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Jurnal Riset Akuakultur
Published by Politeknik Kelautan dan Perikanan Jembrana
ISSN : 19076754     EISSN : 25026534     DOI : http://doi.org/10.15578/JRA
Core Subject : Agriculture, Social,
Agriculture, Biological Sciences & Forestry Environmental Science
Jurnal Riset Akuakultur as source of information in the form of the results of research and scientific review (review) in the field of various aquaculture disciplines include genetics and reproduction, biotechnology, nutrition and feed, fish health and the environment, and land resources in aquaculture
Arjuna Subject : Umum - Umum
Articles 7 Documents
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Search results for , issue "Vol 14, No 3 (2019): (September, 2019)" : 7 Documents clear
APLIKASI SISTEM RESIRKULASI PADA PENDEDERAN IKAN KAKAP PUTIH, Lates calcarifer KEPADATAN TINGGI Gusti Ngurah Permana; Zeny Pujiastuti; Fakhrudin Fakhrudin; Ahmad Muzaki; Ketut Mahardika; Kukuh Adiyana
Jurnal Riset Akuakultur Vol 14, No 3 (2019): (September, 2019)
Publisher : Pusat Riset Perikanan, Badan Riset dan Sumber Daya Manusia Kelautan dan Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (126.738 KB) | DOI: 10.15578/jra.14.3.2019.173-182

Abstract

 Teknologi resirkulasi (Recirculating aquaculture system [RAS]) dikembangkan untuk meningkatkan produktivitas benih ikan kakap putih. Tujuan dari penelitian ini untuk mengetahui pengaruh perbedaan kepadatan pada pendederan benih ikan kakap dengan sistem RAS. Penelitian ini menggunakan sistem RAS dengan 12 bak dengan volume 1,0 m3 yang terbagi dalam dua modul dengan masing-masing modul terdiri atas enam bak. Untuk perbandingan digunakan sistem sirkulasi yang mengadopsi teknologi yang ada di masyarakat menggunakan tiga bak beton dengan volume 1 m3. Benih ikan kakap putih yang dipergunakan memiliki panjang rata-rata: 2,87 cm ± 0,18 cm dan bobot rata-rata: 0,39 ± 0,07 g. Perlakuan menggunakan perbedaan kepadatan yaitu (A) 3.000 ekor/m3 (1,17 kg/m3); (B) 4.500 ekor/m3 (1,75 kg/m3); dan (C) sirkulasi 1.500 ekor/m3 (0,62 kg/m3). Parameter yang diamati meliputi: pertumbuhan, sintasan, kualitas air, dan pada akhir penelitian, sampel darah diambil untuk menentukan kesehatan ikan yang berhubungan dengan parameter haematokrit darah. Analisis data secara deskriptif dan uji t test. Hasil penelitian menunjukkan bahwa perbedaan padat penebaran pada sistem RAS dan sirkulasi secara signifikan tidak menunjukkan perbedaan (P>0,05) pertumbuhan panjang dan bobot benih. Sintasan tertinggi diperoleh pada kelompok ikan kontrol, diikuti dengan kelompok ikan dengan kepadatan 3.000 ekor/m3 dan terendah pada kelompok ikan dengan kepadatan 4.,500/m3 ekor. Nilai hematokrit dalam darah lebih tinggi (P<0,05) ditunjukkan dari kelompok ikan dengan kepadatan yang lebih rendah. Hasil tersebut menunjukkan bahwa aplikasi sistem resirkulasi pada pendederan ikan kakap putih dapat dilakukan dengan penerapan kepadatan 3.000 ekor/m3 (31,04 kg/m3).Recirculating aquaculture system (RAS) has been developed to increase the productivity of barramundi nursery. This study used 12 tanks with a volume of 1.0 m3 each. The tanks were grouped into two modules, each module consisted of six tanks. As a comparison, a circulation system adopted by the local community was used which consisted of three concrete tanks with a volume of 1 m3. Barramundi juveniles with an average length: 2.87 cm ± 0.18 cm and an average weight of 0.39 ± 0.07 g) were used in the experiment. The treatments were differences in stocking densities: 3,000 fish/m3 (1.17 kg/m3); 4,500 fish/m3 (1.75 kg/m3); and control 1,500 fish/m3 (0.62 kg/m3). Data collected included growth of survival and water quality variables (temperature, salinity, DO, pH, nitrite, NH3, total bacteria/vibrio) and blood hematocrit. The results of this study showed that fish densities (4,500; 3,000; and 1,500 fish/m3) did not affect fish growth. However, the survival rate was significantly different (P<0.05) among the treatments. The values of hematocrit were significantly (P<0.05) higher at the density of 46.56 kg/m3. These results suggest that the RAS application can sustain a nursery density of Barramundi up to 3,000 ind./m3 (31.04 kg/m3).
AKTIVITAS DAN KARAKTERISASI ENZIM PROTEASE ISOLAT Bacillus sp. (UJ132) SECARA KUALITATIF DAN KUANTITATIF Sumardi Sumardi; Salman Farisi; Chiristina Nugroho Ekowati; Milsa Solva Diana
Jurnal Riset Akuakultur Vol 14, No 3 (2019): (September, 2019)
Publisher : Pusat Riset Perikanan, Badan Riset dan Sumber Daya Manusia Kelautan dan Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (679.012 KB) | DOI: 10.15578/jra.14.3.2019.193-199

