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Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology

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Published by Universitas Diponegoro

ISSN : 18584748 EISSN : 25490885 DOI : -

Core Subject : Education,

Education

SAINTEK PERIKANAN (p-ISSN: 1858-4748 dan e-ISSN: 2549-0885) adalah jurnal ilmiah perikanan yang diterbitkan oleh Jurusan Perikanan Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro. Jurnal ini diterbitkan 2 (dua) kali setahun (Februari dan Agustus).

Arjuna Subject : -

Articles 491 Documents

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TINGKAT KESESUAIAN LINGKUNGAN PERAIRAN HABITAT TERIPANG (ECHINODERMATA : HOLOTHUROIDAE) DI KARIMUNJAWA (Environmental Suitability for Holothuroidea Habitat in Karimunjawa) Bambang Sulardiono; Pujiono Wahyu Purnomo; Haeruddin Haeruddin
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 12, No 2 (2017): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Ekosistem terumbu karang Karimunjawa menyediakan habitat yang baik bagi kehidupan dan perkembangbiakan teripang. Di sisi lain, peningkatan beban limbah organik baik bersumber dari daratan maupun dari lingkungan perairan itu sendiri diduga menyebabkan daya dukung untuk kehidupan teripang menurun. Berdasarkan hal tersebut, bagaimana kondisi lingkungan perairan ditinjau dari kesesuaian lingkungan perairan habitat teripang. Pengukuran data kualitas air diambil pada 5 stasiun pengamatan. Data arus berdasarkan data pasang surut terendah, yang diperoleh dari pengukuran data pasang surut stasiun LPWP Jepara periode 2010-2011, pengukuran data variabel kedalaman perairan (m), suhu (°C), salinitas (‰), dan pH secara in situ, serta pengukuran kandungan oksigen terlarut (mg/l) secara laboratoris. Analisis data tingkat kesesuaian lingkungan teripang didasarkan atas beberapa kriteria penting yang harus dipenuhi, yaitu kondisi lingkungan yang sesuai dengan standar kriteria kesesuaian, meliputi kisaran dibawah baku mutu dengan skor (1), kisaran toleransi dengan skor (2), dan kisaran optimal dengan skor 3. Selanjutnya dilakukan pembobotan setiap variabel dalam 3 kelas bobot yang diukur berdasarkan tingkat pengaruh masing-masing variable. Berdasarkan hasil perhitungan total skor (Y) dari 6 variabel kualitas perairan.diperoleh jumlah skor tertinggi 54 dan terendah 6, sedangkan berdasarkan nilai interval kelas kesesusian (I) sebesar 16. Hasil analisis skor per kelas adalah (a) 39–54 = Sesuai (S1), (b) 23–38 = Cukup Sesuai (S2), dan (c) 6–22 = Tidak Sesuai (N). Hasil analisis diperoleh informasi bahwa kondisi lingkungan perairan cukup sesuai bagi kehidupan teripang. The Karimunjawa waters reef ecosystem provides a good habitat for the life and breeding of sea cucumbers. On the other hand, the increased burden of organic waste both from the mainland and from the water environment itself is thought to cause the carrying capacity for the life of sea cucumbers declined. Based on this, then how the condition of the aquatic environment in terms of the suitability of the marine environment habitat sea cucumbers. Measurement of water quality data was taken at 5 observation stations. Current data based on the lowest tidal data, obtained from the measurement of the tidal data of LPWP station Jepara period 2010-2011. Measurement of water depth variable (m), temperature (°C), salinity (‰), and pH in situ, and dissolved oxygen content (mg/l) in laboratory. The data analysis of the suitability level of sea cucumber is based on several important criteria that must be fulfilled, that is environmental condition in accordance with standard of conformity criterion, covering range below standard quality with score (1), tolerance range with score (2), and optimal range with score 3, Then weighted each variable in 3 weight classes measured by the influence level of each variable, Based on the result of total score calculation (Y) from 6 water quality variables. Based on the result of total score (Y) of 6 water quality variables. Obtained by the highest score 54 and lowest 6, whereas based on the value of interval of suitability class (I) of 16. The result of the score analysis per class is (a) 39–54 = Suitable (S1), (b) 23–38 = quite suitable (S2), and (c) 6–22 = Not Match (N). The result of the analysis obtained information that the condition of the aquatic environment is quite suitable for the life of sea cucumber.

