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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 492 Documents

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PRODUKSI Chlorella sp. DENGAN PERLAKUAN LIMBAH CAIR TAMBAK UDANG VANAME (Litopenaeus vannamei) STERIL (Production of Chlorella sp. with Steril White Shrimp (Litopenaeus vannamei) Liquid Waste Treatment) Sartika Tangguda; I Nyoman Dodik Prasetia
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 14, No 2 (2019): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

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

PERTUMBUHAN BAKTERI PROBIOTIK Alkaligenus sp. DAN Flavobacterium sp. YANG DIISOLASI DARI USUS UDANG PADA MEDIA KULTUR MOLASE DAN KAOLIN Suminto, Suminto
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 4, No 1 (2008): Jurnal Saintek Perikanan
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Penelitian ini bertujuan untuk mengetahui konsentrasi tetes tebu (molase) dan tepung kaolin yang tepat untuk media kultur massal bakteri Alkaligenes sp. dan Flavobacterium sp. pada kondisi lingkungan (suhu, salinitas, dan pH) yang terbaik bagi pertumbuhan. Metoda yang digunakan pada penelitian ini adalah eksperimen dengan 3 (tiga) macam perlakuan dan masing-masing dilakukan pengulangan sebanyak 3 (tiga) kali. Perlakuan perbedaan konsentrasi molase yaitu M1 (16 gr/mL), M2 (32 gr/mL), dan M3 (48gr/mL). Sedangkan perlakuan perbedaan konsentrasi tepung kaolin adalah K1 (8 gr/mL), K2 (16 gr/mL), dan K2 (32 gr/mL). Data yang dikumpulkan dalam penelitian ini adalah kelimpahan bakteri yang diukur melalui Opical Density pada spectrofotometer. Analisa statistik uji varian, uji wilayah ganda duncan telah digunakan dalam analisa data penelitian ini untuk mengetahui pengaruh perbedaan berbagai kondisi lingkungan media kultur. Hasil penelitian menunjukkan bahwa perlakuan perbedaan konsentrasi molase berpengaruh sangat nyata (p<0,01) terhadap pertumbuhan bakteri Alkaligenes sp. dan Flavobacterium sp. Pada perlakuan perbedaan konsentrasi tepung kaolin menunjukkan adanya pengaruh yang sangat nyata (P<0,01) terhadap pertumbuhan bakteri Alkaligenes sp., tetapi tidak berpengaruh nyata terhadap pertumbuhan bakteri Flavobacterium sp. Kata Kunci : Bakteri probiotik, pertumbuhan, jenis media, kondisi lingkungan

