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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 825 Documents
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Penambahan Berat, Panjang, dan Lebar dari Ukuran Benih yang Berbeda pada Budidaya Kepiting Soka di Desa Mojo Kabupaten Pemalang Muswantoro, Anggit Puji; Supriyantini, Endang; Djunaedi, Ali
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (442.713 KB) | DOI: 10.14710/jmr.v1i1.1995

Abstract

Soka crabs is also called soft-shelled crabs. Soft shell in crab was not because of different type of crab, but it is due to the crab just molted. Events of molting is marked with the release of the old shells and formed newly shells. This molting process produces an increase in body size (Growth). The experiment was conducted in September-October 2011. The research was conducted at Soka crab aquaculture in Mojo village, Ulujami Sub-District, Pemalang District. The method used in this study was field research, by using design random complete with 4 treatment 10 times deut.. Test animals used were the mud crab (Scylla serrata), a total of 40 crabs with initial weight size of 70-110 grams. Test animals were grouped into 4 groups of of weight, which were A (of weight 70-80 grams), B (80.1 to 90 grams), C (90.1 to 100 g) and D (100.1 to 110 grams). Each group of size consisted of 10 crabs. Test containers used were plastic box with a density of 1 individual / box. The results showed that the difference in weight grouping gave results that were not significantly different (p> 0.05) for weight, length and width after molting. Differences in weight grouping also gave different FCR values that were not significantly different (p> 0,05). This was probably due to the grouping of weight used was still relatively narrow. Mangrove crab survival rate level for all groups of size showed an average value of 100% and water quality was quite good and decent for soft-shelled crabs aquaculture.
KONDISI TERUMBU KARANG PADA LOKASI WISATA SNORKELING DI KEPULAUAN KARIMUNJAWA, JAWA TENGAH Biondi, Ias; Munasik, Munasik; 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 (11467.646 KB) | DOI: 10.14710/jmr.v3i3.5990

Abstract

Peningkatan jumlah kunjungan wisata snorkeling di Taman Nasional Karimunjawa dikhawatirkan dapat mengakibatkan penurunan tutupan terumbu karang pada lokasi wisata snorkeling. Penelitian ini dilakukan  untuk mengetahui kondisi terumbu karang dan bentuk – bentuk kerusakannya akibat wisata snorkeling. Penelitian ini menggunakan metode deskriptif dengan manta tow untuk pengambilan data terumbu karang dan metode survey untuk kualitas perairan seperti suhu, salinitas, pH dan kecerahan. Persentase tutupan terumbu karang hidup pada lokasi wisata snorkeling di Taman Nasional Karimunjawa sebesar 33%-52,5%. Kondisi ini termasuk dalam kategori buruk-baik. Persentase tutupan terumbu karang hidup tertinggi terdapat pada Pulau Sintok dengan nilai 52,5% dan persentase tutupan terumbu karang terendah terdapat pada Pulau Menjangan Kecil dengan nilai 33%. Kerusakan terumbu karang yang ditimbulkan dari wisata snorkeling dapat berupa rubble (patahan karang) dan karang keras mati dikarenakan terinjak maupun terkibas fins.
Aktivitas Antioksidan Kitosan yang Diproduksi dari Cangkang Kerang Simping (Amusium sp) dan Kerang Darah (Anadara sp) Cakasana, Nadya; Suprijanto, Jusup; Sabdono, Agus
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (263.917 KB) | DOI: 10.14710/jmr.v3i4.8360

Abstract

Limbah cangkang kerang simping dan kerang darah di Semarang merupakan jenis limbah hasil perikanan yang pengolahannya belum maksimal sehingga masih menjadi masalah lingkungan. Penelitian ini bertujuan untuk mengetahui kualitas kitosan dua bagian cangkang kerang simping dengan warna berbeda dan cangkang kerang darah yang dapat dilihat dari derajat deasetilasinya serta mengetahui aktivitas antioksidan dari kitosan ketiga jenis cangkang tersebut.Pembuatan kitosan dilakukan dengan proses demineralisasi, deproteinasi, dan deasetilasi. Uji derajat deasetilasi dilakukan dengan metode spektroskopi FTIR dan uji aktivitas antioksidan dilakukan dengan metode DPPH. Uji proksimat kitosan setiap cangkang dilakukan untuk memperoleh data pendukung. Penelitian ini dilaksanakan pada bulan April - Mei 2014. Sampel cangkang diambil dariTambak Lorok, Semarang. Hasil penelitian menunjukkan bahwa derajat deasetilasi kitosan cangkang simping merah sebesar 66,27%, kitosan cangkang simping putih sebesar 71,37%, sedangkan pada kitosan cangkang kerang darah sebesar 69,72%. Hasil uji DPPH menunjukkan persentase negatif pada masing-masing ketiga sampel kitosan cangkang yang ditandai dengan tidak adanya perubahan warna pada DPPH. Berdasarkan hasil penelitian tersebut dapat disimpulkan bahwa ketiga sampel kitosan cangkang tidak memiliki aktivitas antioksidan sebagai senyawa penangkal radikal bebas.
Pengaruh Perbedaan Intensitas Cahaya Terhadap Kelimpahan Arthropoda di Perairan Desa Tambakpolo, Demak Bramasta, Arrico Fathur Yudha; Setyati, Wilis Ari; 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 (701.432 KB) | DOI: 10.14710/jmr.v9i1.25776

