scholarly journals The concentration of optimum dissolved oxygen levels for growth of mangrove crab Scylla serrata seed in recirculation system

2017 ◽  
Vol 16 (1) ◽  
pp. 107 ◽  
Author(s):  
Kurnia Faturrohman ◽  
Kukuh Nirmala ◽  
Daniel Djokosetiyanto ◽  
Yuni Puji Hastuti
Keyword(s):  
Dissolved Oxygen ◽  
Stress Responses ◽  
Production Performance ◽  
Scylla Serrata ◽  
Total Biomass ◽  
Mangrove Crab ◽  
Randomized Design ◽  
Absolute Growth ◽  
Mangrove Crabs

<p class="NoParagraphStyle"><strong>ABSTRACT</strong></p><p class="NoParagraphStyle"><strong> </strong></p><p class="NoParagraphStyle">This study aimed to determine optimum dissolved oxygen (DO) through the addition of aeration and to evaluate the role of dissolved oxygen on production performance and stress responses of mangrove crab <em>Scylla serrata</em>. Experimental design used was complete randomized design with four treatments namely no aeration (A), one point aeration (B), two points aeration (C), and three points aeration (D). All treatments replicated three times. The crab with the average of body weight 45.6±2.1 g/individual cultured in a plastic box (40×30×30 cm<sup>3</sup>). The stocking densities was 10 crab/box. Crab was cultured within 42 days and were fed two times a day by restricted method (15% of the total biomass). The result showed that C treatment produced 5.51 mg/L dissolved oxygen and gave the best result of mangrove crabs production performance  with 60% survival, 0.83±0.03 g/day absolute growth rate and food conversion ratio 1.1. It also showed good response to the stress that indicated by the cortisol level (10.159 µg/dL). The best results of coefficient of diversity showed by D treatment that was 13.5%. The water quality during study period was fluctuative as affected by different dissolved oxygen value.</p><p class="NoParagraphStyle"> </p><p class="NoParagraphStyle">Keyword: mangrove crabs, dissolved oxygen, production performance</p><p class="NoParagraphStyle"><strong> </strong></p><p class="NoParagraphStyle"><strong> </strong></p><p class="NoParagraphStyle"><strong>ABSTRAK</strong><strong></strong></p><p class="NoParagraphStyle"><strong> </strong></p><p class="NoParagraphStyle">Penelitian ini bertujuan menentukan kadar oksigen terlarut (OT) atau <em>dissolved oxygen</em> (DO) yang optimum melalui penentuan titik aerasi serta mengevalusi peranan oksigen terlarut terhadap kinerja produksi dan respons stres kepiting bakau <em>Scylla serrata</em>. Rancangan penelitian yang digunakan adalah rancangan acak lengkap dengan empat pelakuan (penambahan titik aerasi dengan rincian A, tidak menggunakan titik aerasi; B, satu titik aerasi; C, dua titik aerasi dan D, tiga titik aerasi) dan tiga ulangan. Kepiting bakau yang digunakan memiliki berat rata-rata 45,6±2,1 g/ekor dengan padat tebar 10 ekor/wadah. Wadah yang digunakan selama pemeliharaan adalah bak fiber plastik yang berukuran 40×30×30 cm<sup>3</sup>. Pemeliharaan kepiting bakau dilaksanakan selama 42 hari dan diberikan pakan dua kali sehari dengan metode restricted yakni sebesar 15% dari biomassa kepiting. Hasil penelitian menunjukkan bahwa perlakuan C yaitu penambahan dua titik aerasi menghasilkan nilai kelarutan oksigen rata-rata sebesar 5,51 mg/L dan memberikan hasil terbaik terhadap kinerja produksi kepiting bakau (tingkat kelangsungan hidup 60%; laju pertumbuhan mutlak 0,83±0,03 g/hari; dan rasio konversi pakan 1,1). Perlakuan C juga menunjukkan respons stres yang baik dengan memiliki nilai kortisol paling rendah dari perlakuan lain yaitu 10,159 µg/dL. Untuk parameter koefisien keragaman berat, hasil terbaik terjadi pada perlakuan D sebesar 23,3%. Kualitas air selama penelitian memiliki nilai yang fluktuatif di setiap perlakuan sebagai efek adanya perbedaan nilai kelarutan oksigen yang dihasilkan.</p><p class="NoParagraphStyle"> </p><p class="NoParagraphStyle">Kata kunci: kepiting bakau, kelarutan oksigen, kinerja produksi</p>