Abstract

Bakteri penghasil enzim protease memiliki kemampuan untuk melakukan bioremediasi limbah protein. Penelitian ini dilakukan untuk mengetahui aktivitas dan karakterisasi enzim protease dari isolat Bacillus sp. (UJ132) yang diisolasi dari udang pasir (Metapenaeus affinis) di kawasan hutan mangrove Desa Margasari, Lampung Timur. Uji aktivitas enzim dilakukan secara kualitatif dan kuantitatif. Karakterisasi enzim meliputi penentuan suhu dan pH optimum, pengaruh ion logam, serta penentuan Km dan Vmaks. Dari hasil percobaan diketahui bahwa enzim protease dihasilkan pada waktu produksi optimum 18 jam dengan aktivitas protease sebesar 0,09 U/mL. Suhu optimum enzim ini yaitu pada suhu 50°C yang menghasilkan aktivitas sebesar 0,08 U/mL. Enzim protease ini mempunyai kondisi optimum pada pH 5 dengan nilai aktivitas 0,09 U/mL. Semua ion logam (Ca2+, Mn2+, Cu2+, Mg2+) berfungsi sebagai inhibitor kecuali ion Fe3+ yang berfungsi sebagai aktivator pada konsentrasi 1 mM dan 5 mM. EDTA dengan konsentrasi 1 mM dan 5 mM berfungsi sebagai inhibitor pada enzim protease isolat UJ132. Nilai Vmaks enzim protease 0,33 U/mL sedangkan Km senilai 4,59 mg/mL substrat, enzim ini mempunyai afinitas yang tinggi terhadap substrat.Shrimp farming produces protein wastes which mainly come from the remnants of given feed and excreta (feces) of shrimp. Bacteria known to possess protease enzymes have the ability to solve this protein waste problem in the shrimp farming industry. This study was conducted to determine the production and characterization of protease enzyme from Bacillus sp. (UJ132) isolated from the mangrove forest area of Margasari Village of Lampung Timur. The enzyme activity test was done qualitatively and quantitatively. The objectives of this study were to determine the optimum production of the enzymes and observe their characteristics, including determining the temperature and optimum pH, the effect of several metal ions, as well as Km and Vmax. The experimental results revealed that the protease enzyme had an optimum time of 18 hours of protease activity as much as 0.09 U/mL. The optimum temperature of this enzyme was 50°C which produced an activity of 0.08 U/mL. This protease enzyme has an optimum working condition at pH 5 with an activity value of 0.09 U/mL. All metal ions (Ca2+, Mn2+, Cu2+, Mg2+) acted as inhibitors except Fe3 + ions which acted as activators at concentrations of 1 mM and 5 mM. EDTA with a concentration of 1 mM and 5 mM served as an inhibitor of UJ132 isolate protease enzyme. The value of Vmax of the protease enzyme was 0.33 U/mL while Km was 4.59 mg/mL suggesting that this enzyme has a high affinity with the substrate.
ANALISIS MAKANAN ALAMI DALAM LAMBUNG DAN MIKROHABITAT LOBSTER PASIR (Panulirus homarus) FASE PUERULUS DI TELUK AWANG Muhsinul Ihsan; Suhirman suhirman; Edi M Jayadi; Reza Sagista; Yuli Eka Hardianti; Wahyu Bintang Ilahi; Handa Muliasari; Lalu Achmad Tantilar Wangsajati Sukmaring Kalih
Jurnal Riset Akuakultur Vol 14, No 3 (2019): (September, 2019)
Publisher : Pusat Riset Perikanan, Badan Riset dan Sumber Daya Manusia Kelautan dan Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (126.738 KB) | DOI: 10.15578/jra.14.3.2019.183-191