Abstract

ABSTRAK: Zooplankton merupakan organisme laut yang memiliki peran dalam rantai makanan di laut. Zooplankton berperan pada tingkat energi kedua yang menghubungkan produsen (fitoplankton) dengan konsumen tingkat tinggi. Penelitian ini bertujuan untuk mengetahui komposisi dan struktur komunitas Arthropoda dengan dua perbedaan intensitas cahaya (300 lux dan 2000 lux). Penelitian ini dilakukan menggunakan metode purposive sampling yang terdiri dari tiga stasiun. Pengambilan sample zooplankton dilakukan dengan bantuan plankton net yang ditarik kapal tiga kali pengulangan. Berdasarkan penelitian ditemukan 5 genus yaitu Calanus, Paracalanus, Sergia, Eucalanus dan Candacia. Genus yang paling banyak ditemukan adalah Calanus dan Sergia. Kelimpahan Arthropoda tertinggi terdapat pada Stasiun 1 dengan intensitas 2000 lux sebesar 8.492 ind/L dan terendah pada Stasiun 3 dengan intensitas 300 lux sebesar 2.286 Ind/L, hal ini diduga karena pengaruh gaya fototastik positif dari fitoplankton terhadap sumber cahaya yang direspon baik oleh zooplankton khususnya Arthropoda sebagai sumber makanan. Tingkat keanekaragaman (H’) Arthropoda di perairan tersebut termasuk dalam kategori rendah, indeks keseragaman (E) dalam kategori rendah, dan terdapat dominansi (C). ABSTRACT: Zooplankton are those organisms which have a role in  food-web in aquatic ecosystems. Zooplankton as second trophic level organism whose connects producers (phytoplankton) with consumers at a higher trophic level. This research aims to know the composition and structure of the Arthropode community with two differences in light intensity (300 lux and 2000 lux). This research was done by using purposive sampling method which consists of three stations, by using a plankton net that was pulled by the boat. The results of the study found five genera namely Calanus, Paracalanus, Sergia, Eucalanus, Candacia. The most common genera are Calanus and Sergia. The highest abundance of Arthropode at Station 1 with an intensity 2000 lux is 8.492 ind/L and the lowest at Station 3 with an intensity 300 lux is 2.286 Ind/L. The level of diversity (H') of Arthropode categorized as low, the index of uniformity (E) is categorized medium, the level of dominance (C) is classified as high.
KOMPOSISI DAN KELIMPAHAN GASTROPODA DI VEGETASI MANGROVE KELURAHAN TUGUREJO, KECAMATAN TUGU, KOTA SEMARANG Haryoardyantoro, Seto; Hartati, Retno; Widianingsih, Widianingsih
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (127.866 KB) | DOI: 10.14710/jmr.v2i2.2469

Abstract

Mangrove forest is one of the unique natural ecosystems with high productivity. That comes from organic detritus or litter fall which is essential nutrient sources for organism souch as fish and inverterbrates, one of which is gastropod. The purpose of this study was to determine the composition and abundance of gastropods found in mangrove vegetation Tugurejo Village, District Tugu, Semarang. This study was conducted in September 2011-March 2012. This study material is all gastropods found at the sites. Research consists of 4 stations and samples were taken with using transek (1 x 1) m2 in 3 sub stations. The research revealed that there were 11 species of gastropod belonged to 3 families, i.e. C.rithidea cingulata cingulata, Cerithidea sp.1, Cerithidea sp.2, C. quadrata, T. telescopium, Terebralia palustris (Potamididae), Littorina articulata, L. carinifera, Littorina pallescense (Littorinidae), and Sphaerassiminea miniata (Assiminidae). The species most frequently found was C. cingulata cingulata and T. telescopium. While most species rarely found is C. quadrata. The highest abundance average value was found at Station C which was dominated by Avicennia marina. The diversity index (H ') at Station A and B was low, while at Station C and D was moderate. The Uniformity Index (e) at Station A and B was low but at Station C and D was high and moderate. There was species dominance is Cerithidea cingulata cingulata at Station C.
Kajian Kesesuaian Ekosistem Terumbu Buatan Biorock Sebagai Zona Wisata Diving Dan Snorkeling Di Pantai Pemuteran, Bali Ikhsani, Nugraha Ridho; Trianto, Agus; Irwani, Irwani
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1082.081 KB) | DOI: 10.14710/jmr.v3i4.11429