scholarly journals Optimization of stocking density in intensification of mud crab Scylla serrata cultivation in the resirculation system

2017 ◽  
Vol 16 (2) ◽  
pp. 253
Author(s):  
Yuni Puji Hastuti ◽  
Kukuh Nirmala ◽  
Iman Rusmana ◽  
Ridwan Affandi ◽  
Wahyu Budi Kuntari
Keyword(s):  
Stocking Density ◽  
Production Performance ◽  
Scylla Serrata ◽  
Food Conversion ◽  
Mud Crab ◽  
Absolute Growth Rate ◽  
Randomized Design ◽  
End Of Treatment ◽  
Absolute Growth ◽  
Mangrove Crabs

<p class="NoParagraphStyle"><strong>ABSTRACT</strong></p><p class="NoParagraphStyle"><strong> </strong></p><p class="NoParagraphStyle">This study aimed to determine optimum stocking density of mud crab <em>Scylla serrata</em> through the applied of different stocking density in every treatment in recirculation system. Experimental design used was complete randomized design (CRD) with three density treatments which were 5 (P1), 10 (P2), and 15 ind/container (P3). All treatments replicated three times. The crab with the average of body weight 150 g/ind cultured in a plastic box (40×30×30 cm). Crab was cultured within 60 days and were fed two times a day by at satiation method. The result showed that P2 treatment gave the best result of mangrove crabs production performance among all treatments with 73.33±5.77% survival rate, 0.68±0.01 g/ind/day absolute growth rate and food conversion ratio 10.11±0.01. Treatment P1 gave the good response of stress, it indicated by the lowest glucose of all tretamnets at the level of 31.91 mg/dL in the end of treatment periods. The water quality during study period was fluctuative as affected by different stocking density in the treatments.</p><p class="NoParagraphStyle"> </p><p class="NoParagraphStyle">Keywords: mud crab, stocking density, production performance</p><p class="NoParagraphStyle"> </p><p class="NoParagraphStyle"><strong> </strong></p><p class="NoParagraphStyle"><strong>ABSTRAK</strong><strong></strong></p><p class="NoParagraphStyle"><strong> </strong></p><p class="NoParagraphStyle">Penelitian ini bertujuan untuk menentukan padat tebar optimal kepiting bakau <em>Scylla serrata</em> melalui penerapan kepadatan tebar yang berbeda pada setiap perlakuan dalam sistem resirkulasi. Rancangan penelitian yang digunakan adalah rancangan acak lengkap dengan tiga perlakuan yaitu 5 (P1), 10 (P2), dan 15 ekor/wadah pemeliharaan (P3) dengan tiga ulangan. Kepiting bakau yang digunakan memiliki berat rata-rata 150 g/ekor. Wadah pemeliharaan yang digunakan selama pemeliharaan adalah kontainer plastik yang berukuran 40×30×30 cm. Pemeliharaan kepiting bakau dilaksanakan selama 60 hari dan diberikan pakan berupa ikan rucah dua kali sehari secara at satiation. Penelitian menunjukkan bahwa perlakuan P2 memberikan hasil kinerja produksi terbaik dibandingkan perlakuan lainnya dengan nilai kelangsungan hidup 73,33±5,77%, laju pertumbuhan mutlak 0,68±0,01 g/ekor/hari, dan rasio konversi pakan 10,11±0,01. Perlakuan P1 menunjukkan respons stres yang baik dengan memiliki nilai kadar glukosa paling rendah dari perlakuan lain yaitu 31,91 mg/dL pada akhir masa pemeliharaan. Kualitas air selama penelitian memiliki nilai yang fluktuatif di setiap perlakuan sebagai efek adanya perbedaan jumlah padat tebar setiap wadahnya</p><p class="NoParagraphStyle"> </p><p>Kata kunci: kepiting bakau, padat tebar, kinerja produksi</p>

scholarly journals Optimization of stocking density in intensification of mud crab Scylla serrata cultivation in the resirculation system

