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Journal of Marine Research
Published by Universitas Diponegoro
ISSN : -     EISSN : 24077690     DOI : 10.14710/jmr.v9i4.28340
Core Subject : Science,
Earth & Planetary Sciences
The Journal of Tropical Fisheries Management is managed by the Department of Water Resource Management, Faculty of Fisheries and Marine Sciences, Bogor Agricultural University aims to publish the results of basic, applied research in the scope of fisheries resources, fish stock studies, and population dynamics, fish biodiversity, fisheries technology, industrialization and fish trade, fisheries management, and fisheries development policies in the tropics, especially Indonesia. The scope of the area includes: Marine Fisheries Coastal Fisheries Inland Fisheries The focus and scope of this publication are expected to contribute thoughts for the government to strengthen the science of fisheries management
Arjuna Subject : -
Articles 687 Documents
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Studi Kesesuaian Wisata Pantai Sadranan Kabupaten Gunungkidul Yogyakarta Dan Potensi Pengembangannya Sebagai Kawasan Wisata Bahari Wibisono, Ganang; Pratikto, Ibnu; Koesoemadji, Koesoemadji
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (765.207 KB) | DOI: 10.14710/jmr.v7i2.25903

Abstract

ABSTRAK : Pantai Sadranan memiliki karakteristik yang unik dan berbeda dengan pantai selatan lainnya, yaitu ikan karang beragam, pasir putih, dan memiliki gelombang yang relatif kecil. Penelitian ini bertujuan untuk menilai tingkat kesesuaian wisata pantai, wisata berenang, dan mengetahui daya dukung ekologis kawasan Pantai Sadranan. Menganalisis potensi aktivitas wisata yang cocok untuk Pantai Sadranan dan menyusun strategi pengembangan kawasan wisata bahari. Penelitian ini dilaksanakan pada bulan April – Mei 2016 dengan metode deskriptif. Penentuan stasiun pengambilan sampel menggunakan metode purposive sampling. Analisis data menggunakan Indeks Kesesuaian Wisata (IKW), Daya Dukung Lingkungan Wisata, dan untuk analisa potensi pengembangannya menggunakan Analisis SWOT. Kondisi kualitas air Pantai Sadranan berkualitas baik, salah satu fenomena alam khas Pantai Sadranan yaitu tebing batu dengan volume bongkah batu sebesar 16,83m3, kedalaman perairan berkisar 0,73m – 1,27m, tingkat kecerahan perairan mencapai 100%, kemiringan gisik pantai 8,80, tipe pantai berupa pasir putih, air tawar tersedia dalam radius 20m, tinggi gelombang tahun 2015 sebesar 0,271m, kecepatan arus tahun 2015 sebesar 0,055m/det, lebar pantai 10,317m, flora dan fauna yang beragam. Pantai ini  memiliki nilai IKW kategori rekreasi pantai sebesar 85,71 % sedangkan untuk kategori berenang sebesar 88,57 %, nilai ini termasuk dalam kategori sangat sesuai untuk kegiatan wisata. Daya dukung lingkungan untuk rekreasi pantai adalah 34 orang dan untuk wisata berenang adalah 40 orang. Pantai Sadranan secara umum sangat sesuai untuk dikembangkan sebagai kawasan wisata bahari. ABSTRACT : Sadranan beach has unique characteristics and different from other south coast, that reef fish variety, white sand, and has a relatively small wave. This research aims to assess the suitability of the beach tourism, swimming tourism and know carrying capacity ecological of Sadranan Beach. Analyze the potential of tourism activity that is suitable for the beach Sadranan and strategy of marine tourism development.This research was carried out in April-May 2016 with descriptive method. The determination of the sampling station using a purposive sampling method. Data analysis using the index of suitability of Tourism (IKW), Carrying Capacity Tourism Ecological, and for its development potential analysis using SWOT analysis.Sadranan Beach water quality in good condition, one of the natural phenomena in Sadranan is rock cliff with the chunks of rock volume is 16, 83m3, the depth is 0,73m – 1,27m, brightness water level reaches 100%, the beach slope is 8,80, the beach type is white sand, fresh water is available within a radius of 20 m, wave height by 2015 is 0, 271 m, speed of current year 2015 is 0, 055m/sec, the width of the beach 10, 317m, diverse in flora and fauna. This beach has a beach recreation category of IKW 85.71% whereas for the category of swimming 88,57%, these values are included in the category of very fit. Sadranan beach can accommodate around 34 persons for beach recreational an 40 persons for swimming recreation. In General, the beach is very suitable to be developed as a marine tourism area. 
Struktur Komunitas Fitoplankton Di Perairan Morosari Kecamatan Sayung Kabupaten Demak Fajrina, Hilyati; Endrawati, Hadi; Zainuri, Muhammad
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (455.904 KB) | DOI: 10.14710/jmr.v2i1.2059

