Biofloc technology (BFT) is one of the most developed aquaculture technologies, which aims to improve the efficiency of feed use by providing nutrients for flocs to be used by fish as a supplementary feed. Also, BFT serves to improve water quality through the breaking down of fish waste materials assisted by heterotrophic bacteria. Bacteria used in this study were Bacillus sp. as probiotics in BFT. This study aimed to examine the production performance of catfish maintained with a biofloc system on an industrial scale, without experimental design. The average weight of catfish when stocking was 5.9 ± 0.0 g/fish with a density of 7000 fish in 9 unit circular ponds. This studies showed after 78 days of culture, bodyweight gain about 28.6 g/fish to 41.7 g/fish, highest specific growth rate was K2 (2.4 ± 0.2% BW/day), the highest survival rate K2 (98.87 ± 6.64% BW/day), highest grow rate K1 (41.7 ± 5.8 g) and the best FCR K9 (0.95 ± 0.11).
<p><em>Cannibalism can cause high mortality in a lobster culture. To prevent cannibalism, an artificial shel-ter is needed like the individual compartments system (ICS) to</em><em> ensure that there is no contact bet-ween lobsters.</em><em> This study aimed to evaluate the application of ICS on total hemocytes glucose hemo-lymph, production performance, and determine the shape of more effective ICS to minimize stress level of lobster. The treatments used for various application shape of ICS was tubular ICS, triangle ICS, square ICS, and shelter PVC pipes as control. Lobster maintenance was conducted in outdoor for 60 days. The results indicated that physiological responses with square ICS treatment were more effective to reduce stress level compared with other treatments (p<0.05). Application of ICS was more optimal to improved SR (p<0.05) and growth of lobster (p>0.05). Overall, treatment of square ICS was opti-mal related to production performance i.e. SR 88.89±5.24%, SGR 0.61±0.49%/day, with harvest size of total length 137.31±8.11 mm/ind, weight 58.83±4.78 g/ind, and FCR 22.71±1.72. Application of ICS in lobster culture was effective to reduce stress level as indicated from total hemocytes and gluco-se hemolymph, and support optimal production performance. Lobster culture using a square ICS sha-pe was effective to minimize stress level, compared with tubular ICS and triangle ICS.</em></p><p><strong><em></em></strong><strong><em>Keywords:</em></strong><em> cannibalism, glucose, hemocytes, individual compartments system, lobster, production</em></p>
Teknologi bioflok dapat memperbaiki kualitas air pada sistem budidaya ikan lele intensif dan bioflok juga dapat dimanfaatkan sebagai pakan tambahan bagi ikan. Namun adanya kebutuhan oksigen bakteri heterotrof yang sangat banyak pada teknologi bioflok mengakibatkan kandungan oksigen terlarut pada media pemeliharaan relatif rendah sehingga dapat menghambat pertumbuhan ikan. Penelitian ini bertujuan untuk mengevaluasi penggunaan pipa mikro-pori sebagai diffuser aerasi pada budidaya ikan lele intensif berbasis teknologi bioflok. Penelitian ini menggunakan rancangan acak lengkap (RAL) dengan 4 perlakuan dan 3 ulangan. Perlakuan yang diterapkan adalah bentuk atau model difuser pipa mikro-pori berbentuk linear pada sistem bioflok (BFT L), diffuser bentuk sirkular (BFT S), diffuser paralel (BFT P), serta batu aerasi sebagai kontrol (BFT K). Hasil penelitian menunjukkan pipa mikro-pori menghasilkan oksigen terlarut yang lebih tinggi pada kisaran 3-5,7 mg L-1 dibanding kontrol (batu aerasi). Tingkat kelangsungan hidup ikan tertinggi terdapat pada perlakuan BFT L sebesar 78,67% P <0.05) . Laju pertumbuhan harian tertinggi terdapat pada perlakuan BFT L dan BFT S yaitu sebesar 6,80 % hari-1 dan 6,68 % hari-1 (P <0.05). Penggunaan pipa mikro-pori sebagai diffuser aerasi juga dapat meningkatkan rasio konversi pakan dan retensi protein lebih tinggi dibanding menggunakan batu aerasi (P <0.05).Kata Kunci : Bioflok, Ikan Lele, Intensif, Pipa Mikro-pori, Oksigen Terlarut, Kinerja Produksi
The utilization of plastic waste can lead to innovation the support of economy and creativity peoples. The upcycling of plastic cup waste into handicraft supplies is one of the solutions to minimalize plastic cup waste around the coast. The making of Rula Basket is aimed to change the people's mindset on how to make use of waste plastic cups into an alternative to seaweed basket that is made of rattan, as well as to create a positive activity for women's empowerment in the coastal area. The research methods used Descriptive analysis. Developing Rula Basket is expected to be one of the women empowerment ventures to increase the economy by recycling plastic cup waste into appropriate products with economic value. This measure was also carried out to preserve the aquatic ecosystem in Tablolong Beach, Tablolong Village, West Kupang, East Nusa Tenggara.
Vannamei shrimp (Litopenaeus vannamei) is one of the leading fishery commodities that have high economic value. If the process is implemented properly, shrimp production with a super intensive system becomes a profitable future of the aquaculture orientation. This study aims to examine the production process and product performance of super- intensive system vannamei shrimp on an industrial scale. This research method is a case study that includes observation, interviews, and directly follows the production process of shrimp on an industrial scale, without experimental design. The production process includes ponds preparation, media preparation, seed selection and stocking, management of feed and water quality, monitoring of pests and disease, monitoring of growth, and harvest. The treatment given was the application of Bacillus sp. as probiotics on rearing media to optimize shrimp growth. This study showed after 100 days of rearing resulted in SR 71%; biomass 8.96 tons; harvest size 45 – 32; ABW 22 g/tail; ADG 0.4 g/day; and FCR 1.6. Water quality was still in the optimal ranges to support of shrimp growth, includes: temperatures 27 – 31oC; brightness 14 – 120 cm; pH 7.4 – 8.6; salinity 33 – 34 mg/L; dissolved oxygen 3.8 – 5.5 mg/L; alkalinity 100 – 360 mg/L; TOM 40 – 103 mg/L; and nitrite 0.05 – 27.5 mg/L. The production process of vannamei shrimp on an industrial scale with a super intensive system that is applied by PT. Sumbawa Sukses Lestari Aquaculture, West Nusa Tenggara shows optimal growth and yields.
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