2017 ◽  
Vol 16 (2) ◽  
pp. 264
Author(s):  
Yuni Puji Hastuti ◽  
Kukuh Nirmala ◽  
Iman Rusmana ◽  
Ridwan Affandi ◽  
Wahyu Budi Kuntari
Keyword(s):  
Stocking Density ◽  
Production Performance ◽  
Scylla Serrata ◽  
Food Conversion ◽  
Mud Crab ◽  
Absolute Growth Rate ◽  
Randomized Design ◽  
End Of Treatment ◽  
Absolute Growth ◽  
Mangrove Crabs

<p class="NoParagraphStyle"><strong>ABSTRACT</strong></p><p class="NoParagraphStyle"><strong> </strong></p><p class="NoParagraphStyle">This study aimed to determine optimum stocking density of mud crab <em>Scylla serrata</em> through the applied of different stocking density in every treatment in recirculation system. Experimental design used was complete randomized design (CRD) with three density treatments which were 5 (P1), 10 (P2), and 15 ind/container (P3). All treatments replicated three times. The crab with the average of body weight 150 g/ind cultured in a plastic box (40×30×30 cm). Crab was cultured within 60 days and were fed two times a day by at satiation method. The result showed that P2 treatment gave the best result of mangrove crabs production performance among all treatments with 73.33±5.77% survival rate, 0.68±0.01 g/ind/day absolute growth rate and food conversion ratio 10.11±0.01. Treatment P1 gave the good response of stress, it indicated by the lowest glucose of all tretamnets at the level of 31.91 mg/dL in the end of treatment periods. The water quality during study period was fluctuative as affected by different stocking density in the treatments.</p><p class="NoParagraphStyle"> </p><p class="NoParagraphStyle">Keywords: mud crab, stocking density, production performance</p><p class="NoParagraphStyle"> </p><p class="NoParagraphStyle"><strong> </strong></p><p class="NoParagraphStyle"><strong>ABSTRAK</strong><strong></strong></p><p class="NoParagraphStyle"><strong> </strong></p><p class="NoParagraphStyle">Penelitian ini bertujuan untuk menentukan padat tebar optimal kepiting bakau <em>Scylla serrata</em> melalui penerapan kepadatan tebar yang berbeda pada setiap perlakuan dalam sistem resirkulasi. Rancangan penelitian yang digunakan adalah rancangan acak lengkap dengan tiga perlakuan yaitu 5 (P1), 10 (P2), dan 15 ekor/wadah pemeliharaan (P3) dengan tiga ulangan. Kepiting bakau yang digunakan memiliki berat rata-rata 150 g/ekor. Wadah pemeliharaan yang digunakan selama pemeliharaan adalah kontainer plastik yang berukuran 40×30×30 cm. Pemeliharaan kepiting bakau dilaksanakan selama 60 hari dan diberikan pakan berupa ikan rucah dua kali sehari secara at satiation. Penelitian menunjukkan bahwa perlakuan P2 memberikan hasil kinerja produksi terbaik dibandingkan perlakuan lainnya dengan nilai kelangsungan hidup 73,33±5,77%, laju pertumbuhan mutlak 0,68±0,01 g/ekor/hari, dan rasio konversi pakan 10,11±0,01. Perlakuan P1 menunjukkan respons stres yang baik dengan memiliki nilai kadar glukosa paling rendah dari perlakuan lain yaitu 31,91 mg/dL pada akhir masa pemeliharaan. Kualitas air selama penelitian memiliki nilai yang fluktuatif di setiap perlakuan sebagai efek adanya perbedaan jumlah padat tebar setiap wadahnya</p><p class="NoParagraphStyle"> </p><p>Kata kunci: kepiting bakau, padat tebar, kinerja produksi</p>

scholarly journals PENGARUH JENIS UMPAN YANG BERBEDA TERHADAP HASIL TANGKAPAN KEPITING BAKAU (Scylla serrata) DENGAN MENGGUNAKAN ALAT TANGKAP BUBU