UJI IN VITRO DAN KARAKTER PROTEIN EKSTRASELULER (ECP) Edwardsiella tarda DENGAN KONSENTRASI ETHANOL BERBEDA (In Vitro Test and Character of Extracellular Protein (ECP) Edwardsiella tarda with Different Ethanol Concentration) Cucun Herlina; Uun Yanuhar; Maftuch Maftuch
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 15, No 2 (2019): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Protein ekstraseluler (ECP) bakteri memiliki kemampuan imunogenik dan dapat meningkatkan sistem imun tubuh inang. Komponen ECP diantaranya flagellin, protease dan metalloprotease mampu berdifusi pada sel inang untuk mengaktifkan respon imun. Tujuan penelitian adalah untuk mengetahui produksi protein ekstraseluler E. tarda dengan presipitasi ethanol pada konsentrasi berbeda sebagai potensi protein imunogenik secara in vitro. Metode penelitian yaitu kultur bakteri E. tarda, preparasi protein ekstraseluler, presipitasi protein, konsentrasi protein ditentukan denganspektrofotometer dan SDS-PAGE, uji in vitro protein ECP E. tarda, dan uji nilai RPS. Hasil protein ekstraseluler yang diperoleh dengan presipitasi ethanol tertinggi pada konsentrasi 90% sebanyak 5,69 mg/ml dan terendah pada konsentrasi 80% sebanyak 4,81 mg/ml. Hasil karakterisasi protein dengan SDS-SDSPAGE antara 30-60 kDa. Hasil uji in vitro vaksin E. tarda (presipitasi ethanol 100%) baik dari uji viabilitas maupun sterilitas menunjukkan tidak terdapat koloni yang tumbuh. Hasil nilai RPS pada ikan nila (Oreochromis niloticus) mencapai 100% dengan masa pemelihaaraan 9 hari pasca imunisasi. ECP bacteria have immunogenic abilities and can increase the host's immune system. ECP components which are flagellin, protease, metalloprotease can diffuse to host cell for the activation immune response. The study aimed to determine the production of extracellular protein E. tarda with ethanol precipitation at different concentrations as a potential immunogenic protein by in vitro test. The research methods were E. tarda bacterial culture, extracellular protein preparation, protein precipitation, protein concentration determined by spectrophotometer and SDS-PAGE, in vitro ECP E. tarda protein test, and RPS value test. The results of extracellular protein obtained by the highest ethanol precipitation at a concentration of 90% as much as 5.69 mg/ml and the lowest at 80% concentration as much as 4.81 mg/ml. The results of the characterization of proteins with SDS-SDS-PAGE between 30-60 kDa. The results of the in vitro test of E. tarda vaccine (100% ethanol precipitation) from both the viability and sterility tests showed that there were no growing colonies. The results of the RPS in tilapia (Oreochromis niloticus) reach 100% with a maintenance period of 9 days after immunization.

Development Strategy of Yellow Tail Fusilier Fish (Caesio cuning) Resources Management on Coral Ecosystem in The Seribu Islands Neviaty P Zamani; Yusli Wardiatno; Raimundus Nggajo
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 6, No 2 (2011): Jurnal Saintek Perikanan
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Population of Yellow tail fusilier fish (Caesio cuning) in Seribu Islands at this time has decreased. The main cause of decreasing in abundance of the fish is due to degradation of coral reef ecosystem as a habitat of the fish. The purposes of the study is to examine the association of Yellow tail fusilier fish resources with habitat characteristics. The study was conducted in the Seribu Islands waters on May 2009, at the four islands, each consisting of two observation locations. Percentage benthic substrate cover, and the number of coral lifeform using the Square Transect method, while to see the abundance of the fish resources using Underwater Visual Cencus. Benthic substrate cover was dominated by abiotic cover (36.42%), hard coral cover was in fair condition (32.27%), dominated by foliose coral, massive coral, acropora branching and encrusting coral. The abundance of Yellow tail fusilier fish was 67 individu/250 m2. North Pramuka, West Panggang, and South Panggang was only observed some small fishes. Closing area can be implemented for management purposes with the combination of introducing brooder. In vise versa East Pramuka and East Kayu Angin have been observed only adult fishes. Closing area can be implemented for management purposes with the combination of introducing juveniles. In West Kayu Angin closing area can be implemented to give the opportunity juvenile for growing and adult for breading. South Belanda have all range of size fishes as well as good condition of habitat. It is therefore, this can be developed as marine protected area with eco-freienly marine tourism activities. Keywords: coral reef ecosystem, fish resources, yellow tail fusilier fish, habitat linkages, Seribu islands.

EFISIENSI PRODUKSI RUMPUT LAUT E. cotonii DENGAN METODE BUDIDAYA LONG LINE VERTIKAL SEBAGAI ALTERNATIF PEMANFAATAN KOLOM AIR Lestari Lakhsmi Widowati; Sri Rejeki; Tristiana Yuniarti; Restiana Wisnu Ariyati
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 11, No 1 (2015): JURNAL SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