Analysis of Ex Disposal Area Land Use For Agriculture Activity and Mangrove Ecosystem in Segara Anakan Regency Based on Geography Information System Churun A’in; Subiyanto Subiyanto; Agus Hartoko
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 5, No 2 (2010): Jurnal Saintek Perikanan
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

The aim of research was to study potential land location and width of EDA as agriculture activity and mangrove ecosystem, based on land suitability. The research methode was descriptive case study and sampling method used was purposive sampling, including 2 sampling periods (rainy and dry season). The location in this research was Ex Disposal Area (EDA), consist of Klaces, Panikel and Ujunggagak district were involved. Research variabel are soil quality (land quality), water quality and EDA’s environment parameters. Analysis data using GIS, proccess by ER Mapper 7,0 and ArcGIS 9,3 software. The concept of suitability level by scoring method combining values and weight variable. Result of esearch showed that potential land for fisheries activity (pond land) are: moderately suitable class (S2) is 5,309.05 m2, include Panikel and Ujunggagak district; marginally suitable class (S3) is 77,325.77 m2, not suitable for present time class (N1) is 1,365,955.67 m2, and permanently unsuitable class (N2) is 7,583,809.51 m2. S3, N1,N2 class were found in Panikel, Klaces and Ujunggagak district. Potential land for agriculture activity (rice field) are : moderately class (S2) is 2,051,725.30 m2; marginally suitable class (S3) is 54,083.03 m2, width of not suitable for present time class (N1) is 2,416,591.48 m2, and permanently unsuitable (N2) is 4,510,000.20 m2. Fourth classes of potential land for agriculture activity (farming land) exist in Panikel, Klaces and Ujunggagak district. Potential land for mangrove ecosystem are : marginally suitable class (S3) is 401.64 m2, found in Ujunggagak district ; not suitable for present time class (N1) is 1,046.59 m2, include Panikel dan Ujunggagak district, and permanently unsuitable class (N2) is 9.030.951,77 m2. This class are found in Panikel, Klaces and Ujunggagak district. Key Words : Land Use, EDA, GIS.