2018 ◽  
Vol 5 (2) ◽  
pp. 119
Author(s):  
Farah Diana ◽  
Hafinuddin Hafinuddin ◽  
Muhajir Ansar
Keyword(s):  
Water Quality ◽  
Research Method ◽  
Quality Parameters ◽  
Scylla Serrata ◽  
Shark Skin ◽  
Mangrove Crab ◽  
Randomized Design ◽  
Different Types ◽  
Completely Randomized Design ◽  
Mangrove Crabs

Mangrove crab (Scylla serrata) is one of the fishery commodities that have higheconomic value. In addition, mangrove crab is one of export commodities to several countries such as United States, Europe, Australia, Japan, Hongkong,Taiwan, Singapore and South Korea. In general, the fishing activities of mangrove crabs in the general waters of many fishermen use different baits,it's just not known which bait is best for catching mangrove crabs. The purpose ofthis study is to determine the effect of using different types of bait to the mangrove crab catch by using bubu and know the type of bait that is most effective against the catching of mangrove crab. This research method used Completely Randomized Design (RAL) with three treatments and three replications: P1 = shredded fish, P2 = Shark skin bark, and P3 = Chicken head bait. The parameters in this study are the number of catches, the feed response and the water quality parameters, the results of this study indicate the number of catches P1 = 55.55%, P2 = 22.22% and P3 = 33.33%. While feed response time in this research P1 = 1.61, P2 = 12.03, and P3 = 11.74. From the results of this study showed the use of different baits have a very significant effect on the number of mangrove crabs (scilla serata). While the feedback response also shows the results are very real (Fcal> Ftab).

scholarly journals Production performance and business analysis of clown loach Chromobotia macracanthus (Bleeker 1852) in recirculating systems with different stocking densities and water discharge

2021 ◽  
Vol 21 (2) ◽  
pp. 89-104
Author(s):  
Riska Puluhulawa ◽  
Tatag Budiardi ◽  
Iis Diatin ◽  
Irzal Effendi
Keyword(s):  
Water Quality ◽  
Growth Rate ◽  
Business Performance ◽  
Water Discharge ◽  
Stocking Density ◽  
Production Performance ◽  
Recirculate Aquaculture System ◽  
Randomized Design ◽  
Two Factors ◽  
Absolute Growth

Efforts to improve the production performance of clown loach in recirculate aquaculture system can be done by increasing stocking density and water discharge. This study aimed to analyze the effect of increasing stocking density and water discharge on production performance, stress response and water quality in order to obtain the best stocking density and water discharge to obtain maximum profit in a short time. A factorial completely randomized design with two factors, i.e. the stocking density of 1, 2, and 3 fish L-1 and the water discharge of 0,05; 0,10; 0,15 L s-1 was performed. The volume of water used in each aquarium was 48 L and using a ½ inch faucet stop to regulate the water discharge from the inlet pipe. Clown fish fed Tubifex sp. with a feeding frequency of two times a day according to the treatment for 60 days. The result indicates that there was no interaction between the two factors on production performance, payback period, and R/C ratio. Stocking density has a significant effect on specific growth rate, absolute growth rate of individual weight, feeding consumption rate and R/C ratio of clown loach. Stocking density and water discharge had an interaction on the visual color of pectoral and caudal fins of clown loach. Different stocking densities with the combination of water discharge in this study resulted that the water quality were within tolerable range for clown loach so that they did not experience stress, as well as high production and business performance. It is recommended to intensify clown loach with a stocking density of 3 fish L-1 and 0,15 L s-1‑ of water discharge.