ABSTRAK Kualitas dan kuantitas rumput laut yang baik dan berkelanjutan merupakan hal yang masih menjadi tantangan bagi usaha budidaya. Metode budidaya danlama pemeliharaan yang tepat diharapkan dapat menjadi salah satu solusi untuk menghasilkan kuantitas dan kualitas budidaya yang berkelanjutan.Metode long line vertikal diterapkan untuk mengetahui kolom air yang dapat digunakan untuk pertumbuhan optimum rumput laut. Kualitas terbaik kandungan karaginan dilihat dari lama pemeliharaan. Tujuan penelitian adalah (1) Mengetahui interaksi lama pemeliharaan dan kedalaman terhadap produksi biomassa dan kualitas rumput laut. (2) Mengetahui lama pemeliharaan dan kedalaman yang terbaik terhadap produksi biomassa dan kualitas rumput laut. (3) Mengetahui kedalaman kolom air yang masih menghasilkan pertumbuhan rumput laut secara optimal. Penelitian dilakukan di perairan laut Pulau Pasir Kabupaten Brebes dengan lama pemeliharaan 45 hari dan 60 hari, serta 3 perlakuan pada kedalaman 30 cm, 60 cm, dan 90cm. Masing-masing perlakuan diulang 3 kali. Rancangan penelitian yang digunakan adalah rancangan faktorial 2 x 3. Variabel yang diamati adalah laju pertumbuhan dan kandungan karaginan.Hasil yang didapatkan yaitu laju pertumbuhan selama 45 hari pada kedalaman 30 cm, 60 cm dan 90 cm berturut-turut adalah 117%, 158%, 111%, dan pada pemeliharaan selama 60 hari adalah 198%, 182% dan 136%. Pada pemeliharaan 45 hari laju pertumbuhan harian pada kedalaman 30 cm, 60 cm dan 90 cm berturut-turut adalah 2,26%/hari, 2,10%/hari dan 1,66%/hari, dan pada pemeliharaan 60 hari adalah 1,82%/hari, 1,73%/hari dan 1,43%/hari. Dari segi kualitas dilihat pada kandungan karaginan menghasilkan rata-rata karaginan 76,3% pada pemeliharaan 45 hari dan 96,3% pada pemeliharaan selama 60 hari. Kesimpulan yang diambil alah bahwa (1) Kedalaman dan lama pemeliharaan memberikan pengaruh terhadap produksi biomassa dan kandungan karaginan rumput laut. (2) Produksi biomassa tertinggi dihasilkan pada pemeliharaan selama 45 hari pada kedalaman 30 cm dengan pertumbuhan harian 2,26 %/hari dan kedalaman 60 cm dengan laju pertumbuhan 2,10 %/hari. Kandungan karaginan rata-rata sebesar 96,3% didapatkan pada pemeliharaan selama 60 hari. (3) Kedalaman optimal untuk pemeliharaan rumput laut dengan metode longline vertikal adalah sampai dengan 60cm. Kata kunci : long line vertikal, E. cottoni, karaginan ABSTRACT Good quality, quantity and sustainable still a challenge for aquaculture. The right method and duration of cultivation is expected to be one of the solutions to produce a sustainable quantity and quality of seaweed culture. Long line vertical method is applied to find out the column of water that can be used for optimum growth of seaweed. The best quality of carrageenan content was observed in duration of cultivation. The purpose of the study was (1) To find out the interaction between duration of cultivation and depth for the production of biomass and quality of seaweed. (2) To know the best duration of cultivation and depth for production of biomass and quality of seaweed. (3) To find out the depth of the water column which still produces the growth of seaweed optimally. Research conducted in sea water at Pulau Pasir, Brebes Regency with duration of cultivation were 45 days and 60 days, with 3 treatments at thedepth of 30cm, 60cm, and 90cm . Each treatment was repeated three times. The research used 3 x 2 factorial design. The observed variablewere growth rate and carrageenan content. The results are obtained, relative growth rate for 45 days at a depth of 30 cm, 60 cm and 90 cm was 117%, 170%, 110%, and for duration of cultivation 60 days was 187%, 185% and 136%. In 45 days duration of cultivation, the of specific growth rate at depth of 30 cm, 60 cm and 90 cm was 2.26%/day, 2.10%/day and 1.66%/day, and on duration of cultivation 60 days is 1.82%/day, 1.73% and 1.43%/day. In terms of the quality of seaweed the average of karaginan content was 76.3% in 45 days duration of cultivation and 96.3% on 60 days duration of cultivation . The conclusions were (1) The depth and period of cultivation influence the production of biomass and karaginan content of seaweed. (2 The highest biomass production on 45 days period of cultivation at a depth of 30 cm with specific growth rate of 2.26%/day and in depth of 60 cm with specific growth rate of 2.10%/day The content of carageenan an average of 96.3% obtained on maintenance for 60 days. Optimal depth for the maintenance of seaweed with vertical longline method is up to 60 cm. Keywords : long line vertikal, E. cottoni, karaginan