EFEKTIVITAS EKSTRAK LAMUN Cymodocea rotundata, Thalassia hemprichii, DAN Enhalus acoroides DARI PERAIRAN JEPARA SEBAGAI ANTIBAKTERI PADA FILLET IKAN NILA (Oreochromis niloticus) SELAMA PENYIMPANAN DINGIN (Effects Of Seagrass Extracts Cymodocea rotundata, Thalassia hemprichii, and Enhalus acoroides From Jepara As Antibacterials On Tilapia (Orechromis niloticus) Fillets During Cold Storage) Nikolaus Eric Pradana; Fath F Wardiwira; Luqmanul Hakim; Azizatul Nur Imamah; Winne Istianisa
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 13, No 2 (2018): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Penanganan fillet ikan nila segar merupakan bagian penting karena dapat mempengaruhi mutu. Ikan nila memiliki pH mendekati netral yang merupakan media untuk pertumbuhan bakteri pembusuk maupun mikroorganisme lain sehingga mudah mengalami pembusukan. Penambahan bahan antibakteri dari jenis lamun diharapkan mampu menambah masa simpan fillet ikan nila. Ketiga jenis lamun, yaitu Cymodocea rotundata, Thalassia hemprichii, dan Enhalus acoroides digunakan pada penelitian pendahuluan, selanjutnya diambil salah satu yang terbaik untuk masuk dipenelitian utama. Lamun dikeringkan dengan cara diangin-anginkan, lamun kering diekstrak dengan etanol 96% selama 2 x 24 jam dengan perbandingan bahan : pelarut (1 : 5). Ekstrak lamun disaring untuk memisahkan residu dan pelarut, filtrat diuapkan menggunakan rotary evaporator. Fillet ikan nila direndam ekstrak lamun dengan konsentrasi 20%, 25%, dan 30% selama 2 jam, kemudian diuji TPC dan organoleptik. Berdasarkan hasil penelitian pendahuluan didapatkan Enhalus accoroides dengan konsentrasi 25% merupakan konsentrasi terbaik berdasarkan nilai TPC dan organoleptik. Penelitian selanjutnya adalah menambahkan ekstrak lamun Enhalus acoroides 25% dan tanpa penambahan ekstrak Enhalus acoroides sebagai control. Fillet dikemas menggunakan plastik seal dan disimpan pada suhu dingin 4oC dalam refrigerator dengan lama penyimpanan 0, 3, 6, 9, dan 12 hari. Fillet ikan nila yang disimpan pada suhu dingin menunjukkan bahwa perbedaan penambahan lamun dan lama penyimpanan memberikan pengaruh yang nyata terhadap nilai TPC pada hari ke-12 yaitu 1,16 x 105 CFU/g, nilai TVBN 26,67 mgN/100g, dan nilai pH sebesar 7,01 Handling fresh tilapia fillets is an important part because it can affect quality. Tilapia has a pH close to neutral which is a medium for the growth of decomposing bacteria and other microorganisms so that it can easily decay. The addition of antibacterial ingredients from seagrass species is expected to increase the shelf life of tilapia fillets. The three types of seagrass, namely Cymodocea rotundata, Thalassia hemprichii, and Enhalus acoroides were used in the preliminary study, then taken one of the best to enter in the main study. Seagrass is dried by aerating, dried seagrass is extracted with 96% ethanol for 2 x 24 hours with a ratio of ingredients: solvent (1: 5). Seagrass extract is filtered to separate the residue and solvent, the filtrate is evaporated using a rotary evaporator. Tilapia fillets were soaked with seagrass extract with concentrations of 20%, 25%, and 30% for 2 hours, then tested for TPC and organoleptic. Based on the results of preliminary research, Enhalus accoroides with a concentration of 25% was the best concentration based on the value of TPC and organoleptic. The next study was to add 25% seaweed extract Enhalus acoroides and without the addition of Enhalus acoroides extract as a control. Fillets are packaged using a plastic seal and stored at a cool temperature of 4oC in a refrigerator with a storage time of 0, 3, 6, 9, and 12 days. Tilapia fillets stored at cold temperatures showed that the difference in the addition of seagrass and storage time had a significant effect on the value of TPC on day 12, that is 1,16 x 105 CFU/g, the TVBN value was 26.67 mgN / 100g, and the pH value was 7.01.

KAPASITAS PENANGKAPAN KAPAL PUKAT CINCIN DI PELABUHAN PERIKANAN NUSANTARA PEKALONGAN musyafak Musyafak; Abdul Rosyiod; Agus Suherman
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 4, No 2 (2009): Jurnal Saintek Perikanan
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

ABSTRAKIsu dan permasalahan tentang kapasitas penangkapan (fishing capacity) telah menjadi hal penting bagi pengelolaan perikanan tangkap yang bertanggung jawab dan berkelanjutan. Penelitian ini bertujuan untuk mengetahui efisiensi perikanan Pukat Cincin dalam jangka panjang (antar tahun) maupun jangka pendek (antar kapal) serta mengestimasi proyeksi perbaikan efisiensi kapal-kapal pukat cincin di Pelabuhan Perikanan Nusantara (PPN) Pekalongan. Penelitian ini telah dilaksanakan pada bulan November 2007-Januari 2008 di PPN Pekalongan, Jawa Tengah. Metode penelitian yang digunakan adalah deskriptif yang bersifat studi kasus. Analisis data menggunakan metode Data Envelopment Analysis (DEA) yang berorientasi pada pendekatan input dan output. Hasil penelitian menunjukkan bahwa telah terjadi kondisi kapasitas berlebih (excess capacity) pada perikanan Pukat Cincin di PPN Pekalongan baik dalam jangka panjang (10 tahun) secara agregat maupun dalam jangka pendek pada kapal-kapal Pukat Cincin.Kata Kunci : Kapasitas penangkapan, Efisiensi, Kapasitas berlebih (excess capacity), Pukat cincinABSTRACTIssue and problem of fishing capacity had become the important thing for management capture fishery which responsibility and continuity. This research is used for a long time and for short time, and eficiency repair project estimation of Purse seine ship in Pekalongan Fishing Port (PFP). This research had done at November 2007-January 2008. In Pekalongan Fishing Port, Central Java. The research method in used is descriptive method with study of case. The data analyse is using Data Envelopment Analysis (DEA) Method which orientation to input and output. The output of this research explain the excess capacity of Purse seine fishery in PFP not only for a long time (ten years) but also for a short time in Purse seine ship.Keyword : Fishing capacity, Eficiency, Excess capacity, Purse seine