Abstract

Morosari waters located in Sayung District, Demak Regency is waters area where there is a mixture of land and sea water. Settlement activity, aquaculture, industrial land and existing at the entry and exit activities of fishing boats around the estuary can contribute to the dynamics of water quality fluctuations and productivity. The dynamics of water quality that occur greatly affect community structure and distribution of phytoplankton in the waters. The results of this study showed 28 genera for the vertical method, while for the method of horizontally obtained 31 genera. Average abundance obtained by the observation station was 1087.09 cells/l with vertical method, while for the horizontal method obtained 884.69 cells/l. While the abundances obtained by times of sampling average of 1087.09 cells/l for the vertical method, while for the horizontal method was 831.38 cells/l. Index phytoplankton diversity showed medium and obtained the average gain by the station is 2.02 for method of vertical and horizontally method to obtain 1.85. While based on the sampling time obtained an average of 2.09 for the vertical method, and for the horizontal method is 1.58. Uniformity index indicates the type of high uniformity and obtained the average by the station is 0.68 for the vertical method, while the horizontal method is obtained 0.4. While the sampling time is obtained based average of 0.64 for the vertical method, while for the horizontal method is 0.51. Dominance index obtained average based on the observation station is 0.3 for the vertical method, while the horizontal method obtained 0.6. While the sampling time is obtained based on an average of 0.35 for the vertical method, where for the horizontal method is 0.48 which indicates there is no dominating genus.
Struktur Komunitas Polychaeta Pada Ekosistem Padang Lamun Alami Dan Buatan Di Perairan Pantai Prawean Bandengan, Jepara Finishia, Tiara; Riniatsih, Ita; Endrawati, Hadi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (265.156 KB) | DOI: 10.14710/jmr.v3i4.11405

Abstract

Penelitian ini dilakukan di Perairan Pantai Prawean Bandengan, Jepara. Penelitian ini dilaksanakan pada bulan Juni – September 2012. Penelitian ini menggunakan metode eksploratif sedangkan untuk penentuan titik lokasi dengan cara mengelilingi sekitar pantai sambil mengobservasi secara visual padang lamun yang kontinyu minimal 100 meter kearah laut. Lokasi penelitian dibagi menjadi 4 stasiun, stasiun I (Kalas), stasiun II (Semak). stasiun III ( Transplan), dan Stasiun IV (kontrol). Sampel polychaeta diambil dengan cara mengambil sedimen dengan bantuan sedimen core berdiameter 2 inchi, setelah itu disaring dengan menggunakan saringan (ukuran mata ayakan 0,5 mm). Polychaeta yang didapatkan kemudian diawetkan dengan formalin 4 % yang telah di tambahkan rose bengole. Identifikasi dilakukan di Laboratorium Biologi FPIK UNDIP. Hasil penelitian menunjukkan ditemukan 2 klas yaitu errantia dan sedentaria. Nilai indeks kelimpahan tinggi, nilai indeks keanekaragaman tinggi, nilai indeks keseragaman tinggi, nilai indeks dominansi tidak ada dominansi
Biologi Kepiting Bakau Scylla Serrata, Forsskål, 1775 (Malacostraca : Portunidae) Berdasarkan Pola Pertumbuhan dan Parameter Pertumbuhan pada Bulan Oktober, November, Desember di Perairan Ketapang, Pemalang Fitriyani, Naily; Suryono, Chrisna Adhi; Nuraini, Ria Azizah Tri
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (644.005 KB) | DOI: 10.14710/jmr.v9i1.26698