Abstract

buatanBiorock sebagai zona wisata diving dan snorkelingdi Pantai Pemuteran, Bali. Penelitian ini dilakukan dengan menggunakan metode deskriptif dengan matriks kesesuaian wisata diving dan snorkelingoleh Yulianda (2007) meliputi persentase luasan tutupan karang, kecepatan arus, kedalaman terumbu karang, kecerahan perairan, jumlah lifeform karang dan jumlah spesies ikan. Data pendukung yang digunakan dalam kegiatan peneltian ini yaitu parameter kimia-fisika perairan, meliputi: suhu, salinitas, derajat keasaman and data meteorologi meliputi: curah hujan, kecepatan angin, dan gelombang. Hasil dari penelitian menunjukkan persen tutupan karang yang didapat adalah 66,7 %, 50,6 %, 43,92 %, dan 47,35 %. Data jumlah life form yang didata adalah 5, 7, 6, dan 7. Data jumlah spesies ikan yang didata adalah 9 spesies, 13 spesies, 34 spesies, dan 43 spesies Tingkat kecerahan perairan yang diperoleh adalah 100 %, 100 %, 58 %, dan 93 %. Data kecepatan arus yang diperoleh adalah 6,28 cm/detik, 8,58 cm/detik, 22,4 cm/detik, dan 1,58 cm/detik. Data kedalaman terumbu karang yang diperoleh adalah 3 meter, 8 meter, 10 meter, dan 7 meter. ekosistem terumbu karang pada lokasi Biorock termasuk kategori S2 (sesuai) dengan skor pada stasiun 1, 2, 3, dan 4 adalah 2,95; 2,95; 2,58; 2,91. Berdasarkan hasil perhitungan dari Indeks Kesesuaian Wisata untuk kegiatan diving dan snorkeling, seluruh stasiun penelitian mendapatkan skor 2,5 -3,25. Hal ini menunjukkan bahwa kawasan Pantai Pemuteran masih tergolong kategori Sesuai (S2) untuk kegiatan diving dan snorkeling.
Struktur Komunitas Zooplankton di Perairan Desa Mangunharjo Kecamatan Tugu Semarang Ana, Desy Lasri; Endrawati, Hadi; Santosa, Gunawan Widi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (145.214 KB) | DOI: 10.14710/jmr.v2i3.3149

Abstract

Mangunharjo village waters is located in Subdistrict Tugu, Semarang is the waters close to densely populated settlements. Household waste and industrial waste will affect water quality and community structure of zooplankton in waters. The aims of the research was to find out the community structure of Zooplankton in the village Mangunharjo Waters, subdistrict Tugu, Semarang. The method in this research was case study method with the exploratory nature of data collection used Sample Survey Method. The location was set as a research location was the location 1, as the areas of a body of a river, Location 2 as the river estuaries, and Location of 3 as ocean waters. Sampling was performed every 2 weeks for 5 times the sampling making use planktonnet with mesh size 45 μm. Sampling was carried out vertically at high tide and low tide began from May to July 2012. The results obtained 49 genera at high tide, while at low tide obtained 44 genera. Abundance obtained when the observation was an average of 17.90 specs/L at high tide, and at low tide the average gained 20.49 specs/L. Diversity of zooplankton an average of 2.20 obtained at high tide, and an average of 2.13 obtained at low tide. Homogeneity obtained average for sampling at the time of high tide and low tide with the same value at 0.56. The index domination at high tide and low tide also have the same value, the average 0.44.
Tingkat Herbivori Daun Mangrove Rhizopora mucronata dan Rhizophora apiculata Hasil Replantasi di Ujung Piring, Kabupaten Jepara Widianto, Nur Cahyo; Pribadi, Rudhi; Pratikto, Ibnu
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (414.616 KB) | DOI: 10.14710/jmr.v8i3.25266