MUTU KECAP IKAN YANG TERBUAT DARI ISI PERUT IKAN MANYUNG (Arius thalassinus) DENGAN KONSENTRASI GARAM YANG BERBEDA (Quality Of Fish Sauce That Made From Viscera Of Marine Catfish (Arius thalassinus) With Different Salt Concentrations) Puji Widyastuti; Putut Har Riyadi; Ratna Ibrahim
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 9, No 2 (2014): JURNAL SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Kecap ikan merupakan produk fermentasi ikan yang dibuat dari ikan maupun limbah ikan dan garam. Pengolahan kecap ikan membutuhkan waktu yang lama dan rasa produknya sangat asin. Rasa sangat asin pada kecap ikan dapat dikurangi dengan mengurangi konsentrasi garam. Penelitian ini bertujuan untuk mengetahui pengaruh perbedaan konsentrasi garam (NaCl) terhadap sifat fisikawi, kimiawi, dan nilai hedonik serta mengetahui konsentrasi garam terbaik pada proses pengolahan kecap ikan dari isi rongga perut ikan Manyung. Hasil penelitian menunjukkan bahwa perlakuan perbedaan konsentrasi garam menyebabkan kadar garam, pH, rendemen, warna dan nilai hedonik produk berbeda nyata (P<0.05) diantara perlakuan. Semakin tinggi penambahan konsentrasi garam makin tinggi kadar garam rendemen, nilai hedonik, tetapi makin rendah nilai pH. Penambahan konsentrasi garam terbaik pada pengolahan kecap ikan dari isi rongga perut ikan Manyung yaitu 25% dengan kriteria kadar garam produk (28.14%), pH (5.36), rendemen (48.54%), warna kuning kecoklatan dan disukai panelis dengan nilai hedonic (6.80 ≤µ≤ 6.88). Kadar garam dan nilai pH produk memenuhi persyaratan kecap ikan berdasarkan SNI dan Thai Standard Industrial Institute. Kata kunci : Kecap Ikan, Isi Rongga Perut Ikan Manyung, Konsentrasi Garam, Mutu Fish sauce is a fish fermentation product made from fish or fish waste and salt. Processing of fish sauce generally takes a long time and the product is very salty. The salty taste of fish sauce can be reduced by reducing the concentration of salt used. The study was aimed to determine the effect of different salt concentrations (NaCl) to the physical and chemical characteristics, hedonic value of the product and to determine the best salt concentration in processing of fish sauce made from marine Catfish’s viscera. The results showed that different salt concentrations caused salt content, pH, yield, colour and hedonic value of the products using significant different in (P<0.05). The higher the adding of salt concentration, the higher the salt content, yield, hedonic value, but the pH value was lower. The best salt concentration used in fish sauce processing made of marine Catfish viscera was 25%. The product had salt conctent (28.14%), pH (5.36), yield (48.54%), browny-yellow in colour and the hedonic value was (6.80≤µ≤6.88). The salt concentration and pH value of the product comply with the SNI and Thai Standard Industrial Institute for fish sauce. Key words : Fish Sauce, Viscera of Marine Catfish, Salt Concentration, Quality