Abstract

Pulau Lombok memiliki potensi dalam industrialisasi lobster. Aspek makanan alami larva perlu dipahami untuk mendukung pembenihan lobster. Tujuan penelitian ini untuk menganalisis makanan alami dalam lambung dan mikrohabitat lobster pasir (Panulirus homarus) fase Puerulus. Cairan lambung dari sepuluh ekor Puerulus dianalisis dengan metode analisis plankton. Makanan alami di mikrohabitat dikoleksi dengan menyaring seratus liter air laut dari alat tangkap dengan jaring plankton. Makanan alami dalam lambung meliputi fitoplankton dan zooplankton. Fitoplankton terdiri atas satu kelas yaitu bacillariophyceae, tiga ordo yaitu rhabdonematales; naviculales; fragilariales; dan tiga spesies yaitu: Grammatophora marina, Navicula cancellata, dan Synedra radians. Zooplankton terdiri atas kelas oligothriceae ordo choreotrichi spesies Tintinnopsis lobiancoi. Makanan alami di mikrohabitat juga terdiri atas fitoplankton dan zooplankton. Struktur komunitas fitoplankton terdiri atas enam kelas; 26 ordo; dan 39 spesies, sedangkan komunitas zooplankton terdiri atas 10 kelas; 10 ordo; dan 20 spesies. Indeks keanekaragaman makanan alami dalam lambung sebesar 1,39. Rata-rata nilai kelimpahan, indeks keanekaragaman, keseragaman, dan dominansi fitoplankton, serta zooplankton di mikrohabitat berturut-turut 65.744 sel/50 mL; 3,03; 0,82; 0,08; serta 182 sel/50 mL; 1,89; 0,62; 0,3. Grammatophora marina, Navicula cancellata, Synedra radians, dan Tintinnopsis lobiancoi berpotensi sebagai pakan alami larva lobster pasir  (Panulirus homarus).Lombok Island has a high potential to be developed as a central area for lobster farming industry due to the abundance of puerulus in the area. One of the requirements to support the industry is by providing the biological aspect information of spiny lobster (Panulirus homarus) especially its local natural diet during the puerulus phase, which is required to develop a sustainable operation of lobster hatchery. This research was aimed to determine the natural diet in the stomach and microhabitat of puerulus of spiny lobster. The natural diet in the stomach fluid of ten Puerulus was determined using plankton analysis method, while the natural diet in the lobster microhabitat was collected by filtering one hundred liters of seawater in the catching media by using plankton nets. The natural diet in the stomach of puelurus includes phytoplankton and zooplankton. Phytoplankton consisted of one class, bacillariophyceae; three ordines, rhabdonematales, naviculales, fragilariales; and three species, Grammatophora marina, Navicula cancellata, and Synedra radians. Zooplankton consisted of class oligothriceae, ordo choreotrichi, species Tintinnopsis lobiancoi. The natural diet in the microhabitat also consisted of phytoplankton and zooplankton. The community structure of phytoplankton consisted of six classes; 26 ordines; and 39 species, while zooplankton consisted of 10 classes; 10 ordines; and 20 species. The diversity index of the natural diet in the puerulus stomach was classified as moderate H’ 1.39. The averages of abundance, diversity, similarity, and dominance index of phytoplankton and zooplankton in the microhabitat were 65,744 cell/50 mL; 3.03; 0.82; 0.08; and 182 cell/50 mL; 1.89; 0.62; 0.3 respectively. Grammatophora marina, Navicula cancellata, Synedra radians, and Tintinnopsis lobiancoi were found to be dominant and have the potential to be developed as the natural hatchery diet for spiny lobster larvae.
PERFORMA PERTUMBUHAN DAN PRODUKTIVITAS IKAN MAS STRAIN MUSTIKA PADA UJI MULTI LOKASI Didik Ariyanto; Yogi Himawan; Khairul Syahputra; Flandrianto Sih Palimirmo; Suharyanto Suharyanto
Jurnal Riset Akuakultur Vol 14, No 3 (2019): (September, 2019)
Publisher : Pusat Riset Perikanan, Badan Riset dan Sumber Daya Manusia Kelautan dan Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (330.637 KB) | DOI: 10.15578/jra.14.3.2019.139-144