Using the Live Food Enrichment with the Squid Egg Extract on the Quantity and Quality of Rotifer, Brachionus plicatilis O.F. Muller Suminto Suminto
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 3, No 2 (2008): Jurnal Saintek Perikanan
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

The Objective of the research was to know the effect of live food enrichment of rotifer with squid egg extract on the growth patterns and quality of rotifer, especially the EPA and DHA contents. The experiment method was employed in this research and it carried out in the aquaculture laboratory, Faculty of Fisheries and Marine Sciences, Diponegoro University. The research planning was a completely randomized design with five treatments and three replicates, respectively. The recording data was analyzed to get the variables of rotifer growth patterns and the most of rotifer samples were analyzed EPA and DHA contents in the chemical and biochemical laboratory center, Gajah Mada University. The results showed that the addition of squid egg extract in the culture media of rotifer was highly significant effect (p<0.01) on the specific growth rate, the maximal density, and the final density of rotifer culture. However, there was also highly significsnt effect (p<0.01) on the nutrition quality through EPA and DHA contents. To increase the quantity and quality of rotifer, B. plicatilis O.F. Muller in the culture was addition of squid egg extract of 1,2 g/1 million ind. Rotifers during twelve two hours in the rotifer culture. Key word : Rotifer, Brachionus plicatilis O.F. Muller, enrichment, quantity and quality, EPA dan DHA

KARAKTERISTIK PERMEN JELLY DENGAN PENAMBAHAN IOTA KARAGENAN DARI RUMPUT LAUT (KARAKTERISTIK PERMEN JELLY DENGAN PENAMBAHAN IOTA KARAGENAN DARI RUMPUT LAUT) Mukarima Rismandari; Tri Winarni Agustini; Ulfah Amalia
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 12, No 2 (2017): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Permen jelly merupakan permen yang memiliki tekstur kenyal. Tekstur ini terbentuk karena adanya pembentuk gel yaitu gelatin. Penggunaan gelatin dalam permen jelly masih diperdebatkan status kehalalannya, karena adanya unsur babi dalam gelatin. Sementara itu, sumber alternatif lain yang memberikan tekstur kenyal di permen jelly adalah karagenan, tetapi belum jelas sejauh mana dapat menggantikan gelatin. Tujuan dari penelitian ini adalah mengetahui pengaruh iota karagenan yang diekstrak dari Eucheuma spinosum terhadap sifat fisik dan kimia permen jelly dan formulasi terbaik dari permen jelly. Bahan yang digunakan dalam penelitian ini adalah gelatin dan tepung iota karagenan yang diekstrak dari rumput laut E. spinosum. Metode penelitian yang digunakan yaitu experimental laboratories dengan desain percobaan rancangan acak lengkap (RAL) dengan 4 perlakuan yang berbeda yaitu Gelatin : Iota Karagenan = 8% : 0% (A), Gelatin : Iota Karagenan = 0% : 8% (B ), Gelatin : Iota Karagenan = 6% : 2% (C), dan Gelatin : Iota Karagenan = 2% : 6% (D). Hasil dari penelitian ini didapatkan permen jelly terbaik sebagai alternatif pengganti gelatin yaitu perlakuan B dengan kekuatan gel 1.109,27 g.cm2 dan nilai hedonik sebesar 6,84 ≤ µ ≤ 7,52. Kadar air semua perlakuan belum memenuhi standar SNI (20%). Kadar abu semua perlakuan memenuhi standar SNI (3%). Untuk aw dan pH produk tersebut berkisar 0,84–0,89 dan 3–4 . Jelly candy which has chewy texture. This texture was formed by the gelling agent of gelatin. The use of gelatin in jelly candy still debated of halal status, because there were elements of pork in gelatin. While other alternative source which gives chewy texture in jelly candy was carrageenan, but carrageenan were used in making jelly candy was not extent to be replace of gelatin. The aim of this study was to determine the effect of iota carrageenan extracted from Eucheuma spinosum to physical and chemical characteristics of jelly candy and the best formulation of jelly candy. The materials used in the research were gelatin and powder of iota carrageenan extracted from seaweed E. spinosum. The method used was experimental laboratories by using completely randomized design (CRD) with 4 different treatments was Gelatin : Iota carrageenan = 8% : 0% (A), Gelatin : Iota carrageenan = 0% : 8% (B ), Gelatin : Iota carrageenan = 6% : 2% (C), and Gelatin : Iota carrageenan = 2% : 6% (D). The result showed that the best jelly candy as an alternative to gelatin performed by treatment B with gel strength of 1109,27 g.cm2 and the results for sensory was 6,84 ≤ µ ≤ 7,52. The water content of all treatment did not comply with ISO standard (20 %). Ash content of all treatment comply with ISO standard (3 %). For aw and pH of the products were ranged from 0.84–0.89 and 3–4, respectively.