Some Efforts to Improve Business Performance Improvement Through Fishery Business Environment in Cantrang (Boat Seine) and Local Government Policies in The District Rembang Peny Kusumawati
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 6, No 1 (2010): Jurnal Saintek Perikanan
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Fishing effort is one of economic activities so that in running its activities are always based on economic considerations for businesses that run to generate profits. Fishing effort has not been able to contribution a larger potion to develop Central Java economy. This is because the factors that affect fishing effort. Therefore, the government should take steps to of improve economic development, especially in the field of fisheries. The purpose of this study is to determine the environmental impact of fishing effort to the performance of fisheries, fishery business environment, and government policies on the performance of the fishery business in district Rembang. The research was conducted in Rembang in April - May 2008. The method used is descriptive by counducting survey. Primary sources of data the fishermen community. The method to determine the respondents by using purposive sampling method. Collected data were analyzed using descriptive statistics, the presentation of data displayed in a frequency distribution table. To test the hypothesis proposed in this research by using, data analysis technique SEM (Structural Equation Modelling) which is operated using the program AMOS 6. The results of research shows the significance level of 5% positive effect on the business environment business performance with the calculated value of t (4.468)> | 1.96 |. By lookong at, the business environment variables fisheries, fishery performance cantrang can increase the business environment has positive influence on local government policy variables with t-count value (7.017)> | 1.96 |. Government policy is able to increase fishing effort. Capital with low interest rates is able to help fishermen catch fish in running the business. Local government policy has positive influence on business performance variables in thecapture fisheries with t-count (2.311)> | 1.96 |. Capital with low interest rates can increase the performance of the fishery business in the distric of Rembang. In conclusion the fishermen to obtain capital to improve fishing business. Key Wards : Business Environment, Performance, Government Policies

PENGARUH PENAMBAHAN MgCO3 DAN ZnCl2 TERHADAP STABILITAS KANDUNGAN PIGMEN KLOROFIL PADA MIKROALGA Spirulina platensis Puguh Udiarta; Eko Nurcahya Dewi; Romadhon Romadhon
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 10, No 2 (2015): JURNAL SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

The Effect Addition of Stabilizer MgCO3 and ZnCl2 on The Color Stability of Chlorophyll Pigment Content Microalgae Spirulina platensis ABSTRAK Klorofil merupakan salah satu pigmen yang ada pada S. Platensis memiliki warna hijau. Klorofil bersifat sangat labil dan mudah terdegradasi. Penanganan secara kimiawi dapat dilakukan dengan menambahkan zat penstabil seperti MgCO3 dan ZnCl2. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan MgCO3 dan ZnCl2 sebagai penstabil terhadap stabilitas warna pigmen klorofil dan mengetahui pH terbaik terhadap stabilitas warna pigmen klorofil S. platensis. Materi yang digunakan dalam penelitian ini adalah mikroalga S. platensis bubuk. Penelitian ini dilakukan dengan metode percobaan laboratoris menggunakan rancangan dasar acak lengkap dengan pola percobaan split plot in time. Perlakuan pada penelitian ini adalah tanpa penambahan penstabil (kontrol), ditambahkan 0,1% MgCO3 dan ZnCl2 secara terpisah pada pelarut aseton serta perlakuan kombinasi. Penelitian ini dilakukan 3 kali ulangan dan lama penyimpanan selama 12 hari dengan interval waktu 4 hari. Hasil penelitian menunjukkan bahwa penambahan ZnCl2 menyebabkan laju degradasi yang lebih kecil dari MgCO3, dimana ZnCl2 menghasilkan kandungan klorofil a sebesar 15,41 µg/g pada lama penyimpanan hari ke 0 dan 7,73 µg/g pada lama penyimpanan hari ke 12. Nilai klorofil b sebesar 22,12 µg/g pada lama penyimpanan hari ke 0 dan 10,65 µg/g pada lama penyimpanan hari ke 12. Sedangkan nilai pH penambahan MgCO3 menyebabkan degradasi yang lebih kecil dari ZnCl2, dimana MgCO3 memiliki nilai pH sebesar 7,80 pada lama penyimpanan hari ke 0 dan 6,78 pada lama penyimpanan hari ke 12. Nilai total perubahan warna (ΔE) sebesar 7,06 pada lama penyimpanan hari ke 4 dan 12,96 pada lama penyimpanan hari ke 12. Kata kunci : MgCO3, ZnCl2, Stabilitas, Klorofil, S. platensis Chlorophyll is a green pigment in Spirulina platensis. Chlorophyll is extremely labile and easily degraded.Chemical handling can be done by adding a stabilizing agents such as MgCO3 and ZnCl2. This study was aimed to determine the addition of MgCO3 and ZnCl2 as a stabilizer to the chlorophyll pigments stability and determine the best pH chlorophyll pigments stability in S. platensis. The material used in this study was S.platensis powder.This research was conducted with a laboratory experiment using a completely basic randomized design with split plot in time patterns test. Treatment on this research were without the addition of stabilizers (control), adding 0,1% MgCO3 and 0,1% ZnCl2 separately on the solvent acetone and combinations (MgCO3 and ZnCl2). Each treatment was repeated in triplicate for 12 days of storage with intervals 4 days for analysis. The results showed that the addition of ZnCl2 affect to slower degradation of chlorophyll than that one. ZnCl2 addition produces chlorophyll 15,41 µg/g at 0 day of storage and 7,73 µg/g on the 12 days of storage. However, the value of chlorophyll b was 22,12 µg/g at 0 day of storage and 10,65 µg/g at 12 days of storage. Meanwhile the pH value of MgCO3 addition showed slower degradation than ZnCl2,which pH value of MgCO3 was 7,80 on 0 day of storage and 6,78 at 12 days of storage. The value of the total color change (ΔE) was 7,06 on the 4th day of storage and 12,96 on day 12th of storage.Keywords : MgCO3, ZnCl2, Stability, Chlorophyll, S. platensis