Abstract

Ikan mas Mustika merupakan varietas unggul ikan mas hasil seleksi tahan penyakit Koi Herpes Virus (KHV). Secara laboratoris, uji tantang ikan mas Mustika dengan KHV menghasilkan sintasan lebih dari 90%. Namun demikian, performa ikan mas Mustika di lingkungan budidaya terkait pertumbuhan dan tingkat produktivitasnya belum banyak dikaji. Penelitian ini bertujuan mengevaluasi performa ikan mas Mustika sebagai varietas unggul tahan KHV di beberapa lokasi sentra budidaya. Penelitian dilakukan di kolam air deras (KAD) di Tanjungsiang, Subang; serta karamba jaring apung (KJA) di Waduk Jatiluhur, Purwakarta; Waduk Cirata, Cianjur; dan Waduk Darma, Kuningan. Sebagai pembanding digunakan ikan mas Majalaya yang berasal dari unit pembenihan rakyat (UPR) setempat. Penelitian dilakukan dengan tiga kali ulangan selama 90 hari. Hasil penelitian menunjukkan bahwa performa ikan mas lebih dipengaruhi oleh faktor lingkungan daripada faktor genetik, serta interaksi kedua faktor tersebut. Hasil penelitian juga menunjukkan bahwa kualitas perairan di Waduk Darma lebih rendah dibanding lokasi lainnya. Di lokasi tersebut, ikan mas Mustika mempunyai pertumbuhan, produktivitas, dan rasio konversi pakan sebesar 2,81%/hari; 13,42 kg/m2; dan 1,43 secara nyata lebih baik daripada varietas pembanding, sebesar 2,21%/hari; 8,16 kg/m2; dan 2,54. Di lokasi lainnya, performa ikan mas Mustika tidak berbeda nyata dengan varietas pembanding. Hal ini mengindikasikan bahwa ikan mas Mustika mempunyai toleransi yang lebih baik terhadap kondisi lingkungan perairan yang buruk, daripada varietas pembanding.Mustika is the newly produced superior variety of common carp strains resistant to Koi Herpes Virus (KHV). The challenge test of Mustika common carp against KHV resulted in a survival rate of more than 90%. However, the information on the growth and productivity of Mustika common carp in culture conditions is not yet available to supplement its superior resistance to KHV. This study was aimed to evaluate the performance of Mustika as a superior variety of common carp resistant to KHV resistance through multi-location tests which were in: running water ponds (KAD) in Tanjungsiang, Subang; floating net cages (KJA) in Jatiluhur Reservoir, Purwakarta; Cirata Reservoir, Cianjur; and Darma Reservoir, Kuningan. In all trial locations, Majalaya carp from the local hatchery (UPR) were used as the comparison population. The study was conducted for 90 days with three replications. The result showed that the performance of the carp was more affected by the environmental factor than both genetic and interaction of genetic >< environment factors. In Darma reservoir which has poorer water quality conditions, Mustika common carp had better growth, productivity and food conversion ratio of 2.81%/day, 13.42 kg/m2, and 1.43, respectively, compared to that of the comparison population of 2.21%/day, 8.16 kg/m2, and 2.54. Among the locations used in the multi-location test, the performances of Mustika common carp and the comparison population were not significantly different. These results indicate that Mustika common carp is more tolerant of being cultured in poorer water quality conditions
PEREMAJAAN BIBIT RUMPUT LAUT Gracilaria verrucosa HASIL KULTUR JARINGAN MELALUI SELEKSI MASSA Sri Redjeki Hesti Mulyaningrum; Andi Indra Jaya Asaad; Hidayat Suryanto Suwoyo; Erfan Andi Hendrajat
Jurnal Riset Akuakultur Vol 14, No 3 (2019): (September, 2019)
Publisher : Pusat Riset Perikanan, Badan Riset dan Sumber Daya Manusia Kelautan dan Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (126.738 KB) | DOI: 10.15578/jra.14.3.2019.153-162