scholarly journals The population and mortality characteristics of mangrove crab (Scylla serrata) in the mangrove ecosystem of Tarakan City, Indonesia

2020 ◽  
Vol 21 (8) ◽  
Author(s):  
AGUS INDARJO ◽  
Gazali Salim ◽  
MUFRIDA ZEIN ◽  
DODDY SEPTIAN ◽  
STEPHANIE BIJA
Keyword(s):  
Carapace Length ◽  
Total Mortality ◽  
Condition Index ◽  
Mangrove Ecosystem ◽  
Scylla Serrata ◽  
Primary Data ◽  
Allometric Growth ◽  
Male And Female ◽  
Mangrove Crab ◽  
Mangrove Crabs

Abstract. Indarjo A, Salim G, Zein M, Septian D, Bija S. 2020. The population and mortality characteristics of mangrove crab (Scylla serrata) in the mangrove ecosystem of Tarakan City, Indonesia. Biodiversitas 21: 3856-3866. The mangrove crab is an iconic species of Tarakan City and is often is used as a souvenir. However, the high demand for this species can cause its population to decline. This study aimed to characterize the mangrove crab (Scylla serrata) population in the mangrove ecosystem of Tarakan City, North Kalimantan, Indonesia. This study was designed using a quantitative descriptive method with a case study model. The samples of mangrove crabs were obtained from 6 different stations using a purposive sampling method. The mangrove crab specimens were caught using 35-50 units of crab traps known as the ambau brackets. The primary data included carapace length, carapace width, carapace thickness, sex, and the total weight of each mangrove crab specimen. The results showed that male mangrove crabs have positive allometric growth when the condition index was fat. However, female crabs exhibited negative allometric growth when the condition index was thin. The Von Bertalanffy growth model analysis showed that the maximum carapace length of male mangrove crab in the mangrove ecosystem of Tarakan City was approximately 11.1118 cm for 189 days, while the female length was 9.6474 cm for 80 days. The total mortality value of male and female crabs was 120.01% and 154.94%, the mortality due to fishing was 84.69% and 135.75%, and natural mortality was 35.32% and 19.2%, respectively. The estimated rate of exploitation of both male and female crabs was 70.57% and 87.61%, respectively. The exploitation of S. serrata in the mangrove ecosystem of Tarakan City was evident, hence, conservation efforts are urgently required.

scholarly journals Production performance and physiology response of Anguilla bicolor bicolor rearing with a wet, damp and dry system

2020 ◽  
Vol 20 (2) ◽  
pp. 117
Author(s):  
Eko Harianto ◽  
Eddy Supriyono ◽  
Tatag Budiardi ◽  
Ridwan Affandi ◽  
Yani Hadiroseyani
Keyword(s):  
Growth Rate ◽  
Performance Studies ◽  
Body Height ◽  
High Water ◽  
The Body ◽  
Production Performance ◽  
Feed Conversion ◽  
Randomized Design ◽  
Commercial Feed ◽  
Absolute Growth

Aquaculture is is often constrained by the availability of water, both in quality and quantity. The aim of this study was to determine the optimum maintenance system of elver (Anguilla bicolor bicolor) on a wet, moist and dry system through production performance studies and physiological responses. The research was conducted from August to September 2018 at the Production Technic and Management of Aquaculture Laboratory, Department of Aquaculture, IPB University. A completely randomized design with 5 treatments and 3 replications was used in this study, namely treatment with high water wet system 0% of body height (A), high water wet system 50% of body height (B), high water wet system 100% of body height (C), moist system (D), and dry system (E). The body weight of elver was 18.80 ± 0.62 g which derived from fish cultivator in Bogor, West Java. Fish was fed 3 times per day at satiation with commercial feed which a protein content of 50%. Results showed that treatment C was the best result with survival rate of 100%, the specific growth rate of 0.45% day -1, the absolute growth rate of 0.07 g day 1 and feed conversion ratio of 6.57. The analysis of variance showed that the treatments showed the significant effect (P <0.05). The blood glucose value closest to the eel condition before treatment was found in the treatment C.