Abstract

ABSTRAK: Desa Ketapang, Pemalang merupakan salah satu sumber potensi tangkapan kepiting yang memiliki nilai ekonomis tinggi. Tingginya permintaan pasar baik lokal maupun global menyebabkan  naiknya penangkapan kepiting tanpa adanya restocking sepanjang tahun. Hal ini mengkhawatirkan kondisinya di alam. Penelitian ini bertujuan untuk memonitoring kepiting bakau (Scylla serrata) di Perairan Desa Ketapang, Pemalang dengan mengetahui distribusi ukuran, pola pertumbuhan dan faktor kondisi, serta nilai parameter pertumbuhan berdasarkan persamaan Von Bertalanff. Penelitian ini dilakukan pada bulan Oktober-Desember 2019 dengan 2 kali pengambilan dalam 1 bulan (fase bulan purnama dan fase bulan baru). Metode pengumpulan data pada penelitian ini menggunakan metode survei. Data tangkapan kepiting bakau diperoleh dari hasil tangkapan nelayan yang ada di pengepul kepiting Desa Ketapang. Pengolahan data dilakukan dengan menggunakan Ms. Excel 2013 dan FISAT II. Distribusi ukuran rata-rata lebar karapas kepiting pada bulan purnama yaitu 40,38 ± 7,98 mm, sedangkan pada bulan baru yaitu 39,89 ± 6,48 mm. Pola pertumbuhan kepiting pada bulan Oktober – Desember 2019 menunjukkan pola pertumbuhan allometrik negative (b<3) dengan nilai faktor kondisi diatas 100, yang berarti wilayah Perairan Desa Ketapang mempengaruhi pertumbuhan kepiting dari segi sumber makanan. Didapatkan nilai persamaan pertumbuhan pada saat bulan purnama adalah Lt = 30.8 (1-exp(0.51(t+1.93264))) , sedangkan pada bulan baru adalah Lt = 30.5 (1-exp(4.56(t+0.19933))). ABSTRACT: Ketapang is one of village in Pemalang which has potential sources of crab catches that have high economic value. The high demand of local and global markets cause an increasing in crab catch without any restocking throughout the year. It is worrying about its condition in nature. The study aims to monitor mangrove crabs (Scylla serrata) in Ketapang waters, Pemalang by knowing the size distribution, pattern growth, condition factor, and the value of growth parameters based on The equation Von Bertalanff. The study has been conducted in October-December 2019 with 2 retrievals in 1 month (Full moon phase and New Moon phase). The method of collecting data on this study uses the survey method. Mangrove Crab capture Data is obtained from the catch of fishermen in the crab-Pinke Ketapang village. Data was analyse used Ms. Excel 2013 And FISAT II software. The average size distribution of crab carapace in the full moon is 40.38 ± 7.98 mm, while in the New Moon is 39.89 ± 6.48 mm. The pattern of crab growth in October – December 2019 showed negative allometri growth pattern (b<3) with condition factor value above 100, which means the water area of Ketapang village affects the growth of crabs in terms of food sources. Acquired value of growth equation during full moon is Lt = 30.8 (1-exp (0.51 (t + 1.93264))), while the new Moon is Lt = 30.5 (1-exp (4.56 (t + 0.19933))).
Studi Hubungan Kerapatan Vegetasi Lamun dengan Laju Sedimentasi di Perairan Teluk Awur dan Bandengan Jepara Pada Periode Juni – Juli 2012 Nursanti, Nursanti; Riniatsih, Ita; Satriadi, Alfi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1519.429 KB) | DOI: 10.14710/jmr.v2i3.3128

Abstract

Teluk Awur and Bandengan waters are located in Jepara which have different conditions and also the waters are still good for seagrass growth. Seagrass has one physical function as a sediment catcher in coastal waters. The sedimentation rate in the Teluk Awur and Bandengan waters affected by seagrass density, flow velocity, and sediment composition. The purpose of this research is to determine the relationship of seagrass vegetation density with the rate of sedimentation in the Teluk Awur and Bandengan waters, Jepara. This reaserch was conducted in June-July 2012. in the Teluk Awur waters discovered 6 genus such as Enhalus, Thalassia, Thalassodendron, Cymodocea, Halodule, and Syringodium, with an average value of density 198.03 individu/m2. While Bandengan waters was found 7 genus such as Enhalus, Thalassia, Thalassodendron, Cymodocea, Halodule, Syringodium and Halophila, with average value of density 457.1 individu/m2. The results showed that the average value of sedimentation rate in the Teluk Awur waters 438.74 g/m2/week, while the Bandengan waters 667.42 g/m2/week. The R2 value of relationship between Seagrass density with the sedimentation rate in the Teluk Awur waters 0.566. While the R2 of Bandengan waters 0.073. The Teluk Awur waters contain a little lanau sediment so it has a little sedimenation. Bandengan waters contain higher lanau sediment so it has more sedimentation.
Morfometri Dan Komposisi Isi Lambung Katsuwonus pelamis Yang Didaratkan Di Pantai Puger Jember Jawa Timur Baidhowie, Lutfil Hakim; Redjeki, Sri; Endrawati, Hadi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (665.71 KB) | DOI: 10.14710/jmr.v8i1.24331