Abstract

Penelitian ini bertujuan untuk menguji performa bibit rumput laut Gracilaria verrucosa hasil kultur jaringan yang diremajakan dengan metode seleksi massa. Penelitian dilaksanakan di tambak percobaan Marana, Maros, Sulawesi Selatan; menggunakan dua petakan tambak berukuran sekitar 2.500 m2. Seleksi dilakukan berdasarkan perhitungan laju pertumbuhan harian (LPH), menggunakan sistem long line selama dua siklus dengan durasi 30 hari/siklus. Bibit rumput laut hasil seleksi kemudian dipelihara dengan sistem tebar dasar dan dibandingkan dengan kontrol internal dan kontrol eksternal dengan memasang sembilan unit hapa berukuran 1 m x 1 m x 1 m, dengan tiga ulangan untuk masing-masing perlakuan. Perhitungan LPH, kandungan agar, dan kekuatan gel dilakukan setiap 30 hari dan setiap 15 hari dilakukan monitoring terhadap kualitas air yakni salinitas, suhu, nitrat, dan fosfat. Hasil yang diperoleh memperlihatkan adanya peningkatan LPH yang signifikan (P<0,05) dari siklus-I (2,67 ± 0,38%/hari) menjadi (3,56 ± 0,25%/hari) pada siklus-II, dengan respons seleksi sebesar 21,48%-22,34% dan diferensial seleksi sebesar 9,70%-10,16%. Pertumbuhan rumput laut hasil seleksi lebih tinggi (3,23 ± 0,50%/hari) dibandingkan dengan kontrol internal (2,12 ± 0,02%/hari), dan kontrol eksternal (1,69 ± 0,09%/hari) (P<0,05). Kontrol internal memiliki kandungan agar yang lebih tinggi (20,07 ± 12,97%) dari rumput laut hasil seleksi (16,07 ± 1,58%) dan kontrol eksternal (8,29 ± 1,69%) (P<0,05); namun hasil seleksi memiliki kekuatan gel yang lebih tinggi (761,15 ± 208,90 g/cm2) dari kontrol internal (322,44 ± 244,29 g/cm2), dan kontrol eksternal (297,42 ± 44,16 g/cm²) (P<0,05). Peremajaan bibit rumput laut hasil kultur jaringan dengan metode seleksi massa mampu meningkatkan performa bibit rumput laut G. verrucosa.This study was aimed to determine the performance of tissue-cultured seaweed seed Gracilaria verrucosa, which was propagated using mass selection method. The study was conducted in the experimental ponds in Marana, Maros,  South Sulawesi. The mass selection was conducted in two ponds of 2,500 m2. The selection was made by culturing the seaweed seed using the long line system for two cycles in 30 days/cycle duration during which the daily growth rates (DGR) of seaweed seeds were measured. The selected seaweed seeds were then cultivated in the ponds using broadcast system and the growth was compared with the internal and external controls consisted of nine units of 1 m x 1 m x 1 m hapa, with three replications for each treatment (selected seed, internal control, and external control). The measurements of DGR, agar yield, and gel strength were conducted every 30 days, while water quality monitoring i.e. salinity, temperature, nitrate, and phosphate were conducted every 15 days. The results showed that the DGR of seaweed seed increased significantly (P<0.05) from 2.67 ± 0.38%/day in cycle-I to 3.56 ± 0.25%/day in cycle-II, the selection response was 21.48%-22.34% and the differential selection was 9.70%-10.16%. The daily growth rate of selected seaweed seed was significantly higher (3.23 ± 0.50%/day) (P<0.05) compared to internal (2.12 ± 0.02%/day) and external controls (1.69 ± 0.09%/day). Internal control has higher agar yield (20.07 ± 12.97%) compared to the selected seed (16.07 ± 1.58%) and external control (8.29 ± 1.69%) (P<0,05). The selected seed has higher gel strength (761.15 ± 208.90 g/cm2) compared to internal control (322.44 ± 244.29 g/cm2), and external control (297.42 ± 44.16 g/cm2) (P<0,05). Propagated tissue-cultured seaweed seed using the  mass selection method could improve the overall performance of seaweed seed. 
PERFORMA BIBIT RUMPUT LAUT Gracilaria verrucosa HASIL KULTUR JARINGAN DENGAN BUDIDAYA METODE SEBAR (BROADCAST) DI TAMBAK KABUPATEN SINJAI Rosmiati Rosmiati; Harlina Harlina; Emma Suryati; Rohama Daud; Herlinah Herlinah
Jurnal Riset Akuakultur Vol 14, No 3 (2019): (September, 2019)
Publisher : Pusat Riset Perikanan, Badan Riset dan Sumber Daya Manusia Kelautan dan Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (301.265 KB) | DOI: 10.15578/jra.14.3.2019.145-152

