas air melalui peningkatan produk sisa metabolisme seperti nitrogen or-ganik. Penerapan teknologi bioflok adalah solusi alternatif untuk menghindari dampak buruk pembuangan nutrisi tinggi dalam sistem produksi akuakultur. Penelitian ini bertujuan untuk mengevaluasi pengaruh teknologi bioflok yang menggunakan sumber karbon berbeda pada kinerja produksi yuwana ikan patin (Pangasianodon hypophthal-mus). Rancangan penelitian yang digunakan adalah rancangan acak lengkap dengan empat perlakuan (tiga kali ulang-an) yaitu: (A) sumber karbon molase, (B) sumber karbon terigu, (C) sumber karbon tapioka, dan (D) tanpa penam-bahan karbon. Yuwana ikan patin berukuran panjang awal 2,26±0,12 cm ekor-1 dan bobot rata-rata awal 0,17±0,05 g ekor-1 dipelihara selama 30 hari. Dua belas akuarium (60 cm x 30 cm x 40 cm) diisi dengan air 36 L digunakan seba-gai unit percobaan budi daya. Ikan diberi makan tiga kali sehari dengan pakan komersial mengandung protein 27%. Penambahan karbon dilakukan setiap hari 2 jam setelah makan dengan estimasi rasio C/N 15. Parameter pengamatan meliputi: profil flok, kandungan nutrisi tepung flok, kualitas air, kelangsungan hidup, pertumbuhan panjang baku, la-ju pertumbuhan harian, rasio konversi pakan, retensi protein, dan retensi lemak. Perlakuan dengan penambahan sumber karbon molase menunjukkan kelangsungan hidup tertinggi (97,41±0,16 %), pertumbuhan panjang baku (2,84±0,1 cm), dan menurunkan rasio konversi pakan (0,36±0,04).
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