Abstract

Ikan Cakalang yang ditemukan di pantai Puger ini memiliki ukuran yang beragam. Nama ilmiah disebut dengan (Katsuwonus pelamis) diambil dari bahasa Jepang yang artinya ikan keras. Umumnya ikan cakalang termasuk  ikan perenang cepat dan mempunyai sifat rakus dalam mencari makan. Ikan cakalang ini mencari makan berdasarkan penglihatan dan rakus terhadap mangsanya. Penelitian ini bertujuan untuk mengetahui kebiasaan makan ikan cakalang (Katsuwonus pelamis) berbagai ukuran yang didaratkan di perairan pantai Puger, Kabupaten Jember. Metode yang digunakan dalam penelitian ini adalah metode frekuensi kejadian. Sampel ikan sebanyak 107 ekor diambil pada tanggal 31 Oktober – 1 Desember 2018. Pengambilan data ikan dilaksanakan di lapangan dengan mengukur berat dan panjang total ikan. Pengamatan lambung ikan dilakukan dengan cara membedah tubuh ikan dan dianalisis komposisi yang terdapat pada lambung ikan cakalang. Dengan menggunakan metode frekuensi kejadian tiap isi yang terdapat pada lambung ikan dicacat dan dinyatakan dalam persen. Hasil dari penelitian menunjukkan dari 107 ekor ikan cakalang yang diamati diketahui distribusi panjang dan berat berkisar 51-92 cm dan kisaran berat 4700-7200 gram. Sedangkan isi yang terdapat pada lambung ikan cakalang adalah ikan,cumi dan udang. Hasil dari perhitungan yang telah dilakukan dapat dijelaskan bahwa organisme ikan yang komposisinya paling banyak dengan nilai persentase pada tanggal 31 bulan oktober sebesar 74%, tanggal 7 bulan November 85%, tanggal 13 bulan November sebesar 91%, tanggal 19 bulan November sebesar 87%, tanggal 25 bulan November sebesar 83% dan tanggal 1 Desember nilai persentase 89%. Ikan cakalang yang terdapat di Pantai puger memiliki petrumbuhan yang bersifat alometrik negatif dengan nilai b sebesar -1,2113 dan a sebesar 0,7585 sehingga diketahui pertumbuhan panjang tubuh ikan lebih cepat dari pertumbuhan berat ikan. Skipjack found on Puger beach have a variety of sizes. The scientific name of it ca lled (Katsuwonus pelamis), it is taken from Japanese which means hard fish. Generally, skipjack is also be included as fast swimmer fish and it has a greedy nature in foraging. This skipjack look for the meal is based on vision and they are greedy for their prey. This study aims to determine the eating habits of skipjack (Katsuwonus pelamis) of various sizes that are landed in the coastal waters of Puger, Jember Regency. The method used in this study is the method of frequency of events. There are 107 fish samples that were taken on 31 October - 1 December 2018. The taking of the data was carried out in the field by measuring the total weight and length of the fish. Observation of fish stomach was done by dissecting the body of the fish and analyzing the composition contained in the stomach of skipjack. Using the method of frequency of occurrence, each content contained in the fish stomach is deformed and expressed in percent. The results of the study showed that 107 of the skipjack that is observed, were known to have a long distribution and weight ranging from 51-92 cm and a weight range of 4700-7200 grams. While the contents contained in the stomach of skipjack are fish, squid and shrimp. The results of the calculations that have been made can be explained that the fish organisms whose composition is the most with a percentage value on October 31 of 74%, November 7, 85%, November 13 of 91%, November 19 of 87%, the 25th of November is 83% and December 1 is a percentage of 89%. The skipjack found in the puger beach has plants that are negative allometric with a value of b of -1.2113 and a of 0.7585 so it is known that the growth of fish body length is faster than the growth of fish weight.
Pendekatan Sel Sedimen untuk Analisa Perubahan Garis Pantai di Kecamatan Kaliwungu dan Kecamatan Brangsong, Kabupaten Kendal Setiaji Bismoko; Warsito Atmodjo; Adi Santoso
Journal of Marine Research Vol 1, No 1 (2012): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v1i1.880