Abstract

Rumput laut Gracilaria verrucosa asal Kabupaten Sinjai memiliki kualitas paling rendah di antara semua sentra produksi Gracilaria sp. di Sulawesi Selatan. Hal ini salah satunya dikarenakan oleh bibit yang buruk. Penyediaan benih rumput laut yang berkualitas dapat dilakukan salah satunya dengan penggunaan bibit hasil kultur jaringan. Perbanyakan bibit Gracilaria verucosa dapat dilakukan dengan menggunakan metode tali panjang long line maupun metode sebar (broadcast) di tambak. Tujuan penelitian ini untuk mengetahui respons pertumbuhan, kandungan agar, dan kekuatan gel (gel strength) dari bibit G. verucosa hasil kultur jaringan di tambak Kabupaten Sinjai. Metode penelitian ini adalah eksperimen dengan dua perlakuan dan tiga ulangan yaitu perlakuan A (bibit kultur jaringan) dan B (bibit lokal) dengan berat awal masing-masing 10 kg. Pemeliharaan bibit dengan metode sebar dilakukan selama 30 hari. Hasil analisis ragam menunjukkan bahwa laju pertumbuhan harian (DGR), kandungan agar dan gel strength bibit kultur jaringan dan bibit lokal menunjukkan perbedaan yang nyata (P<0,05). Secara kuantitas hasil produksi bibit hasil kultur jaringan memiliki pertumbuhan yang lebih tinggi daripada bibit lokal dengan berat akhir bibit 44,3 ± 4,16 kg hasil kultur jaringan dan 33,0 ± 4,35 kg lokal dengan DGR 4,97% bobot/hari (kultur jaringan) dan 3,90% bobot/hari (lokal). Secara kualitas bibit hasil kultur jaringan lebih baik dari bibit lokal, ditunjukkan dengan persentase kandungan agar bibit hasil kultur jaringan lebih tinggi daripada bibit lokal dengan rendemen agar 22,19 ± 2,45% (kultur jaringan) dan 16,50 ± 0,96% (lokal), sementara gel strength sebesar 204,20 ± 0,45 g/cm2 (hasil kultur jaringan) dan 128,10 ± 1,55 g/cm2 (bibit lokal).Seaweed Gracilaria verrucosa from Sinjai Regency has the lowest quality among all Gracilaria sp. Production centers in South Sulawesi due to the low quality of the seed. The seed quality can be improved using seed selection, followed by tissue-culture methods. Long-line and broadcast methods in brackishwater ponds are the efficient seaweed culture techniques to multiply the number of Gracilaria verrucosa seeds. This research was aimed to determine growth performance, gel content, and gel strength of seeds produced from tissue-culture and local seaweed farming. The experiment consisted of two treatments: treatment A (cells culture seed) and B (local seed) with the initial weight of 10 kg, each has three replicates. Both seeds were stocked and reared in the ponds using the broadcast method for 30 days. The results of DGR, gel content and gel strength showed a significant difference between tissue-cultured and local seeds (P<0.05). The tissue-cultured seed had better growth than the local seed with 4.97% mass/day for tissue-cultured seed and 3.90 mass/day for local seed. The tissue-culture seed also had better quality in agar content and gel strength. The agar content of tissue-cultured was 22.19 ± 2.45% and the local was 16.50 ± 0.96%. The gel strength of tissue-culture was 204.20 ± 0.45 g/cm2, and the local was 128.10 ± 1.55 g/cm2.
EFEKTIVITAS SALINITAS AIR DALAM MENINGKATKAN SINTASAN BELUT MONOPTERUS ALBUS DAN PENGARUHNYA TERHADAP PROFITABILITAS PENJUALAN BELUT HIDUP Iis Diatin; Yani Hadiroseyani; Danfi Astuti
Jurnal Riset Akuakultur Vol 14, No 3 (2019): (September, 2019)
Publisher : Pusat Riset Perikanan, Badan Riset dan Sumber Daya Manusia Kelautan dan Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (126.738 KB) | DOI: 10.15578/jra.14.3.2019.163-171