Effect of Bakers Yeast, Vitamin B12, and Vitamin C as Nutritional Improvement of Food on the Density Production of Brachionus plicatilis Diana Chilmawati; Suminto Suminto
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 important factor of seedling production is live food with good quality. One way to improve quqlity of live food, Brachionus plicatilis, to gain a high quality of larvae in seedling production, is through implementing food enrichment. Chlorella sp, which is its live food, can be enriched by combination of baker’s yeast, vitamin B12 and vitamin C, which then given, in order to increase Branchionus plicatilis growth and nutrition content. Purpose of this study is to acknowledge comparative population growth and improvement of Brachionus plicatilis with different kinds of foods enrichment, to understand the right food enrichment composition for Brachionus plicatilis growth. This research are laboratory experimental, with 10 ind/ml early spread density on 5 litres capacity container. The experiment using a Completely Randomize Design with 4 treatment and 3 repetitions. That four treatments included A (Chlorella sp), B (Chlorella sp + baker’s yeast), C (Chlorella sp + baker’s yeast + vitamin B12), D (Chlorella sp + baker’s yeast + vitamin B12 + vitamin C). Result from the research shows that implementation of food enrichment, which using baker’s yeast, vitamin B12 and vitamin C, brings about a great significant differences (p<0,01) in each treatment to population growth. D is the best treatment with specific growth rate of 0,661, maximal density of 530,4 ind/ml and final density of 381,7 ind/ml. Key Words: Elements of Food Enrichment, Population, Brachionus plicatilis