scholarly journals Pengaruh ekstrak minyak cumi pada umpan bubu terhadap hasil tangkapan kepiting bakau dan rajungan di Perairan Malise Kecamatan Tabukan Tengah

2016 ◽  
Vol 2 (3) ◽  
Author(s):  
Maichel Arvan Pananggung ◽  
Ivor L. Labaro ◽  
Emil Reppie
Keyword(s):  
Coastal Waters ◽  
Scylla Serrata ◽  
Fishing Gear ◽  
Swimming Crab ◽  
Portunus Pelagicus ◽  
Mangrove Crab ◽  
Gill Net ◽  
Oil Extract ◽  
Mangrove Crabs ◽  
By Catch

ABSTRACT Mangrove crab (Scylla serrata) and swimming crab (Portunus pelagicus) are economically important marine commodities produced from the coastal waters of Sangihe Islands Regency. But those marine commodity products are usually only caught accidentally with a bottom gill net. There has been a special trap fishing gear for that resources, but not known well by local fishermen. Addition of squid oil extraction baits could increase the fishing power of mangrove crab and swimming crab traps. This research aims to study the effect of squid oil extract on traps bait to catch mangrove crab and swimming crab; and identify the types of biota captured. This research was done in coastal waters of Malise village, Tabukan Tengah District of Sangihe Islands Regency for 2 weeks September 2015; based on experimental method. Six unit traps were operated ten trips where three units of them used scad mackerel bait that injected with squid oil extract, and tree other units just used scad mackerel bait without extract; and the capture data were analyzed using t test. The catch was 142 individuals (135 mangrove crabs and 7 swimming crab); where 86 crabs was caught by scad mackerel bait with squid oil extract, and 56 crabs caught with bait without squid oil extract. The analysis showed that the use of squid oil extracts on trap baits increased the catch. Keywords: mangrove crab, swimming crab,trap baits, squid oil extract, Sangihe   ABSTRAK[1] Kepiting bakau (Scylla serrata) dan rajungan (Portunus pelagicus) merupakan komoditi hasil laut ekonomis penting yang dihasilkan dari perairan pantai Kabupaten Kepulauan Sangihe. Tetapi komoditi hasil laut tersebut biasanya hanya tertangkap tanpa sengaja (by catch) dengan jaring insang dasar. Sebenarnya telah ada alat tangkap bubu khusus untuk kepiting bakau dan rajungan, tetapi belum dikenal oleh nelayan lokal. Pemberian ekstrak minyak cumi pada umpan, diduga dapat meningkatkan kemampuan tangkap dari bubu kepiting bakau dan rajungan. Penelitian ini bertujuan untuk mempelajari pengaruh ekstrak minyak cumi pada umpan bubu terhadap hasil tangkapan kepiting bakau dan rajungan, dan mengidentifikasi jenis-jenis biota yang tertangkap. Penelitian ini dilakukan di perairan Malise Kecamatan Tabukan Tengah, Kabupaten Kepulauan Sangihe; selama 2 minggu pada bulan September 2015; yang didasarkan pada metode eksperimental. Enam unit bubu dioperasikan selama sepuluh trip untuk mengumpulkan data; di mana tiga unit menggunakan umpan ikan layang yang disuntikan ekstrak minyak cumi, dan tiga unit lainnya hanya menggunakan umpan ikan laying tanpa ekstrak; dan data dianalisis dengan uji t. Tangkapan total berjumlah 142 ekor (135 ekor kepiting bakau dan 7 ekor rajungan); di mana 86 ekor tertangkap dengan umpan layang yang diberi ekstrak minyak cumi, dan 56 ekor tertangkap dengan umpan tanpa ekstrak. Hasil analisis menunjukkan bahwa penggunaan ekstrak minyak cumi pada umpan bubu, memberikan hasil tangkapan yang sangat berbeda dibandingkan dengan umpan tanpa ekstrak minyak cumi. Kata-kata kunci: kepiting bakau, rajungan, umpan bubu, ekstrak minyak cumi, Sangihe  

scholarly journals KAJIAN RESIKO KEPITING BAKAU (Scylla serrata) DI ESTUARI MAHAKAM, KALIMANTAN TIMUR