The Influence of Depth of Plantation to the Growth Rate of Eucheuma cottonii Seaweed Cultivated by Longline Method in Mlonggo Beach, Jepara Regency Susilowati, Titik; Rejeki, Sri; Zulfitriani, Zulfitriani; Dewi, Eko Nurcahya
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 8, No 1 (2012): Jurnal Saintek Perikanan
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

The aim of the research was to evaluate the influence of three different depth of plantation of Eucheuma cottonii seaweed to the relative and daily growth rate of seaweed. The experiment was designed using a Completely Randomized Design with 3 treatments (25, 50 and 75 cm) depths of Eucheuma cottonii seaweed. Each treatments was done in triplicate. Data of the relative and daily growth rate of seaweed are expressed as mean ± standard deviation and then were analysed using one way Analysis of Variance (ANOVA). A Duncan Multiple test was applied to find out the difference among the treatments. Based on the results, the different depth of plantation gave a highly significant influence (p<0.01) to the the relative and daily growth rate of seaweed. The treatment for 25 cm of the depth plantation showed the relative growth of seaweed of 910% , nearly 3 times of 75cm of depth plantation. The result of this research indicated that the 25 cm depth of plantation was the best relative and daily growth rate of seaweed of all treatments. Key words : The depth of plantation , relative growth rate, daily growth rate, Eucheuma cottoniii