ANALISIS KELIMPAHAN TOTAL BAKTERI COLIFORM DI PERAIRAN MUARA SUNGAI SAYUNG, MOROSARI, DEMAK (Analysis of Total Abundance of Coliform Bacteria at the Sayung River Estuary, Morosari, Demak) Lani Febriana Safitri; Niniek Widyorini; Oktavianto Eko Jati
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 14, No 1 (2018): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Perairan Muara Sungai Sayung terletak di wilayah Kabupaten Demak sebelah barat. Perairan ini telah dipengaruhi oleh berbagai aktivitas manusia yang menyebabkan terjadinya penurunan kualitas perairan. Bakteri Coliform merupakan bakteri gram negatif yang berbentuk batang dan tidak membentuk spora. Bakteri ini merupakan bakteri indikator terjadinya pencemaran perairan maupun indikator keberadaan bakteri patogen lainnya. Perhitungan total bakteri Coliform perlu dilakukan untuk mengetahui adanya pencemaran limbah organik yang terjadi di Perairan Muara Sungai Sayung, Morosari, Demak. Tujuan dari penelitian ini adalah untuk mengetahui kelimpahan total bakteri Coliform, dan status perairan di Perairan Muara Sungai Sayung, Morosari, Demak. Penelitian ini juga bertujuan untuk mengetahui hubungan dari jumlah total bakteri Coliform dengan bahan organik terlarut dan oksigen terlarut (DO). Pelaksanaan penelitian ini dilakukan pada bulan Mei 2018. Metode yang digunakan dalam penelitian ini adalah metode survei dan teknik pengambilan sampel menggunakan metode random sampling yang dilakukan pada lima stasiun. Hasil penelitian menunjukkan bahwa kelimpahan rata-rata total bakteri Coliform yang diperoleh berkisar antara 4 x 103 – 550 x 10 3/100ml. Kelimpahan rata-rata total bakteri Coliform yang diperoleh pada setiap stasiun menunjukkan bahwa kandungan total bakteri Coliform telah melebihi baku mutu air menurut Keputusan Menteri Lingkungan Hidup Nomor 51 Tahun 2004. Keberadaan total bakteri Coliform memiliki hubungan yang lemah dengan kandungan bahan organik terlarut, sedangkan keberadaan total bakteri Coliform memiliki hubungan yang cukup dengan oksigen terlarut (DO) di perairan Muara Sungai Sayung Morosari, Demak. Sayung River Estuary is located in the western part of Demak Regency. This estuary has been affected by various human activities which have led to a decline in water quality. Coliform bacteria are a gram-negative bacteria that are rod-shaped and do not form spores. This bacterium is an indicator bacteria of water pollution and an indicator of the presence of other pathogenic bacteria. Total Coliform bacteria calculation needs to be carrid out to find out if there any contamination of organic waste in Sayung River Estuary, Morosari, Demak.. The purpose of this research was to determine total abundance of Coliform bacteria, water quality in Sayung River Estuary, Morosari, Demak and relationship between the total abundance of Coliform bacteria with dissolved organic matter and dissolved oxygen (DO). This research was carried out in May 2018. The method that used in this research were survey method and the sampling technique was random sampling method in five stations. The results showed that the average abundance of total Coliform bacteria obtained ranged between 4 x 103 - 550 x 103 / 100ml. Average abundance of total Coliform bacteria obtained at each station shows that the total content of Coliform bacteria has exceeded the water quality standard according to Minister of Environment Decree number 51 of 2004. The total presence of Coliform bacteria has a weak relationship with the content of dissolved organic matter, while the total number of Coliform bacteria have sufficient relationship with dissolved oxygen (DO) in the Sayung River Estuary,Morosari, Demak.

A REVIEW OF PEARL OYSTER (Pinctada maxima) CULTUREIN GENERAL Ludi Parwadani Aji
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 6, No 2 (2011): Jurnal Saintek Perikanan
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

ABSTRACT Pearl oyster culture is unique because the product is gem not flesh and one of the species that produce pearl is Pinctada maxima (Silver or Gold lip pearl oyster). Stock for pearl oyster production can be collected from the wild or hatchery. However, hatchery production is a better solution to supply P.maxima for pearl production rather than just depend on wild stocks. Spat from the wild or hatchery will be grown-out for pearl production by longline or raft culture system method in ocean. Raft culture provide a work platform to repair, clean and store culture tools, while, longline culture has better design to deal with wave or wind exposure. There are identified different culture systems according different species (for example between P.maxima and P.fucata) and locations. Several constraints on P. maxima culture also identify such as biofouling organisms, predations and diseases that can reduce productivity and pearl quality. For example, mass mortalities of P.maxima occurred in Western Australia due to viral infection and it disrupted the pearl oyster industry. Therefore, several strategies are needed to mitigate those problems to achieve maximal productivity by using good management culture practice. Key word: pearl oyster, P. maxima, management, culture

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Journal Mail Official
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Location
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Jawa tengah

INDONESIA