Abstract

The purpose of this research is to study sediment cells to analyze the influence of sediment transport along the coast towards shoreline change, and know the area with erosion and accretion occur along the coast of Kaliwungu Subdistrict and Brangsong Subdistrict, Kendal Regency. The method used to determine the cell sediment is a remote sensing image interpretation and field survey by identifying sources of sediment, the sediment movement and sediment movement limits. The area that experiencing erosion and accretion is obtained from Landsat satellite image overlay. Satellite imagery used in this study is Landsat satellite image recording in 1991, 2001 and 2011. Barangsong Subdistrict and Kaliwungu Subdistrict in year 1991 until 2011 experienced eroded by 8,15 ha and 9,33 ha of accretion. The phenomenon of erosion and accretion in the subdistrict Barangsong and subdistrict Kaliwungu influenced by the source of sediment from the Blorong river, Waridin river, and Sapen river that serve as fixed limits in the concept of sediment cells. Coastline changes that occur in the study area is also due to reclamation that juts into the sea like jeti development and KLI (Kayu Lapis Indonesia).
PERBANDINGAN KOMPOSISI JENIS FITOPLANKTON ANTARA LAUT JAWA DAN BANDA Yuneni, Ranny Ramadhani; Widianingsih, Widianingsih; Endrawati, Hadi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (171.98 KB) | DOI: 10.14710/jmr.v2i4.3685

Abstract

Pytoplankton in the waters has role as primary. Generally, the existence of phytoplankton in waters is supported by availability of light, nutrients, and other marine environment parameters. Java Sea is a sea that has shallow depth and Banda Sea has depth until more than 2000 meters. Many differences of characteristics, certainly organisms including phytoplankton, which are owned both the sea have different composition of phytoplankton, because of many factors influence it. The purpose of this research is study of comparison of phytoplankton spatial distribution horizontally between Java Sea and Banda Sea based on composition.Research was conducted in off shore of Java and Banda Sea. Data was collected with Research vessel of Baruna Jaya III was managed by BPPT (Balai Pengkajian dan Penerapan Teknologi) on 31th August – 9th September 2012. Methods used descriptive explorative. Phytoplankton was collected by plankton net passively that has mashes was 5 μm, lenght 65 cm, and diameter of meshes was 30 cm. Water was filtered as much as 30 l. result of filtering then stored in the bottle (200 ml). Station was collected as many as 14 stations. This Research was found 3 class of Phytoplankton, there were Bacillariophyceae (15 genera), Dinophyceae (4 genera), and Cyanophyceae (1 genera). The average abundance of Java Sea was 139 x 103 cells/m3 (range 115-189 x 103 cells/m3). Banda Sea had abundance range between 89-209 cells/m3 with average 146 x 103 cells/m3. Genera that had the highest of abundance was Rhizosolenia. The diversity index (H’) with range from 0,88 – 2,15 (very low – moderate). Uniformity index (e) values was with 0,67-0,88 (moderate-high), dominance index (D) was ranged from 0,12-0,51, just on station 17 that indicates dominating genus. Java and Banda Sea had identity community index (S) value was 76,47% (high category). Kruskal Wallis test (H) had values was 0,017 that lower than tabulated value of 6,63 at α = 0,01. It means accept H1 conclude that there is no significant difference of phytoplankton abundance between Java Sea and Banda Sea.
Pengaruh Konsentrasi Alginat Dengan Gliserol Sebagai Plasticizer Terhadap Sifat Fisik Dan Mekanik Bioplastik Langit, Novita Thea Puspita; Ridlo, Ali; Subagiyo, Subagiyo
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v8i3.25256