IDENTIFIKASI DAN KELIMPAHAN BAKTERI PADA JENIS KARANG Acropora sp. DI REEF FLAT TERUMBU KARANG PULAU PANJANG JEPARA Identification and Abundance of Bacteria In Acropora sp. at Coral Reef Flat Panjang Island Jepara Rizka Alifianita Saputri; Niniek Widyorini; Pujiono Wahyu Purnomo
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 12, No 1 (2016): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Pulau Panjang di utara Kota Jepara memiliki wilayah terumbu karang dengan jenis karang dominan yaitu Acropora sp. Ekosistem ini merupakan habitat yang mendukung kehidupan biota akuatik di sekitarnya termasuk mikroorganisme yang terdapat di dalamnya. Keberadaan bakteri di dalam koloni karang diperlukan sebagai biota pendukung sediaan nutrisi untuk proses fotosintesis zooxanthellae dalam polip karang. Tujuan dari penelitian ini adalah untuk mengetahui jenis bakteri dan kelimpahannya pada jenis karang Acropora sp. di reef flat terumbu karang di Pulau Panjang Jepara. Penelitian ini dilaksanakan pada bulan Maret-April 2016 dengan menggunakan metode deskriptif. Materi uji adalah supernatan dari Acropora sp. yang telah dicentrifuge selanjutya dilakukan isolasi bakteri, kultur, uji morfologi, dan uji biokimia. Hasil penelitian yang diperoleh adalah terdapat 3 jenis bakteri yang teridentifikasi di karang Acropora sp. yaitu Listeria sp., Bacillus sp.[1], Bacillus sp.[2] dan Micrococcus sp. Ketiga genera tersebut termasuk bakteri fakultatif dan berfungsi sebagai bakteri perombak bahan organik. Kelimpahan bakteri di karang Acropora sp. berkisar antara 1,0x104 Cfu/ml hingga 8,4x105 Cfu/ml. Pada stasiun I kelimpahan bakteri sebesar 2,0x104 Cfu/ml hingga 6,2x105Cfu/ml, stasiun II kelimpahan bakteri sebesar 1,0x104 Cfu/ml hingga 8,4x105Cfu/ml, serta pada stasiun III kelimpahan bakteri sebesar1,0x104 Cfu/ml hingga 1,3x105Cfu/ml. Kelimpahan bakteri tertinggi ditemukan pada stasiun II. Jenis bakteri Listeria sp. mendominasi dengan nilai 8,4x105 Cfu/ml sedangkan bakteri Micrococcus sp. memiliki nilai terendah yaitu 1,0x104 Cfu/ml. Panjang Island in the north of Jepara has coral reef areas which the dominant coral species is Acropora sp. This ecosystem is the habitat that supports to life for their surrounding aquatic organism, including microorganisms. The existence of bacteria in coral colonies is required to support nutrients availability for zooxanthellae photosynthesis inside coral polyps. The purposes of this study are to determine the type and abundance of bacteria present on Acropora sp. coral species on the reef flat coral reefs in Panjang Island Jepara. This study was conducted in March-April 2016 by using descriptive method. The material of research are supernatant of Acropora Sp after centrifuged and continued to isolation of bacteria, culture, morphology test and biochemical test. The results obtained is there are three species of bacteria that identified in Acropora sp. Those are, Listeria sp., Bacillus sp. [1], Bacillus sp. [2] and Micrococcus sp. All those genera include to facultativebacteria and serves as organic material decomposer bacteria. The abundance of bacteria in the Acropora sp. coral are between 1,0x104 Cfu/ml to 8,4x105 Cfu/ml. At the station I abundance of bacteria was2,0x104 Cfu/mlto 6,2x105Cfu/ml, station II abundance of bacteria was 1,0x104 Cfu/ml to 8,4x105Cfu/m, and at station III abundance of bacteria was 1,0x104 Cfu/ml to 1,3x105Cfu/ml. The highest abundance of bacteria is located at station II.The type of Listeria sp. bacteria dominates the highest value, that is 8,4x105 Cfu/ml while Micrococcus sp. bacteria has the lowest value, that is 1,0x104 Cfu/ml.

Analysis of Ex Disposal Area Land Use for Fisheries Activity (Ponds) in Segara Anakan regency Based on Geography Information System Ain, Churun
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 7, No 1 (2011): Jurnal Saintek Perikanan
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Dredging Segara Anakan lagoon that have been implemented in 1997 - 2005, has given rise to the consequences of new land from the dredging is often referred as Ex-Disposal Area. Along with the increasing socio-economic problems, this land is considered as a strategic area for use as aquaculture lands. Milk Fish (Chanos chanos) and Crab (Scylla sp) are comodity targets,that wants develop as silvofisheries program. This study aimed to determine the location and potential areas as aquaculture lands based on a suitability analysis. The research method was descriptive case study, in which a purposive sampling technique was applied to collect the samples, including 2 sampling periods (rainy and dry season). The location in this research was Ex Disposal Area (EDA), consist of Klaces, Panikel and Ujunggagak district. Research variabel were soil quality, water quality and EDA’s environment parameters. Spatial analysis data used GIS, that was proccessed by ER Mapper 7.0 and ArcGIS 9.3 software. The concept of suitability level by scoring method combining values and weight matrix. Result of research yielded that potential land for fisheries activity (brakish water ponds) were : moderately suitable class (S2) that was 5.309,05 m2, at Panikel and Ujunggagak districs; marginally suitable class (S3) is 77.325.77 m2, not suitable for present time class (N1) that was 1.365.955,67 m2, and permanently unsuitable class (N2) is 7.583.809,51 m2. Coverage area of class S3,N1 and N2 included Panikel, Klaces and Ujunggagak. Keywords : Land Use, Ex Disposal Area (EDA), Ponds, Geography Information System (GIS)

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