The purpose of this research was to know the influence of different shrimp farming technology on water quality (ammonia, nitrite, and nitrate) and survival rate. The method that used in this research was experimental method. Retrieval of data was obtained from three locations of vaname shrimp farming in Tuban, East Java, were in Bancar, Bancar (biofloc technology), Tasikmadu, Palang (semi biofloc technology), and Keradenan, Palang (plankton technology). The main parameters were the value of ammonia, nitrite, and nitrate, while the supporting parameters were the water quality (temperature, pH, DO, salinity, and transparency), production, and survival rate. The results showed that average of ammonia value in biofloc, semi biofloc, and plankton ponds were 0,037 – 0,044 ppm; 0,011 – 0,015 ppm; and 0,023 – 0,026 ppm, respectively. The average of nitrite value in biofloc, semi biofloc, and plankton ponds were 0,128 – 0,0135 ppm; 0,075 – 0,112 ppm; dan 0,030 – 0,039 ppm, respectively. The average of nitrate value in biofloc, semi biofloc, and plankton ponds were 1,231 – 1,414 ppm; 0,667 – 0,704 ppm; dan 0,883 – 0,980 ppm, respectively. The water quality in each pond (biofloc, semi biofloc, and plankton) in which temperature (27 – 32oC), pH (6,5 – 8,2), DO (4,65 – 7,35 ppm), salinity (1 – 39 ppt), transparency (20 – 35 cm). The production of vaname shrimp in biofloc pond was 20,78 – 26,28 ton/ha; semi biofloc was 14,83 – 20,29 ton/ha; and plankton was 7,49 – 9,25 ton/ha. The average of survival rate in biofloc, semi biofloc, and plankton ponds were 82,74%; 72,92%; dan 80,62%, respectively. From this research we could summarized that farming technology influenced on water quality (ammonia, nitrite, and nitrate), and the biofloc technology gave the best influence on water quality furthermore would influence survival rate of vaname shrimp. Keywords: vaname shrimp, water quality, survival rate, biofloc

Seagrapes (Caulerpa sp.) is one of the aquatic plants which tends to grow slowly according to the environmental conditions where sea grapes live. This study aims to determine the growth performance of sea grapes given different shelters. The method used in this study was three treatments, each treatment was repeated three times, with differences in the shade (P1 = paranet), (P2 = without roof), and (P3 = coconut leaves). Data analysis used a non-factorial completely randomized design (CRD). The results of this study are at absolute weights (P1 =1163.3 ± 260a g), (P2 = 210 ± 79.3b g), (P3 = 922 ± 199.5a g), absolute length (P1 = 5.75 ± 1.74a cm), (P2 = 0.59 ± 0 , 07b cm), (P3 = 4.82 ± 0.22a cm), daily growth rate (4.40 ± 0.1a %), (3.76 ± 0.09b %), (4.29 ± 0.09a) and the number of ramuli (P1 = 56.2 ± 21.3a), (P2 = 19.5 ± 2.3b), (P3 = 46.3 ± 3.1a). The conclusion of this study each parameter (absolute weight, absolute length and number of ramuli) has a significant difference.

Limbah cair tambak udang vaname (L. vannamei) merupakan hasil buangan dari proses budidaya yang umumnya langsung dibuang ke perairan umum. Limbah tersebut masih mengandung sejumlah unsur hara yang diperlukan untuk pertumbuhan organisme pada tingkatan trofik dibawahnya, salah satunya adalah mikroalga Chlorella sp. Namun, pada limbah tersebut masih ditemukan sejumlah organisme yang mengganggu pertumbuhan Chlorella sp. sehingga limbah harus disterilkan terlebih dahulu sebelum digunakan untuk menumbuhkan mikroalga tersebut. Tujuan dari penelitian ini adalah untuk mengetahui dosis limbah cair tambak udang vaname steril dalam produksi Chlorella sp. Penelitian ini menggunakan metode eksperimental dengan 4 perlakuan, yaitu A (dosis limbah 25%), B (dosis limbah 50%), C (dosis limbah 75%), dan D (dosis limbah 100%); masing-masing perlakuan diulang sebanyak 3 kali. Hasil penelitian menyatakan bahwa perlakuan D memberikan produksi Chlorella sp. tertinggi yang dapat dilihat dari kepadatan sel dan laju pertumbuhan spesifik pada saat puncak pertumbuhan, yaitu 2.833.333 sel/mL dan 0,472. Dari hasil penelitian ini dapat disimpulkan bahwa limbah cair tambak udang vaname steril dengan dosis 100% dapat digunakan untuk mengkultur Chlorella sp. skala laboratorium dengan menghasilkan produksi mikroalga tertinggi. Diharapkan limbah yang berasal dari hasil budidaya udang vaname dapat dimanfaatkan untuk mengkultur mikroalga sehingga mengurangi pencemaran yang terjadi di perairan umum sekitarnya. Liquid waste of vaname shrimp ponds (L. vannamei) is the result of waste from the cultivation process which is generally discharged directly into public waters. The waste still contains a number of nutrients needed for the growth of organisms at the lower trophic level, one of which is Chlorella sp. However, in these wastes there are still organisms that interfere with the growth of Chlorella sp. therefore the waste must be sterilized before using it to grow the microalgae. The purpose of this study was to determine the dose of liquid waste of sterile vaname shrimp ponds in the production of Chlorella sp. This study used an experimental method with 4 treatments, namely A (25% waste dose), B (50% waste dose), C (75% waste dose), and D (100% waste dose); each treatment was repeated 3 times. The results of the study stated that treatment D gave the production of Chlorella sp. the highest can be seen from cell density and specific growth rate at the peak of growth, which is 2,833,333 cells / mL and 0.472. The results of this study can be concluded that sterile liquid waste of vaname shrimp ponds with a dose of 100% can be used to culture Chlorella sp. laboratory scale by producing the highest microalgae production. It is expected that waste derived from vaname shrimp culture can be used to cultivate microalgae so as to reduce pollution in the surrounding public waters