Abstract

Belut (Monopterus albus) merupakan ikan air tawar konsumsi hasil tangkapan dari perairan umum yang dijual dalam keadaan hidup dengan harga tinggi dan permintaan yang terus meningkat. Aktivitas penangkapan, transportasi, dan penampungan menimbulkan kematian yang cukup banyak sehingga mengurangi stok dan nilai penerimaan penjualan belut. Penanganan belut pasca-penangkapan dalam air salin dapat menekan tingkat kematian belut, namun dampaknya terhadap keuntungan bisnis belum diketahui. Penelitian ini bertujuan untuk mengevaluasi penampungan dalam air salin terhadap sintasan dan keuntungan usaha penjualan belut hidup. Penelitian dilakukan pada pedagang besar belut hidup di Jawa Tengah yang memperoleh pasokan belut dari berbagai lokasi di Jawa. Belut uji yang diperoleh dari tiga lokasi yaitu Ciamis, Jawa Barat; Cilacap, Jawa Tengah; dan Lumajang, Jawa Timur; masing-masing ditampung terpisah dan dipelihara selama enam hari dalam air tawar (salinitas 0 g/L) dan air tawar yang ditambah garam krosok pada konsentrasi 6 g/L. Hasil menunjukkan bahwa penampungan selama seminggu dalam salinitas 6 g/L menghasilkan tingkat sintasan belut 1,6 kali dibandingkan dengan penampungan dalam air tawar pada semua lokasi asal belut. Sintasan yang lebih tinggi tersebut meningkatkan nilai penerimaan dan keuntungan usaha.Asian swamp eel (Monopterus albus) is a highly-priced freshwater fish collected from natural waters and sold alive in the market with an ever-increasing demand. Fishing methods, transportation, and holding of live eels before being sold frequently result in significant mortality, which eventually reduces the sales revenue from the business. However, post-capture handling of the eel using saline water could reduce the mortality rate, but the impact on business profits has never been determined. This study was aimed to determine the effects of water salinity on the survival of the eels during the holding period and calculate the profit gain from live eel sales. The research was carried out in the facility of a wholesaler of live Asian swamp eel in Central Java which received eel supply from various locations in Java. The samples of eels were originated from three locations, namely Ciamis, West Java; Cilacap, Central Java; and Lumajang, East Java. The eels were placed in separate containers filled with: fresh water (salinity 0 g/L) and freshwater added with salt at concentration 6 g/L for six days. The results showed that six days holding period in salinity of 6 g/L resulted in a higher survival rate of the eels up to 1.6 times compared to the freshwater. This higher survival has increased the revenues and profitability of the live eels sales.

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