Abstract

Tujuan dari penelitian ini untuk mengetahui tingkat herbivori R. apiculata dan R. mucronata, dan ketinggian pohon serta umur daun di vegetasi mangrove Di daerah Ujung Piring, Kabupaten Jepara. Metode yang digunakan dalam penelitian ini adalah metode deskriptif yaitu metode pencari fakta dengan interpretasi secara tepat, penentuan lokasi pengambilan sampel dilakukan dengan metode purposive sampling. Sampel daun mangrove dari spesies R. apiculata dan R. mucronata diambil dari tiga kategori ketinggian yang berbeda yaitu <1 m dan >1-3 m, masing-masing sebanyak 10 ulangan (pohon) untuk setiap kategori. Daun dipisahkan berdasarkan umur daun (tua atau muda) serta kondisi daun (utuh atau rusak) total daun diambil sebanyak 10%. Hasil penelitian menunjukan nilai rerata tingkat herbivori R. apiculata yaitu 4,66% kisaran (0,16% - 8,93%) sampai dengan 11,59% kisaran (2,14-21,97%) sedangkan pada R. mucronata yaitu 5,23% kisaran (0,31-9,94%) sampai dengan 11,37% kisaran (2,56-17,91%). Berdasarkan uji statistik dapat disimpulkan bahwa faktor spesies, ketinggian dan umur daun berpengaruh nyata terhadap tingkat herbivori pada kedua spesies R. apiculata dan R. mucronata yaitu: (P<0,05). The purpose of this research is to know the herbivory level of R. apiculata and R. mucronata, the tree height and the age of the leaves in mangrove vegetation Dusun Ujung Piring, Jepara District. The method used in this research is descriptive method and that means fact finding method with the correct interpretation, in determining the location of the sampling is done by purposive sampling method. Samples of mangrove leaves from the R. apiculata and R. mucronata species were taken from three different height categories: <1 m and > 1-3, each of 10 replicates (trees) for each category. Leaves are separated by the age of the leaves (old or young) and leaf condition (whole or damaged) leaves in total are taken as much as 10%. The results showed that the average value of herbivory level of R. apiculata was 4,66% (0,16-8,93%) up to 11,59% (2,14-21,97%) while in R. mucronata 5,23% (0,31-9,94%) up to 11,37% (2,56-17,91%). Based on statistical test it can be concluded that species factor, height and leaf age have a real impact on the herbivory level on R. apiculata and R. mucronata.
Pengaruh Penggunaan Berbagai Jenis Pakan Terhadap Pertumbuhan Tukik Penyu Hijau (Chelonia mydas) Adi Wibowo, Yulius Basuki; Sunaryo, Sunaryo; Ambariyanto, Ambariyanto
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.v1i1.2845

Abstract

Indonesia is known as archipelagis country which high marine biodiversity, includ turtle. there are six species of sea turtles are found In Indonesia i.e. Green turtle (Chelonia mydas), Hawksbill turtle (Eretmochelys imbricate), Dark turtle (Lepidochelys olivacea), leatherback turtle (Dermochelys coriacea), Natator depressa and Carreta Carreta. The green turtles (Chelonia mydas) were the most intensively exploited and classified in endangered species. One the efforts to protect sea turtle population is by realism turtle hetcling to the sea. The research was conducted on September 2009 in Pangumbahan beach, Sukabumi. The method used in this study is an experimental using a Completely Randomized Design (CRD) with 3 treatments and 3 replications. The results showed that there was symulicat different on the growth of Green Turtle hatchlings that were given different type of feed (p = 0.021 for hatchling weigth), (p = 0.013 for hatchling length), and (p = 0.032 for hatchling width). Further analysis (Tukey’s test) showed that rebon shrimp feed give effect on the growth of Green Turtle hatchling eiter based on weigth, length or width of the hetchling.
SKRINING AKTIVITAS ANTIBAKTERI PADA EKSTRAK Sargassum polycystum TERHADAP BAKTERI Vibrio harveyi DAN Micrococcus luteus DI PULAU PANJANG JEPARA Riyanto, Erwin Ivan; Widowati, Ita; Sabdono, Agus
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (742.76 KB) | DOI: 10.14710/jmr.v3i2.4972

Abstract

Sargassum polycystum mempunyai berbagai macam zat senyawa bioaktif yang memiliki potensi sebagai antibakteri, antivirus, antijamur, serta antikanker. Pemanfaatan bahan hayati laut sebagai obat antibakteri adalah terobosan baru sebagai alternatif, obat yang sifatnya alami mempunyai efek samping lebih rendah dari pada obat sintetis, karena obat alami bisa tereduksi oleh tubuh ikan budidaya dan mudah tedegradasi lingkungan, sehingga dapat menambah nilai ekonomi Sargassum polycystum tersebut. Pelarut etil asetat mempunyai aktivitas antibakteri paling baik terhadap bakteri Vibrio harveyi dan Micrococcus luteus. Hal tersebut dibuktikan dengan  nilai MBC (minimum bacteriosidal concentration) mencapai konsentrasi 0,5 µg/disk dengan nilai diameter 1.67 mm terhadap bakteri V. harveyi  dan 4.55 mm terhadap bakteri M. luteus. Ekstrak Sargassum polycystum positif mengandung senyawa alkaloid pada ekstrak menggunakan pelarut heksana dan senyawa steroid pada pelarut metanol, Etil asetat, dan heksana. Uji toksisitas ekstrak Sargassum polycystum memiliki efek toksik terhadap Artemia salina dengan kategori toksik golongan kronis pada pengamatan ke-24 jam, dengan kata lain ekstrak Sargassum polycystum bersifat racun pada organisme hidup.

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