2019 ◽  
Vol 25 (1) ◽  
pp. 15
Author(s):  
Aisyah Aisyah ◽  
Setiya Triharyuni ◽  
Eko Prianto ◽  
Husnah Husnah
Keyword(s):  
Natural Resource ◽  
Scylla Serrata ◽  
Risk Level ◽  
Mud Crab ◽  
Susceptibility Analysis ◽  
Fish Resources ◽  
Mangrove Crab ◽  
Medium Level ◽  
Mangrove Crabs ◽  
Ecosystem Changes

Kawasan estuari merupakan wilayah yang kaya akan unsur hara di daerah pantai. Perubahan ekosistem pantai, seperti terjadinya pendangkalan menyebabkan penurunan luasan mangrove. Dampak yang terjadi merupakan penyumbang bagi kerentanan sumberdaya kepiting bakau di daerah tersebut. Tujuan penelitian ini adalah untuk mengetahui tingkat resiko potensi kerentanan sumber daya kepiting bakau dan keberlanjutannya di estuari Sungai Mahakam Kalimantan Timur. Analisis kerentanan menggunakan perangkat lunak PSA (Productivity and Susceptibility Analysis). Hasil analisis menunjukkan bahwa potensi kepiting bakau di Eestuari Mahakam mempunyai kerentanan tingkat rendah (tingkat kerentanan =1,3). Nilai produktivitas (kemampuan pulih sumber daya) menunjukan nilai yang lebih tinggi (2,1) dari pada nilai susceptabilitas (tingkat resiko sumber daya ikan terhadap aktivitas perikanan di perairan tersebut) yaitu 1,9. Dengan kondisi tersebut maka peluang keberlanjutan ketersediaan kepiting bakau di estuari Mahakam berada dalam tingkat sedang.Estuaries constitute an extremely valuable natural resource in the coastal areas. The coastal ecosystem changes such as deforestation of the estuarine caused the decrease of mangrove forestry. These impacts directly contribute to the vulnerability of mud crab resources. The purpose of this research was to determine the risk level of potential vulnerability of mangrove crab resources in the Mahakam estuary. Vulnerability analysis using Productivity and Susceptibility Analysis (PSA) software. The results showed that mangrove crabs in the Mahakam estuary were low vulnerable (vulnerability level of 1.3). Value of productivity (the ability to recover resources) higher than susceptibility (level of risk of fish resources to fisheries activities in those areas). It, means that the chances for sustainability of mangrove crab in Mahakam estuary were medium level.

scholarly journals Ekosistem mangrove sebagai habitat kepiting bakau (Scylla Serrata) di Kampung Nipah Desa Sei Nagalawan Kecamatan Perbaungan Serdang Bedagai Provinsi Sumatera Utara

DEPIK ◽  
2018 ◽  
Vol 7 (1) ◽  
pp. 84-90
Author(s):  
Sari Marina Saragi ◽  
Desrita Desrita
Keyword(s):  
Regression Analysis ◽  
Correlation Coefficient ◽  
Vegetation Structure ◽  
High Density ◽  
Scylla Serrata ◽  
A Value ◽  
Mangrove Crab ◽  
Mangrove Vegetation ◽  
Mangrove Crabs