Mutiara catfish (Clarias gariepenus) is a cross breeding combination of four African catfish strains that have the advantage of relatively complete cultivation performance, one of which has a high growth rate compared to other strains. This study aims to examine the growth of Mutiara catfish seeds so that they can support the availability and sustainability of this super seed. This research is descriptive study with survey method. This research begins with the preparation of the equipments and maintenance media, the maintenance of the broodstock, the spawning process, the egg hatching process, larval rearing and nursery, growth monitoring, and harvesting. Data were analyzed descriptively including weight, length, ADG, and biomass data at the ages of 14, 21, and 28 days. Based on the results of the study, it was seen that there was an increase in weight and length of Mutiara catfish seeds, namely 0.9 grams; 1.6 grams; and 2.8 grams for the weight of seeds, while 0.82 cm; 2.40 cm; and 3.90 cm for the length of the seeds, on the 14th, 21st, and 28th days respectively. Based on these data, it can be seen that the seed growth rate has also increased, namely 0.005 grams; 0.100 grams; and 0.170 grams so that the biomass also increased to 94.27 kg; 167.60 kg; and 277.86 kg. Based on the results of this study, it can be seen that Mutiara catfish seeds have good growth, seen from the ADG and Biomass values which have increased during monitoring. This good growth increase is due to good feeding and good water quality control.

ABSTRAK   Anggur laut (Caulerpa sp.) merupakan salah satu jenis rumput laut yang memiliki nilai ekonomis tinggi yaitu dapat dimanfaatkan sebagai bahan makanan, pangan fungsional, dan obat.Sebagian kecil masyarakat wilayah Nusa Tenggara Timur telah mengenal anggur laut, namun pemanfaatannya masih sangat terbatas sebagai bahan makanan segar saja atau disebut dengan lawar. Anggur laut tersebut diperoleh dari alam sehingga ketersediaannya sangat tergantung dari alam dan kondisi musim. Budidaya merupakan cara yang dapat dilakukan untuk memastikan ketersediaan dan jumlah anggur laut sehingga dapat dimanfaatkan oleh masyarakat secara berkelanjutan. Tujuan kegiatan ini adalah memberikan sosialisasi tentang budidaya serta potensi anggur laut, dan memberikan pelatihan tentang budidaya anggur laut bagi masyarakat Desa Bolok.Kegiatan pengabdian kepada masyarakat ini bermitra dengan Kelompok Tani Rumput Laut “UT LATU” yang beralamat di Dusun III, Desa Bolok, Kupang Barat, NTT.Metode pelaksanaan kegiatan dilakukan dua tahap. Tahap pertama adalah sosialisasi tentang budidaya anggur laut, manfaat anggur laut, produk olahan anggur laut dan tahap kedua adalah pelatihandengan tahapan persiapan alat dan bahan, penimbangan bibit anggur laut, penanaman dalam media tanam berupa PE, penambahan pupuk Guano, pemasukan media tanam ke dalam kontainer box, monitoring pertumbuhan, panen, dan pengawetan sederhana anggur laut.Pada saat panen diperoleh bobot anggur laut berkisar antara 680 – 1210 g dari bobot awal 400 g selama pemeliharaan 30 hari, pertumbuhan relatif diperoleh nilai 70 – 203%. Setelah kegiatan ini dilaksanakan, masyarakat mulai menyadari akanmanfaat anggur laut, dan dapat ditumbuhkan pada kontainer box yang diletakkan di pekarangan rumah sehingga dapat menjadi alternatif kegiatan budidaya oleh masyarakat.