Abstract

Munculnya permasalahan lingkungan akibat plastik sintetik mendorong perlunya penelitian bahan kemasan mudah terurai (bioplastik). Salah satu bahan yang tersedia di alam dan berpotensi sebagai pembentuk bioplastik adalah alginat karena mampu membentuk gel. Bioplastik dari alginat memiliki sifat yang tidak fleksibel sehingga perlu ditambah gliserol sebagai plasticizer. Penelitian ini bertujuan untuk mengetahui pengaruh konsentrasi alginat dari Sargassum sp. terhadap sifat fisik dan mekanik bioplastik dengan penambahan gliserol dan CaCl2. Materi penelitian ini adalah alginat hasil ekstraksi Sargassum sp. yang diambil dari Perairan Pantai Sundak, Gunung Kidul. Penelitian ini menggunakan metode eksperimental laboratoris yang terdiri dari empat perlakuan konsentrasi alginat (0,5%, 1%, 3% dan 5%)  dengan tiga pengulangan.  Sifat bioplastik yang diuji meliputi sifat fisik (ketebalan, ketahanan air, kehilangan berat) dan sifat mekanik (kuat tarik dan elongasi). Data yang diperoleh dianalisis menggunakan analisis sidik ragam (ANOVA). Hasil penelitian menunjukkan semakin tinggi konsentrasi alginat akan meningkatkan  ketebalan, ketahanan air dan kuat tarik bioplastik namun menurunkan elongasi dan kehilangan berat bioplastik. Konsentrasi alginat berpengaruh terhadap sifat fisik (ketebalan, ketahanan air, kehilangan berat) dan sifat mekanik (kuat tarik  kecuali elongasi), konsentrasi alginat terbaik yang memenuhi Japanese Industrial Standard dan standar SNI 7188.7:2016 adalah 0,5% The emergence of environmental problems due to synthetic plastics has led to the need to research biodegradable packaging materials (bioplastics). One of the ingredients available in nature and has the potential to form bioplastics is alginate because it is capable of forming gel. Bioplastic from alginate has inflexible properties so it needs to be added by glycerol as a plasticizer. This research aims to determine the effect of alginate concentration from Sargassum sp. on the physical and mechanical properties of bioplastics with the addition of glycerol and CaCl2. The method of this research is alginate from Sargassum sp. taken from Sundak Beach Waters, Gunung Kidul. This research used a laboratory experimental method consisting of four treatments of alginate concentration (0.5%, 1%, 3% and 5%) with three repetitions. The properties of the bioplastics tested included physical properties (thickness, water resistance, weight loss) and mechanical properties (tensile strength and elongation). Data obtained were analyzed using variance analysis (ANOVA). The results showed that the higher the concentration of alginate would increased thickness, water resistance and tensile strength of bioplastics but decreased the elongation and weight loss of bioplastics. The alginate concentration affects the physical properties (thickness, water resistance, weight loss) and mechanical properties (tensile strength and except elongation), the best alginate concentrations that meet the Japanese Industrial Standard and SNI 7188.7: 2016 are 0.5%
Pengaruh Pemberian Udang Ebi Dengan Konsentrasi Yang Berbeda Terhadap Pertumbuhan Tukik Penyu Lekang (Lepidochelys olivacea) Di Pantai Samas, Bantul Hardiono, Bagus Eko; Redjeki, Sri; Wibowo, Edi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (85.07 KB) | DOI: 10.14710/jmr.v1i2.2021

Abstract

Turtle is an organism that spends his life at sea and be able to migrate long distances along the Indian Ocean, Pacific Ocean and Southeast Asia. The presence of turtles in Indonesia are increasingly threatened with extinction, both natural and human activities that lead to the existence of the endangered sea turtles. The purpose of this study was to determine the effect of giving different feed concentrations on the growth of hatcling olive ridley turtle (Lepidochelys olivacea) The age of 2 weeks during the treatment period of 10 weeks. Data is collected from 21 August to 30 October 2010 using the experimental method. The study was conducted at Samas beach Yogyakarta. Feed given in the form of shrimp ebi 3% and 8% of the weight of biomass. The number of hatchlings that are used are 12 tails that are placed in six containers. Measurement of growth of weight, length and width of hatchlings carried out once every 2 weeks for 10 weeks of observation. The results of the study indicate that the hatchlings fed shrimp ebi with a concentration of 3% have a specific growth rate on average 0366 ± 0008 is smaller than hatchlings fed with a concentration of 8% on average 0425 ± 0006. The results of data analysis using the specific growth rate of the test statistic t with feeding treatment with different concentrations showed that the sig. (2-tailed) = 0.000 or p <0.05. So it can be proved that the specific growth rate in both treatments were significantly different.

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