Highly Utilization of Mangrove field as cultivation field of fish and recreation and tour site by people have big posses to the abundance of Mangrove crab (Scylla serrata) because of mangrove play role as habitats of mangrove crabs. The research was conducted for two months from December 2016 to January 2017. This study aims to see the structure of mangrove vegetation, the abundance of Mangrove Crab and the influence of mangrove vegetation structure on the abundance of Mangrove Crab in Kampung Nipah. The results of this research are Vegetation structure of Mangrove in the station I and II show high density, whereas density in station III wide apart. The abundance of mangrove crab in the station I and II showed the higher result from station III. The Influence of Vegetation Structure of Mangrove and Abundance of Mangrove Crab can be related by using regression analysis Y = 0.0241x + 113.6. The correlation coefficient (r) that value obtained as 0.79 have a meaning the connection between mangrove density and abundance of mangrove crab are rated in the strong category that has a value 79%. The density of Mangrove to 1000 units will rise up the abundance of mangrove crab to 43.5 an individual. Tingginya pemanfaatan mangrove sebagai lahan budidaya ikan dan sebagai wisata rekreasi oleh masyarakat sangat mempengaruhi kelimpahan Kepiting Bakau (Scylla serrata) karena hutan mangrove merupakan habitat bagi Kepiting Bakau. Penelitian ini dilaksanakan selama dua bulan yaitu bulan Desember 2016 sampai Januari 2017. Penelitian ini bertujuan untuk melihat struktur vegetasi mangrove, kelimpahan Kepiting Bakau dan pengaruh struktur vegetasi mangrove terhadap kelimpahan Kepiting Bakau di Kampung Nipah. Hasil dari penelitian struktur vegetasi mangrove di stasiun I dan II memiliki kerapatan sangat padat, sedangkaan kerapatan di stasiun III jarang. Kelimpahan Kepiting Bakau di Stasiun I dan II lebih tinggi dari kelimpahan di stasiun III. Pengaruh kerapatan mangrove dan kelimpahan Kepiting Bakau diperoleh persamaan regresi yaitu Y = 43,521 +  0,2061x.  Koefisien korelasi (r) yang diperoleh 0,79 yang artinya hubungan kerapatan mangrove dan kelimpahan Kepiting Bakau tergolong kuat yaitu sebesar 79%. Kerapatan mangrove sebanyak 1000 satuan akan meningkatkan kelimpahan Kepiting Bakau sebesar 43,5 individu.

scholarly journals KAJIAN PENDAPATAN NELAYAN KEPITING BAKAU (Scylla serrata) DI KECAMATAN SAMATIGA KABUPATEN ACEH BARAT

2018 ◽  
Vol 5 (1) ◽  
pp. 37
Author(s):  
Teuku Amarullah ◽  
Syarifah Zuraidah ◽  
Gunawan Gunawan
Keyword(s):  
Qualitative Analysis ◽  
Sampling Method ◽  
Scylla Serrata ◽  
Research Purpose ◽  
Selling Price ◽  
Average Amount ◽  
Mangrove Crab ◽  
Gross Income ◽  
Mangrove Crabs ◽  
One Year

The research has been conducted on "The Study of Fishermen’s Income of Mangrove Crabs (Scylla serrata) in the Samatiga District of West Aceh Regency". This research purpose is to analyze the income of fishermen’s mangrove crabs and to determine the feasibility of mangrove crab business. In this research, the sampling method by using census, amount of sampling as much as 11 fishermen. To know the level ofthe income in fishermen mangrove crabs in the Samatiga District by using quantitative and qualitative analysis. The average of amount of mangrove crabs production produced by each fisherman in one year is about 689,23 kg with the selling price of Rp. 50.000/kg. The average amount of gross income earned by each fisherman is Rp. 34,461,818 /year and total costas much as Rp 10,112,455/year, then each fisherman earns a profit as much as Rp. 24.349.362 /year, if calculated in per month as much as Rp. 2,029.113 / month. And per day as much as Rp. 78.042 / day. R / C ratio value that is obtained is 3,40 which means such business is feasible or profitable. Keywords: Study, Fishermen's Income, Mangrove Crabs

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